THE UNIVERSITY OF ILLINOIS LIBRARY Presented by- Charles Brockway Gibson Class of 1877 1927 mm. illlliii M /a'jA’*/V r^r-s~j'^S f .ca ;f •■■. c a ; _>*f. ;,v rs a w V * gJl&'Ss!-.-.Vi& ‘Sk'rtyi r \ ■ \ / '■■ ytyr' \V| r /S /^=\ ^ < O ■'"' O y-v ^ y-' y ' _ y-v y—v WHsAUMPK! w^nvj T TT^j^AWiAftfliS SffiSj Stoi2|®§& HOUSE OF REPRESENTATIVES. 57th Congress, 2d >Session . Document No. 451. Professional Paper No. 14 Series { D ’ Petr °g ra P h y and Mineralogy, 23 l E, Chemistry and Physics, 37 DEPARTMENT OF TPIE INTERIOR UNITED STATES GEOLOGICAL SURVEY CHARLES D. WALCOTT, Director CHEMICAL ANALYSES OF IGNEOUS ROCKS PUBLISHED FROM 1884 TO 1900 WITH A CRITICAL DISCUSSION OF THE CHARACTER AND USE OF ANALYSES BY WASHIN G T O N GOVERNMENT PRINTING OFFICE 1903 ( / P-1F^ S /— yj / S T ? , U ■ « CONTENTS Letter of transmittal.. Preface. Introduction. The character of rock analyses. General considerations. Representativeness. Character of the rock mass. Amount of material... Microscopical examination. Accuracy. Possible errors.,.. Completeness. Main constituents... Minor constituents. Rating of analyses. Accuracy . Internal evidence. Agreement with the mode... Summation.. External evidence. Analyst. Methods... Indirect evidence. Completeness. Rating adopted in the tables. Discussion of the tables. Division into parts. Part I. Part II . ... .. . Basis of arrangement of analyses. Attempted use of current petrographic system... Adoption of the quantitative system. Quantitative classification of igneous rocks. Construction of the system. Nomenclature of the system. Comparison of old and new nomenclatures. 3 Page. 5 11 13 13 16 16 18 19 19 20 23 24 25 28 29 30 30 33 36 36 36 36 Ol 38 43 43 44 45 46 46 47 47 47 48 49 621057 4 CONTENTS. Discussion of the tables—Continued. Quantitative classification of igneous rocks—Continued. Page. Tabular exhibit of divisions and names of quantitative system (5 tables). 53 Reasons for arrangement according to the quantitative classification. 59 Distribution of rocks by new system. 61 Comment on facts expressed by tables. 62 Various features of the tables. 64 Geographical arrangement. 64 Numbering of analyses. 65 Rating of analyses. 65 Results of rating analyses. 65 Constituents. 67 Specific gravity. 68 Norm. 68 Correspondence of norm and mode. 69 Locality. 69 Analyst. 70 Reference. 70 Author’s name. 71 Remarks... 71 Correlation of the qualitative and the quantitative systems. 72 From the qualitative point of view. 73 From the quantitative point of view. 76 Meteorites. 81 Calculation of center points. ( 81 Introductory. 81 Persalane. 84 Perfemane. 88 Distribution of magmas and the average rock. 100 Introductory.;. 100 The distribution of magmas. 102 The average rock. 106 First method. 106 Second method. 109 List of abbreviations. 116 Collection of rock analyses. 121 Part I. 121 Part II.-. 371 Glossary. 475 Prefatory note to indexes. 481 Index to text. 483 Index to new rock names in Part I. 486 Index to old rock names in Parts I and II. 489 Index to localities in Parts I and II. 493 LETTER OF TRANSMITTAL. Department of the Interior, United States Geological Survey, Washington, D. C ., March 20, 1903. Sir: I have the honor to transmit to you a manuscript entitled “Chemical Analyses of Igneous Rocks published from 1884 to 1900, with a critical discussion of the character and use of analyses,” by Henry Stephens Washington, and to recom¬ mend that it be published by the Survey as a Professional Paper. This work is pri¬ marily a compilation of chemical analyses, and is especially valuable to petrographers and chemists, for it places in one volume material gathered from a great many scat¬ tered sources. The critical discussion of the value and use of rock analyses, with comments upon methods of analysis and a review of the bearing of this mass of material upon rock classification, is also of much importance to both petrographers and chemists. The arrangement of the analyses according to the quantitative system for the classification of igneous rocks permits one to compare readily anj^ new analysis with many others of closely allied rocks. A work of this kind is necessarily very expensive when published by a commercial house, and if so issued would be beyond the reach of many who would desire to use it. It is particularly appropriate that the Survey should publish this work, because a very large proportion of the rock analyses here included have been made in the laboratory of the United States Geological Survey, upon material which is preserved in its petrographic reference collection. The use of that collection will be greatly facilitated by this work. Very respectfully, Whitman Cross, Geologist in Charge Section of Petrology. Hon. Charles D. AValcott, Director II. S. Geological Survey. 5 ' I i P R EFACE. The collection of chemical analyses of igneous rocks here presented was made during a period covering several years, for purposes of ready reference in certain lines of investigation. In view of the great value of that standard work of reference, Roth’s Tabellen, and of the fact that no such collection of rock analyses has appeared since the last installment of these in 1884 , a it was thought that an extension and completion of these along the lines of Roth's work, so as to bring them down to the present day, would be welcome to petrographers. This seemed to be the more advisable because the years that have elapsed since 1883 have witnessed a very marked increase in the number, as well as a great improvement in the quality, of chemical analyses of rocks. These years have also shown a steady increase in the importance of chemical analyses as applied to the discussion of petrological problems, and a growing tendency to use them as bases for various systems of classification which have been proposed. The classificatory work on which I have been engaged in collaboration with Cross, Iddings, and Pirsson, the results of which have recently appeared, 6 was also a powerful incentive to the formation of the present collection. As has been stated by us, this collection has been appealed to whenever possible, as a test of our proposed system of classification, and has also formed to a large extent the basis of the roots of the magmatic names suggested. The years embraced in the present collection are those from 1884, that of the publication of the last of Roth’s Tabellen, to 1900, both inclusive. The former was selected as a starting point because Roth collected nearly all the analyses which appeared in 1883; yet some of those which he overlooked are included in this col¬ lection. The year 1900 seemed to be appropriate as the other time limit, partly for the reason that it was the closing year of the last century, and partly because in that year appeared Bulletin 108 of the United States Geological Survey, which is the latest publication embracing all the analyses of rocks made by the chemists of that organi¬ zation. At the same time, since the collection is to a large extent illustrative of our a Roth, J., Beitrage zur Petrographie der plutonischen Gesteine: Sitzungsber. K. Preuss. Akad. Wiss., Berlin, 1884. ^Journal of Geology, Vol. X, 1902, p. 555; also, Quantitative Classification of Igneous Rocks, Chicago, 1903. 8 PREFACE. proposed system of classification and nomenclature, some analyses published prior to 1884 or subsequent to 1900 that are of especial interest or importance have been included, as illustrations of the classificatory divisions, or as forming the bases of the magmatic names. The endeavor has been made to present all analyses of igneous rocks, good, bad, and indifferent, that have been published within the time limits selected. For this purpose I have examined the most complete accessible files of all known geological survey publications, as well as those of geological and other scientific societies, the various geological journals, inaugural dissertations, etc. It is of course impossible that all analyses published during the time given should have been collected. Some of the less well-known publications of scientific societies are inaccessible in this country, and, indeed, at the time the material was collected (1900 and 1901) the later publications of some of the surveys and societies were, for obvious reasons, not to be had here. But it is believed that the collection is fairly complete, and that it contains at an} 7 rate a record of much of the most useful and noteworthy chemical work of the seventeen years which it represents. It is hoped that occasional appendixes will be published later, in which, if possi¬ ble, many of the analyses here overlooked will appear. For this purpose I shall esteem it a favor to have my attention called to omissions, and shall be under great obligations to those who will be kind enough to send separates of publications which have been overlooked in the present collection or which may appear subsequently in journals that are accessible here with difficulty or not at all. It is to be regretted that the current reviews publish so few of the analyses contained in the papers reviewed, for these analyses are often of the greatest interest. In the present trend of petrology they are often of much more importance than the microscopical details, which are frequently cited at length. Although great care has been taken to guard against errors in collecting the analyses, preparing the manuscript, and reading the proof, mistakes are almost unavoidable in dealing with the mass of figures represented. I can not venture to hope that they have been entirely eliminated, and can only express my regrets at their existence, and trust that my attention will be called to them—a favor which will be very highly appreciated. The collection is strictly confined to analyses of igneous rocks. It was at one time intended to include also those of metamorphic rocks, but the delay which this plan would have involved seemed finall} 7 to render it inadvisable, though a fairly complete collection of such analyses had also been made in conjunction with those here given. Sedimentary rocks of all kinds have also been omitted, though analyses of volcanic tuffs are included. Analyses of serpentines are likewise excluded, since they are due either to the decomposition of igneous rocks, so that, as explained PREFACE. 9 elsewhere, their analyses would fall under the ban imposed on such altered material, or are derived from either metamorphics or mineral masses, and hence fall outside the scope of the present collection. It was hoped for a time that analyses of meteorites could be given; but owing to the fact that no adequate collection of the analyses of these bodies has yet been made, this would have involved a search through the voluminous and widely scattered lit¬ erature published concerning them since the commencement of their study. Such a proceeding would have postponed indefinitely the appearance of this work, and therefore, as well as in view of the fact that they form the subject of special study, the project was abandoned. I am informed, furthermore, that such a collection is already being undertaken by another, so that it is to be hoped that this.serlous lacuna will shortly be tilled. It may seem to many petrographers who are acquainted with the chemical analy¬ sis of rocks that certain portions of this subject have been gone into with unnecessary detail, or that many truths are stated which are obvious to any one conversant with the subject. That this is true to a large extent is admitted, but it must be remem¬ bered that the greater part of the text which is devoted to this subject has been written with the nonanalvtical reader in mind, to whom much of what is here given will undoubtedly prove novel. As will be evident from a perusal of the text and from a study of the analyses here presented, there are far too many petrographers to whom the principles and methods of chemical analysis are as a sealed book, and in their case I can only feel that if I have erred it has been on the side of too little explicitness or detail. The new terms and names used are those proposed in connection with the recently published quantitative classification, and their meanings will be found in the glossaiy given on pages 479-483. No apology is offered for their introduction, since in mam r cases they are the only terms available to express the ideas which it is desired to convey, at least without the use of much longer or circumlocutory phrases, and it was desired as well to take this opportunity of making them more familiar to petrographers. The progress of the work has been greatly facilitated by the kindness of many friends, to whom it is a pleasure to express obligations. I am especially indebted to the officials of the libraries of Yale and Columbia universities and of the United States Geological Survey, who courteously afforded me the fullest facilities in the examination of serial and other publications. Without their assistance this collection could not have been made satisfactorily complete. I am also indebted to several friends, among whom I may mention especially Profs. J. F. Kemp and J. B. Harrison, for several unpublished analyses, which they kindly allowed me to insert in the tables. To my friends Dr. Cross, Professor 10 PREFACE. Iddings, Professor Pirsson, and Dr. Hillebrand 1 am grateful for many valuable sug¬ gestions and criticisms. Nearly the whole of the manuscript of the text has been submitted to my colleagues in the new classilication, so that the views here expressed may be regarded, in general, as having their indorsement, and as expressing the ideas of all four. Last, but by no means least, I must express my sense of deep obligation to the Hon. C. D. Walcott for his kindness in allowing the work to appear as a Survey pub¬ lication. It is gratifying to feel that this hospitality is in part repaid by the incon¬ testable evidence the present volume affords of the preeminent place in rock analysis that is held by the organization of which he is the Director. Finally, I must express my regret at the dela} 7 in the appearance of the work, which is published more than two years after the limiting date of the collection. 1 can only plead in extenuation the pressure of other work, especially that in connec¬ tion with the new system of classification, and trust that the time which has elapsed has but added to whatever worth the volume may possess. 1 CHEMICAL ANALYSES OF IGNEOUS ROCKS. By H. S. Washington. INTRODUCTION. In the first two or three decades of the last century, when the study of rocks as such was being differentiated from that of minerals and of rock terranes—that is, when the science of petrogaphy was in its infancy—little attention was paid to their chemical features. It is true that a number had been analyzed, but these were for the most part rocks that were of such a character as to lead the investigator of those early daj^s to consider them as minerals, as was the case with the first described lherzolite and wehrlite. In contradistinction to the individually well-defined min¬ erals, rocks were regarded as merely aggregates of minerals, in presumably fortui¬ tous combinations, and lacking that definiteness or constancy of composition in one mass or in different masses which would justify their chemical study as a whole. As, however, they became more and more the subjects of special research, beginning with the earliest investigations of Cordier,® a knowledge of their chemical composi¬ tion assumed gradual^ increasing interest. The great importance of this side of the study of rocks was first clearly recognized by Abich/ who pointed out, as early as 1841, the necessity of a knowledge of their chemical composition for the solution of such problems as their origin, mode of formation, and connection with the interior of the earth, as well as the value of a comparison of their analyses as a proper basis for their classification and nomenclature. To him, therefore, is due the credit of introducing the chemical composition of rocks as a basis for their classifi¬ cation; though the good influence of this suggestion for their right understanding was largely nullified by the coincident use of the feldspars alone as one of the main factors of classification/ an idea which has had a deplorably retarding influence on the development of systematic petrography for many } r ears, and which, even at the present da}% holds many systematists firmly in its grasp. «Cf. Cross, Whitman, Jour. Geol., Vol. V, 1902, p. 352. b Abich, H., Natur der Vulkanische Bildungen, Braunschweig, 1841, p. v. c Cross, Whitman, loc. cit., p. 362. 11 12 CHEMICAL ANALYSES OF IGNEOUS ROCKS. For about thirty years alter Abides publication chemical analyses occupied a prominent position in petrographical discussions, being employed largely for the purpose of determining the mineral composition of rocks. Abich, in the work just cited, had adopted as a means to this end the ratio of the oxygen of the bases to that of the silica, and was thus enabled to calculate approximately their mineral composi¬ tion, as Rammelsberg and others had also done. A modification of this method, known as the “Oxygen-ratio” (Sauerstoffquo- tient), was introduced by Bischoff,® and was long employed for the correlation of rock analyses and for the investigation of the question whether the various oxides were present in rocks in stoichiometric proportions or not. This ratio is obtained, for ant" given rock, Ir^ dividing the amount of the oxj^gen in all the bases by that present in the silica, and was supposed to be characteristic of different broad groups. This supposition was eventually found to be unwarranted, as rocks of very diverse chemical or mineralogical characters were shown to have the same oxygen ratio. It is noteworthy that, although he himself pointed out this and other grave objections to the use of this ratio, 6 Roth gives it in connection with the separate analyses in all his tables, even in the last one, published in 1884. He explains this by sa} T ing c that it is done, “only in the absence of a better means of comparison, as well as to make it possible to compare the older and newer analyses.” It was also shown by Roth and others that rocks could not be referred to simple chemical formulas; in other words, that the oxides were not present in stoichiometric proportions. This, indeed, is one of the most important of the results arrived at by Roth from a study of the analyses collected by him, and first published in 1861. Shortly after Bischoff’s suggestion of an oxygen ratio there appearedBunsen’s well-known hypothesis of the formation of igneous rocks b} r the mixture of two supposed original magmas—the normal trachytic and the normal pyroxenic. For the application or the discussion of this hypothesis, analyses were, of course, all- important. Founded, as the hypothesis was, on limited and totall} T insufficient data, it had to yield to the evidence furnished by the many analyses to which it had given rise. With the abandonment e of this view of the genesis of igneous rocks, and owing to the coincident introduction of the microscope in the early seventies, analyses lost much of their importance. Though they were still published, it is evident that they were, as a rule, inserted perfunctorily in petrographical writings, in obedience to custom, as ornamental embellishments. Little or no stress was laid on them, and the chief efforts of the petrographer were devoted to the elucidation of the purely min¬ eralogical and textural characters of the rocks described. a Bischoff, G., Lehrb. Cheni. Geol., Vol. II, 1849, p. 631. b Roth, J., Gesteins-Analysen, Berlin, 1861, p. x. c Roth, J., Beitr. Petrog. Pluton. Gest., 1869, p. 87. <1 Bunsen, R., Pogg. Ann., Vol. LXXXIII, 1851, p. 197. e Cf. Zirkel, Lehrbuch, Vol. I, 1893, pp. 658 et seq. CRITICAL VALUATION OF ANALYTICAL WORK. 13 ' The microscope poured a flood of light upon the mineralogical constitution as well as the texture of rocks, and rendered easy and certain of attainment results which by the older methods, based on analysis,>had been attained only with difficult}' or not at ali. At the same time the collapse of Bunsen’s hypothesis left for the time being no general theory of rock formation and genesis in its place, Durocher’s liquation hypothesis n and Roth’s first suggestion of differentiation b attracting little attention. Petrographers were too busy collecting and assimilating the vast mass of facts discovered through the microscope to be able to devote much of their energies to theoretical studies. With the opening of the last decade of the nineteenth century, however, there arose an interest in the theoretical side of petrology in contradistinction to the descriptive petrography which had hitherto prevailed since 1870. This was started by the work of Lagorio, Teall, Rosenbusch, Brogger, Iddings, and others, and since that time analyses have occupied a more and more prominent place in petrological discussions. They are no longer ornamental adjuncts, but essential parts of most petrographical publications, on which much of the discussion hangs, and from which the most important conclusions are drawn. The crystallographic and optical properties of the constituent minerals and the details of texture are no longer the main subjects of investigation, but are finding their place with the chemistry of rocks and the broad and far-reaching studies based on this. The microscope is sharing the throne with the balance. This is as it should be, since exclusive attention to one aspect tends always to obscure the goal toward which all science is striving—the understanding of the “how” and the “ why” of things as they are—by temporarily setting up objects of interest of subsidiary importance. These subsidiary aims all have their use in advancing the progress of the science, but it must not be forgotten that they some¬ times lead into very devious paths, often of overspecialization, and that it is by keeping our forces moving forward together along all the lines of approach that we shall most quickly and surely reach our destination. THE CHARACTER OF ROCK ANALYSES. GENERAL CONSIDERATIONS. With the growing interest in rock analyses it is of the utmost importance that they be used intelligently, not onty as to their application in theoretical discussions, but, which is of especial interest here, as regards a just appreciation of their character and applicability to the purpose in view. It is a somewhat surprising and, it must be said, a rather saddening fact that the critical judgment of petrographers in general as regards rock analyses seems aDurocher, Ann. des Mines, Vol. XI, 1857, p. 217. b Roth, J., Gesteins-Analysen, 1861, p. xix. 14 CHEMICAL ANALYSES OF IGNEOUS ROCKS. to be in abeyance or wholly lacking. There is among them now, as there seems always to have been to some extent, a tendency to place implicit confidence in the results of analytical work—to accept readily whatever figures the analyst may furnish, with scarcely ever an attempt at a critical estimate of the worth of the analysis or a comparison of it with the chemical character of the rock itself as revealed by the microscope. It seems to be taken for granted by nearly all petrog- raphers that the analyst, like the proverbial king, can do no wrong. This applies, not to the personal good faith of the analyst, but to the analytical processes which, possibly because they belong to one of the exact sciences, are for the most part tacitly assumed by the petrographer to be infallible. It is noteworthy that this attitude of mind obtains, not only among beginners, but among the foremost workers in the science. There are, it is true, some instances of the application of expressed criteria in the selection of analyses in well-known papers, but in all these cases the criteria applied are few, and quite inadequate to the purpose, being confined, for the most part, to the freshness of the robk. In few cases does there seem to be any recognition of the difficulties and uncertainties of analytical work or any practical acquaintance with its methods. It goes without saying that this way of regarding analyses is totally at variance with the best interests of the science. Analyses constitute the basis of much of the investigations and discussions with which petrographers and petrologists must occupy themselves, and it is surely not the part of wisdom to erect elaborate structures on foundations of wdiose stability and careful workmanship we are not assured. It will be time saved in the end, and the superstructure, however well built in itself, will have a far better chance of withstanding the ravages of time and the attacks of critics if all the rotten and unsound blocks in the foundation are removed and onl} T the best and strongest of material retained. A consequence of this unquestioning confidence in the results of analytical work is that it is often intrusted to a student in chemistry, one with little or no experience in the analysis of rocks, and with no appreciation of the complexities and difficulties inherent in this department of quantitative analysis. That the results furnished by such inexperienced, and to this extent incompetent, analysts should be received with the greatest caution, is a truism to anyone acquainted by actual experience with the difficulties and dangers of rock analysis. But Hillebrand a and Pirsson b have expressed so clearly and concisely the views which I hold that I can do no better than refer to them. It is certainly remarkable and significant that in petrography alone of all the sciences the most difficult and intricate work is intrusted to novices, and that their results are accepted by nearly all with the same confidence that is given to the work of an experienced person. a Hillebrand, W. F., Bull. U. S. Geol. Survey No. 148, 1897, p. 16. 6Pirsson, L. V., Twentieth Ann. Rept. U. S. Geol. Survey, 1900, Pt. Ill, p. 578. CRITICAL VALUATION OF ANALYTICAL WORK. 15 This general laxity among petrographers as regards the quality of rock analyses is only too painfully evident in the present collection. There is to be found an astonishingly large proportion of poor work, much of it of such a character that it would seem that even a tyro in analysis would reject it as hopelessly inadequate for use. Analyses are given with summations over 103 or below 98. Analyses of leucite- basanite exist so low in alkalies that 10 or more per cent of quartz must be present, even though in the calculation all the potash is assigned to orthoclase and all the soda to albite. Analyses of rocks rich in olivine are found which show 30 per cent of alumina and only small amounts of ferrous iron and magnesia. In certain cases of alkalic rocks the alkalies have not been separately determined. Rocks with abundant segirite contain no ferric iron, and those with sodalite no chlorine, to judge from the figures furnished. Indeed I may say that some of the most depressing hours of my life have been those spent in collecting and arranging the ‘‘poor” and “bad” analyses here given, especially those grouped together in Part II of the collection. They represent a vast amount of misdirected and wasted energy, and, in man} 7 cases, have served as foundations for much logical and other¬ wise excellent reasoning, which has been almost wholly vitiated by the worthlessness of its basal data. This would often be ludicrous were it not pathetic. The publication and general acceptance of all this worthless analytical matter reveals the weakest side of petrography, and goes far toward showing why, up to the present, no classification of igneous rocks based on purely chemical or quanti¬ tatively mineral characters has been proposed, or would be likely to receive the general assent of petrographers. The chief reason for this low standard of criticism on the part of petrographers as regards analysts and analyses would seem to be that, while all of them are neces¬ sarily conversant with chemistry from the'theoretical side, few have much knowledge of the theory of quantitative analysis or much experience in its methods. The fact is not generally recognized that the complete and adequate analysis of an igneous rock is one of the most complex and, in some respects, one of the most difficult problems of analytical science, far beyond the capabilities of a novice, and demanding not only chemical knowledge and manipulative skill, but often the exercise of considerable judgment derived from experience in solving the perplexing problems which may present themselves." With the greatly increased importance of chemical analyses at the present time, it can justly be considered that the ability to make an accurate and fairly complete chemical analysis of an igneous rock should form an essential part of the training and equipment of every petrographer. It is only by such knowdedge that one is able to judge at first hand of the true value of an analysis, to see where errors have aCf. Hillebrand, op. cit., p. 16. 16 CHEMICAL ANALYSES OF IGNEOUS ROCKS. possibly crept in, and to discriminate between what is good and worthy of use and what is bad and to be rejected. In view of this state of affairs it will be pertinent to discuss at some length the qualifications which go to make a good analysis, the theoretical and practical criteria by which analyses may be judged, and, in a rough way, the estimation of the weight which may be allowed any given analysis in theoretical discussions. Indeed, one of the main objects of the present publication is to call the attention of petrographers in general to this state of affairs, so that they may realize more clearly the pressing need for reform and the necessity for a just appreciation of the value attaching to good analytical work and of the dangers incident to the use of poor analyses. There is undoubtedly at the present time a marked improvement in this respect, but so many recent instances of lack of judgment or criticism in the publication of analyses might be cited that the need is apparent, even now, for a free discussion of the subject. I realize fully that this is a delicate task, and difficult, if not impossible, to do without causing ill feeling. This difficult}" is, of course, inevitable in any discussion involving the frank statement of weaknesses or errors. I have therefore endeav¬ ored to make the discussion as impersonal as possible, though some references as illustrations have been unavoidable. Fortunately, having myself done considerable analytical work, I can only too often cite my own analyses as instances of what is to be avoided. REPRESENTATIVENESS. CHARACTER OF THE ROCK MASS. An analysis of an igneous rock is of value in direct ratio as it fulfills two con¬ ditions: that the specimen analyzed is representative of the rock mass, and that the analysis itself is accurate and complete in its determination of the constituents present. We may consider these two factors in the order stated. The representative character of the specimen depends partly on the character of the rock mass and partly on the amount of material taken. If the mass be uniform, or if a single uniform facies be the object of investiga¬ tion, two courses of procedure are possible. A single representative specimen from one locality may be selected for analysis, or pieces of several specimens collected from different parts of the mass may be taken, pulverized, and mixed, and the analysis made of this mixture. Of these the latter labors under the disadvantage that a check by means of reexamination by others will be impossible, and, furthermore, the uncertainty will always exist that the mixture of several specimens really represents the composition of the whole better than does a single specimen. In the great majority of cases it is by far the best plan to select a definite locality, preferably one which is of a permanent nature and not likely to be lost CHARACTER OF ROCK MASS. 17 through building or other operations, the rock of which can be considered repre¬ sentative of the whole mass, and make the analysis of a specimen from this. If there should be doubts as to the general uniformity of the whole mass, it is better to make several analyses from different parts, even though this involves con¬ siderably more analytical labor, since a much more detailed knowledge is thus gained, and important features which may otherwise be overlooked may be rendered evident. In the case of a heterogeneous mass, such as a stock or dike with marginal facies, it is likewise always the wisest plan to have separate analyses made of the different facies, even though the determination of the character of the mass as a whole be the only object in view. The decision as to the representative character of the specimen selected must be left to the collector, and it would seem natural that a petrographer who had the analysis of a rock in view, or who thought the results might be of value, would carefully consider this question in the field and select his material according^. The evidence is conclusive, however, that the specimen analyzed has often been collected with no reference to this point, this fact greatly diminishing the value of the analytical work afterwards expended on it. In connection with this subject the question naturally arises whether rock masses are indeed so uniform in character that any single specimen will be truly represen¬ tative of the whole, and whether specimens from different parts of an apparently uniform mass, even if close together, may not differ widely in composition. A full treatment of this fundamentally important topic is impossible here, but the outcome of such a discussion would be that, though the latter statement undoubtedly applies in the case of modally or normatively (but not texturally) eutaxitic or schlieric masses, yet a rock mass which is megascopically and microscopically uniform will furnish, by proper selection, specimens that, if examined by two or more competent analysts < and by reliable methods, will jdeld results that are sensibly identical. In other words, in the terms of the new classification, they would fall in the same subrang, or very close to the same border line. No investigation appears to have been made specially to decide this point, but a number of examples are furnished by the present collection which bear out the conclusion stated. Among them may be mentioned the analyses of the Butte grano-harzose-amiatose (granite) (Nos. 1, 2, and 3), the phyro-miaskose (phono- lite) of the Black Hills (Nos. 8 and 9), the grano-essexose (essexite) of Salem Neck (Nos. 2 and 3), the phlegrose-nordmarkose (solvsbergite) of Coney Island (phlegrose No. 4 and nordmarkose No. 3), and the liparose (keratophvre) of Marblehead Neck (Nos. 12 and 13). 14128—No. 14—03-2 18 CHEMICAL ANALYSES OF IGNEOUS ROCKS. The specimens should, of course, be taken from fresh, unaltered rock, since omy thus do they represent the chemical character of the magma. In some cases, how¬ ever, absolutely fresh material is not to be had; but if there be more than a very slight degree of alteration an elaborate analysis is not called for. All that we can hope to obtain from an analysis of such a rock is a general idea of its magmatic character, and while the determination of the main constituents should be made with accuracy, it will scarcely be worth while to determine the minor ones, unless for special purposes, such as the study of rock-weathering. If the alteration is slight the proportions of the main oxides will not be veiy much changed, but those of the minor ones will be relatively much more so. AMOUNT OF MATERIAL. The determination of the amount of material that will adequately represent the mass is a matter of great importance and deserves the careful consideration of the petrographer and the analyst. For actual analysis at least 10 grams of pulverized rock should be available, but, in view of the possibility of the redetermination of some or all of the constituents or the determination of some for which large por¬ tions are needed, it is well to have 20 or 30 grams.® No definite rule can be laid down as to the amount that should be taken, which depends on the granularity of the rock and whether it be porphvritic or not. In the case of fine- or medium-grained aphanitic or glassy rocks, which are not porphyritic or are only finely so, a few chips, amounting to 30 or 10 grams, will be quite sufficient. Of coarse-grained rocks, or those which are coarsely porphyritic, much more will be needed, the amount being dependent on the coarseness of grain. For nearly all ordinarily coarse-grained rocks, or those in which the phenocrysts are less than an inch in diameter, an ordi¬ nary small hand specimen, or even a smaller fragment, will be quite sufficient, the size being determined by the judgment of the petrographer. When the rock is abnormally coarse, as in some pegmatites, nephelite-syenites, etc., much more must be taken, often several pounds. In some rare cases a large rock surface must be measured to determine the relative amounts of the various minerals, and proportion¬ ate amounts of these must be taken and mixed for analysis. This last possibility, fortunately, is of rare occurrence, and an analysis made of such material must be regarded as only approximate at best. When more than 30 grams or so of material is used it is not necessary to pul¬ verize the whole, for a sample may be obtained by making successive crushings and quartering, as in assay work. Care must be taken to do this properly and system¬ atically, according to methods given in any treatise on assaying, and reference may be made here to a paper by Mr. S. A. Reed, which discusses the theory of the matter. 6 «Cf. Hillebrand, Bull. U. S. Geol. Survey No. 148, 1897, p. C3. i> Reed, S. A., School of Mines Quart., Vol. VI, 1885, p. 351. ACCURACY OF ROCK ANALYSES. 19 It should be noted that the whole of the small amount of chips or sample obtained by quartering- must be pulverized and used for analysis. The rock-making minerals ditfer so greatly in brittleness that if only a portion of the sample be pul¬ verized this will not represent the true average composition, for the more brittle minerals, as quartz and the feldspars, will be first reduced to powder, while the tougher ones, as hornblende, pyroxene, and biotite, will take more crushing and grinding. If, therefore, the last portions, which do not pass easily through the silk sieve, are rejected, the analysis will show a slightly more salic composition than exists in fact. On the other hand, owing to the same fact, the fine dust lost during the opera¬ tions of crushing, sifting, and grinding will be composed chiefly of salic minerals, so that, strictly speaking, all rock analyses are slightly more femic than they should properly be, though the error must be of very slight importance.® At any rate, it seems to be unavoidable. MICROSCOPICAL EXAMINATION. A microscopical examination of the rock in thin section should always precede the chemical analysis. This not only reveals clearly the character of the rock as regards general composition and freshness, but often furnishes invaluable indications as to what minor constituents, such as ZrO,, P 2 0 5 , SO s , Cl, etc., are present. The petrographer can thus indicate to the analyst which of the minor constituents are to be estimated and those for which it is not worth while to look. Some of the main analytical processes may also be modified and shortened by a knowledge of the general character of the rock, and in both these ways a great amount of useless labor will often be saved to the careful and thorough but nonpetrographical analyst, who, in the absence of such indications, may spend much time looking for constituents which are absent, in the conscientious endeavor to have his analysis complete. ACCURACY. Assuming that the sample analyzed is representative of the rock mass, the degree of correspondence between the figures yielded by the analysis and the true compo¬ sition of the rock is dependent on two factors—its accurac} 7 and its degree of completeness. By accuracy is meant the degree of precision with which the constituents sought for have been determined, quite apart from the fact whether or not all those present have been determined or separated one from another. The accuracy of an analysis, a The only instance known to me where this has been especially investigated is that in S. Zaleski’s study of the amount of quartz in granites (Tschermak’s Mineral. Mittheil., Vol. XIV, 1895, p. 350). He shows by determinations of silica that the dust produced in the pulverization of granites is notably richer in feldspar relatively to. quartz and dark minerals than the coarser portion of the powder. 20 CHEMICAL ANALYSES OF IGNEOUS ROCKS. which may be discussed apart from its completeness, depends on the personal ability of the analyst to make the analysis and on the reliability and adequacy of the meth¬ ods employed. The factor of the analyst has already been touched on in speaking of the practice of entrusting rock analyses to students, and the obvious truth that the personal factor is a most important one in the making of analyses need only be stated here. Thus the work of a trained and experienced man will be, presumably, of far higher character than that of a beginner publishing his first analyses in an inaugural disser¬ tation, or that of a student in chemistry to whom the analysis of a rock has been given for practice. It is true that the man of experience may not be a good analyst, or may be hampered by poor methods or reagents, and conversely the work of the beginner may be, and often is, of very good quality; but the fact remains that the latter will not carry the weight of the former, in the absence of confirmation of its character by other evidence. The employment of the most reliable and accurate methods is, of course, essential to good analytical work. As, however, this is not intended to be a treatise on the analysis of rocks, the matter can be only briefly touched on, for the especial purpose of pointing out to the nonanalytical petrographer some of the more common pitfalls and sources of error that beset the path of him who undertakes the analysis of rocks. In view of the wide experience of the chemists of the United States Geological Survey, and the unequalled, uniformly high standard of excellence shown by their work, it may be recommended that the methods adopted by them/' should be employed whenever possible, at least until improvements on them, or better methods, shall have been devised. Too high commendation can scarcely be bestowed on their analyses, especially the later ones, which stand in a class apart from almost all others, as a study of the material here collected will render evident. POSSIBLE ERRORS. The fact must not be lost sight of by petrographers unacquainted with quanti¬ tative analysis, that in certain portions of the processes, especially in the older methods, there is liability to serious error, due either to inherent defects or to the necessity for special care in manipulation, such care as is possible only with a careful and experienced analyst. The most prominent of these sources of error will be briefly stated. Liability to error attends the determination, not only of the minor constituents, where it is generall} T of comparatively small moment, but unfortunately that of most of the main and most abundant chemical rock constituents, in which case it becomes a matter of the utmost importance. The more important determinations which we «Cf. Bulls. U. S. Geol. Survey Nos. 148 and 176. \ POSSIBLE ERRORS. 21 may discuss are those of SiO.,, AL0 3 , Fe,0 3 , FeO, MgO, CaO, the alkalies, Ti0 2 , P„0 5 , and MnO. In regard to silica, Hillebrand® has clearly shown that the methods usually employed do not yield accurate results, but that two or more evaporations alternating with tiltrations, together with prolonged ignition over the blast, are necessary. He points out the fact that this 4 ‘ may serve to explain in small part the excessive sum¬ mations often encountered in rock analyses.” It is also shown that silica is not wholly thrown down bv ammonia or sodium acetate along with the aluminum and iron, and that it is appreciably soluble in melted potassium pyrosulphate. Increase in the apparent amount of alumina, due to imperfect separation of mag¬ nesia, is probably the error of considerable magnitude most commonly met with in rock analyses, especially in those of femic (basic) rocks. It arises from the fact that magnesium hydroxide tends to fall down with aluminum hydroxide on precipitation with ammonia. This can be prevented only by the presence of sufficient ammonium salts and by repeated precipitations, either with ammonia alone or with sodium acetate as well. These conditions are easily neglected by the inexperienced analyst, and, in com¬ piling the present collection, I have noted so many instances where this error has certainly been made, and so many others where it is strongly suspected but not definite^ provable, owing to the insufficiency of the petrographic description, that I must add my word of warning to those of Hillebrand 6 and Pirsson. c In regard to the determination of ferrous iron, Stokes^ has shown that ferric sulphate exerts a marked oxidizing effect on pyrite, and starting from this fact Hillebrand* demonstrates the unreliability of the Mitscherlich method, commonly employed in Europe for the determination of ferrous iron, i. e., decomposition with sulphuric acid in a sealed tube. This gives often, especially in rocks rich in iron, too high results for FeO, and decomposition by hydrofluoric acid in an atmosphere of carbonic acid is to be preferred. It must be noted, however, that in the hands of inexperienced analysts the latter method, as well as the former, is liable to give low results for ferrous and correspond¬ ingly high figures for ferric iron, in consequence of the partial oxidation of the former, due to careless manipulation. This error is the undoubted explanation of a number of anomalously high figures for ferric iron to be found in the collection, for these do not accord with what can be discovered about the mineralogical composition as revealed by the descriptions. rtBull. U. S. Geol. Survey No. 176, 1900, p. 52, and Jour. Am. Chem. Soc., Vol. XXIV, 1902, pp. 362 et seq. &Hillebrand, Bull. U. S. Geol. Survey No. 176, 1900, p. 55. ePirsson, Jour. Geol., Vol. IV, 1896, p. 688. d Stokes, H. N., Bull. U. S. Geol. Survey No. 186, 1901. f Bull. U. S. Geol. Survey No. 176, 1900, p. 89. 22 CHEMICAL ANALYSES OF IGNEOUS ROCKS. Another possible error in the determination of the iron oxides, and one which may be easily made by the novice, is that involved in the reduction of the solution of the precipitate by ammonia water for the determination of total iron. If the current of II„S is not continued for a sufficient length of time, the ferric sulphate will not be completely reduced to the ferrous state, so that the apparent amount of ferric oxide will be too low and that of alumina correspondingly too high. This will not, of course, affect the ferrous iron, as this is always determined in a separate portion. The error involved in the liability of magnesia to be precipitated in part with the alumina, which has already been touched on, will lead to too low figures for this constituent. Another error in the determination of this oxide, though in general of less magnitude and importance, is that involved in its precipitation as ammonium mag¬ nesium phosphate. Gooch and Austin® have shown that under the conditions usually obtaining in this determination there is a strong tendency toward high errors on the side of apparent increased amount of magnesia, owing to the presence of excess of the precipitant, ammonium salts and free ammonia. Since this error is due to the fact that, under these conditions, the ammonium magnesium phosphate contains more P 2 0 5 than is called for by the ideal constitution, it will not affect other constituents, but will be positive in its effect, and thus raise the summation of the whole analysis. It is possible that this may account in part for some of the curi¬ ous, slightly high summations met with in what are apparently otherwise excellent analyses. A source of error in the determination of CaO, of possibly frequent occurrence, is that involved in the use of ammonia water that is not fresh. The solution is then likely to contain a notable proportion of ammonium carbonate, which w r ill cause the precipitation of part of the CaO as carbonate along with the alumina, etc. This will be weighed with these, which will increase the apparent amount of Al 2 0 3 , and decrease that of CaO by the same amount. In regard to the determination of the alkalies, I need only add a word in confir¬ mation of the view expressed by Hillebrand 6 as to the advantages of the Lawrence Smith method, both as to accuracy and as to time saved. The slight correction necessary for the minute amount of alkalies present in the calcium carbonate used is a constant one, easily and safely applied, while, on the other hand, any of the other methods of decomposition involving the preliminary separation of alumina, iron oxides, lime, and magnesia introduces a large element of uncertainty and possible error, owing to the impurities contained in the reagents and taken up from the glass vessels. «Gooch, P. A., and Austin, M., Am. Jour. Sci., Vol. VII, 1899, p. 197. &Bull. U. S. Geol. Survey No. 170, p. 90. COMPLETENESS. 23 The colorimetric method for the determination of TiO.,, described by Hillebrand, is by far the most accurate and the quickest, and should be uniformly used, since the older methods, based on its precipitation by prolonged boiling, are very uncertain unless the'conditions are very exactly adjusted, especially when much Ti0 2 is present, in which case it is very liable to be contaminated by Al.,0, and Fe 2 0 3 . The assump¬ tion which is sometimes made, that the residue left on evaporation of the silica with hydrofluoric acid represents all the Ti0 2 present, is quite unwarranted, since this residue contains only part of the TiO s at most, and also some A1 2 0 3 , Fe 2 0 3 , P 2 0 5 , etc. In cases where the separation of alumina, etc., has been made by the sodium- acetate method, for the more complete separation of MnO, it must be remem¬ bered that, unless the amount of acetic acid present and the general conditions are very exactly controlled, there is great danger of incomplete precipitation of alumina at this stage. The A1 2 0 3 not precipitated here will subsequently be thrown down with the MnO and weighed with it, rendering the figures for this oxide too high and those for alumina correspondingly low. This error is one of comparatively frequent occurrence, judging from the abnormally high amounts of MnO often stated as present, and is one especially liable to be made by the inexperienced analyst. For this reason it would be preferable, unless the analyst has had experience in the sodium-acetate method, to precipitate the alumina, etc., with ammonia several times rather than use the sodium acetate-method, even though the precipitation of MnO be less complete, since the error involved in the determination of MnO is of far less importance than that possibly affecting the A1 2 0 3 . COMPLETENESS. The ideal analysis should show the percentage amount of every constituent present, and, for practical purposes at any rate, all those that are present in amount sufficient to make their determination a matter of interest, or whose presence or absence bears on the problem for which the analysis is made. The amount which may make a constituent worth determining will vary, of course, in different cases, as will the number of constituents to be sought for. Thus in such simple rocks as most liparases (granites, rhyolites, etc.) and labradorases (anorthosite) it is not necessary to determine such a number of constituents as should be determined in the case of miaskares and rocks belonging to the dosalane and salfemane classes. But in view of the facts that an analysis should be truly repre¬ sentative of the composition of the rock, that it may, if complete, be of use to others for the discussion of problems other than the one immediately in hand, and the general proposition that only good work should be countenanced in science, every analysis should be as complete as it is practicable to make it. 24 CHEMICAL ANALYSES OF IGNEOUS ROCKS. MAIN CONSTITUENTS. It goes without saying- that in every rock analysis worthy of the name all the usual main constituents must be determined. These will include silica, alumina, ferric and ferrous oxides, magnesia, lime, soda, potash, and water. Unfortunately a large number of analyses exist in which the iron oxides have not been separately determined, but are given together, as either Fe 2 0 3 or FeO, or most equivocally bracketed opposite both of these. Unless the iron oxides are present in very small amount, e. g., less than 1 per cent, or unless the presence of a considerable amount of pyrite or pyrrhotite makes the determination of FeO very uncertain, this is a quite unpardonable proceeding, since the proper separate determination of these two is essential to the complete chemical discussion of the rock magma and the calculation of the mineral composition, either normative or modal. This, with the error involved in the separation of alumina and magnesia, is the most common defect in rock analyses, and a surprisingly large number have been rejected from Part I of the tables on this account. The alkalies are occasionally estimated together (as Na 2 0), or determined by the difference from 100 per cent. This procedure is found especially in analyses of the more femic rocks, but sometimes in those of rocks in which the alkalies amount to several per cent. This is also a form of slovenliness for ivhich there should be no excuse, except in rocks composed largely or entirely of such minerals as olivine, magnetite, and ilmenite, when the alkalies can be present only in traces at most. The molecular weight of orthoelase and albite is so high® that in any chemico- mineralogical system of classification, or in the calculation of the mode, the deter¬ mination of both of these oxides is of the greatest importance. Furthermore the assumption is made that the sum of the analysis will be exactly 100 per cent, which is quite unwarranted in view of the great rarity of this occurrence, and especially when the chemist thinks so little of his work as to be unwilling to determine the alkalies properly. In some highly salic or highly alkalic rocks MgO and CaO are not determined, but are given as “traces.” While in most of these cases their nondetermination will not seriously affect the results of calculation, yet such a procedure is to be deplored as being not first-class work. The term “trace” should indicate strictly and uniformly that the constituent has been looked for and found, but in unweighable amount (0.1 milligram or less), while if it is not looked for because it is supposed to be present in small amount, some such phrase as “present, not determined” (p., n. d.) should be employed. The limits assigned to the term “trace” vary widely, and in the collection may be found instances where this term is used of constituents that are certainly present to the extent of half of 1 per cent or much more. a One per cent of K 2 0 corresponds to 5 per cent of orthoelase, and the same amount of Na«0 to 8 per cent of albite. COMPLETENESS. 25 MINOR CONSTITUENTS. Assuming that the eight main constituents are to be determined, we may take up the discussion of those usually regarded as “ minor.” Both Clarke® and Hille- brand b lay stress on the importance of their determination from the point of view of the solution of broad petrological problems. Thus the work of the chemists of the United States Geological Survey has demonstrated the comparative abundance and general distribution of titanium, barium, and strontium, and, in the case of barium, a greater abundance along the Rocky Mountain region than in the eastern and the extreme western parts of the United States. The frequent presence of vanadium in the more fernic (basic) rocks and of molybdenum in the more quaric (siliceous) ones, c of zirconium in presodic and especially nephelite-bearing rocks, and of nickel and chromium in very femie rocks, are other well-known instances of important contri¬ butions to our knowledge of rock magmas due to completeness in the making of analyses. Indeed, Hillebrand has entered such a strong plea for completeness in rock analysis that little more need be said to convince petrographers of the correctness of his position. Since, however, there is a strong tendency to regard as adequate for petrographical purposes analyses in which only the eight main constituents have been determined, further remarks, especially in elucidation of some special points, will not be amiss. It is obvious that when the rock carries notable amounts of minerals which con¬ tain as essential ingredients any of the “ minor” constituents, these should always be determined. Thus, Cl and SO s should always be included in the analysis of rocks with sodalite or noselite; Ti0 2 , when titanite, ilmenite, or titaniferous augite are present; P 2 0 5 , when there is any apatite, and Zr0 2 if there is considerable zircon or eudialyte. If these constituents are not determined the analysis will not show adequately the composition of the rock, or, as Clarke puts it, “the petrographer has been more thorough than the chemist.” It is for this reason that a microscopical study of the rock section should always precede the analysis. The conscientious chemist who is not a petrographer, and who, therefore, does not know what minor constituents are especially to be looked for, can only make sure of the completeness of his work by the determination of everything possible. While the results will alwaj^s be of value, } 7 et in many cases part of this labor may be quite unnecessary, involving a waste of valuable time which might be obviated if the petrographer would furnish with the material an indication of what minor substances are especially to be looked for. a Clarke, F. W., Bull. U. S. Geol. Survey No. 148, p. 11. Hillebrand, Jour. Am. Chem. Soc., Vol. XVI, 1894, p. 90; Bull. U. S. Geol. Survey No. 148, p. 17. c Hillebrand, Am. Jour. Sci., Vol. VI, 1898, p. 216. 26 CHEMICAL ANALYSES OF IGNEOUS ROCKS. Although the determination of all constituents, even those which are present in mere traces, is to be desired, yet in practice a compromise must be made, generally, between the degree of completeness and the time to be devoted to practical analytical work. The determination of most of the minor constituents takes considerable time, and, if the number of analyses to be made is great, or the time available is limited, it may not be advisable to determine all the lesser constituents, but only those essential to a proper understanding of the rock. This is especially true of the rarer substances, as Zr0 2 , Cr 2 0 3 , V 2 0 3 , F, NiO, CoO, CuO, SrO, etc., and S0 3 and Cl in rocks without the sodalite group of minerals. On the other hand, such constituents as Ti0 2 , P 2 0 5 , BaO, and S, which are now known to be commonly present and widely distributed, should be determined in every analysis which makes an attempt at completeness, as every modern analysis should. It is also general^ of importance to determine Cr 2 0 3 and NiO in the most femic rocks, especially when olivine is abundant, as they are apt to be present in very considerable amount. In discussing this matter, an important point to bear in mind is that the deter¬ mination of certain of the minor constituents affects the figures for other and often very important ones. This arises from the methods of analysis necessarily employed, in which several constituents are precipitated together in one operation, and subse¬ quently some of them separately determined, the figures for one being known by the difference. Of these by far the most important are Ti0 2 and P 2 0 5 . These are not only almost always present, often in very considerable amount, but their determina¬ tion affects that of the highly important alumina. In the course of the analysis AI 0 O 3 , Fe 2 0 3 , Ti0 2 , and P 2 0 5 are precipitated together, the three last are deter¬ mined separately, and the alumina is estimated by difference from the sum of the four, since so far no satisfactory method has been devised for its independent determination. It is obvious, therefore, that, if Ti0 2 and P 2 0 5 are not determined, the figure for alumina will be too high. In the case of all but the most salic rocks the error may be of great moment, since these two oxides may be present in a very considerable amount, and the alumina is the only measure we have for the calculation of the amount of anorthite—modal or normative—from the analysis. Similarly, the nondetermination of Zr0 2 ,, Cr 2 0 3 , and V 2 0 3 will raise the figures for alumina, since these are also precipitated together. In the great majority of rocks, however, the error will be negligible, owing to the minute quantities of these oxides usually present. Vanadium also affects the determination of ferrous iron, and, if presumably present in more than traces, it may be determined and a proper correction applied to the ferrous iron® in the most accurate work. Fortunately this will very seldom be necessary. a Hillebrand, Bull. U. S. Geol. Survey Xo. 176, p. 95. MINOR CONSTITUENTS. 27 As SrO is precipitated with CaO as oxalate, its nondetermination will render the apparent amount of CaO too high. As this substance rarely occurs in more than traces, this error is negligible for all but the most accurate investigations. Lithium chloride remains with the sodium chloride after separation of the potas¬ sium as platinichloride, but, so far, has rarely been found to be present in quantity great enough to warrant its estimation. The question as to whether MnO should be determined or not is a rather per¬ plexing one. Of course for the best work, and if the analyst is sufficiently experi¬ enced not to fall into the error possible in its determination by the sodium-acetate method already spoken of, it should be done. But, on the other hand, its determina¬ tion adds very materially to the time needed for the analysis, and involves as well the use of a method liable to an error which will affect seriously a much more important constitutent. Furthermore the long list of analyses made by the chemists of the United States Geological Survey, as well as those made elsewhere, show that, while almost always present, its amount is very small, in general little more than a trace. Thus in all the analyses of igneous rocks published in Bulletin 168 of the United States Geological Survey it only exceeds 0.50 per cent twice," and falls between 0.10 and 0.50 five times. 6 Indeed, it is of interest to note in this connection that Professor Clarke’s estimate of the average composition of the igneous rocks of the United States 0 shows that the amount of manganese in them is only about one-sixth of that of titanium, and is even less than that of phosphorus. In view of the great variety of igneous rocks represented by these analyses and of the very high character of the analytical work, the high figures so often found for this oxide in many other analyses are to be regarded with suspicion, the probability being that in them the error already spoken of has been made. That the nondetermination of MnO will affect the figures for other constituents is certain, but to what extent is not very clear. If the separation of Al 2 O a , etc., has been made with ammonia water, a small portion will be thrown down and be weighed as alumina. Part of that which passes through in the filtrate will be thrown down with calcium oxalate and weighed as CaO. But, as manganese oxalate is slightly soluble in water, some of the manganese will be thrown down as phosphate with the magnesia and weighed with this. Little is known of the various proportions of the manganese which will thus be distributed, and the matter is one which calls for investigation. It has seemingly been passed over in the text-books on quantitative analysis, owing to the assumption that the MnO is separated in the regular course before the precipitation of CaO and MgO. a 0.93 in A, p. 81; 0.70 in F, p. 212. 0 0.45 in C, p. 169; 0.43 in D, p. 161; 0.41 in E, p. 214; 0.40 in E, p. 20, and A, p. 147. c Clarke, Bull. U. S. Geol. Survey No. 168, p. 15. 28 CHEMICAL ANALYSES OF IGNEOUS ROCKS. At any rate, in view of the small amount of this substance present, its probable distribution among several constituents, thereby affecting each of them only to a negligible extent, and the loss of time and possibility of error affecting A1 2 0 :J involved in its determination, it may be held that the determination of MnO is not essential or called for. even in what is otherwise very complete and accurate work. In regard to the determination of H 2 0, I am in accord with Dittrich® and Hille¬ brand, 6 that the rock powder for analysis should be air dry, and that it is advisable (though not necessary) to discriminate between combined and hygroscopic water, i. e., that driven off above and below 110°. The remarks of Hillebrand on the inadvisability of the method for the determination of H 2 0 by “loss on ignition” will be concurred in by every experienced analyst who has considered the matter. Except where minerals containing water or hydroxyl, as analcite or muscovite, are present as primary components, the determination of H 2 0 is not a matter vital to proper comprehension of the rock magma, but its amount, as well as that of C0 2 , is of very great importance as a measure of the freshness of the rock. The deter¬ mination of water, therefore, must be regarded as essential to every rock analysis, and that of C0 2 also when the presence of calcite or cancrinite or the altered condi¬ tion of the rock demands it. In this connection a common practice may be briefly alluded to, namely, that of deducting H 2 0 and CC) 2 when the rock is not fresh, calculating the remainder to 100 per cent, and assuming that the result represents the composition of the original, unaltered rock. This assumption is quite unwarranted and is apt to lead to total!}' erroneous conclusions, since the processes of weathering or alteration do not usually consist in the simple addition of H 2 0 and C0 2 . but in the assumption of these con¬ comitantly with changes, either additive or subtractive, in some or all of the other components. And as yet we are unable to determine these with any degree of success. Furthermore, such a procedure, like that of any recalculation to 100 per cent, unless the original figures are given, deprives others of one of the best methods of judging of the value of the analysis, by concealing the original summation. RATING OF ANALYSES. We have hitherto considered rock analyses from the point of view of the analyst. It remains to discuss them from that of the petrographer who wishes to use the results, and who therefore needs to have some means of judging as to their reliability. For this purpose it is necessary to discuss the features of an analysis on which this judgment may be based, and it will also be convenient to formulate a method by which the general character of an analysis may be expressed concisely. This expression of the relative worth of an analysis may conveniently be called its “ rating,’ in analog}' with that of commercial houses. i Dittrich, M., Mittheil. Badischen Geol. Landesanst., Vol. Ill, p. 79, 1894. b Hillebrand, Bull. U. S. Geol. Survey No. 148, 1897, pp. 26 et seq. RATING OF ANALYSES. 29 The user of the analysis must rely on the judgment of the collector and the analyst that the specimen, both as to locality and size, correctly represents the rock mass, unless some reason appears to the contrary. It rarely happens that the analysis in itself gives any indication as to this point, at least in a decisive way. The special case of the analysis of the groundmass of a rock is, however, not uncommon, and may be briefly discussed. For the general purposes of petrography such analyses are of little use, and they have been excluded from the present collection. On the other hand, for the solution of certain special problems the} T may be of great value. It must be pointed out, however, that an essential adjunct to their use is a knowledge of the relative amounts of the phenocrysts and the groundmass, unless only a knowledge of the composition of, for example, glassy or. microaphanitic groundmasses be desired. If the purpose is the study of the order of crystallization, or some such thing, a knowledge of the quantitative relations is indispensable. Unfortunately, this knowledge is wanting in every case, so far as my knowledge extends, quantitative relations being given only in the cases of analyses of the por¬ tions soluble and insoluble in acid. This is only another phase of the prevailingly qualitative way of regarding petrographical problems. It can scarcely be reiterated too often that the science of petrography must become quantitative if it is to make real and certain advance. The time has passed when a simple statement of the minerals composing a given rock, with a description of their physical properties, will suffice. We need to know in addition the relative amounts of the minerals as accurately as may be, with their chemical composition, as well as that of the rock itself, derived either from chemical analysis or from deter¬ mination of the quantitative mineral composition. Otherwise many of the broadest and most fundamental problems in petrology will be incapable of solution, and the science will still consist of vague gropings after the truth, because some of the most essential facts—the quantitative relations—remain neglected and unknown. ACCURACY. Assuming, therefore, that the analysis is representative as far as the material goes, we have its accuracy and its completeness as means of judging its value. The features on which this must rest, as far as accuracy is concerned, may be stated as follows: Internal evidence External evidence ((a) Agreement with the mode. I (b) Summation. '(c) Analyst. • (d) Methods of analysis. ( e ) Indirect evidence. 30 CHEMICAL ANALYSES OF IGNEOUS EOCKS. INTERNAL EVIDENCE. Agreement with the mode .—It may seem superfluous to state that the chemical analysis of a rock must accord with its quantitative mineral composition as determined by the microscope. That such a statement is necessary, however, study of the present collection, with the many discordant results it contains, will render clear. When the mode of a rock is known, this is the best basis for ascertaining whether the analyst has done his work well or not. Given the quantitative amounts of the minerals present and a knowledge of their composition, the chemical analysis can be easily checked by the calculation of the chemical composition from the miner- alogical data." The agreement need not be exact, and indeed seldom is except under the most favorable conditions, since the measurement of the amounts of the constit¬ uent minerals under the microscope can not be of the highest order of accuracy, and assumptions must often be made as to the chemical composition of some of them. But the result will usually be sufficiently accurate to show whether notable analytical errors have been made or not. In the great majority of cases, however, only the roughest kind of quantitative data are either given in the descriptions or conveyed by the present rock names, if indeed one is fortunate enough to have an} 7 kind of quantitative information as to the mineral composition vouchsafed him. Here one can detect only errors of a flagrant kind, and of magnitudes involving several per cent of certain constituents. In considering the possibility of any of the errors previously mentioned, the judgment of the petrographer, based on a knowledge of the chemical composition of minerals as well as on his knowledge of analytical work, must come largely into play. All the chemical features must be taken into consideration in connection with the description, especially in the absence of exact quantitative mineralogical data. Thus high alumina (e. g., 20 per cent or more) in a rock with less than 50 per cent of silica, and even with low magnesia, is not necessarily due to an error in the separation of alumina and magnesia. It may be caused by the nondetermination of Ti0 2 and P 2 0 5 , or by the presence in’abundance of anorthite or nephelite, which will be.indicated by correspondingly high lime or soda. Apparently high soda and low potash in a so-called orthoclase rock may arise from an imperfect description or identification of the feldspar, which may be in reality a soda-orthoclase. It must also be borne in mind that cases occur where the microscopical is seem¬ ingly at variance with the chemical analysis, and yet the latter is undeniably correct. This is especially true of very fine-grained holocrystalline or hypocrystalline rocks, and it will happen not infrequently that further, more critical, microscopical study will reveal a constituent which has been overlooked, but whose presence is manifest after the analysis has indicated its existence. «Cf. Jour. Geol., Vol. X, 1902, pp. 667 et seq. EXAMPLES <>E ANALYTICAL ERRORS. 31 An instance of this is the hornblende-phyro-essexose (kulaite) of Phrygia, investigated by the writer, i'll which the rather abundant nephelite was at hrst over¬ looked in the partly glass}' groundmass, and was discovered only when repeated careful chemical work and calculation of the mode showed that it was necessarily present . a Another well-known instance where the chemical analysis does not correspond with the microscopical character is that of the wyomingose and orendose of the Leucite Hills. 6 In the former, although modally the only salic, minerals visible are leucite and noselite, the analysis shows a large excess of silica. In the orendose there is an excess of alkalies over alumina, with excess of silica in one case. So far, these discrepancies have not been explained, though there can be no doubt of the high degree of accuracy and completeness of the analysis. But such occurrences are exceptional, and if no explanation is afforded by the description to account for the peculiarities of the analysis we may, in general, assume that errors have been made, and consider the analysis untrustworthy in this respect. In this connection it will be well to mention that the simple method of calcula¬ ting the norm of a rock, recently described, c is of veiw great use in checking an analysis. While apparently complicated, in the majority of cases it is readily and quickly effected. Then, with some knowledge of the relations of the standard and the alferric minerals, sufficiently close adjustments of the mineral molecules are easily made to permit a comparison of the mode with the analysis. It must not be forgotten, even here, that in the absence of a knowledge of the quantitative relations of the component minerals, very serious analytical errors may not be revealed by calculation of the mode, in this or an\ T other way, from the chem¬ ical data. The error in one or more constituents may amount to several per cent, and yet a mode can be calculated which will apparently agree with the description or with a qualitative microscopical examination. This is illustrated by the writer’s first analysis of the ciminite of Fontana Fies- coli, near Viterbo.^ The mode, as calculated from this analysis/ seemingly agreed with the microscopical examination, although subsequent investigation and analysis showed that the alumina and the magnesia were respectively too low and too high by about 3 per cent.-^ Although it is always an unwelcome task to point out mistakes, }^et the citation of some examples illustrating the more common errors may be useful. It must be a Washington, H. S., Jour. Geol., Vol. VIII, 1900, p. 611. b Cross, Whitman, Am. Jour. Sci., Vol. IV, 1897, p. 132. c Cross, Iddings, Pirsson, Washington, Jour. Geol., Vol. X, 1902, p. 644. d Washington, H. S., Jour. Geol., Vol. IV, 1896, p. 837. (■Idem, Jour.Geol., Vol. V, 1897, p. 354. /Washington, H. S., Am. Jour. Sci., Vol. IX, 1900, p. 45. 32 CHEMICAL ANALYSES OF IGNEOUS ROCKS. premised, however, that there is no desire to call attention to the mistakes of indi¬ viduals, but the possibilities of serious error, even among the best workers, will be pointed out. It is unfortunate that a few must be selected for this criticism, for, as a matter of fact, all are or have been thus culpable, so that no one petrographer can be held guiltless of errors in the use or making of analyses, or of lack of proper critical acumen in their selection in some cases; and from the application of these criticisms the critic is far from excluding himself. I trust, therefore, that those who are mentioned may pardon me for the disagreeable necessity to which I am put. As an instance of the error in the separation of alumina and magnesia, besides that given above, there maybe cited an analysis of the essexite of Rongstoek/ which shows 46.93 per cent of silica, 24.19 alumina, and 2.42 magnesia. Part of the high alumina is to be ascribed to titanic and phosphoric acids, which were not determined; but, even making due allowance for these, some of the magnesia has undoubtedly been weighed with the alumina. This is clear on comparison with two other analyses of the same rock mass published by Hibsch, * 6 which, with 50.50 silica, show about 17.85 alumina and 3.35 magnesia. The error will be even greater than is indicated by the difference between these figures, for the silica and other percentages of the analysis published by Lang make it certain that his specimen was more femic than those of Hibsch. As another instance of this very common error there may be cited the first analysis of the monchiquite of Shelburne Point/ which gave 18.06 A1 2 0 3 and only 1.12 MgO, although hornblende and olivine are abundant. Attention having been called to the manifest discrepancy/ it was reanalyzed by another chemist, with a result showing 15.87 A1 2 0 3 and 8.32 MgO. Although this second analysis is far from being above reproach, } T et it is sufficient to show that the greater part of the mag¬ nesia had been in the first analysis precipitated with the alumina. It is also almost certain that in the first the two chief errors had been made in the determination of iron oxides- that due to the partial oxidation of the ferrous iron in the course of its determination and that involved in the reduction of the solution containing total iron by insufficient treatment with H 2 S. The figures for the alkalies are also quite impossible, and indeed the only ones which have any semblance of probable correct¬ ness in this unfortunate instance are those for silica and lime. An illustration of the incorrect determination of the iron oxides, taking speci¬ mens of the rock as a basis of judgment, is furnished by the often-cited analysis of the syenite of Biella/ in which the ferric oxide is given as 6.77 and the ferrous as 2 .02. Here there is a large excess of ferric oxide over that needed for the maximum «Lang, H. O., Tschermak’s Mineral. Mittheil., Vol. XV, 1896, p. 191. 6 Hibsch, J. E., Tschermak’s Mineral. Mittheil., Vol. XV, 1896, p. 487. c Kemp and Marsters, Bull. U. S. Geol. Survey No. 107, 1893, p. 34. « ii Kemp, in Weed and Pirsson, Bull. U. S. Geol. Survey No. 139, 1896, p. 116. e Cossa, Mem. Ace. Sci. Torino, Vol. XVIII, 1875, p. 28. EXAMPLES OF ANALYTICAL ERRORS. 33 possible amount of magnetite or for the augitic molecule Fe 2 0 8 .(Mg,Fe)0.Si0 2 , with no hematite in the rock to account for it. We are therefore forced to conclude that a partial oxidation took place in the determination of FeO, resulting in the erroneous figures reported. A very striking example of the error due to incomplete precipitation of alumina by the sodium-acetate method in separating MnO is that of the quartz-syenite of Fourche Mountain, in Arkansas . a One analysis of this rock gives 13.45 alumina and 5.29 manganous oxide, while the other yields the figures, respectively, 18.15 and 1.00, the sum of the first pair being 18.74 and that of the second 19.15. Here it is very obvious that in the first analysis over 4 per cent of Al.,0. t has been weighed as “MnO,” while it is almost as certain that the l per cent of the second is too high from the same cause, since the rock is very largely felic (feldspathic), and no manganese-bearing minerals are mentioned as being present. Illustrations of error in the determination of the alkalies are furnished by a large series of analyses of Italian leucite-bearing rocks. Of these one may be cited of a leucite-melaphyre (leucite-basanite) of Monte Jugo, near Montefiascone, 6 which, with 48.30 silica and 15.07 alumina, shows only 0.94 soda and 1.73 potash. Of this holo- crystalline rock Klein says, “ Leucit und Augit walten in Gesteinsgewebe vor,” and the section of a specimen collected by myself at the small hill bears this out, as it indicates that leucite constitutes about 40 per cent of the rock. The amount of potash in the anatysis yields but 7.8 per cent of leucite, and is certainly far too low. This analysis and others of basanites of this region are so low in alkalies (especially potash) that, if they were correct, the rocks would necessarily carry up to 10 per cent of quartz, even on the assumption that all the bases took their highest possible quota of silica, yielding orthoclase instead of leucite and hypersthene instead of olivine. Many more examples of incorrect determinations could be cited, both of these and of nearly all other constituents, but the above must suffice to point out the impor¬ tance of close scrutiny of the analytical figures in conjunction with the mineralogical data. It may be mentioned that in none of the cases cited, and indeed in scarcely any case involving serious error to be found in the tables, has any misgiving been expressed at the time the analysis was published as to the possibility of error, or any comparison of the analysis with the mode, no matter how glaring and self-evident the incorrectness. Summation .—The summation of a rock analysis is often an important index to its character, and should always be taken into consideration in rating it. In regard to the summation consistent with good work, Hillebrand puts the matter very ((Williams, J. F., Ann. Rept. Geol. Survey Arkansas, 1890, Vol. II, 1891, p. 99. b Klein, C., Neues Jalirbuch fur Min., Vol. VI, 1889, p. 20. 14128—No. 14—03- 3 CHEMICAL ANALYSES OF IGNEOUS ROCKS. 84 clearly® in his remarks to the effect that a summation somewhat over 100 per cent is better than one below 100, and he also assigns the limits for good work as 99.75 and 100.50. With his reasoning and his limits 1 fully concur, though in practice one may be a little lenient and extend the limits allowable to 99.50 and 100.75 with advantage. While figures below or in excess of these limits are very good evidence of error somewhere in the analysis, the converse is not always true, that figures within these are proof of correct results. Several errors may, of course, balance one another, so that a summation very close to 100 will be yielded, although the analysis may be utterly worthless. At the same time, unless indications appear that the analysis is not a good one, it must be taken at its face value. A good summation must be held as evidence of good analytical work as far as it goes. On the other hand, as has just been said, very low or very high results are proof positive that that analysis is incorrect in some particulars, or possibly as a whole. A low summation may be due to the nondetermination of some constituent, to poor methods, to carelessness in manipulation, or to all combined. In connection with the first of these it may. be remembered that the determination of water by “ loss on ignition ” tends to }deld a low total, owing to the oxidation of the ferrous iron during the process. This will reduce the apparent weight of water and give an unfavorable summation, though the other essential constituents may have been accu¬ rately determined. It must also be borne in mind that a low summation can not be ascribed to the nondetermination of a constituent which is precipitated and weighed with others that have been determined, such as TiG 2 and P 2 0 5 with A1 2 0 3 , or SrO with CaO. If it is due to incompleteness, the missing constituent must be sought for among those which are determined independent^ in the course of the analysis, such as C0 2 , S0 3 , Cl, S, .or BaO. If the deficiency be marked and the description of the rock indicates that none of such constituents are present, the low summation must be held as evidence of error somewhere in the analytical work. It may also be noted in this connection that if ferric oxide is calculated as ferrous there will be a deficiency of one-ninth of its weight, due to the loss of oxygen, and the converse. Consequently, if the iron oxides are given only as FeO, the total of the analysis will be too low by one-ninth of the amount of ferric oxide really present. And conversely, if they are given as ferric oxide, the sum will be too high by one-tenth of the ferrous oxide. If the amount of either is considerable, as is usually the case in very femic rocks, the nonseparation of iron oxides may thus give rise to an apparently poor or an apparently good summation. In the case of analyses of rocks containing such minerals as sodalite, fluorite, much biotite or apatite, pyrite or pyrrhotite, in which Cl, F, or 8 has been deter- « Hillebrand, Bull. U. S. Geol. Survey No. 148, 1897, p. 62. SUMMATION OF THE ANALYSIS. 35 mined, it must be remembered that an equivalent amount of oxygen is to be deducted from the oxides of sodium, calcium, or ferrous iron, to arrive at a correct result. If the amount of these constituents is considerable, an apparently high summation may be found in reality to be perfectly satisfactory, while one which lies within the assigned limits may prove to be too low. In the case of a summation higher than that allowable, it is possible that this may be due to the determination of iron oxides as Fe 2 0 :! only, the excess being attributable to the excess of oxygen in this over that in FeO, as just explained. Or it may be due to the fact that no correction has been made for the oxygen equivalent to Cl, F, or S, also mentioned above. In the absence of these two possibilities, the high summation can be attributed onl} r to analytical errors, such as impure reagents, imperfect washing of precipitates, incomplete ignition, a dusty laboratory, and the like. No explanation based on incompleteness and the nondetermination of some constituent will apply here, and, if the excess above the allowable limit be at all considerable, the evidence of careless work is strong. Furthermore, in all cases of high or low summation, it must be remembered that the excess or deficiency can not be distributed among all the constituents, since “it is more than likely to affect a single determination.” a It must be borne in mind that the importance of the summation in rating an analysis lies in the fact that it is itself presumptive evidence of good or poor analytical work somewhere or all through the analysis. Thus, if the sum falls within fihe limits assigned for good work, the analysis is presumably good, provided that no marked discrepancy is evident between the analysis and the described mode, that the degree of completeness is satisfactory, and that there is no other evidence tending to throw doubt on the results. On the other hand, if the sum is considerably below or above these limits, the evidence is much stronger than the apparently slight departure of a fraction of 1 per cent from the limits might at first sight seem to indicate that some error or errors have been made, and that consequently the character of the analytical work as a whole is open to suspicion. Thus a low summation of 99.00 may be due to the nondetermination of some constituent. In the absence of evidence to this effect, we can only conclude that some error has been made. This departure of but half a per cent from the limit of the standard of good work may affect either the silica or the alumina, those constituents present in largest amount, and may not seriously affect the value of the analysis; or it may affect some constituent present in less amount, thus being relatively of greater influence; or it may be distributed among several constituents. We have no means of deciding in the vast majority of cases, but we a Hillebrand, Bull. U. S. Geol. Survey No. 148, p. 63. Cf. Appendix to Fresenius’s Quantitative Analysis. 36 CHEMICAL ANALYSES OF IGNEOUS ROCKS. must conclude that as the work is certainly incorrect, even to so small an extent, in some particular, it may be (and we are almost justified in assuming that it is) incorrect in others, and possibly all through. Summations somewhat above or below the normal limits are excusable in analyses of many minerals or of meteorites where the material available is scanty and the allowable possible limits of error are consequently considerably greater than where the material is ample, as is generally true of igneous rocks. It must also be remem¬ bered, in the case of minerals, that their analyses may be checked by their agreement with the known calculated chemical composition. In the case of rocks, on the other hand, we have, in the vast majority of instances, no such check, for adequately exact data as to the relative amounts of the constituent minerals are seldom given. If, therefore, the analysis of a rock is satisfactorily complete, there is no excuse, as Dr. Hillebrand remarks, for a summation that does not fall within the somewhat liberal limits here assigned. EXTERNAL EVIDENCE. Analyst .—Of the factors that may come under this head the analyst himself is the most important. For several reasons, however, this factor can be used only with great caution and as subsidiary to other criteria. That is, an analyst is to be judged by his work rather than the work judged by the analyst. While as a general proposition it may be said that the work of a beginner will probably not be so good as that of an experienced analyst, yet exceptions do occur; so that we must not be too sweeping in our judgment of the analyses of a student unless they show definite signs, of poor work. It may also happen that an experienced analyst turns out a number of analyses which are manifestly incorrect, probably owing to the employment of poor methods or reagents. In this case his long- experience will count for little, and a rock analysis made by him which can not be checked by comparison with the mode will be looked on with misgivings. Methods .—The methods employed are so seldom stated that they are not often available as a basis of judgment. When known, however, the petrographer who is experienced in rock analysis will be able to form an opinion of the value of the determinations affected by them. Indirect evidence .—Evidence of an indirect nature is sometimes afforded by analyses of the same or similar rocks by other analysts, which may either cor¬ roborate or discredit that under consideration. It may also happen, as mentioned above, that some analyses of a series show evident signs of error, when the presumption is strong that the others are also subject to the same error unless they can be checked by comparison with the mode. RATING OF ANALYSES. 37 COMPLETENESS. It is obvious that to express fully and accurately the composition of a rock the correct amount of each constituent present must be determined. It follows that, in general, the more constituents determined the more closely will the analysis represent the composition of the rock. This, however, is subject to the limitations that some rocks are of such simple composition that they contain only a few chemical constituents, and that the statement of figures for all constituents possibly present is by no means a guaranty that they have been correctly determined. Assuming, however, that the analysis is accurate, and that the rock is of more or less complex composition, as is usually the case, we may briefly discuss the relative importance of the various constituents in the rating of analyses. Speaking generally, and bearing in mind the possible occurrence of rocks containing large amounts of minerals usually regarded as rare or which are usually only sparingly present, it may be laid down that for the most satisfactory work every constituent should be determined which is present in greater amount than mere traces, as already defined, or the knowledge of whose absence or presence, even in minute quantity, is of importance to our study of the rock or to the object of the investigation. Th is will include the nine main constituents that are almost universally present and whose absence is a matter of great interest; that is, Si0 2 . A1 2 0 ;) , Fe 2 0 3 , FeO, MgO, CaO, Na a O, K 2 0, and H„0. The iron oxides should be separately determined, or the absence of one or the other should be shown, even in the case of the most salic rocks, though it must be borne in mind that the importance of this separate determination increases with increase of the femic components. Likewise, the alkalies should always be determined, of course separately, and even in the case of the most femic rocks their presence in traces or their complete absence should be definitely proved. CaO and MgO should also be determined, even though they exist actually as traces, as defined above. H 2 0 should, in general, be determined directly, and not by “loss on ignition,” but the distinction between that below and that above 110° is not usually essential, yet is always advisable. C0 2 should, however, be determined if the rock is not fresh. After these it is of next importance to know the amounts of the so-called minor constituents which are present in notable amount. This will include Ti0 2 and P 2 0 6 in nearly all rocks, except the most salic ones, Cl and SO :j in rocks rich in sodalite, noselite, or haiiyne, S in a good many femic rocks, Zr0 2 in rocks with nephelite, much eudialyte, or zircon, Cr 2 0 3 and NiO in many dofemanes and perfemanes, etc. Of course any one of these may at times assume the importance of one of the nine main constituents, as Ti0 2 in ores produced by segregation or differentiation, 38 CHEMICAL ANALYSES OF IGNEOUS ROCKS. Cl and S0 3 in such rocks as tailin'rite, tawite, and the hauynophyr of Melfi, P 2 0 5 in the apatite-syenites of Finland, or Cr 2 0 3 in many dunites. Coming- next to the constituents present in only very small amount, the most important are Ti0 2 and P 2 0 6 , especially the former. These are both almost always present, and are also of special importance because their estimation affects that of the highly important A1 2 0 3 , as already explained. In fact, on this account these two should always be determined if the analysis is to be considered a good one. MnO, although also nearly always present, is of comparatively little influence, and its w determination or not, for reasons explained above, should not be held to affect seriously the rating of the analysis. Of the other, generally rare or very minor, constituents, such as Zr0 2 , Cr 2 0 3 , NiO, BaO, SrO, little need be said. Except as they assume an important role, as already mentioned, they scarcely affect th'e value of an analysis for general purposes. Still, since they are or may be of great importance for the study of certain broad and as yet undeveloped problems, and as their determination, other things being equal, is evidence of careful and thorough analytical work, analyses in which they are reported must be rated higher than those in which they do not appear. RATING ADOPTED IN THE TABLES. We come now to the practical application of the foregoing remarks—that is, a concise expression of our judgment of the value of any given analysis, based on the features described. We have been accustomed to do this in a rough way by calling analyses good, or poor, or bad. But there seems to be a growing need of making these terms more precise, of defining their meaning more exactly. As a preliminary, the fact must be recognized that while the features discussed permit of a fairly accurate judgment in many cases, in others some or all of them are not available, and the analysis must be taken, so to speak, at its face value. Thus it frequently happens, especially with the prevalent almost purely quali¬ tative descriptions, that we can form no estimate of the correspondence of the analysis with the mode. In a gabbro, for instance, of which it is merely known that the constituent minerals are labradorite and augite, the analysis may show high A1 2 0 3 and low MgO. This may be due to the common error in the separation of these two; or again, it may be due to the fact that the rock is very salic, so that the anorthite molecule is very abundant and the alferric mineral present in small amount, though the rock would be called a gabbro, equally with a very femic one, in the present vague and qualitative systems. In the flrst case the analysis would not, and in the second case it would, correspond with the mode, and the analysis would be, respectively, either incorrect or correct. But in the absence of some evidence to determine the matter, such as an indication of the quantitative relations of the two minerals in the description, we should have no means of deciding tne question EATING ADOPTED. 39 provided that CaO was high enough, and if the analysis were otherwise good we should scarcely be justified in rejecting it on this account. We must also make the general assumptions, in the absence of evidence to the contrary, that the material analyzed is representative of the rock-mass, and that the analyst is competent and the methods employed reliable. Admitting these serious defects in the case of many present-day anal} r ses, and the fact that any such concise characterization is necessarilv to a large extent arbi- trary, I venture to propose, and have used throughout the collection, the following scheme as a practical method for the expression of the rating of analyses. The method is closely analogous to that of Bradstreet in rating the credit of mercantile houses in the United States, which, indeed, suggested the present form of the scheme. In commercial rating the credit of a firm is dependent on two factors—the amount of capital invested or at command and the personal character and reputation of the individuals. The rating or credit will be high as the personal character and the capital both approach the maximum. Following out this analogy, and leaving external evidence aside, our judgment of analyses is chiefly dependent on two factors—the accuracy and the completeness. For the purposes for which rock analyses are used each of these compensates or may replace the other to a certain extent. Thus if the analysis is not very complete, this fault may be partially compensated for by the accuracy of the determinations which have been made, and, conversely, if the accuracy of some of the determi¬ nations is not entirely satisfactory, a complete determination of all the constituents may partially make up for it. This, of course, within reasonable limits. Further¬ more, the higher the standard of each factor the more valuable will be the analysis. To express the degree of accuracy the letters A, B, C, D are used, and for the degree of completeness the figures 1, 2, 3, 4. These are used in combinations of a letter and a figure, the former preceding, since, in general, the degree of accuracy is of more importance than that of completeness. The bases on which these are assigned are as follows, the limitations and often the arbitrary character of the scheme being understood: A is used when the analysis gives evidence of the highest degree of accuracy, that is, when it corresponds well with the mode, and when the summation is between the limits 99.50 and 100.75. When the analyst is of the first rank and when the methods are known to be of the best, this is additional reason for the assignment of this letter. It must be understood, however, that in the collection I have carefully refrained from the use of the personal competence of the analyst in the assignment of ratings, as this is often a difficult, and always a delicate matter. So, with the excep¬ tion of a few cases where the methods or general results were known to be not very reliable or positively bad, I have used only the purely impersonal features of each analysis in deciding its rating. 40 CHEMICAL ANALYSES OF IGNEOUS ROCKS. B may be assigned when the analysis and the mode correspond and when the summation is between 99.50 and 99, or between 100.T5 and 101.25. Due allowance must, however, be made here as elsewhere, in the case of low summations, for the effect of the nondetermination of certain constituents, as already explained, and in the case of high ones for the correction to be applied in the presence of Cl or S. C applies when the analysis corresponds fairly well, or varies but little from the mode, or when the sum is between 99 and 98.50, or between 101.25 and 101.75. D is to be used when the analysis varies decidedly from the mode in any impor¬ tant particular, or when the sum is below 98.50 or above 101.75. It also applies when the methods for the determination of important constituents are known to be bad, or when an analysis, apparently good, is made up by combining parts or the whole of two or more poor analyses. 1 is assigned when the analysis is perfectly complete or nearly so, as when, in addition to all the main constituents and those of secondary importance, Zr0 2 , Cr.,0 3 , NiO, BaO, SrO, and the like, or several of them, are determined in rocks not con¬ taining notable amounts of minerals having these as essential components. In gen¬ eral MnO should be determined for this rating, but not necessarily so, and the same is true of the separate determination of combined and hygroscopic water, though the determination of water as ‘‘loss on ignition” renders this rating doubtful. The iron oxides should be separately determined in all cases to have this figure apply. 2 will be used when all the main constituents, including both oxides of iron, have been determined, as well as the constituents of secondary importance, including Ti0 2 and P 2 0 6 in nearly all rocks, Cl and S0 3 in those with abundant minerals of the sodalite group, and so on, as has been explained. The minor constituents, as Zr0 2 , BaO, etc., are not determined for this figure. 2 will also be used for analyses of salic rocks in which the iron oxides are present in small amount but have not been separated, and which are otherwise so complete as to fall under 1 . 8 applies to analyses in which the main constituents, including both oxides of iron, have been determined, but not Ti0 2 , P 2 0 5 , Cl, etc. (or the minor constituents), unless minerals rich in these are so abundant as to make their estimation of the same importance as that of the main constituents. 3 also includes analyses of rocks low in iron oxides, in which these have not been separated, but which are otherwise complete according to the requirements of 2 . 4 is to be assigned when, in all rocks except those very low in them, the iron oxides have not been separated, when the alkalies or other constituents are deter¬ mined by difference from 100 per cent, when the alkalies are not separated, when any constituent of the first importance is not determined, when the analysis has been made of ignited material (not including drying at 110°), or when it is given, without the original figures, as having been recalculated on a water- or carbonic-acid-free basis. HATING ADOPTED. 41 Under the working plan already described, one of these factors compensates for the other to a certain extent. Thus a less degree of completeness is compensated for by a greater degree of accuracy. We would then judge, for example, an analysis of rating A2 and one of rating Ill to be of about equal value. This is, confessedly, only true within limits, and must be used with judgment and with a recognition of its empirical character. To express, then, the various ratings of equal value we can employ live series of terms as follows: Excellent or first rate, good or second rate, fair or third rate, poor or fourth rate, and bad or fifth rate. Their meanings, in terms of the symbols chosen, will be seen in the subjoined table, ratings of the same value falling on the same horizontal line. First rate. Al Second rate. . A2 Bl Third rate... .' A3 B2 Cl Fourth rate. .j A4 B3 C2 Dl B4 C3 D2 Fifth rate.< C4 D3 . D4 Excellent. 1 Good. [Superior. Fair. Poor. Bad. Inferior. In other words, analyses of the rating Al—that is, perfectly satisfactory both as to accuracy and completeness.—would be called either “ excellent ” or “ first rate,” the two terms being synonymous. An analysis to which is assigned the rating either A2 or B1 would be spoken of as “good” or “second rate.” One with either of the three ratings A3, B2, or Cl would be called “fair” or “third rate;” one with the rating A4, B3, C2, or Dl, a “poor” or “fourth rate” analysis; while one worse than these would be “bad” or “ fifth rate.” In any case, it must be remembered that accuracy should count rather more than completeness, since often an approximate correction can be made for constituents not determined, as in the case of Ti0 2 and P 2 0 5 affecting A1 2 0 3 . Consequently, though of the same general rating, an analysis to which may be assigned the symbols A2 is worth rather more than one to which B1 applies, and similarly with those assigned to A3, B2, and Cl in the order of merit. As a mnemonic convenience it may be useful to note that, replacing the letter indicating accuracy in any given rating by its serial number in the alphabet, the sum of this and the figure indicating completeness will be one unit greater than the rating of the analysis. Thus in a first rate analysis, of rating Al, the sum will be 2; in a second rate analysis, of rating A2 or Bl, the sum will be 3; in a third rate one, of rating A3, B2, or Cl, the sum will be 4. In the case of fifth rate analyses, however, the sum may be greater than 6, as, for instance, in the rating D4, where it will be 8. 42 CHEMICAL ANALYSES OF IGNEOUS ROCKS. As will be .seen presently, analyses of the first three ratings—that is, excellent, good, or fair—are worthy of use in petrological discussions, while those of the fourth or fifth rate, poor or bad, are of little or no use. In order to be able to distinguish between the two it will be well to have some short terms expressing the difference. I would suggest, therefore, that excellent, good, and fair analyses be spoken of collectively as superior, while poor and bad ones will be inferior. It may be advisable to extend these ratings by using, for instance, E for a still lower degree of accuracy and 5 for an analysis hopelessly incomplete. Thus, E might be used when the alumina and magnesia, the iron oxides, and the alkalies are all manifestly incorrect, or when the sum is below 98.00 or above 102.00; for a number of such analyses may be found. Similarly 5 might apply when the iron oxides are not separately determined and also when the alkalies are given by “difference.” But E and 5 have not been used here, because this scheme of rating is, in a way, tentative, and also for the reason that when an analysis is so bad as to call for a D or a 4 it seems scarcely worth while to indicate further degrees of inferiority. On the other hand, it may be advisable in the future to indicate a higher degree of accuracy or completeness than is generally implied by A and 1. Thus, while A will apply to the general run of excellently accurate work, we might wish to distinguish that of a still higher order, as the best of that which Drs. Hillebrand, Stokes, and Steiger have done. This may be accomplished by the use of A*. Sim¬ ilarly it may be useful to discriminate analyses having such a degree of completeness as is found in Hillebrand’s analyses of the rocks of the Leucite Hills, in which everything possibly present has been determined, from those in which some, but not all, of the rarer constituents have been estimated. This would involve the use of 1*. A combination of A* and 1* might be called “perfect,” the word being used subject to human limitations. There does not as yet seem to be much need of this distinction, though it will undoubtedly be more advisable in the future than the discrimination between degrees of badness, as just described. In using these ratings it must be remembered that they indicate the general character of the analysis. Some features may justify us in calling the analysis as a whole either poor or bad, and yet it will be of use in a limited way. Thus, the iron oxides may not be separated, or the common error may be made in regard to alumina and magnesia, so that the analysis must be rated as fourth or fifth rate, taken as a whole. At the same time it may be, as often happens, that the lime and alkalies, for instance, have been correctly determined, as well as the silica, so that for purposes in which only these determinations are of importance the analysis may be useful to this extent. But, notwithstanding this, in view of the evident errors present, the analysis can not be regarded as satisfactory. DISCUSSION OF THE TABLES. 43 The question now arises as to what ratings are practically of use. Leaving out of account cases such as those just mentioned, where utility attaches to some single determinations, it may be held that, for general purposes, only first or second rate (excellent or good) analyses should be countenanced or used by petrographers. The high standard set by the chemists of the United States Geological Survey should be adopted by all, and the chemical side of petrology should be established on as firm and satisfactory a basis as is the microscopical. At the same time it will very frequently happen that an otherwise good analysis in which the more important of the minor constituents have not been determined, such as Ti0 2 and Po0 5 , will be of use for very many purposes, such as the classifi¬ cation of the rock. Third rate or “fair” analyses may therefore be considered usable, especially if of high rate as to accuracy, since, in many cases, corrections may be applied for constituents which have not been determined. Excellent, good, and fair (superior) analyses may therefore be considered usable, while poor or bad (inferior) ones must be rejected in an} r discussion, unless the elucidation of a special point for which some of the reliable determinations may serve is the only question at issue. DISCUSSION OF THE TABLES. DIVISION INTO PARTS. As will be explained below, it was desired to arrange the analyses embraced in the collection according to the new system of classification. For the majority of analyses of course this was perfectly feasible, but it v T as soon seen on critical study of them all that only a part could or should be thus treated. There were found to be, for instance, a surprisingly large number in which the iron oxides had not been determined. While this is of comparatively small impor¬ tance in analyses of persalanes, w T here these constituents are present onl} T to the amount of 1 or 2 per cent, it becomes a most serious matter in the other classes. Indeed, if the iron oxides amount to more than about 2 per cent and are not separately determined, it is generally impossible to classify the rock with certainty, since some assumption must be made as to the real state of oxidation of the iron, and this will not, in all likelihood, be in accordance with the facts. If the iron is assumed to be present as ferric oxide alone, this must be cal¬ culated to find the norm as hematite, thus freeing an amount of silica equivalent to the ferrous iron really present, which will alter the relative amounts of the other minerals, or change lenads into polysilicate feldspars, or olivine into hypersthene. On the other hand, if all the iron is assumed to be ferrous, which we have established as the rule to follow in such cases for the sake of uniformity, an amount of silica will be needed to satisfy this which w ould not be used if part of the iron were ferric, and this would have the reverse effect on the other normative minerals to that just mentioned. 44 CHEMICAL ANALYSES OF IGNEOUS ROCKS. It will, of course, be equally at variance with the probably true state of affairs to make any other intermediate assumption, such as, for instance, that ferric and ferrous oxides are present in equal amount, the iron being- thus assumed to be present in the rock only in the form of magnetite. - We are therefore compelled to reject nearly all such analyses for the purpose of classifying the rocks of which they have been made, as we have previously stated.® Along with them must go a large number in which it is certain that the alumina is much too high and the magnesia correspondingly low, or in which we know, from the descriptions, that there must be a very notable amount of Ti0 2 which has not been determined, and which consequently serves to raise the apparent amount of alumina. In these cases the salic lime, and therefore the normative anorthite, will be too high and the classificatory position of the rock consequently false. The point may be raised that this is a serious objection to the new system of classification, which thus demands the determination of these constituents in the analyses. In the old si^stems such imperfect analyses could be and were used, or inserted in papers, though they were admittedly faulty in these respects. To the critic, however, who examines the question in an unprejudiced way, this will be seen to be not an objection, but really a very strong point in favor of the new system. For it postulates as fundamental to the classification the absolute necessit} - for .only the best class of analytical work. And it is a self-evident fact that this science, like any other, must be satisfied with only the highest class of data in all its departments. The admission of admittedly defective elements into any classification only tends to weaken the whole and to delay the progress of the science. There were also found a very large number of analyses that were obviously so bad in other respects as to be almost or wholly worthless. It is needless to cite instances. They may be found throughout the whole of Part II. Analyses of tuffs and ashes, and of rocks so badly decomposed as to be far from their original composition, were also found in abundance. Though many of these are analyses of the highest ratings, } T et they obviously were of no use for purposes of classification, and hence could not logically be correlated with those of massive or unaltered rocks. The problem as to what should be done with all these cripples and invalids was finally solved by resort to segregation from the sound and healthy analytical individ¬ uals, and the collection was divided into two parts. Part I— Here are to be found all the superior analyses, of the first three rat¬ ings, excellent, good, and fair, except those of tuffs, ashes, and more than slightly decomposed rocks. With them were also put a few inferior analyses of the last two « Cross, Iddings, Pirsson, Washington, Jour. Geol., Vol. X, 1901’, p. 046; also The Quantitative Classification of Igneous Rocks, 1903, p. 190. DISCUSSION OF THE TABLES. 45 ratings, poor and bad, which were deemed to be of especial interest and importance, or which were almost the only examples available for illustrating the chemical and mineralogical composition of the divisions into which they seemed to fall. Although, as a general rule, analyses in which the iron oxides had not been separately deter¬ mined were rejected from this part, yet in the persalane class a number of otherwise good ones were inserted, since the total amount of these oxides was small, and the neglect of their separation would not affect their classificatory position. For reasons to be given later, all these analyses in Part I were classified according to the new system, but the position of rocks of which the analyses are untrustworthy for any reason must be regarded as merely provisional, and subject to alteration in the future on the basis of new and better analyses. Part II .—In this part were placed all the inferior analyses of the last two ratings, poor and bad, except those admitted to Part I for reasons just given. These analyses to be found in Part II will include bj 7 far the greater portion of those in which the iron oxides have not been separated, especially those of rocks belonging to Classes II, III, IV, and V. As has been seen, some of those which are faulty in this respect, but which are of persalane rocks, are to be found in Part I. Analyses of tuffs and ashes and of decomposed or altered rocks were also placed in Part II, even though they are of the highest rating. The analyses in Part II are classified according to the scheme given in Zirkel’s Lehrbuch (I, 1893, p. 820). This was adopted in preference to the system of Rosen- busch, because it is primarily based on chemical distinctions to a greater extent than the other, which gives structure and geological mode of occurrence the more funda¬ mental position. According to the order which Zirkel follows in his text-book, the granites, the quartz-porphyries, and the rhyolites, for instance, come close after one another, while according to Rosenbuscli they would be widely separated. As this is a collection of rock analyses, the presumable main use of which will be their correla¬ tion, Zirkel’s arrangement was deemed to be the most advisable to adopt. The analyses, then, in Part II will follow in the sequence given in the tables of contents of the second and third volumes of Zirkel’s Lehrbuch. But some new types, which have been described or named since the appearance of that work, or which were omitted from it, have been placed in this system where they seem to belong most logically, or in the position the} 7 should take as indicated by Rosenbusch. In cases of uncertainty on the part of the reader the index to the old rock names will be found useful. Within each of Zirkel’s groups, whether large or small, the analyses are arranged on a geographical basis, which is that followed in Part I, and a description of which will be found on page 64. The rock names used in each case are those given by the original authors. 46 CHEMICAL ANALYSES OF IGNEOUS ROCKS. BASIS OF ARRANGEMENT OF ANALYSES. ATTEMPTED USE OF CURRENT PETROGRAPHIC SYSTEM. When this collection was first started, two or three years ago, the analyses were classified according to the system of Rosenbusch. Generally the name given by the author to the rock was adopted, but in many cases the name seemed to me to have been wrongly applied, when I took the liberty of renaming the rock, keeping the author’s name in brackets. As the collection progressed this became a frequent occurrence, as was by no means surprising in view of the loose principles, the subjective and qualitative character, and the vague definitions of the systems in vogue. It furnished a most striking illustration of their illogical, inconsistent, and unsatisfactory character, and was a most cogent argument against their continued use. It indicated, indeed, that there was in realit}^ no one system to which one could turn for guidance, but that each petrographer had been forced to set up his own standards to some extent, to make his own definition of manj^ of the terms in use, or to assign his own limits to them, which might or might not correspond with those of others—in a word, partially to make his own classification and nomenclature. Each was a hodgepodge, made up of bits taken from this or that authority, or evolved from the individual author’s own ideas. There was seldom if ever any broad prin¬ ciple which one could apply throughout, and the result was a clashing of principles, inconsistencies everywhere, and a lack of harmony and even development. If one had been engaged on a certain group of rocks the private classification in that group would be very detailed, while in other more neglected spots the names given would be few, and the classification of some authority would be used with no critical estimate of its applicability and no thought of its logical consistency with the other more detailed and familiar parts of the scheme. Everyone has recognized this vaguely, but it is forced upon one when a large collection of rock analyses is undertaken and a careful comparison is made between the descriptions and analyses and the names applied b} T the many writers consulted. Roth" has, though much more concisely, expressed somewhat similar views as to the condition of affairs, and is inclined to think that no one system will ever receive general acceptance. The present writer is less pessimistic, and regards the lack of any universally adopted system of classification as due less to the difficulties caused by the characters of rocks than to the general lack of appreciation of the necessity for logical and consequent principles, and to a natural disposition to patch up the old rather than to substitute something totally new, even though better. a Roth, J., Chem. Geol., Vol.-II, 1883, p. 41. Cf. Cross, W., Jour. Geol., Vol. X, 1902, p. 473. DESCRIPTION OF THE QUANTITATIVE CLASSIFICATION. 47 ADOPTION OF THE QUANTITATIVE SYSTEM. During the progress of the collection the writer became interested, with Cross, Iddings, and Pirsson, in the working out of the system of classification and nomen¬ clature of igneous rocks which has been recently proposed by us. In the course of this work the growing collection of analyses was continually appealed to, the modes of many of the analyses were calculated, arid they were shifted and rearranged from time to time to test the various propositions or suggested lines of classification till all agreement with any system at present in use was lost. After having arrived substantially at the system of classification which was finally adopted, it was seen that the collection arranged in accordance with this would not only be its best exponent, but would be an indispensable foundation for purposes of nomenclature, the consideration of which was taken up only after the main features of the classification had been disposed of. The collection was therefore finally arranged as far as possible in accordance with the new system, and, with the approval of my colleagues, it was decided to publish it in that form. Most of those who use these tables will have had some acquaintance with the system spoken of, for a full description of which the reader must be referred to the original paper, 0 where both the classification and the nomenclature are described at length. But for the benefit of those to whom the original paper is unknown or inaccessible, a brief summary of its main features may be given here. QUANTITATIVE CLASSIFICATION OF IGNEOUS ROCKS. CONSTRUCTION OF THE SYSTEM. The system is a quantitative chemico-mineralogical one. All igneous rocks are classified on the basis of their chemical composition, and all rocks of like chemical composition are grouped together. The definition of the chemical composition of a rock is expressed in terms of certain minerals capable of crystallizing from a magma of the given chemical composition, and the expression is quantitative. For this pur¬ pose the rock-making minerals are divided into two groups, consisting on the one hand mainly of the alkali and lime alumino-silicates, and on the other of the nonalum- inous ferromagnesian ones. The first is called mnemonically the salic group, the latter the femic group. From these categories the aluminous pyroxenes and amphi- boles and the micas are excluded for reasons given in full in the paper cited. To completely classify a rock by this system its chemical composition must be known by chemical analysis or by physical or optical means. Here we have only to deal with the first of these. Since a given magma may crystallize into different across, Iddings, Pirsson, Washington, Jour. Geol., Vol. X, 1902, pp. 655 et seq. Also Quantitative Classification of Igneous Rocks, Chicago, 1903, pp. 95 et seq. 48 CHEMICAL ANALYSES OF IGNEOUS ROCKS. mineralogical combinations, according- to the circumstances attending its solidifica¬ tion, it is necessary to select a certain set of salic. and femic minerals as uniform standards of comparison. In practice the molecular composition of a rock, obtained from its chemical analysis, is computed by a regular method into amounts of these standard minerals, and the place of the rock in the system is then easily determined. The standard mineral composition so obtained is called its norm, and will be found in these tables in the column under this heading, for every rock classified by this system. The norm may or may not agree with the actual composition or mode. On the relative proportions of the two groups of standard minerals, salic and femic, present in the norm, the rocks are first divided into five classes, according as one or the other of these two groups alone constitutes the norm, or is extremely abundant; whether one or the other is dominant, or whether the two are present in about equal proportions. The classes thus formed are divided into orders on the relative proportions of the minerals forming the predominant group in each case, and in the middle class on the relative proportions of the minerals of the salic group. Thus in the preponder¬ antly salic classes the orders are based on the relative amounts of quartz, feldspars, and feldspathoids (lenads). The orders are divided into rangs on the basis of the chemical character of the basic oxides in the minerals of the preponderant group in each case; thus if these were feldspathic, as to whether they were alkalic, alkalicalcic or calcic; if the} 7 were ferromagnesian, as to the relations of femic alkalies, femic CaO, and (Fe, Mg)0. Rangs are further divided into suibrangs according to the proportions of the variable basic oxides present in each case. Thus, if these are alkalies, on the rela¬ tions of soda to potash; if ferromagnesian, according to the ratio of magnesia to ferrous oxide. A lower division, the grad, obtains only in the three intermediate classes, and results from a consideration of the relative amounts of the minerals com¬ posing the subordinate femic or salic group. In the present collection, however, this division will not be used, the subrang being the lowest division to which the classification is here carried, for reasons to be explained presently. In addition to the above divisions, further ones are provided for where necessary by subclasses, suborders, subgrads, and sections of all of the divisions. The actual mineralogical composition, or mode, and the texture are considered of minor importance in classification, and are only taken into account after the chem¬ ical or magmatic characters have been disposed of. They are not considered in the collection. NOMENCLATURE OF THE SYSTEM. * As the system demands an entirely new nomenclature, it has been sought to introduce this according to a definite method, the lack of which is so painfully evi¬ dent in that at present in use. The nomenclature proposed consists of three OLD AND NEW NOMENCLATURES. 49 parts: Primarily, of substantive names for the magmatic units, implying the chemi¬ cal composition and the norm; secondarily, of two sets of adjective terms qualifying the magmatic names, one set referring to the actual mineral composition or mode, the other to the texture. Of these, only the tirst concerns us here. The magmatic name consists of a root, derived from a geographical name in all cases, except for the names of classes and subclasses, and of a suffix. The suffixes are so chosen as to vary in a definite way with the division of the system to which the magmatic name belongs. Thus, for class, order, rang, and grad the letters n, r, s, and t, in alphabetical order, are used respectively, with the vowel a, giving in English ane, are , ase, and ate. , For subclass, suborder, etc., the vowel is changed to o, giving one , ore, ose , ote. For sections i is inserted before the ending. The roots of the names for classes are sal and fern, mnemonic of the salic and femic groups constituting their norms, and are combined with prefixes yielding the following terms: Persalane, dosalane, salfemane, dofemane, perfemane. The roots for the names of the divisions smaller than subclass are derived from the names of geographical localities, and as far as possible from those at present in use for rock names, advantage being taken of their connotations as to magmatic character. The roots for the names of the orders, however, are derived from the names of countries, as the concepts implied by them are broader than, and are not covered by, any of the names in present use. COMPARISON OF OLD AND NEW NOMENCLATURES. The rocks being classified according to the new system, it follows, as a matter of course, that the nomenclature constructed by us for that system is used here. This has the further advantage of illustrating by concrete examples the various divisions, as well as that of indicating the source of the roots of the magmatic names. As, however, it may seem to many, on looking over the tabulated names, that we have added much to the difficulties of the petrographer by a flood of new names, we may briefly examine this question and see whether objections based on this are really justified, granted the logical necessity for a new nomenclature to express the ideas of the new classification. It will be found on examination of the tables that there are 257 magmatic names . proposed by us, from class to subrang. A large proportion of these, however, differ from one another only in the terminations which successively narrow the connota¬ tion of the root. This, of course, greatly facilitates their comprehension, since, given the knowledge of the meaning of the name of a rang, as that liparase is per- alkalic, it is a very easy matter to remember that a given subrang with the same root has a certain narrower character, as that liparose is sodipotassic. 14128—No. 14—03-4 50 CHEMICAL ANALYSES OF IGNEOUS ROCKS. Furthermore, a certain proportion have roots derived from the names of the old systems, which, by constant usage in the past, will carry connotations as to their mag¬ matic character. Thus the root lipar conveys the two ideas that the silica is high (modal or normative quartz being consequently present), and that only alkali feld¬ spars are found (i. e., alkalies greatly in excess of lime), the rock being peralkalic. The names and roots may be tabulated as follows, sections of orders and sections of rangs being placed under these respective divisions: Number of names. Old. Roots. New. Total. Class . 5 5 5 Subclass. 5 Order. 40 40 40 Suborder . 2 1 1 Rang. 86 35 31 66 Subrang. 119 18 39 57 257 53 116 169 Let us see how these compare as to number with the old names, taking into account only the roots of these, unqualified by mineralogical or textural additions. Thus andes will be counted only once, and such names as biotite-andesite, andesito- phyre, trachyandesite, andesite-porphyry, etc., will be neglected. Undoubtedly the most comprehensive list of rock names now in print is that found in Loewinson-Lessing’s Lexicon, published in 1901 . a In this there are 207 locality and other roots used in forming names of rocks. The index to the last edition (1896) of Rosenbusch’s Massige Gesteine shows 182 name roots. Both of these are undoubtedly somewhat too 1ow t , as some new names have appeared since their publication, and a few older ones have been omitted. Taking them as they stand, it will be seen that the total number of new T names proposed by us thus far is not greatly in excess of those in the old systems. The difference is still more marked when the roots of the new system are considered. These only amount to 169, against the 207 of the old, of which, furthermore, 53, or nearly one-third, are borrowed from the old names, and hence carry some connota¬ tion as to their significance. Inspection of the small table above will also show that about 30 per cent of the new roots are allotted to the classes and orders. Here they are absolutely necessary because these divisions imply concepts much broader than, and quite distinct from, any to, be found in the old systems. Of these, the class and subclass names are self- aComptes Rendus VIII® Cong. Geol. Int., Paris, 1901, pp. 1009-1302. OLD AND NEW NOMENCLATURES. 51 explanatory. Of the ordinal names, many, such as canadare, russare, norgare. lap- pare, and finnare, while not derived from present rock names, 3 T et carry in them¬ selves quite evident petrographical implications. In view of the facts thus briefly presented the nomenclature of the new system can scarcely be considered overpowering as to the number of new names, compared with the old. It is true that two objections may be raised against this conclusion. One would be that, even only carrying the. classification as far as subrangs, there are numerous vacant spaces, indicated in our tables by x, as well as many others which are so far unrepresented by known rocks. To this the answer may be made that the new names for these spaces will come more or less gradually, and will hence be easily assimi¬ lated. A great many of them, also, will be applied to rocks which occur in divisions representing magmas of unusual chemical character, and which would, therefore, even under the existing systems, be deserving of, or at any rate would receive, new names. We shall in any case be spared, to a great extent, the flood of new names given to rocks having chemical and often mineralogical characters identical with those of well known ones, the only excuse for which seems to be some slight difference in texture, mode of occurrence, or accessory minerals. New names, under the system proposed, could or should be bestowed only after careful chemical analysis or an equivalent microscopical estimate of the mode on which to base the norm. A clear understanding of and adherence to this funda¬ mental principle of the new nomenclature will do much to check any rash attempts at the bestowal of new names, and will render those proposed in the future, under the new system, worthy of consideration, and make them precise as to their meaning, which certainly can not be said in all cases of those proposed during recent years. The other objection that might be raised is, that no account has been taken in the preceding remarks of the names which will be needed for grad and subgrad names. It must be remembered in this connection that no such names will be needed for the persalanes and the perfemanes, which, as will be seen later, constitute nearly 40 per cent of known rocKs. They will also be of comparatively limited use for the dosalanes and the dofemanes, to which belong about another 40 per cent of known rocks. In the salfemane class, however, to which belong the remaining 20 per cent of rocks, they will be probably much needed and used. Even thus, however, and even assuming the pressing need for such distinctions in Glasses II and IV, this can not be considered a very serious objection. In the first place, these names, like those for the other divisions of higher taxonomic value, will come more or less gradually and will therefore be learned with comparative ease. In the second place, as we have already indicated, these gradal and subgradal 52 CHEMICAL ANALYSES OF IGNEOUS ROCKS. distinctions may, and will, often be exactly expressed conveniently by adjectives indicating the type or habit, so that the nomenclature will probably tend to become binomial. As regards the number of possible grads also, a little consideration will show that thev can not be as numerous as might appear at first sight. For, from the principles regarding the distribution of silica which control the method of calcu¬ lating the norm, a very considerable proportion of the grads which at first sight seem possible can not actually exist. Thus, in the first three classes, if quartz is present among the salic minerals there can be no olivine or akermanite among the subordinate femic minerals, so that the grads characterized by the presence of these will not be possible. Similarly, if leucite or nephelite be present among the prepon¬ derant salic minerals there can be no grads based on hypersthene. Again, with anorthite present, grads characterized by acmite can not exist. Akermanite also can not be present if there is any feldspar in the norm. It must also be borne in mind, in considering these matters, that the new names indicate the chemical character of the rock with a degree of precision and clearness quite impossible with those of the older systems. Thus the old name “diorite” implies nothing more than a holocrystalline, granular, igneous rock, composed essentially of a plagioclase (of almost any kind) and dark minerals, chiefl} r horn¬ blende or biotite, these and the feldspar being present in almost any proportions. The variety of dark mineral may be indicated, when such precision is desired, by the prefixing of the appropriate mineral name. The new nomenclature, on the other hand, will indicate the texture and mode by the use of the prefixes grano and either hornblende or biotite, and will also indicate exactly the chemical character of the rock by the use of one of half a dozen magmatic names, leaving the reader in no doubt as to the complete character of the rock, magmatic, modal, and textural, as well as the relative proportions of the minerals. It might also be added that even if the number of new names necessary were ten or a hundred fold those suggested in our tables, petrographers would be still in a far happier condition than their colleagues in paleontology, zoology, or botany, with the thousands and tens of thousands of names and their connotations with which it is absolutely essential that they should be acquainted. It must be remembered that petrography is really young as compared with these sciences, so that, being near the beginning, we enjoy a great advantage over workers in them in respect to the ready acquisition of any nomenclature; and that, further¬ more, it scarcely seems probable that, even granting the need for the recognition of very minute differences in rock characters, the number of names ever called for in petrography will approach those needed in the organic sciences, or even in chemistry. TABULAR CLASSIFICATION. 53 TABULAR EXHIBIT OF DIVISIONS ANI) NAMES OF QUANTITATIVE SYSTEM. There is appended a tabular list of the divisions and the names proposed for the new system, which is similar to that published in the original paper and book, except that a few additional names proposed by us have been inserted. To each name is also added, in brackets, the number of superior analyses, of the first three ratings (excellent, good, and fair), which are to be found in Part I of the collection in the case of every division. These will be referred to and used in certain calculations subsequently. Table I.—CLASS I, PERSALANE (652). 54 CHEMICAL ANALYSES OF IGNEOUS ROCKS. CO 03 u 2 eg s o bo d 03 - bo c 03 03 O o a 3 H O CO T Cg T3 eg 44 £ O £ c3 44 C 44 44 *r > d c4 co X X 1*5 ci- co o 'd eg d eg G eg O PQ g; o" o eg bo o 03 £ o o bo c eg 03 /. O g c ci (1) 0 d o o x O >■ r ’ -M > .9 ,2 9 2) ci co rf O 'd eg 9 rf H d CO O - bo 42 03 bo eg id * d bo W s r-t d bo be G G eg eg t_ t- 42 42 CC GQ CO ^ be bo eg ig s- S-h *2 *2 sg 42 eg 42 CJ r w 03' Q 03 5 S J S 03 ^ H c G C 44 K* ift* 03 V. O * g « GC 03 2 ci co -r *"-l © i-H T I-I Cl CO X X T-l d co ^ bo bo bo bo G G G G eg tn 42 bo eg 42 G G G G co c n w m X X tH d co -* >o bo bo bo bo bo G G G G G 2 2 ^ -2 C/2 C/2 C/2 5$ £ OQ iH d CO be bo bo G G G eg eg eg S-. H *- *2 2 2 t/2 03 C/2 o -g 05 Table II.—CLASS II, DOSALANE (676). TABULAR STATEMENT OF CLASSIFICATION. g« g. oi a a oj o »H JZ 13 be t-. o £ # c3 5 O ’55 3 p 5 o o £ 43 p -*-» If '-3 0) P fe *"a c3 >d PQ S3 > as X 0> x 71 w o a) P CO t£ O g S o £ « W cj Oi X X a x $ c3 a t-i a> O 44 0) o h3 £ 43 be o 44 D o,- S3 | 6 9 P * 'C a o £3 O 43 QC O 43 co o o3 43 CO ^ lO H N CO s o o p < S3 O *G o a? OQ 3 O 15 P r7 O 05 05 O t—< r-4 y —- a> m I * “ c3 •p < uo o Eh X o N Sh & B eS G o H c3 'G c3 « a * c3 be c3 co be o be X X a 3 o 44 O O W be be P P 43 43 be 43 P m bo P be 43 3 CO P z < »-t oi be be 3 :2 t- (H 6 ^ OJ CO be be be CSC 43 33 be be be p p p a3 ^ oj S-. u 4 3 3 CO CO CO ^ lO be be G G £ £ 43 43 co co be bo be G G G 43 43 O -4 O X *4 P5 55 Table III.—CLASS III, SALFEMANE (304). 56 CHEMICAL ANALYSES OF IGNEOUS ROCKS. ti gn 'C cc £ « £ o > 75 o 0) 73 o o o CM „— K ^ , CO ^H lO i“H ' w ' a 73 X eg C o £3 C X 00 x nj eg 0 _2 ,0 > < 0 CM r- CM* CO rr id 03 CO as eg fl M be o: cc ^ eg H * 1 w CM CO TT 0) X "f eg be 03 J3 0 eg be g a o c be g a o X X o ~ 0) s-. o o 'C 03 tH o 03 CM ,X CM eg O S cm’ 0) cc o 3 o co CM CO A o CO o 5 Ui CO pH J CM CO O P eg ,Q a 3 o CM CO o be tH P rQ a 3 x x o* a eg O 0) - 73 o o o ,0 <1 CO 0) x o o -M pH a r-t CM CO O id eg G be 03 X O So 03 eg M 03 rQ eg 03 w iO 03 t- gg 3 eg > eg eg > i-H CM CO 03 x eg eg Ph id W Q P$ O T—i CM CO rj< iO tH CM CO T}1 10 rH CM CO 1.0 tH CM CO be be be be be be be be be be be be be be be be be be C3 £3 £3 £j a £3 c C £3 £3 P c3 eg eg eg eg eg eg eg eg eg eg eg eg eg eg eg 0 eg M tH Sh tH t-> tH tH (-1 t-i to tH tH Sh tH tH tH tH 1 —l £> ,c rO ,Q rP CM j£3 & -O Jp ,0 CO X3 P3 X2 ,q jp rg .Q rO r* £3 £3 O £3 £3 2 £3 £3 0 X £3 £3 G £ p p p 2 CC cc CC CO C/3 CO GO CO CO CO CO CO CO CO CO 0 X CO CO CO < cp Ph o , shoshonose, andose, hessose, salemose, camptonose, auvergnose. “Andesite” is met with as dellenose, toscanose, lassenose, amiatose, yellow¬ stonose, pulaskose, laurvikose, adamellose, dacose, harzose, tonalose, placerose, bandose, umptekose, monzonose, akerose, shoshonose, andose, beerbachose, hessose, laurdalose, salemose, lamarose, kilauose, kentallenose, camptonose, and subrang 5 of albanase. Even “ camptonites ” are found scattered among placerose, hessose, salemose, kentallenose, camptonose, auvergnose, shonkinose, and limburgose. When the list for any of these is looked up in the tables of Part I, the chemical characters of the divisions of the new system into which the} T fall being borne in mind, the great chemical variety possibly implied by any one of the old names is most striking and indeed significant. Thus the “andesite” of different authors, though the various rocks so named may have certain textural features in common, CHEMICAL ANALYSES OF IGNEOUS ROCKS. 62 has been applied to rocks varying chemically from persalane to salfemane, derived from magmas rich in silica (i. e., with much normative quartz) to those low in it (i. e., with much normative nephelite)—rocks varying from peralkalic to docalcic, from dopotagjsic to persodic. In other words, “ andesite ” may mean rocks having chemical compositions ranging from those of granites to those of “ basic” diorites, camptonites, and gabbros. Similarly the composition of “syenites” and “tra¬ chytes ” may be that of granites, syenites, foyaites, diorites, or gabbros. Conversely, to give only a few examples out of the many possible, the subrang nordmarkose is represented by very similar analyses of rocks described as quartz- porphyry. quartz-syenite-porphyry, syenite-porphjuy, biotite-porphyrite, lestiwarite, nordmarkite, pulaskite, trachyte, bostonite, andesite, nephelite-syenite, foyaite, phonolite, tinguaite, litchheldite, and solvsbergite. Yellowstonose includes rocks called granite, granodiorite, adamellite, quartz-diorite, diorite, porphyry, porphyrite, syenite, dacite, andesite, trachyte; and camptonose embraces camptonite, diabase, melaphyr, basalt, gabbro, norite, essexite, andesite, phonolite, basanite, and porphyrite. COMMENT ON FACTS EXPRESSED BY TABLES. It is true that different names have been applied to the same or similar magmas on the basis of textural differences, but even the few instances given here, which might be multiplied indefinitely, serve to show conclusively that the chemical com¬ position of rocks plays but an infinitesimal part in their classification according to the systems at present in use. Many petrographers avowedly use a mineral classification as representing the chemical composition. But this is done in almost all cases in a purely qualitative wa\ T , and in apparent ignorance or neglect of the obvious fact that a mineral classifi¬ cation will express the chemical characters of rocks only if it is strictly quantitative. Otherwise, of course, the chemical character will be almost wholly lost sight of in the majority of instances, or at least will not be indicated with any approach to certainty or completeness. These considerations, and the correlation given elsewhere, constitute, in reality, a reductio ad absurdum of existing classifications, if these make any pretense at being- founded on the chemical or the quantitative mineralogical characters of igneous rocks. When two rocks of the same chemical composition can be called, the one a granite, the other a diorite, or when one name is applied to rocks varying chemically to the extent implied usually by these names, it seems time that something be done to * define our terms and to replace the vague rock names and definitions at present in use by some which have more precise and clearly defined limits and meanings. APPARENT EXCEPTIONS TO PRINCIPLES. 63 While, in general, the chemical similarity of the analyses embraced in any given subrang is very evident, yet the critical student will find instances here and there of analyses in the same subrang which vary considerably from one another as regards certain constituents, or which vary more from others in tlnysame subrang than they do from analyses elsewhere. This is especially noticeable in regard to the silica percentage, which may vary as much as 10 per cent of the.whole rock in a given subrang. Alumina may also vary considerably—to the extent of 5 or 0 per cent— and the other constituents also, but generally to a less extent. Some of these cases of apparent contradiction to one of our fundamental prin¬ ciples are due to the fact that the analyses of some rocks which are not quite fresh have been included in Part I for various reasons.. The amount of water and carbonic- acid present will, of course, diminish the amounts of the other constituents, this diminution affecting most the silica and alumina, which are present in greatest amount. A few cases are also due to the nondetermination of Ti0 2 , the non¬ separation of the oxides of iron, or a high amount of ferric oxide owing to alteration of the rock. These will affect the amount of available silica in calculating the norm, yielding results which vary somewhat widely from the center point. But the majority of the apparent exceptions have broader explanations than these, and will be seen to be quite conformable with our premises. It must be remem¬ bered that this classification of rocks, like any other, allows for some variation from the center point of each division in different directions. This may affect any of the constituents, but will be most evident in those which are present in greatest amount, as silica and alumina. In the nature of the case such variation is unavoidable, and when chemical similarity is spoken of it is understood that the similarity lies within the limits assigned, conformable to the center point and to the boundaries of the division. A study of the tables of calculated center points, given later, will be of interest in this connection. The fact that an'analysis may resemble more closely one in another division than others in its own is, of course, due to the arbitraiy character of the classification. As was said in the paper describing this system,® “Unless the future should reveal new properties of rocks . . . every method so far devised, or which can be devised, must have artificial lines of division.” And again, “The difficulty in this respect lies not in the method, but is inherent in the subject itself.” It must also be borne in mind that in the proposed system of classification the position of any given rock depends on the mutual relations of all the constituents, and not on the absolute amount of only one or two, as is so often the case in the subsilicate in akermanite, and also in apatite and fiuorite. MgO and FeO are found in the metasilicates, diopside, and hypersthene, and in the orthosilicate olivine, while FeO also occurs in the mitic minerals, magnetite, and ilmenite. Fe 2 0 3 is found both in acmite and magnetite, and Na 2 0" in acmite and in Na 2 Si0 3 . A further feature which adds somewhat to the complexity is the fact that among the femic minerals, notwithstanding their greater number, there are few cases of antithesis between minerals; that is, pairs of minerals which, from the principles on which the calculation of the norm is founded, can not coexist in the norm. In the persalanes quartz and the lenads are mutually antithetical, but in the perfemanes representatives of the pyric, olic, and mitic subgroups can all exist simultaneously, as, for instance, diopside, hypersthene, olivine, magnetite, and ilmenite. The only case of antithesis of any practical importance in the perfemanes is that of hypers¬ thene and akermanite, though, according to the methods already published by us, akermanite can coexist with the hypersthene included in the diopside molecule. CALCULATION OF CENTER POINTS. 80 If the mixed molecule of diopside, CaO. (Mg,Fe)0. 2SiO a , be considered in calculating the perfemane center points, the matter becomes ven r complex in many cases, since there are numerous possibilities as to the mutual relations of this molecule, and those of olivine and akermanite. For purposes of simplification, therefore, I have, in the subsequent calculations, disregarded this molecule, that is, have con¬ sidered CaSi0 3 , MgSiO s , and FeSi0 3 as being independent of each other. This point will probably be discussed in a future publication. These various complications introduce an increased number of equations to be solved, and therefore add much to the labor of calculating the center points of the perfemanes, though, as has been said above, no change in the principles from those obtaining in the persalanes is involved. After the explanations which have been given for the persalanes it will be unnecessary to give here the general equations, especially in view of their increased number. It will suffice to give a few examples illustrative of the various points to be considered. Before entering upon these one important point must be mentioned in which the calculation of the perfemanes differs from that of the persalanes. It will be remembered that in the latter K 2 0 is assumed to have a greater affinity for Si0 2 than has Na 2 0, and that consequently, while the former can occur both in orthoclase and leucite and the latter both in albite and nephelite, leucite is formed in preference to albite if the amount of Si0 2 is insufficient to y r ield only polysilicate with the two alkalies. In the constituents of the femic minerals, on the other hand, there is no such marked difference in affinity for Si0 2 between MgO and FeO, so that these two oxides are distributed in equal ratios between diopside, hypersthene, and olivine (if all are present), after FeO has been allotted to magnetite and ilmenite. It must furthermore be borne in mind that, while among the salic minerals the number of mineral molecules is the same as that of the unit oxide, in the femic minerals there are several important cases where this does not apply. Thus the number of molecules of orthoclase or of leucite is the same as that of the K 2 0 in each, but in olivine the number of molecules of (Mg,Fe)0 is twice, and in akermanite that of CaO is four times, that of the respective mineral molecules. In the calculations of the perfemane center points I have adopted the following symbols: a = mol. of CaSi0 3 . b = mol. of MgSi0 3 . c = mol. of FeSi0 3 . d = mol. of Mg 2 Si0 4 . e = mol. of Fe 2 Si0 4 . f = mol. of FeO. Fe 2 0 3 . g = mol. of FeO. Ti0 2 . h = mol. of 4CaO. 3Si0 2 . k = mol. of Na 2 0. Fe 2 0 3 . 4Si0 2 . a = molecules of CaO in wollastonite. b = molecules of MgO in enstatite. c = molecules of FeO in ferrosilite. 2d = molecules of MgO in forsterite. 2e = molecules of FeO in fayalite. f = molecules of FeO and of Fe 2 0 3 in magnetite.- g = molecules of FeO and of Ti0 2 in ilmenite. 4h = molecules of CaO in akermanite. k = molecules of Na. 2 0 and of Fe 2 0 3 in acmite. 90 CHEMICAL ANALYSES OF IGNEOUS ROCKS. We shall then have: 116a = per cent of wollastonite (wo). 100b = per cent of enstatite (en). 132c = per cent of ferrosilite a (fs). 140d = per cent of forsterite (fo). 204e = per cent of fayalite (fa). 232f = per cent of magnetite (mt). 152g = per cent of ilmenite (il). 404h = per cent of akermanite (am). 436k = per cent of acmite (ac). Let us take as the first illustration Class V, order 1, section of order 2, rang 1, section of rang 2, subrang 3. This is perfemic, perpolic, dopyric, permirlic, domiric, and magnesiferrous. We have as equations expressing these relations, and the equal relations of MgO and FeO in the hypersthene and olivine, the following: (1) 116a + 100b + 132c+ 140d + 204e = 100 (Class). (2) 116a + 100b + 132c = 3 (140d + 204e) (Section of order). This may be conveniently written: (3) 116a + 100b -f- 132c = 75, and (4) 140d 4- 204e = 25 (5) 3a = b + c-f 2d + 2e (6) b = c, and \ (7) d = e J (Section of rang). (Subrang). Analogously with similar cases in the persalanes, as already explained, no equa¬ tions are necessary to express the order or rang. Substituting (5) in (3) we obtain: 116b A 116b 232d -{- 232e > , , ooi v. ■- - --—-+ 100b + 132b = (5, whence 928b = 225 - 232d - 232e. From (4) and (7) we get 344d = 344e = 25. Solving these we obtain for the values of a, b, etc.: a = .23431 b = .20612 c = . 20612 d = . 072675 e = .072675 whence we obtain the norm: Wollastonite.. 27.18 Enstatite.20. 61 Ferrosilite_27. 21 Forsterite.10.17 Fayalite. 14. 83 100 . 00 « As it was found to be necessary to have some name for the purely ferrous hypersthene molecule, FeSi0 3 , which has not yet been observed in nature, and for which there is no term in use, I have employed the name ferrosilite for this, following a suggestion made by Professor hidings. CALCULATION OF CENTER POINTS. 91 From this the chemical composition is calculated to be: SiO, ... 47.52 FeO ... 25.31 MgO... 14.05 CaO ... 13.12 100 . 00 Another example is given, introducing magnetite and ilmenite. This may be Class V, order 2, section of order 3, rang 1, section of rang 2, subrang 2, and what may be called section of subrang 2, in which hematite : ilmenite = 3 :1. We shall have for this center point the following equations: (1) 116a 4- 100b + 132c + 140d -f 204e -j- 232f -f 152g = 100 (2) 116a + 100b + 132c + 140d + 204e = 75 and 1 (3) 232f + 152g = 25 / (4) 116a-f 100b -f 132c = 37.50 and 1 (5) 140d+204e =37.50 J (6) 3a = b + c + 2d + 2e + f + g (7) b = 3c and \ (8) d = 3e J (9) 232f = 456g (Class) (Order) (Section of order) (Section of rang) (Subrang) (Section of subrang) From (3) and (9) we obtain the values of f and g, and from (5) and (8) the values of d and e. Substituting (6) in (1) we get: 116b +116c + 232d + 232e +116f +116g 3 100b + 132c + 140d + 204e + 232f + 152g = 100 This reduces to: 1760c = 300- 652d - 844e - 812f-572g = 42.60, and so we obtain the values: a = .23319 b = . 07263 c =.02421 d = . 18030 e = .06010 f =.08082 g = .04112 These yield the norm: Wollastonite.. 27. 04 Enstatite. 7. 26 Ferrosilite_ 3. 20 Fosterite.25.24 Fayalite. 12.26 . Magnetite_18. 75 Ilmenite. 6.25 100.00 CHEMICAL ANALYSES OF IGNEOUS ROCKS. 92 which give the chemical composition of this center point as: Si0 2 ... 34. 23 Fe 2 0 3 .. 12. 93 FeO ... 19.17 MgO... 17.32 CaO ... 13. 06 Ti0 2 ... 3. 29 100. 00 Similar equations may be formed for the various rangs which contain acmite, etc., but it is scarcely worth while to give illustrations of them here. In Table VII are given the calculated center points of order 1 of perfemane, the only rang represented being rang 1—that is, rocks with neither normative magne¬ tite nor ilmenite nor with acmite. This incompleteness is regretted, but the very large number of equations to be solved, and of percentages of minerals and chemical constituents to be determined, rendered a complete exposition of this class quite out of the question with the time at my disposal. It is hoped that at some not far distant date complete tables will be made both of the other orders and rangs of perfemane and of the corundum- and zircon-bearing subclasses in persalane. In combining the data of Tables VI and VII, to obtain the composition of any given center point for grads and subgrads in Classes II, III, or IV, the mutually antithetical character of various salic and femic minerals, based on the methods of calculation of the norm which we have adopted, and which preclude their coexistence, must be borne in mind. Thus, in Classes II and III, no grad characterized b} r the presence of olivine is possible when the salic portion contains quartz; none with hypersthene when nephelite or leucite is present; none containing diopside, wollaston- ite, or acmite when corundum is present; none with acmite when anorthite exists; nor one with akermanite when feldspar occurs in the salic portion. The converse relations hold good in Class IV. Table VI.— CALCULATED CENTER POINTS OF CLASS I, PERSALANE. CENTER POINTS. 93 CO |rH II T-i [O II cylfe 53 a o Q *o Is O G cS M Ph bo a3 8 iC iO ’J' iC S 8 S CO CO CO 8 iC be - •2 0Q fc- -Q C O < < ~ —i OJ lO o CO CO X CO o o t'- t- CO (M .75.00 11.00 10.35 3.65 90.77 5.38 0.74 1.25 1.86 rH 75.00 21.43 3.57 90.42 5.24 0.72 3.62 CO 75.00 25.00 93.17 4.87 96 T OJ 75.00 12.87 12.13 91.70 4.72 1.44 2.14 CO « O 53 O 53 ^ < a £ us 0> 'O 5. Percalcic. rH 50.00 50.00 71.58 18.35 10.07 4. Docalcic. CO 50.00 19.29 30.71 76.50 15.03 6.19 2.28 50.00 10.12 9.53 30.35 76.15 14.90 6.11 1.13 1.71 rH 50.00 20.00 30.00 75.76 14.87 6.01 3.36 3. Alkalicalcic. iC 50.00 32.67 17.33 79.93 12.72 3.49 3.86 50.00 8.59 24.25 17.16 79.63 12.60 3.45 2.87 1.45 CO 50.00 16.99 16.02 16.99 79.33 12.48 3.42 1.90 2.87 50.00 25.24 7.93 16.83 79.05 12.35 3.39' 0.94 4.27 rH 50.00 33.33 16.67 78.78 12.23 3.35 5.64 G 0, bo 5. Percalcic, rH 25.00 . 75.00 57.37 27.53 15.10 l 0 CO co X 04 0 O' O id X CO id X 04 d cd 04 04 co 04 O O O X c 04 05 05 c CO O CO i/5 04 04 1 - 04 d i-0 id 04 05 04 a 04 -T< CO 04 0 c 0 CO 1 - 0 0 X 0 O c rH id e id x 04 d id 04 CO 04 O 0 05 X X c O 0 X 0 04 X 1/5 id os d d 05 id id CJ hj 04 CO 0 r- iO 05 X p> 0 X X l> •?r X rH X T— id 04 d id oi X id 04 04 X 04 CO rH O cfl 05 04 05 Q Tj« O O T c -*f 0 I" rH X X CO in id 05 X id 04* -T 04 04 04 04 O CO c 'T X X X C ® X 05 04 IC 10 0 ~7 •^r iC I'* r- 10 X X iO co 04 X r- 04 co O O O lO in O O X 0 T id c id X X id X* 04 iC 04 CO O X 1^ in 1/5 in O 04 CO 1/5 04 iC iO id CO rH cd d 04 p- 04 CO —< p» rH © O' O' 04 04 HT< O X 04 O Cl. rH O X 04 i/5 X id CO ,_3 cd d 04" id 04* 6 04 rH CO 04 d iC N 50 W P H h ic d in 25.00 76.00 76.53 14.60 . 8.87 c c c X 05 CO 04 c CO rj I- X i/5 X lO 05 1/5 id Tf d cd 04 r- IT I- rH 05 X «c 04 CO CO X 0 rH x m X X d Tf d 04 X X P- rH c p> X P- c c c 05 04 05 CO 04 in p> 1^ Tf X* 04 d P- rH c c CO P» CO in id cd cd 04* Os i> he ■ r- . . eo Al an of 44 *4 ,Q ^ c w „ w 2 rS* ci 08 'w m < O 52; W be c bp 5 t. 6 Xti V *8 *3 0> id - 8 O* O CO cd Hr 36.70 d 04 co 38.59 61.41 04 O cd in 30.04 12.37 4.57 rt O 0 05 04 I" 04 04 C I- 04 04 -* 04 C 05 O 0 i 04 X Q IN r- w m 04 O 04 -r 04 04 O m i- O P- n c d d 04 CC -r CO in 04 rH Hf CO m X X CO X 05 P- m id d id co X in 04 X 04 04 05 c in x 04 05 P' 05 rp p* cd ^ d »d d id 04* ci X in 04 cd O' 04 05 CO X LO 05 ^ 05 c 05 CO 05 X P' I" X 04* X 00 d cd id XXX in 04 *< p> CO co O X X X cd X CO rH i> x m 04 0 id x X co X X m 04 p> X CO p- CO X 0 04 rH d cd TT d X m 04 X X 04 05 O X O O 0 m Hf m Tf<* 04 cd 0 X rH co 04 r- in r X 05 X -r 04 05 X 0 05 i» 04 04 Tj< 04 04 CO rH CO 04 cd r-H in CO CO X CO in 06 05 -f X X Tf cd yj, 04 S rr -T rH CO 04 0 05 Hf P- X X 04 04* 0 Tj< TJ* -cr 04 05 c 04 in O 04 04 CO 04 rH CO 04 1— rH 05 X P- 04 CO 05 X id yj, d 04 X rH 04 in 100.00 68.70 19.47 11.83 . . t . 26.13 73.87 8 g 1 ^ d 8.74 4.42 X 04 04 05 ^ in. 'f in CO X i^* p- X H X d cc id cd in hp CO rH CO Q 0 — x co X 05 Pr CO X X 04 d cd id x* 04* 04 04 CO r-t rH O • in in * Q O P* x • 05 d • TJ4 CO . d t\ ^ u & C o < < O _*• ^ a*' 33 «< 3 fc « Table VI.—CALCULATED CENTER POINTS OF CLASS I PERSALANE—Continued. CENTER POINTS. 9 H CO II J * 05 p X ro CO CD CO o d* 05 iD © TT ir cd CD iD c rr CO d a> _ I- CO CD CM iD fp rr eg c 05 04 I- 05 X lC X Cl ed 00 CO id cd cd cm cd CO W rr 1^ CO o X 00 rH 1 o HT CO 05 CM rH a rr id ^4 - • CD Cl rr CO rH 05 p iO Cl o 05 o CO X rf CO ID CO rH id h © 00 05 rr CM iO CO 05 hT V- © CD iD c CD iD CO O' iD c ci rH id © CM iD © 00 cd d rr CO o 05 ,_l 04 00 05 05 CD • CO rT iD 05 ID rr X rf . © rt< o 05 X 44 CO rT CM iD CM c o H< CD CM PH CO CM CM 00 CO CD 05 l'- CD CD I> r- id 05 CM 1- CM* O CO CO iD CM i> CO o CO iD X CO . CD o CD rH rH 05 id «d CO CO CM ID CM o o C CM P* X 00 04 C_ Tt» ID CD GO CD cd iC CM iD CM iD 00 C 1^ CM Cl iD 05 o 05 c Tt< CO CD C iD rr CD O P- id cd CD X 05 -d CM CO rH CM iD CM eg 44 CO CO rT c iD C CM O c TT O iD 05 c • CO CO rr l> id id CD cd id os H iD n CM iD CM O GO Cl CD rH CM iD ci rr iO CO CD rH CM so i> iD CM 00 CD CM CM I- -H CO CM CM io ; 7-1 rH iD CM _ • 05 O O -T © ec • CO o O rt rH 05 id' id 05 cm’ cd id ! rH CM iD CM o © 00 05 CO o c O iD CO 1C id lC CM cd CM CD CM CD rr C CO o iD CO o X CM iD X rt< CO iD © cd id co -r C CD CM d ID iC CM X -r CO CD © CD 00 CO C Cl ID 05 CM iD cm’ O) Ph CD rH CM iD CM O ID iD X X iD o O 05 •'T CM X CM id • • © -r (-4 X rH r — 1 CD CM 7—1 p O CM o o CD o rH iO id cm’ 05 X CM CD 1—1 h ii h!e>h eg eg S o « eg 44 ID 0.69 49.31 g c ID CM rr 36.19 9.93 11.01 X Cl CM X x rH iD X X c 05 X r- rr t> CM CD X rr rr id ”0 id id C 9 05 1> cd rt X rr X 05 X CM X 05 H 05 iD o 05 O 05 X rr CD t'- CM X Cl x X rd [> rt CM D4 rr X 05 Cl X 05 ID ID C I- CM l- CM X ID CM CM CM 05 05 c 05 05 x’ CM* C rt X 1— rT CM X Cl c X Cl c 05 c X CD X rH ci l> o 1" cm’ X ID iD CM 1— Cl X c rH X c • CC X c O X X X ID GO rH o* o’ rH rr rr CM CM ID iD X ID iD CD rt rH iD Cl r- T— C 05 X T— CM l> CM ID X 05 c T— O o CM CM rt rr X • 05 CM X CM m ID 05 05 X L- CM O o X X CD 05 c 05 CM X cd CD 05 X CM CM iD CM rr CD rf CD 05 1^ rt rt iD iD rt X iD 05 X CM cm’ I- CD cd rH id cd ci cd X X — iD CM iD iD C 05 CD X P CM C X X CM rt rH X CD O CD cd cd X iD iD CM r— C p X 05 X c O rr CD X ID c c id I-’ CD iD iD iD CM p X o X X X o CM rr CM rT CM* c rT CM CD X r- iD iD CM c 05 X rt « X X CM CD CD X c id id id I> ID rr X iD CM rH o 05 CD p- o o o 05 X X rr X CM o rr id CM cd id iD X iD CM rH o p O r^- X o o 05 X CM rH o o 05 d 05* • ID ID ID CM rH z> «— O p ^ £ O 4) o ■x -r CO o CO 05 Cl N Cl N lO CO H x x -r X X O5 0 lO O X © X X X LO t— O iO X -r cm o oi to p" IO CM c to o c CL 52 tlj H o CL to c3 M fa CL o £ ti 02 O 53 q W &H Ph < 5. Percale: r*H 75.00 25.00 49.93 50.07 O X 75.00 22.74 2.26 46.49 16.05 X Tf It X O x 04 -T T| 05 x T-r r- g X X 05 XXX n CM id X r- X It cc -r 05 Q i- Tf X -f X X X 05 CC x 05 X X X rH id X 05 05 X i- Tf Tf 05 X 05 04 It X X r” CM X X X X CM 04 Tf X CM x c C X X • 05 X C CM X CM X X o 04 X CM Tf Ol Tf X ~r X x* X CM 7 CM d • ’C rH 05 HJ I- CM It £h X X l> X X X X Ol "3 co Tf X — X Tf it X 05 X rH lO T— I— Tf CM o co l> x it X I" X X l" X X X r- rH X X Tf CM X CM IO X CO 05 It X r- Tf CM X Tf 05 Tf X X 4h X It rH 05 X X d X CC X T- CM X CM CM 04 X X It 05 co X 05 04 IT X rt c X CM X 04 X CM Tf Tf It lO GC X X co Tf 05 X 05 co X X rH X X X Tf LO 05 05 Tf X X 1 - X oi 04 co Tf X d •rH X r- 1> X 04 T— X 04 r- X X X X g X x 1^ X Tf It x Tf X 04 Ol CM r- 1— Tf Ol r- W CM* 05 Ol o X I'- It X X X X c c. X r- rH Tf Tf o CM 00 04* -r X X d X 04* CO CM X r- X CM r- fr X X X X X T— X rH X rH x Tf X CO X Tf CM X X r- x c Tf X X X Tf X X X X X* It CM Tf X o X X lO IT o X X X CM It t X o Tf X Tf It X CM Tf Tf d X 1^ I- X r—t X rj 00 X X X It It C X o 04 O H- it! X X T-H 1— Tf X H Ph X O X I- X It o 05 X CM 04 Tf o 7 X X X X o rH X X 0 O 04 X o O It 04 rH X X* —H L- CM X Tf O a* P M ^ i'h O Table VII.— CALCULATED CENTER-POINTS OF CLASS V, PERFEMANE—Continued. 98 CHEMICAL ANALYSES OF IGNEOUS ROCKS. PL lO co n o o> Oh P *o 78 Q o ft 0) Pm : S & -h CO rH Tf a cc oo oi © iO 60.00 50.00 37.43 62.67 rH 10.08 39.92 9.31 40.69 40.16 50.49 9.35 CO . 21.55 28.45 20.35 29.65 43.30 36.45 20.25 04 34.72 15.28 33.65 16.35 47.00 19.88 33.12 rH 50.00 50.00 48.57 51.43 co x -h o o © a 8 rH lC rH 00 CO lO 05 05 C 8 rH o CO 8 id CO CO 00 O CO TS o rH 04 rH r— rr CO 8 CO co ’f vc r— 00 CO rH CO 04 CO rH CO 04 04 8 co cr 05 id 05 04 r— rH rH 04 8 00 CO 04 1- ^T 1 GO CO tH 8 l'* rH © CO r_ rH 04 CO 8 ift C • iC -r C CO o r? iO iO 05 8 05 00 04* C4 04 CO r? r-i 05 99 00 CO rH iC lO 05 CO CO o Tf CO © c yA 00 tr* CO 04 T— 04 r? rH CO rH 6 s 1C lO O rH 05 CO rH a CO 05 i> CO CO CO rH CO 05 o 05 CO u0 rH p 04 04 04 rH 04 rH rH oi rf 05 r- U0 n0 O CO 05 00 T 00 © CO co 00 CO CO rH 04 oi id CO CO LfO rH rH id CO r- rH r— 04 rH 8 rH r- 8 04 CO CO o iO CO rH CO cd - © 00 id CO CO r— 1C rH co H rH | CO II PhIo Ah o a | ’3 "c3 O a o a x> Ah 8 8 8 3 8 8 3 s. 00 05 CO CO l> GO od co oi N H CO 8 s co s s rH rH r-l CO 05 CO O C? CO CO 05 © u- o rH rH CO iC CO O O I'- 04 CO © rH oi to cd co rH rH 04 rH u0 25.00 75.00 33.42 66.58 rH 5.04 19.96 13.96 61.04 36.03 53.97 10.00 CO 10.78 14.22 30.52 44.48 _ 39.10 39.15 21.75 04 17.36 7.64 50.48 24.52 42.75 21.48 35.79 rH 25.00 75.00 52.85 47.15 g .2 n -M> 0) «*> a» G w * rH O &! as ^ X be - 2 & C/2 U) O O tUD G 05 o c3 0 Ld £h pin « C) O O ^ by OQ S G oj O o3 G W fe fd •< .9 OQ Ah O ° V sc O IS O Table VII.—CALCULATED CENTER-POINTS OF CLASS V, PERFEMANE—Continued. CENTER POINTS 99 CLjO iC C-> c o O T? 03 CO 5. Percalcic. - 100.00 44.55 55.45 4. Docalcic. CO 25.19 74.81 40.74 17.78 41.48 9.00 13.11 77.89 42.43 9.25 5.14 43.18 rH 18. 77 81.23 44.24 10.72 45.04 3. Calcimine. lO 50.25 49.75 36.95 35.47 27.58 8.97 39.23 51.80 38.47 27.69 5.12 28.72 CO 18.72 27.27 54.01 40.10 19.25 10.70 29.95 29.33 14.25 56.42 41.90 10.06 16.76 31.28 rH 40.94 59.06 43.86 23.39 32.75 2. Domiric. iO 75.18 13.76 33.17 53.07 13.76 13.71 59.92 14.62 35.25 42.30 7.83 14.62 CO 29.25 42.62 15.60 37.61 30.08 16.71 15.60 3. 15.67 15.08 15.45 Fe 2 0 3 . 3. 31 3.95 2. 64 FeO. 3. 84 3. 49 3. 53 MgO. 3.81 4. 50 4. 37 C’aO. 5.18 5.30 4.91 Na 2 0. 3. 88 3. 21 3.56 k 2 o. 3.13 2. 91 2. 81 h 2 o+. 1.42 1. 97« 1.52 H.,0 —. 0. 36 0. 40 Ti0 2 . 1.03 0. 55 0. 60 TA. 0. 37 0. 22 0. 22 MnO. 0. 22 0.10 0.10 100. 00 100. 00 100. 00 a Including about 0.40 per cent of hygroscopic water. These results, it will be evident, are very closely alike, though, as will be seen later, the average rock according to my calculations and that according to Clarke’s do not fall in the same subrang of the new system of classification, I belonging in aker- ose, but II and Ill in tonalose, though all three are transitional in character. The most marked difference between them is in the silica, mine being notably lower than the other two. This is perhaps to be ascribed to the fact that I have probably included in my data more analyses than Clarke has of the more lenadic or more femic rocks, a great many of which have appeared since the date of Clarke’s first estimate. The still higher silica in III, however, would seem to imply that the rocks of the United States are, on the whole, somewhat more quaric (siliceous) than those else¬ where, or possibly that more of these have been analyzed. The somewhat higher figures for MnO in I are to be ascribed to the greater fre- quenc}^ of high percentages for this oxide reported in foreign analyses, the larger part of which are due to the analytical error already spoken of. Clarke’s figures for this are probably nearer the truth, and if correction be made for this the amount of alumina shown in I would be correspondingly increased. On the other hand, the alumina of I is certainly a trifie too high, since I included in my data some analyses, otherwise good, in which Ti0 2 and P 2 0 5 had not been determined (rating A3), and in which they have been weighed with the alumina. Some Si0 2 is also included in many of the A1 2 0 3 determinations. Ti0 2 is also probably somewhat too high in I. Criticisms of this sort might be made in regard to nearly all the constituents, and corrections of a greater or less degree of probable correctness could be applied in CALCULATION OB' AVERAGE ROCK. 109 each case. But all three results are admittedly but first approximations; and, until a sufficiently large body of excellent or good analyses is available—analyses, that is, in which all the important constituents have been determined—we can arrive at but a very rough approximation to the truth. It must also be remembered that the'foregoing estimates are based on the assump¬ tion that the number of analyses of any one kind of igneous rock is roughly propor¬ tional to its abundance in nature. This point has already been touched on above, but it is as well to reiterate it, since it is fundamental to any discussion of the composition of the average igneous rock or of that of the crust of the earth. SECOND METHOD. The alternative method is based on the number of analyses found in each class, order, rang, and subrang, and on the assumption that the composition of each division is that of its center point. The composition of each division is then weighted accord¬ ing to the number of analyses present in it, and the average composition then calcu¬ lated by the same process as that of the calculation of the ideal center point of any division (cf. p. 81 et seq.). The process, though apparently complex, is in reality quite simple. This method of procedure is, of course, open to the objection that the average composition of the persalanes and the perfemanes is not at the ideal center point, where the amount of the subordinate mineral group is nil—that is, in the persalanes the actual average rock would lie somewhere between its theoretical center point, where there are no femic minerals present, and the border between it and the dosal- anes, where there are 12^ of femic minerals. Referring to the graphic representation of our system of subdivision," it will be evident (assuming that A represents the salic portion) that this average position will be halfway between the vertical lines 8 and 7 on the left—in other words, where the femic minerals make up 6.25 per cent of the rock. The same reasoning applies, of course, to the perfemanes. In the subsequent calculations, therefore, the appropriate corrections will be made for the compositions of persalane and perfemane, each being assumed to have, respectively, 6i per cent of femic or salic components. It may be observed that the following calculations, as well as those necessary to obtain the results given in tabular form for the data of the preceding discussion and the present calculations, were all carried out with the use of a seven-place table of logarithms, so that the results will be found accurate in the last decimal. In order to arrive at the average composition, both the salic and the femic com¬ ponents must, of course, be considered. The distribution of these, with the compo¬ sition and ratio for each center point, is given in Tables VIII, IX, X, annexed. aCross, Iddings, Pirsson, Washington, Jour. Geol., Vol. X, 1902, p. 578; Quantitative Classification, p. 121. 110 CHEMICAL ANALYSES OF IGNEOUS ROCKS. These figures are used to form equations expressing the relations in each division, as has been explained in the calculation of center points, and the solution of these yields the average composition of the salic and the femic portions of the average magma, which are then combined. Table VIII.—CLASSES. Class. Analyses. Per cent. Sal. Fem. Corrected. Sal. Fem. I 652 38. 11 38.11 35. 73 2. 38 II 676 39. 50 29. 63 9. 87 29.63 9. 87 III 304 17. 77 8. 88 8. 89 8. 88 8. 89 IV 63 3. 68 0. 92 2. 76 0. 92 2. 76 V 16 0. 94 0. 94 0. 06 0. 88 1,711 100.00 77.54 22. 46 75.22 24. 78 Sal Fem = 3.4523 Table IX.—SALIC DIVISIONS. Salic Orders. Order. Analyses. Per cent. Q. F. L. 1 0 0. 00 2 12 0. 74 0. 56 0.18 3 142 8. 70 4. 35 4. 35 4 630 38.60 9.65 28. 95 5 618 37.87 37. 87 6 164 10. 05 * 7.54 2.51 7 42 2. 57 1.29 1.28 8 13 0. 80 0.20 0. 60 9 11 0. 67 0. 67 1,632 100.00 14. 56 — 4.28 80. 38 + 9.34 5.06 «+4.28=Q 10. 28 89. 72 9. 34=F « Since normative quartz and lenad can not coexist, an amount of quartz sufficient to convert the lenad (which is assumed to be orthosilicate) into polysilicate feldspar is deducted from the normative quartz, and the resultant feldspar added to the main portion. CALCULATION OF AVERAGE IJOCK. Ill Salic Rangs. Kang. Analyses. Per cent. KoO "f N aoO. CaO'. 1. Peralkalic. 341 20. 89 20. 89 2. Domalkalic. 509 31.19 23.39 7. 80 3. Alkalicalcic. 588 86. 03 18.02 18. 01 4. Docalcic. 178 10.91 2. 73 8.18 5. Percalcic. 16 0. 98 0. 98 1,632 100. 00 65.03 34. 97 K 2 0-f Na. 2 0 CaO' = /? = 1.8596 Salic Scbrangs. Subrang. Analyses. Per cent. k 2 o. Na^O. Perpotassic. 8 0. 49 0. 49 Prepotassic. 9 0. 55 0. 39 0. 16 Dopotassic. 74 4. 53 3. 40 1.13 Sodipotassic. 529 32. 42 16.21 16. 21 Dosodic. 748 45.83 11.46 34. 37 Presodic . 161 9.87 2.84 7. 03 Periodic. 87 5. 33 5. 33 Percalcic rangs. 16 0. 98 34. 79 64. 23 1,632 100. 00 Na 2 0 K 2 0 = y = 1.8462 Table X.—FEMIC DIVISIONS. Femic Orders. Order. 1. Perpolic 2. Dopolic. 3. Polmitic 4. Domitic. 5. Permitic Analyses. Per cent. Pol. Mit. 40 50. 64 50. 64 31 39. 24 29. 43 9. 81 4 5. 06 2. 53 2. 53 4 0 5. 06 1.26 3. 80 79 100. 00 83. 86 16.14 Mit =

= 05=3.3309 Let q = the molecules of quartz, or of Si0 2 in quartz. Let r = the molecules of orthoclase, or of K./> in orthoclase. Let s = the molecules of albite, or of Na 2 0 in albite. Let t = the molecules of anorthite, or of CaO in anorthite. CALCULATION OF AVERAGE ROCK. 113 Then: 60q = the percentage of quartz. 556r = the percentage of orthoc-lane. 524s = the percentage of albite. 278t = the percentage of anorthite. We shall then have, for the salic portion, the equations: 60q -f- 556r + 524s + 278t = 100 (Class) a q = 556r -j- 524s + 278t (Order) P t=r + s (Rang) y r = s (Subrang) The solution of these yields: Quartz. 10. 28 Orthoclase. 25. 60 Albite. 44.53 Anorthite.19.59 100 . 00 These figures give the chemical composition of the salic portion of tne average rock as: Si0 2 . A1A CaO. Na 2 0 K 2 0. 65.89 20. 56 3.95 5.27 4. 33 For the femic portion of the average rock: 100 . 00 Let a = the molecules of wollastonite, or of CaO in wollastonite. Let b = the molecules of enstatite, or of MgO in enstatite. Let c = the molecules of ferrosilite, or of FeO in ferrosilite. Let f = the molecules of magnetite, or of FeO in magnetite. Let g = the molecules of ilmenite, or of FeO in ilmenite. Then: 116a = the percentage of wollastonite in the femic portion. 100b = the percentage of enstatite in the femic portion. 132c = the percentage of ferrosilite in the femic portion. 232f = the percentage of magnetite in the femic portion. 152g = the percentage of ilmenite in the femic portion. We shall then have the equations: 116a + 100b + 132c + 232f + 152g =100 116a + 100b + 132c = 232 3 . 15.94 15. 47 16. 04 15.81 Fe 2 C> 3 . 1.88 2. 07 3.38 2. 70 FeO. 2. 65 2. 92 3.93 3. 61 MgO. 4. 90 5.40 3.90 4. 47 CaO. 5.02 5.14 5.30 5. 03 Na 2 0. 4. 09 3. 96 3.97 3. 64 K 2 0. 3.35 3. 25 3.21 2.87 Ti0 2 . 0. 48 0. 53 1.06 0. 62 100. 00 100.00 100. 00 100. 00 a As the present purpose is not to calculate the norm, but to determine the chemical composition of the femic portion, the molecules of wollastonite are not combined with equivalents of the hypersthenes to form normative diopside. POSITION OF AVERAGE ROOK. 115 The norms of these calculate out as follows: Quartz. Orthoclase.... Albite. Anorthite Diopside. Hypersthene . Magnetite Ilmenite. I. II. III. IV. 7. 97 7.97 7. 76 7. 76 7. 60 7. 60 11.31 11.31 19. 84 ■77.55 19. 22' •75. 24 18. 98 ■76. 55 17. 24] 77. 59 34.52 -69. 58 33. 46 67. 48 33. 55 ■68. 95. 30. 76 ■66. 28 15.22 14. 80 16.42 18. 28 7. 73^ >18. 82 8. 49) 20. 75 7. 87) >16. 54 8. 67 / 5. 36) ■17. 40] 12.04/ 11.09/ 12. 26 22. 45 I 24 . 76 23. 45 22.41 2.72) [ 3. 63 3. 00) 1 4.01 1.01/ 4. 901 I 6. 91 2.01) 3. 83) 5. 01 0.91 1.18/ 100. 00 100. 00 100. 00 100.00 All of these are in the dosalane class—that is, have salic minerals dominant over femic. I, II, III, however, are in germanare, or have feldspars extreme over quartz, though they all approach the border of austrare, with subordinate quartz, where IV belongs. I and II are domalkalie and belong in monzonase. Ill likewise is domalkalie and falls in monzonase, though the ratio of alkalies to salic lime (1.707) is very close to the border toward andase. IV, on the other hand, is alkalicalcic and belongs in the rang tonalase. All, however, are dosodic, I, II, and III being in akerose, and IV in tonalose. It is obvious from this discussion that the composition of the average rock probably does not fall well within any one subrang of the classification, but that it is near the border and is hence transitional in character. Comparatively slight changes in the data used for its determination will therefore throw it into one or the other division of the system. Its general characteristics are clear, notwithstanding. Salic minerals will constitute about 75 per cent, and it will contain considerable normative quartz, or an excess of silica over that needed to satisfy all the bases. The alkalies and salic lime will be about equal, the former in somewhat greater amount, and soda will be markedly dominant over potash. The femic minerals will form about one-quarter of the rock, and will consist chiefly of hypersthene and diopside, the former preponderating, while the quantity of magnetite and ilmenite will be small. Chemically it will approximate to the four estimates given above. This general position is about what we were led to expect from the former discussion, and it is worthy of note that tonalose and andose are the two subrangs most largely represented by analyses to be found in the tables. Modifications of these estimates must be made in the future, as more satisfactory data become avail¬ able with increase in the number of good analyses and as some knowledge is gained in regard to the relative masses of rocks belonging to the various magmas. For the present, however, we must rest content with the approximations given above, with the understanding that they are subject to the limitations and future corrections already explained. 116 CHEMICAL ANALYSES OF IGNEOUS ROCKS. XjIST of abbreviations. In the case of words etymologically alike, but in different languages, only the English form is given. The other abbreviations used will be self-explanatory. REFERENCES. A.American. A. A. A. S.__American Association for the Advancement of Science. Aarb.Aarbog. Abb .Abhandlung. Ac.Academy, etc. Afh.Afhandlingar. A. G.American Geologist (.Minneapolis). A. J. S.American Journal of Science (New Haven). Ak.Akademie. Ann.Annals, etc. A. R.Annual Report. A. R. U. S. G. S . .Annual Report of the United States Geological Survey (Washington). Att.Atti. B.Bulletin, etc. B. B .Beilage Band. B. C. G. It ......Bolletino del R. Comitato Geologico Italiano (Roma). Ber.Berichte. B. G. S. A.Bulletin of the Geological Society of America (Rochester). B1.Blatt. B. M. C. Z.Bulletin of the Museum of Comparative Zoology (Cambridge). B. S. C. G. Fr_Bulletin de la Service de la Carte Geologique de France (Paris). B. S. G. It.Bolletino della Soeieta Geologica Italiana (Roma). Btr.Beitriige. B. U. S. G. S_Bulletin of the United States Geological Survey (Washington). C.Commission, etc. Cb.Centralblatt. C. I. P. W.Cross, Iddings, Pirsson, Washington. Cong.Congress. C. R.Comptes Rendus. Cte.Carte. I).Deutsc.h. Hep.Department. Ds.Denkschrift. Eg. Kg.Eruptivgesteine des Kristianiagebietes (Kristiania). Erdk.Erdkunde. Erl.Erliiuterung. Exc.Excursion. Finl.Finland. F. K.Foldtani Kozldny (Budapest). Fol.Folio. Fr.France. G.Geology, etc. Ges.Gesellschaft. G. F. F.Geologiske Forening in Stockholm Forhandlingar (Stockholm). G. Kt.Geologische Karte. G. M.Geological Magazine (London). G. S.Geological Survey. H.History. ABBREVIATIONS. 117 Hd.Handlingar. Imp.Imperial. Ind.India. In. Diss.Inaugural Dissertation. Inst.Institute. Int.International. Ir.Irish. It.Italian. J.Journal. Jb.Jahresbericht. J. G.Journal of Geology (Chicago). Jhft.Jahresheft. K.Kaiserlich. Kt.Karte. L-A.Landes-Anstalt. Mag.Magazine. Mem.Memoir, etc. Min.Mineralogy, etc. Mt.Mittheilungen. , Mus.Museum. M. U. S. G. S_Monograph of the United States Geological Survey (Washington). N.New, etc. Nat.Nature, etc. Nf.Naturforscher. Nh.Natural History. N. J.Neues Jahrbuch fiir Mineralogie, Geologie, und Palaontologie (Stuttgart).. N. J. B. B.Neues Jahrbuch, Beilage Band (Stuttgart). No.Number. Notbl.Notizblatt. Nw.Naturwissenschaft. P.Petrography. Ph.Philosophy, etc. Phys.Physical, etc. Pr.Proceedings, etc. Also Preussen. Pt.Part. Q.Quarterly. Q. J. G. S.Quarterly Journal of the Geological Society of London. R.Royal. R-A.Reichs-Anstalt. Rec.Records. Rend.Rendiconti. Rep.Report. Rev.Review, etc. Sb.Sitzungsberichte. Sc.Science. Soc.Society, etc. Sp. K.Spezial Karte. T.Transactions. T. M. P. M.Tschermak’s Mineralogische und Petrographische Mittheilungen (Wien). Un.University etc. Und.Undersdkning, Undersogelse. U. S.United States. U. S. G. S.United States Geological Survey. V.Volume. Ver.Verein. 118 CHEMICAL ANALYSES OF IGNEOUS ROCKS. Vh.Yerhandlungen. Vid.Videnskab. » Wiss.Wissensehaft. Z.Zeitschrift. Z. D. G. G .Zeitschrift der Deutsche Geologische Gesellschaft (Berlin). Z. K.Zeitschrift fur Krystal log rap hie (Miinchen). MINERALS. A . apatite subgroup (apatil j, fluorite, calcite, pyrite, iron, etc.). ab.albite. ac.acmite. am.akermanite. an.anorthite. ap.apatite. C.corundum. cc.calcite. cm.chromite. di.diopside. en.enstatite. F.feldspar subgroup (orthoclase, albite, anorthite). fa.fayalite. fo.forsterite. fr.fluorite. fs.ferrosilite. H.hemic subgroup (magnetite, chromite, hematite). hm.hematite. hy.hypersthene. il.ilmenite. ir...iron (metallic). kp.kaliophilite. ks .potassium metasilicate. L.lenad subgroup (leucite, nephelite, sodalite, noselite). lc.leucite. M.mitic subgroup (magnetite, chromite, hematite," ilmenite, titanite, perofskite, rutile). mt...magnetite. ne.nephelite. no.noselite. ns.sodium metasilicate. 0.olivine subgroup (olivine, ackermanite). ol.olivine. or.orthoclase. org.organic matter. P.pyroxene subgroup (acmite, sodium metasilicate, potassium metasilicate, diopside, wollastonite, hypersthene). pf..perofskite. pr.pyrite. Q.quartz. ru.rutile. so.sodalite. T.tilic subgroup (ilmenite, titanite, perofskite, rutile). tn.titanite. wo.wollastonite. X.rare earths, not identified, insoluble in melted KH (S0 4 ). Z.zircon. ABBREVIATIONS. MISCELLANEOUS. cor.corrected. E.east. lab..laboratory. M.miles. N.north. n.near. n. d.not determined. P.page. p. n. d.present, not determined. Priv. contrib_private contribution (unpublished). R.rang. Ref.reference. S.south. sp. gr.specific gravity. SR.subrang. tr.trace. W.,...west. 119 PART I . SUPERIOR ANALYSES: CLASSIFIED ACCORDING TO THE QUANTITATIVE SYSTEM OF PETROGRAPHY PROPOSED BY CROSS, IDDINGS, PIRSSON, AND WASHINGTON. 121 122 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS I. PERSALANE. RANG 1. PREALKALIC. DARGASE. No. Si0 2 A1A Fe 2 0 3 FeO MgO CaO Na. 2 0 k 2 o h 2 o+ H 2 0- C0 2 Ti0 2 PA MnO BaO Sum Sp. gr. 1 80. 99 12.21 0. 38 0. 60 0. 40 0. 07 0.31 2. 47 2.29 99. 72 A3. Ill 1.350 .120 .002 .008 .010 .001 .005 .026 1 2 79. 69 13. 49 0. 14 2. 08 0. 66 0. 46 0. 08 2.71 n. d. 99. 31 l A3. Ill 1.328 .132 .001 .030 .017 .009 .001 .028 RANG 1. PREALKALIC. DARGASE. 1 81.43 13. 70 1.58 n. d. 0.06 0. 37 1.02 1.28 0. 92 100. 36 A3. Ill 1.357 .134 .010 (.020) .002 .007 .016 .013 2 80. 36 11. 12 1.77 n. d. 0.56 0. 67 1.82 2. 47 1.96 100.73 A3. Ill 1.339 .109 .011 (.022) .014 .012 .030 .026 RANG 1. PREALKALIC. DARGASE. 1 83. 59 5. 42 trace trace trace 3. 44 5. 33 1.37 0. 76 99.91 A3. Ill 1.393 .053 — — — .062 .086 .015 2 76. 93 14. 35 0. 85 0. 23 0.12 1.29 2. 71 0. 60 1.01 1. 71 99. 80 A3. Ill 1.282 .141 .005 .003 .003 .023 .043 .006 RANG 2. ALKALICALCIC. 1 75. 05 13.16 1.63 3. 07 0. 38 1.80 0.92 2. 58 1. 57 100.16 2. 468 A3. Ill 1.251 .129 .010 .043 .010 .032 .014 .027 18° 2 72. 03 14. 87 3.11 2.21 1.37 1.41 0. 78 2. 32 2. 02 trace 100.12 2. 523 A3. Ill 1.201 .146 .020 .030 .034 .025 .013 .024 — f , 20° 3 80. 55 9.87 2.13 n. d. 0.81 2.21 0. 42 2. 43 1.06 99.48 A3. Ill 1.343 .096 .013 (.026) .020 .039 .007 .025 RANG 2. ALKALICALCIC. 1 77.55 14.61 n.d. 2. 21 0. 32 2.12 1.43 1.62 n. d. 0. 57 0. 08 100. 51 A3. Ill 1.293 .143 — .030 .008 .038 .022 .017 .004 .001 RANG 2. ALKALICALCIC. PERSALANE. 123 SUBCLASS I. Q-f-F+L EXTREME OVER C+Z. ORDER 2. DOQUARIC. BELGARE. SUBRANG 1. PREPOTASSIC. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. Q 68.8 or 14.5 ab 2.6 an 0.3 C 8.9 hy 1.9 mt 0.5 Heidenstein, Schwarz wald, Baden. Bunsen’s Lab¬ oratory. A. Schmidt, cf. N. L, 1889, I, p. 95. Porphyry. Q 65.4 or 15.6 ab 0.5 an 2.5 C 9.6 hy 5.5 nit 0.2 Mount Bischoff, Tas¬ mania. H. Sommerlad. A.v. Groddeck, Z. D. G. G., XXXIX, p. 80, 1887. Porphyry. SUBRANG 2. SODIPOTASSIC. Q 68.8 or 7.2 ab 8.4 an 1.9 C 10.0 hy 2. 9 Pine Lake, Ontario. N. N. Evans. F. D. Adams, B. G. S. A., IX, p. 169, 1898. Nodule in gran¬ ite. Q 56.6 or 14.5 ab 15.7 an 3.3 C 4.2 hy 4.4 Grainsgill, Carrock Fell, England. L. J. Spencer. A. Harker, Q. J. G; S., LI, p. 141, 1895. Greisen. SUBRANG 3. PRESODIC. Q 60.3 or 8.3 ab 19. 9 ns 2.9 wo 7.1 Berkeley, California. C. Palache. C. Palache, B. Dep. G. Un. Cal., I, p. 67, 1894. Soda-rhyolite. A1 2 0 3 low? Q 56.3 or 3.3 ab 22.5 an 6.4 C 7.0 hy 0.3 mt 0. 7 hm 0.3 Schwarzthal, Wind- giille Mountains, •Switzerland. Serda. C. Schmidt, N. J. B. B., VI, p. 432, 1886. Porphyry. Schistose. Not fresh. SUBRANG 1. PREPOTASSIC. Q 53.9 or 15.0 ab 7.3 an 8.9 C 5.7 hy 5.4 mt 2.3 Angera, Lago Mag- giore, Italy. L. Ricciardi. L. Ricciardi, Att. Ac.Gioen., XVIII, p. 9, 1885. Porphyry. Q 53.1 or 13.3 ab 7.8 an 7.0 C 8.6 hy 4.7 mt 4.6 Invorio Superiore, Lago d’Orta, Italy. L. Ricciardi. L. Ricciardi, Att. Ac. Gioen., XVIII, p. 21, 1885. Porphyry. Q 61.6 or 13.9 ab 3.7 an 10.8 C 2.6 hy 5.5 Garrarus, County Waterford, Ireland. Jones and Rob¬ inson. F. W. C. Reed, Q. J. G. S., LVI, p. 679, 1900. Felsite. SUBRANG 2. SODIPOTASSIC. • Q 56.7 or 8.5 ab 11.5 an 10. 6 C 6.7 hy 4.8 Eruption 1888-89, Vulcano, ^Eolian Islands. L. Ricciardi. G. Mercalli, Gior. Min., Ill, p. 107, 1892. Quart z-andesite. Bomb. PA high? SUBRANG 3. PRESODIC. Q 60.5 or 3.3 ab 7.9 an 7.5 C 8.8 hy 9.4 Alausi, Ecuador. J. Siemiradzki. J. Siemiradzki, N. J., B. B., IV, p. 209, 1886. Dacite. Q 59.6 or 4.5 ab 20.4 an 8.3 C 0.5 hy 4.7 Oberhunden, West¬ phalia. Bomer. 0. Miigge, N. J., B.B., VIII, p.568,1893. Quartz-kerato- phyre. Not fresh. 124 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS I. PERSALANE—Continued. RANG 3. PRECALCIC. No. Si0 2 A1 2 0 s Fe 2 0 3 FeO MgO CaO Na 2 0 1 o M h 2 0+ H 2 0- C0 2 Ti0 2 PA MnO BaO Sum Sp. gr. 1 79.92 5.61 3. 38 n. d. 0. 04 2. 45 0. 30 1.19 7.38 trace 1 100.27 A4. IV 1.332 .055 .021 (.042) .001 .044 .005 .013 j CLASS I. PERSALANE. RANG 1. PERALKALIC. AIASKASE. 1 A3. Ill 78. 04 1.301 11.98 .117 0. 23 .001 0. 60 .008 0. 04 .001 0. 62 .011 0.24 .004 6. 83 .072 1.41 100.01 RANG 1. PERALKALIC. ALASKASE. 1 79. 75 10. 47 0.64 0. 92 0.13 0.15 1.36 6. 01 0. 60 0. 08 0.15 trace trace 0. 06 100. 37 Al. I 1.329 .103 .004 .012 .003 .003 .022 .064 .002 — — 2 78. 83 10. 88 1.63 n. d. 0. 35 0. 22 2.13 5. 31 0.32 99. 67 A3. Ill 1.314 .106 ..010 .020 .009 .004 .034 .057 3 76.10 12.95 0. 65 0. 09 0.14 0.12 2.36 6. 50 0. 48 0.17 none 0. 07 0. 02 trace 99. 65 ! A2. II 1.268 .'27 .004 .001 .004 .002 .038 .069 .001 — — 4 75. 39 13. 65 0. 38 0.18 0.15 0.51 1. 84 6. 81 1.13 trace trace 0.14 100.18 A2. II • 1.257 .134 .002 .003 .004 .009 .029 .072 — .002 5 74.40 14.43 0. 22 0. 89 0.07 0. 58 1. 76 6.56 0.92 0.15 0.12 0. 22 trace trace 100. 36 Al. I 1.240 .142 .001 .012 .002 .010 .028 .070 .001 .002 _ 6 73. 23 12. 73 0. 99 0.16 0. 22 0. 61 1.91 5.17 4.51 0. 53 0. 09 0. 02 trace 0.02 100.19 Al. I 1.221 .125 .006 .002 .006 .010 .030 .056 .001 — — 7 74. 69 16.21 trace 1.16 0. 48 0. 28 1.18 3.64 1.23 0. 58 99. 55 2.64 B3. IV 1.245 .159 — .017 .012 .005 .019 .038 .008 8 76. 43 11.69 0. 57 0. 62 0. 30 trace 1.62 6. 96 0. 84 0. 08 trace 0. 09 99. 30 2. 600 B2. Ill 1.274 .114 .004 .008 .008 .026 .074 — .001 9 76. 06 11. 36 2. 23 n. d. 0.12 0.58 1.17 7.27 0. 90 0.12 99. 81 2. 613 A3. Ill 1.268 .ill .014 (.028) .003 .010 .019 .078 .002 « 10 75. 27 12. 92 1.89 n. d. 0. 47 0. 32 1.14 6.48 0. 61 trace 0.29 « 100. 63 2.66 A3. Ill 1.255 .126 .012 (.024) .012 .005 .018 .069 — .004 11 76. 94 12. 20 2. 34 n. d. 0. 32 0.57 1.47 4.65 1.15 99.64 \ 2.451 A4. IV 1.282 .120 .014 (.028) .008 .010 .024 .050 17° 12 75. 30 11.40 5.40 n. d. 0. 60 0. 75 1.45 6.13 trace 101. 03 2. 67 B4. V 1.255 .112 .034 (.068) .016 .013 .023 .065 — ! PERSALANE-MAGDEBURGtOSE. 125 ORDER 2. DOQUARIC. BELGARE—Continued. SUBRANG 1. PREPOTASSIC. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. Q 60.0 di 1.7 or 7.2 hy 4. 8 ab 2.6 an 10.3 Between Livan and tisku, Persia. V. Steinecke. V. Steinecke, Z. Ges. Nw. Halle,VI, p. 70, 1887. Pitchstone. ORDER 3. QUARFELIC. COLUMBARE. SUBRANG 1. PERPOTASSIC. Q 48.9 or 40.0 ab 2.1 an 3.1 C 3.1 by 1.0 rnt 0.2 Riggenbach Thai, Schtvarzwald, Baden. Bunsen’s Lab¬ oratory. A. Schmidt, cf. N. J., 1889, I, p. 95. Porphyry. SUBRANG 2. DOPOTASSIC. MAGDEBURGOSE. ZrO» S NiO SrO Li 2 0 0.05 none none trace trace Q 47.8 or 35. 6 ab 11.5 an 0.8 C 1.4 hy 1.4 mt 0.8 Near Blowing Rock, Watauga County, North Carolina. W. F. Hille- brand. A. Keith, B. U. S. G. S., 168, p. 52, 1900. Quartz-por¬ phyry. Q 43.9 or 31.7 abl7.8 an 1.1 C 1.1 hy 2.9 Pine Lake, Ontario. N. N. Evans. F. D. Adams, B. G. S. A., IX, p. 169, 1898. Granite. NiO l none Q. 37.1 or 38.4 ab 19.9 an 0.6 C 1.8 hy 0.4 mt 0.2 hmO. 5 Felch Mountain, Michigan. H. N. Stokes. H. L. Smith, M. U. S. G. S., XXXVI, p. 389,1899. Granite. Q 37. 7 or 40.0 abl5.2 an 2.5 C 2.3 hy 0.6 mt 0.5 Silver Cliff, Colorado. L. G. Eakins. W. Cross, 17A.R.U.S.G.S., II, p. 324, 1896. Rhyolite. F SrO Li.>0 0.04 none trace Q 37.3 or 38.9 ab 14.7 an 2.8 C 3.5 hy 1.7 mt 0.2 Currant Creek Can¬ yon, Pike’s Peak, Colorado. W. F. Hille- brand. E. B. Mathews, B. U. S. G. S., 148, p. 160, 1897. Granite. SrO Li 2 0 none trace Q 40.7 or 31.1 ab 15.7 an 2.8 C 3.0 hy 0.6 mt 0.5 hm 1.1 Buena Vista Peak, Amador County, California. W. F. Hille- brand. H. W. Turner, J. G., Ill, p. 407, 1895. Rhyolite. Also in 17 A.R.U.S.G.S., I, p. 721,1896. Li 2 0 0.10 Q 51.8 or 21.1 ab 10.0 an 1.4 C 9.9 hy 3.4 Cam Brea Hill, Red¬ ruth, Cornwall. Phillips. J. J. H. Teall, Brit. Petrog., p. 314, 1888. Granite. A1 2 0, high? Alkalies low? so 3 0.10 Q 39.7 or 41.1 ab 13.6 C 1.4 hy 1.3 mt 0.9 Alvensleben, n. Mag¬ deburg, Saxony. Hampe. F. Klockmann, Jb. Pr. G. L-A., XI, p. 192, 1892. Quartz-por¬ phyry. Q 38.1 or 43.4 ab 10.0 an 2.8 C 0.4 hy 4.0 Klinzerberg, n. Mag¬ deburg, Saxony. Bodliinder. F. Klockmann, Jb. pr. G. L-A., XI, p. 180, 1892. Quartz-por¬ phyry. B0O3 1.24 Q 41.2 or 38.4 ab 9.4 an 1.4 C 3.5 hy 4.4 Rican, n. Prague, Bohemia. K. Preis. F. Katzer, Jb. Wien. G. R-A., XXXVIII, p. 411, 1898. Tourmaline- pegmatite. 3 meters from contact. Q 47.5 or 27.8 abl2.6 an 2.8 C 3.7 hy 4.5 Arona, Lago Mag- giore, Piedmont. L. Ricciardi. L. Ricciardi, Att. Acc. Gioen. Catania, XVIII, p. 7, 1885. Porphyry. Q 36.7 or 36.1 ab 12.0 an 3.6 C 1.1 hyll.4 St. Thomas Mount, Madras, India. P. C. Roy. T. H. Holland, Mem. G. S. India, XXAHII, p. 142,1900. Charnockite (hypersthene- granite). Sum high. 126 CHEMICAL ANALYSES OF IGNEOUS ROCKS. CLASS I. PERSALANE—Continued. RANG 1. PERALKALIC. ALASKASE. No. Si0 2 Al-A FeA FeO MgO CaO Na 2 G k 2 o h 2 o+ h 2 o- co 2 Ti0 2 PA MnO BaO Sum Sp. gr. 1 77.28 11.24 1. 74 none 0. 21 trace 3.10 4. 55 1.16 0.17 trace 0. 02 99. 47 A2. 11 1.288 .110 .011 — .005 — .050 .049 — — 2 73. 85 13.15 3. 27 0.36 0. 32 0. 82 2. 29 5. 42 0. 71 0. 06 0. 09 100. 34 A2. II 1.231 .129 .020 .005 .008 .014 .037 .058 — .001 3 79. 57 11.41 0. 20 0. 70 trace 0. 21 3.46 3. 52 0.61 0.18 0.11 trace none 0. 05 100. 02 Al. I 1.326 .112 .001 .010 — .003 .056 .037 .001 — — — 4 74. 62 10.01 3. 85 1. 72 0. 33 2. 43 3. 33 3. 38 0. 24 99. 91 A3. Ill 1.244 .098 .024 .024 .008 .043 .053 .036 5 77. 05 12. 84 0. 56 0. 14 trace 0.57 2. 81 5. 52 0. 48 0. 22 none 0.12 none none none 100. 31 Al. I 1.284 .126 .004 .002 — .010 .045 .059 .002 — — — 6 76. 87 12. 52 0. 67 none 0. 09 0.49 2. 47 5. 78 0. 52 0. 25 0.11 0. 05 99. 82 A2. II 1.281 .122 .004 — .002 .009 .040 . 062 .001 — — — 7 75. 52 14. 11 1. 74 0. 08 0.10 0. 78 3. 92 3.63 0.39 none none 100.38 Al. I 1.255 .138 .011 .001 .003 .014 .063 .039 — — 8 77.03 12. 00 0. 76 0. 86 0.04 0. 80 3. 21 4. 92 0.30 0. 14 0. 13 trace trace trace 100. 55 • 0.15 Al. I 1.284 .118 .005 .012 .001 .014 .051 .053 .002 — — — 100.40 9 77. 02 11.63 0.32 1.09 0.14 1.24 2.85 5. 21 0.35 trace 99. 85 A3. Ill 1. 284 .114 .002 .015 .004 .022 .046 . 056 10 73. 11 13.16 0. 62 0. 23 0.19 0. 54 2. 85 5.10 4.05 0.14 99. 99 A3. Ill 1.219 .129 .004 .003 .005 .010 .046 . 055 .002 11 77. 33 12. 55 0. 91 n. d. 0.10 0.17 3.19 4. 80 0. 53 0.15 none 0. 09 trace trace trace 99. 82 A2. II 1.289 .123 .005 (0.10) .003 .003 .051 .051 .001 — — — 12 75. 84 13. 38 1.45 n. d. 0.10 0. 07 3. 33 4. 73 0. 71 0. 18 none 0. 09 trace trace trace 99. 88 A2. II 1.264 .131 .009 (0.18) .003 .002 .053 .050 .001 — — — 13 77. 68 11. 81 0. 72 0.51 0.18 0. 72 2. 96 5. 00 0. 27 0.04 0.14 0. 10 trace 100.13 A2. II 1.295 .116 .005 .007 .005 .013 .048 .053 .002 .001 — 14 74.24 14. 50 1.27 0. 67 0. 25 0. 11 3.00 3. 66 2.04 0. 20 0. 07 0. 06 0.18 100.28 Al. I 1.237 .142 .008 .008 .006 .002 .048 .039 .003 .001 .001 .001 15 71.33 11.18 3.96 1.45 0. 88 2. 10 3.51 3. 49 0.92 0. 74 0. 12 trace 0.32 0.03 100.16 Al. I 1.189 .100 . 025 .020 .022 .038 . 056 .037 .002 — .005 — 16 81.08 11.45 n. d. 0.21 trace 0. 46 2.30 3. 64 0. 60 99. 74 A3. Ill 1.351 .112 — .003 — .009 .037 .039 17 74. 54 14. 86 2. 53 0. 23 trace 0. 29 3. 49 3. 73 O'. 87 trace 100.54 2. 66 A3. Ill 1.242 .146 .016 .003 — .005 .056 .039 — PERSALANE —ALASKOSE. 127 ORDER 3. QUARFELIC. COLUMBARE—Continued. SUBRANG 3. SODIPOTASSIC. ALASKOSE. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. Q 41.3 or 27.2 ab 26.2 C 1.1 hy 0.5 hm 1.7 Fox Islands, Maine. Magruder and Jones. G. 0. Smith, Geol. of Fox Islands, In. Diss., 1896, p. 51. Aporhyolite. Q 37.5 or 32.2 . ab 19.4 an 3.9 C 2.0 hy 0.8 nit 1 .2 hm 2.4 Monterey, Franklin County, Pennsyl¬ vania. L. G. Eakins. G. H. Williams, B. U. S. G. S., 148, p. 81, 1897. Quartz-por¬ phyry. Not described. SrO trace Q 45.2 or 20.6 ab 29.3 an 0.8 C 1.7 hy 1.1 mt 0.2 Sam Christian Mine, Montgomery County, North Carolina. W. F. Hille- brand. J. S. Diller, A. J. S., VII, 341, 1899. Rhyolite. Q 39.0 or 20.0 ab 27. 8 an 2.5 di 1.8 wo 3.1 mt 5.6 Waushara, Wiscon¬ sin. S. Weidman. S. Weidman, Bull. Ill, G. Nh. S. Mich., p. 2, 1898. Granite. S SrO none none Q 38.4 or 32.8 ab 23.6 an 2.8 C 1.2 mt 0.4 hm 0.3 Nettie Mine, Butte, Montana. H. N. Stokes. W. H. Weed, J. G. VII, p. 739, 1899. Aplite. Q 38.9 or 34.5 ab 21.0 an 2.5 C 1.1 hy 0. 2 mt 0. 7 Nettie Mine, Butte, Montana. H. N. Stokes. W. H. Weed, J. G., VII, p. 739,1899 Aplite. FeS 2 0.11 Q 36. 7 or 21.7 ab 33.0 an 3.9 C 2.2 hy 0.3 mt 0. 2 hm 1. 6 Obsidian Cliff, Yel¬ lowstone National Park. J. E. Whitfield. J. P. hidings, 7 A. R. U. S. G. S., p. 282, 1888. Obsidian. F Li 2 0 0.36 trace Q. 37.5 or 29.5 ab 26> 7 an 3^ 9 mt 1 . 7 Sentinel Point, Pikes Peak, Colorado. W. F. Hille- brand. E. B. Mathews, B. U. S. G. S., 150, p. 177, 1898. Biotite-granite. Q 37.3 or 31.1 ab 24.1 an 3.3 di 2.7 hy 1.7 mt 0.5 Platte Canyon, Jeffer¬ son County, Colo¬ rado. H. N. Stokes. E. B. Mathews, B. U. S. G. S., 148, p. 179, 1897. Granite. Q 35.3 or 30. 6 ab24.1 an 2.8 C 1.8 hy 0.5 nit 0.9 Rosita, Colorado. L. G. Eakins. W. Cross, 17 A. R. U. S. G. S., 324, 1896. Pitchstone. SrO LioO trace trace Q 40.1 or 28.4 ab 26. 7 an 0.8 C 1.8 hy 0.2 hm 0.9 Tordrillo Mountains, Alaska. H. N. Stokes. J. E. Spurr, A. G., XXV, p. 231, 1900. Alaskite. SrO LioO trace trace Q 38.3 or 27.8 ab 27.8 an 0.6 C 2.7 hy 0.3 hm 1.5 Tordrillo Mountains, Alaska. H. N. Stokes. J. E. Spurr, A. G., XXV, p. 229, 1900. Tordrillite. Q 39.4 or 29.5 ab 25.2 an 3.6 hy 0. 7 mt 1.2 Pyramid Peak, Eldo¬ rado County, Cali¬ fornia. G. Steiger. W. Lindgren, A. J. S., Ill, p. 306, 1897. Granitite. so 3 SrO LLO 0.03 trace none Q 42.0 or 21.7 ab 25.2 an 0.6 C 5.4 hy 0.6 mt 1 . 9 Near Willow Lake, Plumas County, California. W. F. Hille- brand. J. S. Diller, B. U. S. G. S., 148, p. 192, 1897. Rhyolite. Zr0 2 Cl FeSo Cod Cu and none 0.09 0.04 none Pb none Q 33.8 or 20.6 ab 29.3 an 1 . 9 di 4.8 hy 1.0 mt 4.6 hmO. 8 Mazaruni District, British Guiana. J. B. Harrison. J. B. Harrison, Priv. Contrib: Quartz-por¬ phyry. Q 52.4 or 21. 7 ab 19.4 an 2. 6 C 2.8 hy 0.4i Berufiordskard, Ice¬ land. C. W. Schmidt. C. W. Schmidt, Z.D.G. G., XXXVII, p. 776, 1885. Liparite. Li 2 0 trace Q. 39.7 or 21.7 ab 29.3 an 1.4 C 4.7 mt 0.7 hm 2.0 Botallack, Cornwall. Phillips. J. J. H. Teall, Brit. Petr., p. 314, 1888. Granite. 128 CHEMICAL ANALYSES OF IGNEOUS ROCKS. CLASS I. PERSALANE—Continued. RANG 1. PERALKALIC. ALASKASE—Continued. No. Si0 2 o Fe 2 0 3 FeO MgO CaO Na 2 0 o N 'A h. 2 o+ H 2 0— co 2 Ti0 2 P,o 5 MnO BaO Sum Sp. gr. 18 73. 00 15. 20 1.86 n. d. 1.01 0. 56 3.44 4.14 1.25 100.46 A3. Ill 1.233 .012 (.024) .025 .010 .055 .044 19 77. 20 12.11 1.61 n. d. trace 0.14 3. 87 4. 07 0. 36 0.10 99.46 A3. Ill 1.287 .119 .010 (.020) — .002 .062 .043 .001 20 76. 73 12. 70 1.38 n. d. 0.12 0. 50 3.17 4.55 0. 57 0. 24 99. 96 A2. II 1.279 .125 .009 (.018) .003 .009 .051 .048 .003 21 76. 26 12. 06 1.14 0. 66 0. 06 0.69 2. 89 4.50 0. 71 0.40 0. 25 99. 62 A2. II 1.271 .118 .007 .009 .002 .012 .047 .048 .005 .004 22 72.93 13. 87 1.94 0. 79 0. 51 0. 74 3. 68 3. 74 1.18 0. 50 0.14 100. 02 A2. II 1.216 .136 .012 .011 .013 .013 .060 .039 .006 .002 23 75.44 10. 99 2. 33 0. 93 0. 25 1.24 2. 72 4.98 1.06 0.47 100. 41 A3. Ill 1.257 .108 .014 .013 .006 .022 .043 .054 .007 24 71.01 11.86 3.92 2. 34 0. 26 1.24 2. 59 3. 02 0.93 0.09 0. 85 99. 89 A2. II 1.184 .116 .024 .032 .007 .022 .042 .032 .005 25 76. 56 12. 75 0. 21 0.61 0.14 0. 46 3. 38 4. 85 0. 68 99. 64 A3. Ill 1.276 .125 .001 .008 .004 .008 .055 .052 26 74. 82 13.63 0. 97 0. 83 0. 08 0. 87 3. 03 4. 81 0. 82 99. 86 A3. Ill 1.247 .134 .006 .011 .002 .006 .048 .051 27 77.68 12.95 0. 96 0. 37 0/21 .030 3.18 4.37 0. 71 trace 100.73 A3. Ill 1.295 .127 .006 .005 .005 .005 .051 .047 — 28 77.48 11.84 0. 57 1.63 0. 27 0. 43 2. 48 3. 73 1. 56 0. 23 100.22 A2. II 1.291 .116 .004 .022 .007 .008 .040 .039 .002 29 76.44 13. 78 0. 97 0.07 0.34 0. 75 2. 76 3. 50 0. 38 0. 33 0.51 100. 08 A2. II 1.274 .135 .006 .001 .009 .013 .044 .037 .004 30 75. 25 13.36 0. 28 1.23 •0.02 0. 65 2.91 4. 55 0.64 0.18 99. 07 B3. IV 1.254 .131 .002 .017 .001 .011 .047 .049 .001 31 76.10 15.95 trace none 0.11 0. 23 2. 90 3.27 1.16 99. 72 2. 673 A3. Ill 1.268 . 156 — — .003 .004 .047 .035 32 77.59 12. 75 0. 67 none 0.16 0.04 2. 56 3. 99 1.54 0.63 trace trace 0.10 100. 10 2.511 A2. II 1.293 .125 .004 — .004 .001 .041 .042 .008 — — .001 PERSALANE-ALASKOSE. 129 ORDER 3. QUARFELIC. COLUMBARE—Continued. SUBRANG 3. SODIPOTASSIC. ALASKOSE—Continued. Inclusive. Norm. Locality. Analyst. Reference. 1 Author’s name. Remarks. Q 34.2 or 24.5 ab 28.8 an 2.8 C 4.1 hy 5.6 lie Longue, Brittany, France. Not stated. C. Barrois, Guide Exc., VIII, Cong. G., VII, p. 21 , woo: Aplite. Q 38.0 or 23.9 ab 32.5 an 0.6 C 1.2 hy 2.7 Kroftkollen, Dram- men, Norway. R. Mauzelius. W. C. Brdgger, Z. K., XVI, p. 77, 1890. Quartz-p r- phyry. Q 38.2 or 26.7 ab26.7 an 2.5 C 0.7 hy 2.7 Hennum, Norway. R. Mauzelius. W. C. Brogger, Z. K., XVI, p. 77, 1890. Aplitic grano- phyre. Q 40.6 or 26.7 ab 24.6 an 3.3 hy 0.2 mt 0.9 il 0.8 hm 0.4 Sundsvall, Sweden. H. Santesson. P. J. Holmquist, Afh. Sv. G. Und., No. 181, p. 45, 1899. Granite-por¬ phyry. Dried at 110°. Q 35.0 or 21.7 ab 31.4 an 3.6 C 2.5 hy 1.3 mt 1.2 hm 1.1 il 0.9 Rodo, Sweden. H. Santesson. P. J. Holmquist, Afh. Sv. G. Und., No. 181, p. 14, 1899. Rapakiwi gran¬ ite. Dried at 110°. Q 38.2 or 30.0 ab 22.5 an 3.1 di 1.3 wo 0.6 mt 3.2 Kastagropen, n. Karl- shamn, Scania, Sweden. H. Santesson. H. Biickstrom, K. Sv. Vet. Ak. Handl., XXIX, p. 18, 1897. Granulite (crushed granite). Cl F 0.88 0. 93 Q 43.3 or 17.8 ab 22.0 an 0.6 C 4.2 hy 1.8 mt 5.6 ap 2.0 Block on Dago Is¬ land, Esthonia, Russia. Schridde. J. .T. Sederholm, T. M. P. M., XII, p. 21, 1891. Rapakiwi gran¬ ite. Cl high? F high? Q 36.4 or, 28.9 ab28.8 an 2.2 C 1.0 hy 1.4 mt 0.2 Grosssachsener Thai, Baden. Phookan. K. Futterer, Mit. Bad. G. L-A.,II, p. 41, 1893. Granite. Q 38.0 or 28.4 ab 25.2 an 1. 7 C 3.0 hy 0.9 mt 1.4 Standenbiihl, n. Heil- igkreuz, Baden. Beckmann. K. Futterer, Mit. Bad. G. L-A.,11, p. 41, 1893. Granite. Q 41.5. or 26.1 ab 26. 7 an 1.4 C 2.5 hy 0.5 mt 1.4 Waterfall, Trvberg, Schwartzwald, Baden. L. McCay. G. H. Williams, N. J. B. B., II, p. 609, 1883. Quartz-por¬ phyry. F Li 2 0 trace trace Q 46.6 or 21.7 ab 21.0 an 2.2 C 3.0 hy 3.1 mt 0.9 Epprechtstein, Fich- telgebirge, Bavaria. A. Bottger. F. v. Sandberger, Sb. Munch. Ak., XVIII, p. 466, 1888. Lithionite- granite. FeS 2 0.25 Q 46.8 or 20.6 ab 23.2 C 5.4 hy 0.8 mt 0. 2 hm 0. 8 ap 1.3 Lindenstein, Hesse. R. Marzahn. Chelius and Klemm, Erl.G.Kt., Hessen, IV, p. 42, 1896. Granite. LioO trace Q 38.5 or 27.2 ab 24.6 an 3.1 C 2.4 hy 2.0 mt 0.5 Schneeberg, Fichtel- gebirge, Bavaria. A. Bottger. F. v. Sandberger, Sb. Munch. Ak., XVIII, p. 466, 1888. Granite. •• Q 46.4 or 19.5 ab 24.6 an 1.1 C 7.1 hy 0.3 Omeo, Victoria, Aus¬ tralia. A. W. Howitt. A. W. Howitt, T.R.Soc. Viet., XXIV, p.110,1888. Muscovite- granite. Dried at 100°. HjjO-O.18. so 3 . 0.07 Q 47.3 or 23.4 ab 21. 5 an 0.3 C 4.2 hy 0.4 hm0.7 ru 0.6 Omahu, Hauraki, Auckland Province, New Zealand. P. Holland. P. Holland, Q. J. G. S., LV, p. 467, 1899. Rhyolite. 14128 — No. 14—03 9 130 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS I. PERSALANE—Continued. RANG 1. PERALKALIC. ALASKASE. No. Si0 2 ai 2 o 3 ' FeA FeO MgO CaO Xa.,0 k 2 o H,0+ H 2 0- co 2 Ti0 2 PA MnO BaO Sum Sp. gr. 1 75.19 13. 77 0. 61 1.37 0. 09 0. 68 3. 83 3. 33 0. 65 none none trace 99.83 Al. I 1.253 .135 .004 .019 .002 .012 .061 .035 — — — 2 74.51 c » 00 -t iH 1.09 trace 0. 47 0.81 4. 38 2. 72 0. 92 none trace none 99. 99 Al. I 1.242 .1 ^ .007 — .012 .014 .071 .029 — — — 3 76. 00 14. 88 0. C5 0.10 0.06 0.19 3.52 2. 77 1.42 0:20 none 0. 04 0.11 trace trace 99. 94 Al. I 1.266 .146 .004 001 .002 .003 .056 . 030 — .001 — — 4 73. 62 12. 22 2.08 4. 03 0. 26 0. 34- 8. 57 2. 57 0. 40 99. 09 BA IV 1.-227 .120 .013 . 056 .007 .006 .058 .027 5 74. 39 15. 55 1.35 n. d. 0. 33 0. 48 3. 79 2.14 1.18 0. 22 99. 43 2. 72 B3. IV 1.240 . 153 .009 (.018) .008 .009 . -161 . 022 .003 6 74. 09 12. 48 2.15 n. d. 1.08 0. 60 5.01 1.52 2. 42 99.35 Bl. V 1.235 .122 .014 (.028) .027 .011 .080 .016 7 72. 78 14.15 0.17 XL d. trace 0.82 4.51 2. 48 4. 35 99. 26 B3. IV 1.213 .139 .001 (.002) — .011 .072 .026 RANG 1. PERALKALIC. ALASKASE. 1 77. 32 11.62 1.57 0. 69 0.80 0. 62 5. 81 0. 99 0. 65 0.34 0.10 100.51 A2. II 1.289 . 114 .010 .010 .020 .011 .093 .010 .004 .001 2 80. 42 9. 22 1.22 0. 62 0. 34 0. 86 4. 50 0.62 0. 66 0. 98 0. 06 0.06 99. 67 2. 652 A2. II 1.340 .090 .007 .008 .009 .015 .072 .006 .001 — 3 QO C — no. Oi 8.01 2.04 n. <1. trace 0.50 4. 53 0.16 1.10 99.91 2. 624 A3. Ill 1.393 .078 .013 (.026) — .009 .072 .002 RANG 2. DOMALKALIC. ALSBACHASE. 1 76. 41 14. 42 0. 48 0. 74 0. 24 1.43 0. 63 3.88 1.02 1.40 100.65 A3. Ill 1.273 .141 .003 .010 .006 .025 .009 .041 2 73. 07 11.78 2. 30 n. d. 0.39 2. 02 1.19 6. 84 2. 24 99. 83 A4. IV 1.218 .115 .011 (.028) .010 .036 .019 .072 3 73.15 16. 74 0. 78 n. d. 0.21 0. 90 1.13 4.58 2. 58 100. 92 2. 436 A3. Ill 1.219 .164 .005 (.010) .005 .(16 .018 .049 4 72. 68 15. 62 0. 95 n. d. trace 0.63 1.17 4.30 2. 90 100.02 2. 229 A3. Ill 1.211 .153 .006 (.012) — .011 .019 .046 5 70. 59 17. 62 1. 74 n. d. trace 1.96 0. 80 5. 10 1.61 99. 64 2.292 A3. Ill 1.177 .173 .011 (.022) — .035 .013 .055 PERSALANE-MIHALOSE. 131 ORDER 3. QUARFELIC. COLUMBARE—Continued. SUBRANG 4. DOSODIC. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. SO s LioO 0.29 0.02 Q 88.2 or 19.5 ab 32.0 an 3.3 C 2. S h.v 2.2 mt 0.9 Madison Plateau, Yel¬ lowstone National Park. J. E. Whitfield. J. P. Iddings, M. U.S.G. S., XXXII, p. 426, 1899. Rhyolite. so 3 Li.O 0.24 0.02 Q 30.1 or 10.1 ab 37.2 an 3.9 C 3.3 hy 1.2 hml.l Echo Peak, Yellow¬ stone National Park. ,T. E. Whitfield. J. P. Iddings, M.U.S.G.S., XXXII, p. 65, 1899. Dacite-por- phyrv. so 3 Cl F trace trace trace Q 44.0 or 10.7 ab 29.3 an 0.8 C 5.8 mt 0.2 hm 0.5 Grizzly Hill, Plumas County, California. H. N. Stokes. II. W. Turner, 1 / th A. R. I . S. (i. S., I, p. 721, 1896. Muscovite- granite. Q 39.3 or 14.0 ab 30.4 an 1.7 C 3.0 hy 6.4 mt 3.0 Pine Mountain, South Mountain, Pennsyl¬ vania. C. H. Hender¬ son. C. H. Henderson, T. A. Inst. Min. Eng., XII, p. 90, 1884. Rhyolite. Q 41.9 or 12.2 ab82.2 an 2.5 C 0.2 hy 3.2 Crosby, Isle of Man. Holland? Dickson and Holland, Pr. Liverp. G. Soc., VI, Pt. I, p. 126, 1889. Microgranite. ■ Q 34.9 or 8.9 ab 41.9 an 3.1 C 1.5 hy 6.4 St. George Monastery, Crimea, Russia. A. Lagorio. A. Lagorio, Exc. VII Cong. G. Int., XXXIII, p. 27,1897. Keratophyre. Q 35.8 or 14. 5 ab 37. 7 an 3.9 C 2.8 Marekanka River, Kamchatka. P. Wenjukoff. P. Wenjukoff, cf. N. J., 1891,1,281. Perlite. SUBRANG 5. PERSODIC. WESTFHALOSE. Q 37.7 or 5.6 ab 48.7 an 3.1 hy 2.0 mt 1.4 hmO. 4 il 0.6 Gubben, n. Roddo, Sweden. H. Santesson. P. J. Holmquist, Afh. Sver. G. End. No. 181, p. 83, 1899. Granite. Dried at 110°. so 3 Org. pO O O -J 4- Q 50.2 or 3.3 ab 37. 7 an 3.3 di 0.7 hy 0.6 mt 1.9 Near Wibbeke, West¬ phalia. Jacobs. 0. Miigge, N. J. B. B., VIII, p. 632, 1893. Quartz-kerato¬ phyre. Dried at 105°. S0 3 from FeS 2 . S trace Q 54.6 or 1.1 ab 37.7 an 1.1 di 1.3 hy 2.8 Hohlinden Quarry, Wiebelsaal, West¬ phalia. Bonier. O. Miigge, N. J. B. B., VIII, p. 616, 1893. Quartz-kerato- phvre. Dried at 105°. SUBRANG 2. DOPOTASSIC. MIHALOSE. Q 54.6 or 22.8 ab 4.7 an 7.0 C 6.7 hy 1.5 mt 0.7 Ivaserngrat, Wind- giille Mountains, Switzerland. C. Schmidt. C. Schmidt, N. J. B. B., IV, p. 432, 1886. Porphyry. Not fresh. Q 34.4 or 40.0 ab 10.0 an 6.7 di 2.9 hy 3.3 McClellan Peak, Washoe, Nevada. F. A. Gooch. Hague and Iddings, B. U. S. G. S., 17, p. 33, 1885. Rhyolite. Near dellenose. so 3 FeS 2 0.12 0.73 Q 46.2 or 27.2 ab 9.4 an 4.4 C 8.3 hy 1.8 pr 0.7 Nagy-Mihaly, Hun¬ gary. K. Murakozy. K. Murakozy, F. K., XXII, p. 54, 1892. Rhyolite. • S0 3 FeSo 0.22 1.55 Q 4 7 .2 or 26.6 ablO.O an 3.1 C 7.9 hy 1.6 pr 1.6 Nagy-Mihaly, Hun¬ gary. K. Murakozy. K. Murakozy, F. K., XXII, p. 54, 1892. Rhyolite. • so 3 FeSa 0.07 0.15 Q 40.6 or 30.6 ab 6.8 an 9.7 C 7.1 hy 2.9 Nagv-Mihaly, Plun- gary. K. Murakozy. K. Murakozv, F. K., XXII, p. 54, 1892. Rhyolite. 132 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS I. PERSALANE—Continued. RANG 2. DOMALKALIC. ALSBACHASE—Continued. No. Si0 2 ALA FeA FeO MgO CaO Na 2 0 o M w h 2 o+ K o 1 co 2 Ti0 2 PA MnO BaO Sum Sp. gr. 6 74.81 13.87 1.68 n. d. 0. 52 1.49 1. 46 4. 68 1.48 99. 99 2.541 A3. Ill 1.244 .136 .011 (.022) .013 .027 . 023 .060 16° 7 74.58 13. 31 1.31 n. d. 0. 54 1.48 1.34 4. 73 2.84 100.13 2.505 A3. Ill 1.243 .130 .008 (.016) .014 .027 .021 .050 19° 8 73.03 13. 51 3.12 n. d. 0.26 1.61 1.52 4. 87 2.03 99. 95 2.563 A4. IV 1.217 .132 .020 (.040) .007 .029 .024 .051 18° 9 72. 98 14. 22 2. 86 n. d. 0. 33 1.35 1.88 5. 61 0. 89 100.12 % A4. IV 1.216 .139 .018 (. 036) .008 .024 .030 .060 RANG 2. DOMALKALIC. ALSBACHASE. 1 71.45 14. 36 2.07 2. 78 1.17 1.53 1.95 3. 28 1.30 99.94 AS. Ill 1.191 .142 .013 .039 .029 .021 .031 .035 2 74. 34 12.97 0. 75 0. 54 0. 86 0. 85 2.49 4. 72 1.11 1.03 none 0.18 0.07 trace 0. 07 100. 06 Al. I 1.239 .127 .005 .007 .022 .015 .040 .050 .002 — — — 3 75. 89 12. 27 1.12 1.37 0. 29 0. 86 3. 23 3.42 0. 82 0.50 none none 100. 06 Al. I 1.265 .120 .007 .019 .007 .015 .052 .036 .006 — — 4 75.34 12.51 0. 42 1.55 0. 32 1.07 3.31 4.17 0.86 none none 0. 07 100. 04 Al. I 1.256 .122 .003 .022 .008 .020 .053 .045 — — .001 5 74.60 13. 41 1.28 0. 30 0. 26 1.08 3.38 4. 50 0. 85 0.16 0. 03 0. 06 0.11 100. 02 Al. I 1.243 .131 .008 .004 .007 .020 .055 .048 .002 — .001 .001 6 70. 29 11.83 1.30 2.08 1.24 2. 30 2. 68 3. 05 1.35 0.10 3. 25 0. 29 0.07 0.12 0. 07 100. 02 Al. I 1.172 .116 .008 .030 .031 .041 .042 .033 .004 — .002 7 74.65 14.11 1.08 0. 29 0. 20 0. 80 2. 81 4.59 1.40 0. 21 trace 0.11 0. 08 100. 33 Al. I 1.244 .138 .007 .004 .005 .014 .045 .049 .003 — .002 8 73. 62 14. 24 0. 93 0. 67 0. 33 1.07 3. 25 4. 28 1.29 0. 21 0.02 0.08 0.10 100.09 Al. I 1.227 .140 .006 .009 .008 .020 .052 .046 .003 .001 .001 9 73.81 13. 93 0.93 0. 46 0. 72 0. 88 2. 80 4. 81 0. 74' trace 0. 62 0. 06 0. 24 0.01 100. 33 Al. I 1.230 .136 .006 .006 .018 .016 .045 .051 .008 — .003 10 75.93 13. 26 1.47 0. 68 none 1.11 3.13 3.19 0.44 0. 51 trace trace 99. 72 A3. Ill 1.266 .130 .009 .010 — .020 .050 .034 — — 11 72.11 13. 71 0.29 0.90 0. 44 1.44 3. 22 3. 33 4.19 99. 63 2. 346 A3. Ill 1.202 .134 .002 .012 .011 .026 .051 .035 12 76.91 12. 52 0. 45 1.04 0. 32 0. 75 3. 21 3.50 0. 72 99. 42 A3. Ill 1.282 .123 .003 .014 .008 .013 .052 .037 PERSALANE-TEHAMOSE. 133 ORDER 3. QUARFELIC. COLUMBARE—Continued. SUBRANG 2. DOPOTASSIC. MIHALOSE—Continued. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. Q 43.0 or 27.8 ab 12.1 an 7.5 C 3.7 hy 4.2 Briga, Piedmont. L. Ricciardi. L. Ricciardi, Att. Ac. Gioen., XVIII, p. 12, 1885. Porphyry. Q 44.0 or 27.8 abll.O an 7.5 C 3.3 hy 3.5 Arolo, Lago Mag- giore, Piedmont. L. Ricciardi. L. Ricciardi, Att. Ac. Gioen., XVIII, p. 9, 1885. Porphyry. Q 39.7 or 28.4 abl2.6 an 8.1 C 2.9 hy 6.0 Ponte di Grata, n. Gozzano, Piedmont. L. Ricciardi. L. Ricciardi, Att. Ac. Gioen., XVIII, p. 14, 1885. Porphyry. Q, 35.0 or 33.4 ab 15.7 an 6.7 C 2.6 hy 5.5 Ben Kassem, n. Menerville, Algeria. Duparc and Pearce. Duparc, Pearce, and Rit¬ ter, Mem. Soc. Phys., Genev., XXXIII, p. 26, 1900. Liparite. SUBRANG 3. SODIPOTASSIC. TEHAMOSE. LioO trace Q 40.9 or 19.5 ab 16.2 an 8.1 C 4.8 hy 6.3 mt 3.0 Sykesville, Maryland. W. F. Hille- brand. G. H. AVilliams, 15 A. R. U. S. G. S., p. 672, 1895. Biotite-granite. ZrOo so 3 Cl SrO LioO 0.05 0.03 none trace trace Q 38.7 or 27.8 ab 21.0 an 4.2 C 2.2 hy 2.4 mt 1.2 Hyde Park Dike, Butte District, Montana. H. N. Stokes. AV. H. AVeed, B. U. S. G. S., 168, p. 119, 1900. Rhyolite. S0 3 LioO 0.28 0.01 Q 41.6 or 20.0 ab 27.2 an 4. 2 C 1.7 hy 1.6 mt 1.6 il 0.9 Mount Sheridan, Yellowstone Na¬ tional Park. J. E. Whitfield. J. P. Iddings, M. U. S. G. S., XXXII, p. 426, 1899. Rhyolite. so 3 Li 2 0 0.42 trace Q 36.1 or 25.0 ab 27.8 an 5.6 C 0.4 hy 3.3 mt 0.7 Elephant’s Back, Yellowstone Na¬ tional Park. J. E. Whitfield. J. P. Iddings, M.U.S.G. S., XXXII, p. 426, 1899. Rhyolite. S0 3 for S. SrO Li.,0 none trace Q 34.7 or 26. 7 ab 28.8 an 5.6 C 0.8 hy 0.7 mt 0.9 hm 0.6 Clipper Mine, Shasta County, California. AV. F. Hille- brand. J. S. Diller, B. U. S. G. S., 148, p. 192, 1897. Rhyolite. Dried at 110°. SrO Li«0 trace? none Q 36.1 or 18.3 ab 22.0 an 11.4 hy 4.4 mt 1.9 il 0.6 Near Buena Vista Peak, Amador County, California. W. F. Hille- brand. H. AV. Turner, 14 A. R. U. S.G.S.,II, p. 484, 1894. Quartz-porph y- ry-schist. Not fresh. SrO LioO trace none Q 38.8 or 27.2 ab23.6 an 3.9 C 3.1 hy 0.5 mt 0.9 il 0.5 Deer Creek Meadows, Tehama County, California. AV. F. Hille- brand. J. S. Diller, B. U. S. G. S., 148, p. 192, 1897. Rhyolite. Dried at 110°. SrO LioO trace none Q 35.5 or 25.6 ab 27.2 an 5.6 C 2.2 hy 0.3 mt 1.4 il 0.5 Slate Creek, Tehama County, California. AV. F. Hille- brand. J. S. Diller, B. U. S. G. S., 148,- p. 192, 1897. Rhyolite. Dried at 110°. Near tosca- nose. ZrOo Cl FeSo CoO Cu Pb trace 0.02 0.02 0.28 trace none Q 36.2 or 28.4 ab 23.6 an 4.4 C 2.4 by 1.8 hm 0.9 il 0.9 Mazaruni District, British Guiana. J. B. Harrison. J. B. Harrison, Priv. contr. Granite. Q 43.3 or 18.9 ab26. 2 an 5.6 C 2.7 mt 2.2 Tamaya, Chile. C. Schwarz. v. Groddeck, Z. D. G. G., XXXIX, p. 249, 1887. Quartz-p or- phyry. Q 36.8 or 19.5 al) 26.7 an 7.2 C 2.2 hy 2.4 mt 0.5 Faro del Caralete, Cabo de Gata, Spain. A. Osann. A. Osann, Z. I). G. G., XLIII, p. 693, 1891. Liparite. Q 42.2 or 20.6 ab 27.2 an 3.6 C 2.1 hy 2.2 mt 0.7 Grosssachsener Thai, Baden. Dieckmann. Iv. Futterer, Mt. Bad. G. L-A., II, p. 41, 1893. Granite. 134 CHEMICAL ANALYSES OF IGNEOUS ROCKS. CLASS I. PERSALANE—Continued. RANG 2. DOMALKALIC. ALSBACHASE—Continued. No. SiO, AlA Fe 2 0 3 FeO MgO CaO Na 2 G k 4 o H 2 0-f tf 2 o- C0 2 TiG 2 PA MnO BaO Sum Sp. gr. 13 72.37 15.18 1. 75 0. 71 1.54 2.01 2.12 3. 54 1.11 100. 33 A3. Ill 1.206 .148 .011 .010 .039 .036 .034 .037 14 72.15 13. 56 1.29 1.48 1.52 2. 25 2. 74 3. 55 1.11 99. 65 A3. Ill 1.203 .133 .008 .021 .038 .040 .044 .038 15 76.12 12.18 1.21 0. 72 1. 12 1. 54 2. 55 3.21 1.51 100.16 A3. Ill 1.209 .119 .007 .010 .028 .028 .041 .034 16 75. 21 12.15 1.74 0. 38 0. 89 1.23 2. 88 4. 25 0. 92 99. 65 A3. Ill 1.254 .119 .011 .005 .022 .021 .047 .046 17 74.41 13. 65 0. 65 0. 95 0. 87 1.16 2.56 3. 98 1.50 99. 73 A3. Ill 1.240 .134 .004 .014 . 022 .021 .041 .042 18 72. 04 15.98 1.08 1. 70 1.08 2.11 2. 22 3.45 0. 66 100. 32 A3. Ill 1.201 .156 .007 .024 .027 .038 .035 .037 19 74. 80 12. 60 1.53 0. 83 0.17 0. 79 2.54 4. 83 1.08 99.17 B3. IV 1.247 .123 .009 .011 .004 .014 .040 .051 20 71.91 13. 51 2.14 1.14 1. 18 2.19 1.58 3. 72 2.39 trace 99. 76 2. 618 A3. Ill 1.199 .132 .013 .015 .030 .039 .026 .039 18° 21 67.12 20. 12 3. 71 0. 28 0. 82 1. 79 1.53 3. 38 1.01 0. 03 99. 84 2. 701 A3. Ill 1.119 .197 .023 .004 .021 .032 .024 .036 22 68. 8 14.9 0.9 4.3 1. 1 1.9 2.7 2.8 2.0 99.4 B3. IV 1.147 .146 .006 .060 .027 .034 .043 .030 23 72.10 15. 80 2.71 n. d. 1.27 1.99 3.10 3.12 0. 50 100. 59 A4. IV 1.202 . 155 .017 (.034) .032 .036 .050 .033 24 76.15 13. 26 1.38 n. d. 0.48 1.22 2.18 4.17 0. 35 trace 99. 99 2. 516 A3. Ill 1.283 .130 .009 (.018) .012 .021 .035 .045 — 25 77.94 11. 78 1.21 n. d. 0.32 0. 74 1.56 4.17 1.91 99. 63 2.557 A3. Ill 1.299 .115 .007 (.014) .008 .012 .026 .044 17° 26 73. 64 15. 07 n. d. 1.63 0. 65 2. 63 3.06 2. 91 0. 54 0. 34 trace 100. 57 A3. Ill 1.226 .147 — .022 .016 .047 .049 .031 .002 — 27 70. 57 16. 13 3.52 n. d. 0.99 1. 79 2. 48 3. 74 0. 87 100. 09 A4. IV 1.176 .158 .022 (.044) .025 .032 .040 .039 28 73. 87 15. 00 1.30 n. d. 0.19 1.46 3. 02 4. 33 0. 66 99. 83 A3. Ill 1.231 .147 .008 (.016) .005 .027 .048 .046 29 72.13 13. 28 1.38 n. d. 0. 40 1.05 3.60 3. 58 4. 75 100.17 A3. Ill 1.202 .130 .009 (.018) .010 .019 . 058 .038 _ PERSALANE-TEHAMOSE. 135 ORDER 3. OUARFELIC. COLUMBARE—Continued. SUBRANG 3. SODIPOTASSIC. TEHAMOSE-Continued. Norm. Locality. Analyst. Reference. Author’s nan Q 40.1 or 20.6 ab 17.8 an 10.0 C 4.2 hy 3.9 rnt 2.5 Abruzzen, Riesen- gebirge, Silesia. W. Herz. L. Milch, N. J. B. B., XII, p. 163, 1899. Granitite. Q 34.8 or 21.1 ab 23.1 an 11.1 C 1.1 hy 5.6 int 1.9 Heidelberg. Ries- engebirge, Silesia. W. Herz. L. Milch, N. J. B. B., XII, p. 164, 1899. Granitite. Q 43.9 or 18.9 ab 21.5 an 7.8 C 1.6 hy 3.2 mt 1.6 Abruzzen, Riesenge- birge, Silesia. W. Herz. L. Milch, N. J. B. B., XII, p. 191, 1899. Granite. Q 37.9 or 25.6 ab 24.6 an 5.8 C 0.5 hy 2.2 mt 1.2 hml.O Abruzzen, Riesenge- birge, Silesia. W. Herz. L. Milch, N. J. B. B., XII, p. 191, 1899. Granite. Q 40.1 or 23.4 ab 21.5 an 5.8 C 3.1 hy 3. 3 mt 0.9 Hohesrad, Riesen- gebirge, Silesia. 1 W. Herz. L. Milch, N. J. B. B., XII, p. 190, 1899. Granite (graphic). Q 38.9 or 20. 6 ab 18.3 an 10.6 C 4.7 hy 4. 9 mt 1.6 Sauberg, Riesenge- birge, Silesia. W. Herz. L. Milch, N. J. B. B., XII, p. 167, 1899. Granitite. Q 40.0 or 28.4 ab 21.0 an 3.9 C 1.8 hy 0.7 mt 2.1 Kiiserngrat, Wind- giille Mountains, Switzerland. J. Mai. C. Schmidt, N. J. B. B., IV, p. 432, 1886. Porphyry. Q, 42.1 or 21.7 ab 13. 6 an 10.8 C 2.9 hy 3. 0 mt 3.3 Invorio Superiore, Lago d’Orta, Pied¬ mont. L. Ricciardi. L. Ricciardi, Att. Ac. Gioen. Catan. XVIII (21), 1885. Porphyry. Q 40.4 or 20.0 ab 12.6 an 8.9 C 10.7 hy 2.1 mt 0. 9 hm 3.0 Staindrop Rig, Chev¬ iot Hills, Scotland. I. Macadam. H. Kynaston, Tr. Edinb. G. Soc., VII, p. 394, 1899. Granite. Q 33.6 or 16. 7 ab 22.5 an 9.5 C 4.0 hy 9.9 mt 1.4 Arenig, Wales. J. H. Player. J. J. H. Teall, Br. Petr., p. 339, 1888. Ortho-felsite. Q 34.0 or 18.3 ab 26.2 an 10.0 C 3.7 hy 7.8 Querigut, Pyrenees, France. A. Pisani. A. Lacroix, B. S.C. G. Fr., XI, No. 71, p. 31,1900. Granite. Q 43.9 or 25.0 ab 18.3 an 5.8 C 3.0 hy 3.6 Bohnstadtberg, Hesse, Germany. F. W. Schmidt. C. Chelius, Erl. G. Kte. Hesse, I, Bl. Rossdorf, p. 54, 1886. Granite. Q 50.0 or 24.5 ab 13.6 an 3.3 C 3.3 hy 2.6 Buccione, Lago d’Orta, Piedmont. L. Ricciardi. L. Ricciardi, Att. Ac. Gioen. Catan. XVIII (16), 1885. “Porphyry.’ Q 36.8 or 17.2 ab 25.7 an 13.1 C 2.0 hy 4.5 Monte della Fossa, Vulcano, H£olian. Islands. L. Ricciardi. G. Mercalli, Gior. Min., Ill, p. 104, 1892. Rhyolite. Q 34.3 or 21.7 ab21.0 an 8. 9 C 4.8 hy 8.3 W. of Karpi, Orivesi, Finland. H. Berghell. J. J. Sederholm, B. C. G. Finl., No. 6, p. 151, 1897. Granite. Q 35.5 or 25.6 ab 25.2 an 7.5 C 2.7 hy 2.7 Sidi Zerzor, n. Mener- ville, Algeria. Duparc and Pearce. Duparc, Pearce, and Ritter, Mem. Soc. Phys., Genev., XX XIII, p. 115,1900. Liparite. Q 33.6 or 21.1 ab 30.4 an 5.3 C 1.5 hy 3.4 Cape Marsa, n. Me- nerville, Algeria. Duparc and Pearce. Duparc, Pearce, and Ritter, Mem. Soc. Phys. Genev., XXXIII, p. 77, 1900. Liparite. Remarks. Near riesenose. A1 2 0 3 high? I One decimal. Calc, to 100%? CHEMICAL ANALYSES OF IGNEOUS HOCKS it 36 CLASS I. PERSALANE—Continued. RANG 2. DOMALKALIC. ALSBACHASE. No. Si0 2 A1 2 0 3 FeX> 3 FeO MgO CaO Na 2 () k 2 o h 2 o+ h 2 o- O o hi Ti0 2 PA MnO BaO Sum Sp. gr. 1 78. 28 9. 96 1.85 1. 78 0. 95 1.68 2. 73 1.35 0. 83 0.12 0. 70 0.11 0. 08 0. 02 100.44 Al. I 1.305 .098 .012 .025 .024 .030 .043 .015 .009 .001 .001 2 76. 20 14. 41 n. d. 1.49 0. 65 2.19 3.32 2.44 100.70 2.65 A3. Ill 1.270 .141 — .021 .016 .039 .053 .025 3 76. 54 13. 82 1.62 n. d. 0. 01 0. 85 4. 32 2. 31 0. 20 99. 67 A3. Ill 1.276 .135 .010 (.020) — .015 .069 .024 4 69.54 17. 95 2.50 0. 22 0.50 1.80 4.30 1.21 1.96 none none none 100. 35 A2. II 1.159 .176 .015 .003 .013 .032 .069 .013 — * — 5 74. 84 14. 05 0.17 0. 31 trace 1. 57 3. 66 3.14 2. 33 100. 07 2. 38 A3. Ill 1.247 .138 .001 .004 — .029 .059 .033 ' 17° 6 79. 49 11.60 0.32 0. 49 0.09 1.64 4. 04 1.52 0. 68 none 99. 88 A3. Ill 1.325 .114 .002 .007 .002 .029 .065 .016 7 68.15 15.00 1.18 0. 60 0.87 1.91 3.13 0. 96 8. 70 100. 50 2. 497 A3. Ill 1.136 .147 .007 .008 .022 .034 .050 .010 8 76. 68 14.49 n. d. 1.09 0. 84 1.53 3. 92 1.20 0. 36 trace 100.11 A3. Ill 1.278 .142 — .015 .021 .027 .063 .013 — 9 75. 88 14. 75 trace trace 0.16 2. 08 3. 78 2. 60 0. 20 none 0.50 trace 0.04 99. 99 A2. II 1.265 .145 — — .004 .038 .061 .027 .006 — .001 10 72. 49 15. 82 1.18 0.15 0. 76 2. 02 4. 03 2. 26 0.35 0.14 0. 56 0.01 0.05 99.82 A2. II 1.208 .155 .007 .002 .019 .036 .064 .024 .007 — .001 11 74.13 12. 61 2. 87 0.86 0. 23 1.60 4. 55 2.13 0. 66 0.16 99.80 A3. Ill 1.236 .123 .018 .012 .006 .029 .074 .022 .002 12 72. 63 13.49 2.17 1.04 0. 89 1. 65 3. 86 2. 62 0. 31 0. 23 0. 07 0. 26 99. 26 B2. Ill 1.211 .132 .014 .014 .022 .030 .062 .027 .001 .002 13 77. 35 13.16 0. 73 0. 78 0. 99 1.09 2.67 2.35 1.40 100. 52 A3. Ill 1.289 .129 .004 .011 .025 .020 .043 .025 14 74. 65 12.64 2. 26 0. 85 1.01 2.12 3. 41 2. 37 1.14 100.45 A3. Ill 1.244 .124 .014 .012 .025 .038 .055 .025 15 72.89 15. 83 1.89 0.10 1.31 2.04 2. 81 2.29 1.21 100. 37 A3. Ill 1.215 . 155 .012 .001 .033 .037 .045 .024 10 76.41 13. 08 1.99 n. d. 0. 61 0. 82 4. 41 1.02 0. 70 0.40 99.40 B3. IV 1.274 .128 0.13 (.026) .015 .014 .071 .011 .005 17 73. 08 13.50 2. 60 0.13 0.15 1.07 3. 95 3.19 1.33 0. 62 trace trace 0. 06 99. 80 2.514 A2. II 1.218 .132 .016 .002 .004 .020 .064 .034 .008 — — — PERSALANE-ALSBACHOSE. 137 ORDER 3. QUARFELIC. COLUMBARE—Continued. SUBRANG 4. DOSODIC. ALSBACHOSE. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. SrO LinO trace trace Q 52.1 or 8.3 ab 22.5 an 8.3 C 1.0 hy 3.1 mt 2.8 il 1.2 Great Falls of the Po¬ tomac, Maryland. W. F. Hille- brand. G. H. Williams, 15 A. R. U. S. G. S. p. 670, 1895. Granite-gneiss. Q 41.2 or 13.9 ab 27.8 an 10. 8 C 2.5 hy 4.4 Bad Vermilion Lake, Rainy River region, Ontario. W. Lawson. A. P. Coleman, J.G., IV. p. 909, 1896. Granite. Q 40.1 or 13.3 ab 36.2 an 4.2 C 2.8 hy 2.7 Granite Heights, Wausau, Wisconsin. W. W. Daniells. E. R. Buckley, B. IV, G. Nh. S. Wise, p. 136, 1898. Granite. S0 3 LioO 0.37 trace Q 35.4 or 7.2 ab36.2 an 8.9 C 6.2 hy 1.3 mt 0.7 hm;2.0 Mount Holmes, Yel¬ lowstone National Park. J. E. Whitfield. J. P. Iddings, M.U. S. G. S., XXXII, p. 65, 1899. Dacite-por- phyry. A1 2 0 3 high? Q 38.0 or 18.3 ab 30.9 an 8.1 C 1.7 hy 0.4 mt 0.2 East Mountain, Elk Mountains, Colorado. L. G. Eakins. W. Cross, B. U.S.G.S., 148, p. 177, 1897. Rhyolite. Q 46.4 or 8.9 ab 34.1 an 8.1 C 0.4 hy 0.9 mt 0.5 Cinder Cone, California. W. F. Hille- brand. J. S. Diller, B. U.S.G.S.,-79, p. 29, 1891. Pumice. (Inclosure in basalt.) Dried at 105° Q 41.2 or 5.6 ,ab 26.2 an 9.5 C 5.5 hy 2.2 mt 1.8 Oaxaca, Mexico. A. Rohrig. Felix and Lenk, Btr. G. Mex., II, p. 129, 1899. Rhyolite. Much H 2 0. Q 43.9 or 7.2 ab 33.0 an 7.5 C 4.0 hy 4.1 Corinto, Nicaragua. J. Petersen. J. Petersen, N.J., 1898, II, p. 157. Obsidian. S trace Q 39.4 or 15.0 ab 32.0 an 10.6 C 1.9 hy 0.4 Average sample. Essequibo and Demerara rivers, British Guiana. J. B. Harrison. J. B. Harrison, Rep. G. Essequibo, etc., rivers, p. 44, 1900. Aplite. Dried at 110°. Alkalies corr. Priv. contrib. S none Q 35.3 or 13.3 ab 33.5 an 10.0 C 3.1 hy 1.9 mt 0.5 il 1.1 Average sample. Essequibo River, British Guiana. J. B. Harrison. J. B. Harrison, Rep. G. Essequibo, etc., rivers, p. 42, 1900. Granitite. Dried at 110°. Alkalies corr. Priv. contrib. Q 36.0 or 12.2 ab 38.8 an 7.5 hy 0. 6 mt 2.8 hml.O Melibocus, Odenwald, Hesse. F. Kutscher. C. Chelius, Notbl. Ver. Erdk. Darmst. (4), XIII, p. 8, 1892. Alsbachite. S0 3 0.34 Q 35.7 or 15.0 ab 32.5 an 8.3 C 1.3 hy 2.2 mt 3.2 Hermesbuckel, n. Aschaffenburg, Hesse. Not stated. G. Klemm, Erl. G. Kte. Hessen, III, Bl. Schaaf- heim, p. 19, 1894. Granite. S0 3 =S of F'eS... Sum low. Q 48.5 or 13.9 ab 22.5 an 5.6 C 4.2 hy 3.4 mt 0.9 Schneegrube, Riesengebirge, Silesia. W. Herz. L. Milch, N. J. B. B., XII, p. 189, 1899. Granite (graphic). Q 39.8 or 13.9 ab 28.8 an 10.6 C 0.6 hy 2.5 mt 3.1 Arnsdorf, Riesengebirge, Silesia. W. Herz. L. Milch, N. J. B. B., XII, p. 176, 1899. Granite. Q 41.6 or 13.3 ab 23.6 an 10.3 C 5.0 hy 3.3 mt 0.2 hm 1.8 Schneekoppe, Riesengebirge, Silesia. W. Herz. L. Milch, N. J. B. B., XII, p. 165, 1899. Granitite. Q 43.1 or 6.1 ab37. 2 an 3.9 C 3.3 hy 4.3 il 0.8 Mount Kastel, Crimea, Russia. R. Prendel. R. Prendel, Cf. N. J. 1887, II, p. 95. Liparite. S0 3 0.12 Q 35.2 or 18.9 ab33.5 an 5.6 C 1.4 hy 0. 4 mt 0.5 hm 2.2 Waihi, Hauraki, Auckland Province, New Zealand. P. Holland. P. Holland, Q. J. G. S., LV, p. 467, 1899. Rhyolite. Dried at 100°. 138 CHEMICAL ANALYSES OF IGNEOUS ROCKS. CLASS I. PERSALANE—Continued. KANG 2. DOM ALKALI!'. ALSBACHASE. No. Si0 2 A1A Fe 2 0 3 FeO MgO CaO Na 2 0 K,0 H 2 0- C0 2 Ti0 2 PA MnO BaO Sum Sp. gr. 1 74. 79 12. 59 1.19 n. d. 0. 31 3. 58 5.10 0.21 1.03 0. 09 0. 58 0.17 trace trace none 99. 64 A2. II 1.247 .123 .007 (.014) .008 .064 ' .082 .002 .002 — — — 2 72. 77 3.00 1.28 12. 65 0.67 2.47 4.95 0.34 1.16 0. 07 0.47 0. 22 0. 04 0. 08 trace 100.17 Al. I 1.213 .127 .008 .037 .017 .045 .080 .003 .003 — .001 3 77. 58 13. 96 0. 54 0. 45 0. 30 0. 83 4.97 0.90 0. 20 none 0. 40 trace none 100.13 A2. II 1.293 .137 .003 .006 .008 .014 .080 .010 .005 — — 4 75.00 14. 96 1.12 n. d. 1.41 0. 83 4. 83 0. 70 1.62 100. 47 2. 55 A3. Ill 1.250 .147 .007 (.014) .035 .014 .077 .008 KANG 3. ALKALICALCIC. RIESENASE. 1 66. 86 17.41 0.40 1.27 0.51 5. 37 1.21 3.69 0. 24 0.82 0. 97 0.51 0. 73 99. 99 2. 655 A2. II 1.114 .171 .003 .018 .013 .096 .019 .039 .012 .012 .010 2 72.11 16. 74 0. 89 1.28 1.04 2. 24 1.20 2. 88 1. 75 100.13 A3. Ill 1.202 .164 .006 .018 .026 .040 .019 .030 3 76. 59 11.43 0. 47 2.12 0. 64 2. 78 0.97 3. 76 1.39 100.15 2.565 A3. Ill 1.278 .112 .003 .030 .016 .050 .016 .040 20° 4 72.10 13. 98 2. 08 2.38 1.02 2. 41 1.07 3. 29 1.65 99. 98 2.551 A3. Ill 1.202 .137 .013 .033 .026 .043 .018 .035 18° 5 71.14 11.14 n. d. 2. 73 1.62 3.17 1.40 4. 13 1. 77 trace none trace trace 99. 83 A2. II 1.186 .110 — .038 .041 .057 .022 .043 — — — 6 70. 20 15. 48 0. 86 1.07 0.93 2. 36 1.24 4/38 1.80 trace trace trace 100. 49 2. 662 A2. II 1.170 .152 .005 .015 .023 .042 .020 .046 — — — 15° 7 76. 33 12. 84 2. 22 n. d. 0. 37 2.96 1.09 3.42 0. 83 100.06 2. 557 A4. IV 1.272 .126 .014 (. 028) .009 .052 .018 .036 17° 8 72. 95 16. 51 1.62 n. d. 0. 43 3. 27 1.04 3.12 0. 98 0. 23 100.15 2. 623 A3. Ill 1.216 .162 .010 (.020) .011 .059 .017 .033 .002 15° RANG 3. ALKALICALCIC. RIESENASE. 1 70. 74 14. 68 0. 69 0. 58 0. 28 4.12 2. 29 2. 59 2. 09 2.14 0. 06 0. 03 100.29 2. 680 A2. II 1.179 .144 .004 .008 .007 .073 .037 .027 .001 16° 2 65. 67 13. 48 1.51 n. d. 0.31 2. 41 1.52 2. 42 12. 27 trace trace 0.32 100.19 A3. Ill 1.095 .132 .009 (.018) .008 .043 .024 .025 — — 0.02 3 77. 27 9. 98 2.58 0.41 0. 51 2. 28 2.14 2.39 0. 86 trace trace trace 0.99 99. 41 2. 667 A3. Ill 1.288 .098 .016 .005 .013 .941 . 0:34 .024 — — .014 PERSALANE-KIESENOSE. 139 ORDER 3. QUARFELIC. COLUMBARE—Continued. SUBRANG 5. PERSODIC. YUKONOSE. Inclu sive. Norm. SrO none Q 37.1 di 5.5 LUO none or 1.1 ah 43.0 an 10.8 SrO trace Q 34.9 hv 5.1 LUO trace or 1.7 mt 1.9 ab 41.9 an 12.5 il 0.5 Q 42.8 hy 0.6 or 5.6 nit 0.7 ab 41. 9 an 3.9 il 0.8 C 3.4 Q 39.8 or 4.4 ab 40.3 an 3.9 C 4.9 hy 5.3 Locality. Fort Hamlin, Yukon River, Alaska. Greenville, Plumas County, California. Towakaima Falls, Barama River, British Guiana. Mount Kastel, Crimea, Russia. Analyst. H. N. Stokes. W. F. Hille- brand. Assistant of J. B. Harri¬ son. R. Prendel. Reference. J. E. Spun - , B. U. S. G. S., 168, •p. 229, 1900. H. W. Turner, B. U. S. G. S., 148, p. 201, 1897. Rep. G. N. W. Distr., II, 1898, p. 10. R. Prendel, N. J., 1887, II. Cf. p. 96. Author’s name. Remarks. Tonalite-aplite. Quartz- porphyry. Aplite. Liparite. Dried at 110°. Alkalies? Near westpha- lose. SUBRANG 2. DOPOTASSIC. S0 3 trace Q 35.0 or 21.7 ab 10.0 an 23.1 C 3.1 hy 1.7 mt 0.7 il 1.8 ap 1.3 Nieder Modau, Hesse. F. W. Schmidt. C. Chelius, Erl. G. K. Hesse, I, Bl. Rossdorf, p. 44, 1886. Granite- porphyry. Q 47.4 or 16.7 ab 10.0 an 11.1 C 7.7 hy 4.2 mt 1.4 Barndorfer Berg, Riesengebirge, Silesia. W. Herz. L. Milch, N. J. B. B., XII, p. 222, 1899. Schliere in granite. Q 47.9 or 22.2 ab 8.4 an 13.9 C 0.6 hv 5.0 mt 0.7 Between Bolzano and Ameno, Lago d’Orta, Piedmont. L. Ricciardi. L. Ricciardi, Atti. Ac. Gioen. Catan., XVIII, (18), 1885. Porphyry. Q 45.1 or 19.5 ab 9.4 an 12.0 C 4.2 hy 5.3 mt 3.0 Arona, Lago Mag- giore, Piedmont. L. Ricciardi. L. Ricciardi, Atti. Ac. Gioen. Catan., XVIII, .(8), 1885. Porphyry. X so 3 Cl Li.O 1.05 1.78 trace trace Q 36.9 or 23.9 ab 11.5 an 12.5 di 2.9 hy 7.7 Sassoforte, Rocca- strada, Tuscany. R. V. Mat- teucci. R. V. Matteucci, B. C. G. It, XXI, p. 285, 1890. Trachyte. X includes Si0 2 and Pt. S0 3 for S? S ZnO 0.03 2.14 Q 39.4 or 25.6 ab 10.5 anil. 7 C 4.5 hy 3.6 mt 1.2 Serpieri Mine, Laurium, Greece. R. Lepsius. R. Lepsius, G. von Attika, Berlin, 1893, p. 93. Granite. ZnO as silicate? Q 48.4 or 20.0 ab 9.4 an 14.5 C 2.0 hy 4.6 Between Bolzano and Ameno, Lago d’Orta, Piedmont. L. Ricciardi. L. Ricciardi, Atti. Ac. Gioen. Catan., XVIII, (17), 1885. Porphyry. Cf. No. 3 above. Q 46.0 or 18.3 ab 8.9 an 16.4 C 5.4 hy 3.7 Mte. Deruta, Umbria. L. Ricciardi. A. Verri, B. S. G. It., V, p. 54, 1886. Granite. * SUBRANG 3. SODIPOTASSIC. RIESENOSE. 1 Cl SrO trace trace Q 38.5 or 15.0 ab 19.4 an 20.3 C 0.7 hy 1.0 mt 0.9 Leadville, Colorado. W. F. Hille- brand. W. Cross, M. U. S. G. S., XII, p. 332, 1886. j so 3 0.28 Q 41.3 or 13.9 | ab 12.6 an 12.0 C 4.1 hy 3.2 Silver Cliff, Custer County, Colorado. L. G. Eakins. Cross and Eakins, A. J. S., XLIV, p. 101, 1892. Pitchstone. Much II.,O. IQ 50.6 or 13.9 abl7.8 an 10.8 C 0.3 hv 1.3 mt 1.2 hm 1.7 Wengen wiese, Heuweg, Hesse. F. W. Schmidt. C. Chelius, Erl. G. Kte. Hesse, I, Bl. Rossdorf, ' 23. 35, 1886. Granite. MnO high. 140 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS I. PERSALANE—Continued. RANG 3. ALKALICALCIC. RIESENASE—Continued. No. SiO, A1A FeA FeO MgO CaO Nad) K,0 h 2 o+ H 2 0- C0 2 Ti0 2 p 2 o 5 MnO BaO Sum Sp. gr. 76. 82 143. 68 1. 75 0.32 0.51 2. 83 1.55 2.10 0. 74 100. 30 A3. Ill 1.280 .134 .011 .004 .013 .050 .025 .022 5 75. 27 13.98 1.90 1.00 1.44 2.16 1.54 2.01 0. 91 100. 21 A3. Ill 1.255 .137 .012 .014 ; .036 .039 .025 .021 6 75.21 14.18 0. 75 1. 05 0. 44 2. 40 1.74 3.12 1.01 99. 90 A3. Ill 1.254 .139 .005 .015 .011 .043 .028 .033 7 72. 92 17. 77 0. 20 1.09 0.79 2.17 1.24 2. 65 1. 35 100.18 A3. Ill 1.215 .174 .001 . 015 .020 .039 .020 .028 8 72. 71 14. 59 1. 78 0.92 2.17 2.57 1.65 1.99 1.67 100. 05 A3. Ill 1.212 .143 .011 .012 .054 .047 .027 .021 9 69.04 16. 91 2. 22 1.36 1.86 3.16 1. 76 2. 44 1.01 99. 76 A3. Ill 1.151 .166 .014 .019 .047 .056 .028 .025 10 69. 40 15. 79 2.15 n. d. ' 2.36 4. 68 1.34 2. 76 1.44 99. 92 A4. IV 1.157 .155 .014 (. 028) . 059 .084 .021 .030 11 73. 00 14. 45 n. d. 3.12 0. 82 3. 30 1. 70 3.18 0. 70 trace trace trace trace 100.27 2. 76 A3. Ill 1.217 .142 — .043 | .021 .059 .027 .034 — — — 12 69. 36 16. 93 1.27 1.25 0.92 3.66 2.16 3. 20 1.10 none trace 99. 85 2. 680 A3. Ill 1.156 . 166 .008 .017 .023 .065 .035 .034 — — 15° RANG 3. ALKALICALCIC. RIESENASE. 1 73.69 12.89 1.02 2. 59 0. 50 3. 74 2.81 1.48 1.06 trace trace trace 99. 78 A3. Ill 1.228 .126 .006 .036 .013 .067 .045 ,016 — — — 2 73. 65 11.19 1.31 3. 25 0. 51 2. 78 3. 74 1.86 0.44 99. 23 B3. IV 1.228 .110 .008 .045 . 013 .050 .060 .020 3 71.50 17.44 0. 45 1.96 1.03 3.00 2. 45 1.53 0. 68 0. 42 0.10 trace none 100.56 A2. II 1.192 .171 .003 .028 ! .026 .053 .040 .016 .001 — — 4 72. 81 15. 22 1.88 1.40 1.10 2. 77 2.10 1.54 1.66 100. 48 A3. Ill 1.214 .149 .012 .019 .027 .050 .034 .016 5 76.13 12. 44 0. 74 n. d. 0. 83 3. 25 3. 34 1.50 1.52 99. 75 A3. Ill 1.269 .122 .005 (.010) .021 .058 .054 .016 6 69.10 16. 32 3. 70 1.37 : 1.12 5.10 2.91 1.06 n. d. 100.68 2. 456 A3. Ill 1.152 .160 .023 .019 .028 .091 .047 .012 PERSALANE-SR. 4 OF RIESENASE. 141 ORDER 3. QUARFELIC. COLUMBARE—Continued SUBRANG 3. SODIPOTASSIC. RIESENOSE—Continued. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. Q 53.1 or 12.2 ab 13.1 an 13.9 C 3.8 hy 1.3 mt 0.9 hm 1.1 Schliisselberg, n. Schmiedeberg, Riesengebirge, Silesia. W. Herz. L. Milch, N. J. B. B., XII, p. 180, 1899. Granite. Q 51.8 or 11.7 ab 13.1 an 10.8 C 5.2 hy 3.9 mt 2.8 Griinbusch, n. Hirschberg, Riesengebirge, Silesia. W. Herz. L. Milch, N. J. B. B., XII, p. 194, 1899. Granite. Q 46.9 or 18.3 ab 14.7 an 12.0 C 3.6 hy 2.4 mt 1.2 Bolzenschloss Berg, Riesengebirge, Silesia. W. Herz. L. Milch, N. J. B. B., XII, p. 186, 1899. Aplite. Q, 48.9 or 15.6 ab 10.5 an 10.8 C 8.9 hy 3.8 mt 0.2 Above Buche, Schmiedeberg, Riesengebirge, Silesia. W. Herz. L. Milch, N. J. B. B., XII, p. 168, 1899. Granitite. Q 46.6 or 11.7 ab 14.1 an 13.1 C 4.9 hy *6.4 mt 2.7 Griinbusch, n. Hirschberg, Riesengebirge, Silesia. W. Herz. L. Milch, N. J. B. B., XII, p. 169, 1899. Granitite. Q 40.1 or 13.9 ab 14. 7 an 15. 6 C 5.8 hy 5.7 nit 3.2 Griinbusch, n. Hirschberg, Riesengebirge, Silesia. W. Herz. L. Milch, N. J. B. B., XII, p. 210, 1899. Granodiorite. Q 35.8 or 16.7 ab 11.0 an 23.4 C 2.1 hy 9.6 Radworza, Rac.hergebirge, Styria. A. Pontoni. A. Pontoni, T. M. P. M., XIA 7 , p. 370, 1895. Granite- porphyry. B 2 0 3 trace S0 3 trace Cl trace Li 2 0 trace * Q 40.1 or 18. 9 ab 14.1 an 16.4 C 2.2 hy 7.7 Torniella, Roccastrada, Grosseto, Italy. R. A". Matteucci. R. A". Matteucci, B. S. G. It., X, p. 677, 1891. Nevadite. Q 34.8 or 18. 9 ab 18.3 an 18.1 C 3,3 hy 3.5 mt 1.9 Plaka, Laurion, Greece. R. Lepsius. R. Lepsius, G. v. Attika, Berlin. 1893, p. 89. Granite. SUBRANG 4. DOSODIC. SrO Li»0 trace trace Q 41.2 or 8.9 ab 23.6 an 18.1 di 0.4 hy 5.0 mt 1.4 Port Deposit, Balti¬ more, Maryland. W. Bromwell. G. P. Grimsley, J. Cinn. Soc. Nh., XVII, 1894. Granite. Cf. W. C. Dav, 18 A. R. U. S. G.S.,A 7 , p. 963, 1897. Q 37.1 or 11.1 ab 31.4 an 8.3 di 4.8 hy 3.7 mt 1.9 Berlin, Wisconsin. S. Weidman. S. Weidman, B. Ill, Wise. G. Nh. S., p. 2, 1898. Rhyolite-gneiss. Sum low. . s V trace Q 41.9 or 8.9 ab 21.0 an 14.7 C 6.3 hy 6.0 mt 0.7 Potaro, etc., rivers (average sample), British Guiana. Assistant of J. B. Harri¬ son. J. B. Harrison, Rep. G. Essequibo, etc., rivers, p. 52, 1900. Quartz-porphy- rite. Dried at 110°. Alkalies corr. Priv. contr., J. B. H. Q 46.8 or 8.9 ab 17.8 an 13.9 C 5.0 hy 3.6 mt 2.8 Koppenkegel Riesen¬ gebirge, Silesia. W. Herz. L. Milch, N. J. B. B., XII, p. 152, 1899. Granitite. Q 43.2 or 8.9 ab 28.3 an 13.9 di 1.8 hy 1.3 mt 0.7 Bolzenschloss, Riesengebirge, Silesia. AV. Herz. L. Milch, N. J. B. B., XII, p. 184, 1899. Aplite. Q 35.3 or 6.7 ab 24.6 an 25.3 C 1.0 hy 2.8 mt 4.4 hm 0.6 Izu-san, Japan. B. Koto. B. Koto, Q. J. G. S., XL, p. 445, 1884 Andesite. 142 CHEMICAL ANALYSES OF IGNEOUS HOCKS CLASS I. PERSALANE—Continued. RANG 3. ALKALICALCIC. RIESENASE. No. Si0 2 A1A Fe 2 C) s FeO MgO CaO Na.,0 k 2 o H..O+ ' H,0— CO, Ti0 2 PA MnO Bat) Sum Sp. gr. 1 72. 24 13. 84 1.45 1. 86 1.10 3. 40 4.43 0. 39 0. 69 0.17 0.41 0.10 0.12 0. 08 100. 28 Al. I 1.204 .136 .009 .026 .028 .060 .071 .004 .005 .001 .002 9 72. 54 16.19 1.16 1.17 0. 65 3. 25 4.47 0. 23 0. 05 • none 0. 20 0.12 trace 100. 03 A2. II 1.209 .159 .007 .017 .016 .058 .072 .002 .002 .001 — 3 66. 99 17. 56 1.41 3.39 0. 93 4. 25 3.35 0.34 1.53 trace trace 99. 75 A3. Ill 1.117 .172 .009 .048 .023 . 076 .054 .003 1 RANG 4. DOCALCIC. 1 77. 61 13. 34 2.07 n. d. 0. 52 3. 67 0.61 2.04 0. 55 100. 41 2. 556 A4. IV 1.294 .132 .013 (.026) .013 . 066 .009 .021 17° RANG 4. DOCALCIC. 1 68. 87 16. 42 * 1.91 2. 06 2.54 4.64 1.25 1. 10 1. 12 99.91 A3. Ill 1.148 .161 .012 .029 .064 .083 . 020 .012 CLASS I. PERSALANE’. RANG 1. PERALKALIC. LIPARASE. 1 70. 65 16. 16 1.53 0.52 trace 0. 55 0.54 8. 66 1.22 trace 99.83 2. 62 A3. Ill 1.178 .159 .009 .007 .010 .009 .092 — 2 68.13 15. 75 1.60 0. 74 0. 45 0.27 0. 61 10. 54 1.90 0. 31 trace 100. 37 2.573 A2. II 1.136 .154 .010 .010 .011 .005 .010 .112 .004 — 3 69. 06 14.41 1.89 0. 54 0. 39 trace 0. 24 12. 33 0. 96 0.09 0. 24 0. 08 100. 51 2. 553 A2. II 1.151 .141 .012 .007 .010 .004 .131 .003 .001 RANG 1. PERALKALIC. LIPARASE. 1 75. 20 12. 96 0. 37 0. 27 0.12 0. 29 2. 02 8.38 0.58 trace 0. 03 100.22 A3. Ill 1.253 .127 .003 .004 .003 .005 .032 .089 — — 2 73.90 13.65 0. 28 0.42 0.14 0. 23 2.53 7.99 0. 33 0. 16 0. 07 0. 05 trace trace 99. 75 Al. I 1.232 .134 .002 .005 .004 .004 . .040 .085 .001 — — — 3 71.12 13.35 1.37 1.28 0. 47 0. 32 2. 02 9. 82 1.13 100. 88 A3. Ill 1.185 .131 .009 .018 .012 .005 .032 .104 4 75. 44 12.33 0.49 1.00 0. 52 trace 2.38 7.13 1.26 0. 07 0.11 101. 73 C2. IV 1.257 .121 .003 .014 . C13 — .039 .075 .001 .002 5 75. 47 11.21 0. 44 n. d. 0. 30 0. 80 2.98 7. 98 0. 85 none 0. 11 100.14 A3. Ill 1.258 .110 .003 (.006) .008 .014 .048 .085 _ .002 PERSALANE—OMEOSE. 143 ORDER 3. QUARFELIC. COLUMBARE—Continued. SUBRANG 5. PERSODIC. VULCANOSE. Inclusive. Norm. Locality. SrO trace Q 35.6 By 4.6 Near Milton, or 2.2 nit 2.1 ftb 37.2 il 0.8 nil 16.7 Calaveras County, California. Q 37.4 hy 2.9 Towakaima Falls, qr 1.1 mt 1.6 ab 37.7 ail 16.1 C 2.8 Barama River, British Guiana. Q 33.7 hy 7.4 or 1.7 mt 2.1 ab 2s. 3 an 21.1 C 4.0 Projectile of 1888, Vulcano, ASolian Islands. Analyst. Hillebrand. Assistant of J.B. Harrison. L. Kahlenberg. Reference. Author’s name. Remarks. H. W. Turner, 14 A. R. U. S. G. S., II, p. 484, 1894. J. B. Harrison, Rep. G. N.W. Distr., II, p. 10, 1898. W. IT. Hobbs, B. G. S. A., V, p. 601, 1894. Z. D. G. G., XLV, p. 591, 1893. Quartz-porphy- rite. Granite-gneiss. Dried at 110°. Alkalies? Vulcanite. SUBRANG 1. PREPOTASSIC. Q 56.6 hy 4.6 Buccione, L. Ricciardi. L. Ricciardi, Porphyry. or 11.7 Lago d’Orta, Att. Ac. Gioen. an 18. 3 Piedmont. Catan., XVIII, C 3.7 p. 17, 1885. SUBRANG 2. SODIPOTASSIC. Q 42.5 or 6.7 ab 10.5 an 23.1 C 4.7 hy 8.6 lilt 2.8 V orderberg, Riesengebirge, Silesia. W. Herz. L. Milch, N. J. B. B., XII, p. 214, 1899. Schliere in granite. ORDER 4. QUARDOFELIC. BRITANNARE. SUBRANG 1. PERPOTASSIC. LEBACHOSE. Q, 33.1 .or 51.2 ab 4.7 an 2.8 C 5.0 mt 2.1 Chywoon Morvah, Cornwall. J. A. Phillips. J. J. II.. Teall, Br. Petr., p. 314, 1898. Granite. S0 3 0.07 Q 23.0 or 62.3 ab 5.2 an 1.4 C 8 hy 1.1 nit 1.4 il 0.6 hm 0.6 Himmelberg, Bl. Lebach, Prussia. K. Boettcher. Weiss and Grebe, Erl. G. Kte. Preuss, Bl. Lebach, p. 30, 1889. Quartz-por¬ phyry. S0 3 for S. S0 3 0.28 Q 19.9 or 72.J3 ab 2.1 C 0.6 hy 1.0 mt 1.6 hm0.8 Mutterbach, Masserthal, Thiiringerwald. Hampe. H. Loretz, Jb. Pr. G.L.-A. (1888), p. 295, 1889. Quartz-ortho- clasite. S0 3 for S. SUBRANG 2. DOPOTASSIC. OMEOSE. Q. 30.2 hy 0.4 Round Mountain, L. G. Eakins. W. Cross, Rhyolite. or 49.5 mt 0.7 Rosita Hills, Pr. Col. Sc. Soc., II, an l! 4 . Colorado. p. 33, 1887. F none Q 28.0 hy 0.8 Currant Creek Can- VV. F. Hille- E. B. Mathews, Granite. SrO none LUO trace or 47.3 nit 0.5 ' ab 21. 0 yon, Pike’s Peak, brand. B. U. S. G. S., 148, an 1.1 Colorado. p. 160, 1897. C 0.5 Q 20.9 ac 2.3 Torre de la Testa, A. Osann. A. Osann, Liparite. or 57. 8 di 1.2 ab 14.1 hy 2.5 Cabo de Gata, Z. D. G. G XLIII, mt 0.9 Spain. p. 695, 1891. # Zr0 2 0.34 Q, 32.9 hy 2.7 N. of Drammen, I\ Jannasch. W. C. Brdgger, Quartz-por- FeSa 0.66 or 41.7 mt 0.7 ab 20.4 Norway. Z. K., XVI, phyry. C 0.7 p. 77, 1890. Q 32.8 ns 2.9 Ivolsjon, Smaland, H. Santesson. O. Nordenskjold, Rhyolite (Hal- or 47.3 di 3.3 ab 13 1 Sweden. B. G. Inst. Un. Upsala, leflinta). - I, p. 216, 1894. Also in 17 A. R. U.S.G. S.,1I, p. 324, 1896. Sum high. Alkalies high? 144 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS I. PERSALANE—Continued. RANG 1. PERALKALIC. LIPARASE—Continued. No. Si0 2 A1A Fe 2 0 3 FeO MgO CaO Na 2 0 k 2 o h 2 o+ h 2 o- co 2 Ti0 2 PA MnO BaO Sum Sp. gr. 6 71.62 12. 83 0.13 .010 ' n. d. 1.48 3. 81 9. 69 0. 02 99. 68 A3. Ill 1.194 .126 .001 .001 — .027 .060 .103 i 7 74. 66 11.49 2.02 n. d. 0.10 0. 44 1.69 8. 68 0. 74 0. 07 0. 08 99. 97 2. 598 A3. Ill 1.241 .113 .013 (.014) .003 .008 .027 .021 .001 .001 20.5° 8 63. 25 16. 53 3. 10 0. 26 0. 53 0. 26 1.19 11.00 2. 71 none 0.52 0. 27 99. 74 2.559 A2. II 1.054 .162 .020 .004 .013 .004 .018 .117 .007 .002 9 70.91 15. 32 trace none 0. 07 0. 58 2.31 10. 07 0. 51 99. 77 2. 564 A3. Ill 1.182 .150 — — .002 .010 .037 .107 10 68. 87 16. 62 0. 43 2. 72 1.60 0. 71 1.80 6.48 0. 74 0.05 100. 02 2. 762 A3. Ill 1.148 .163 .003 .038 .040 .012 .029 .069 - RANG 1. PERALKALIC. LIPARASE. 1 75. 98 12. 34 0. 85 0.93 0.15 0.13 4. 02 4. 44 0.64 0. 24 none 0.17 0. 03 trace 0. 07 100. 02 Al. I 1.266 .121 .005 .012 .004 .002 .064 .047 .002 — — — 2 72. 77 12.15 0. 44 3.06 0. 22 0. 07 3. 38 4. 67 0. 55 0.17 2. 06 0. 20 trace 0. 16 0. 03 100. 09 Al. I 1.213 .119 .003 .0413 .006 .001 .055 .050 .003 — .002 — 3 73. 69 12. 46 1.21 1.75 0.17 0.36 4.47 4. 92 0. 24 0.14 trace 0. 28 0. 04 0. 15 none 100. 09 Al. I 1.228 .122 .007 .024 .004 .007 .072 .052 — .004 — .002 — 4 73. 03 13. 43 0. 40 1.49 0.14 0. 79 4.91 4. 54 0.35 0.18 trace 0. 30 0. 06 0.15 ti’ace 100.03 Al. I 1.217 .132 .003 .020 .004 .014 .079 .048 .004 — .002 — 5 71.90 14.12 1. 20 0. 86 0. 33 1.13 4. 52 4. 81 0. 42 0.18 0. 21 0. 35 0.11 0. 05 0. 04 100. 35 Al. I 1.198 .138 .008 .012 .008 .020 .072 .051 .004 .001 .001 — 6 77.61 11.94 0. 55 0. 87 trace 0. 31 3. 80 4. 98 0. 23 trace 0. 25 trace 100. 54 2. 618 A2. II 1.294 .117 .004 .012 — .006 .061 0.53 .003 — 18° 7 76. 49 11. 89 1.16 1. 56 trace 0.14 4. 03 5. 00 0. 38 0.12 trace trace 100. 77 2.650 A3. Ill 1.275 .117 .007 .022 _ .002 .064 .053 — 13° 8 67. 35 15.05 1.23 4. 76 0. 03 0. 55 4. 42 6.08 0.17 0.16 0. 60 0. 05 100. 45 2. 69 A2. II 1.123 .148 .008 .066 .001 .010 • .071 .065 008 .001 17° 9 77.49 11.89 0. 34 1.12 0.09 0. 45 4.58 4. 26 0.16 trace 100. 63 A3. Ill 1.292 .116 .002 .015 .002 .008 .074 .045 _ 10 76. 44 12. 95 0. 19 0. 89 trace 0.15 4. 76 4. 95 0.09 — 0. 37 trace 100. 79 B2. Ill 1.274 .127 .001 .012 — .003 .077 .053 .005 — 11 73. 93 12.29 2.91 1.55 0. 04 0. 31 4. 66 4. 63 0. 41 0. 18 trace none 100. 91 2. 642 B2. Ill 1.232 .120 .018 .022 .001 .006 .075 .049 .002 — 22° 12 71.40 14. 76 1.68 0. 72 0. 55 0.10 4. 79 5.16 1.46 trace 100. 62 A3. Ill 1.190 .145 .011 .010 .014 .002 .077 .055 — PERSALANE-LIPAROSE. 145 ORDER 4. QUARDOFELIC. BRITANNARE—Continued. SUBRANG 2. DOPOTASSIC. OMEOSE—Continued. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. Q 22.2 or 57.3 ab 12.1 ns 4. 5 ac 0.5 di 0.3 wo 3.0 Sodero, Wand, Fin¬ land. H. Berghell. H. Berghell, Finl. G. Und., Bl. 23, p. 18, 1892. Microcline- granite. Alkalies high? Q 31.0 or 51.2 ab 11.0 ac 2.7 di 1.9 hy 1.2 Gross-U mstadt, Hesse. Not stated. C. A T ogel, Abh. G. L.-A. Harms., II, p. 49, 1891. Quartz-por¬ phyry. S0 3 0.12 Q 13.4 or 65.1 ab 9.4 an 1.1 C 2.3 hv 1.3 il 0.6 hm 3.1 Heckmannsloch, Blatt Wahlen, Prussia. Gremse. H. Grebe, Erl. G. Kte. Preuss. Bl. Wahlen, p. 29, 1889. Quartz-por¬ phyry. Fe 2 0 3 and K 2 0 high? Q 18.0 or 59.5 ab 19.4 an 1.7 di 0.7 Wilson’s Creek, Omeo, Victoria. A. W. Howitt. A. W. Howitt, T. R.Soe.Vict.,XXIA T , p. 120, 1888. Graphic granite. Dried at 100°. Q 27.7 or 38.4 ab 15.2 an 3.2 C 5.4 hy 8.6 mt 0. 7 Wilson’s Creek, Omeo, Victoria. A. W. Howitt. A. W. Howitt, T.R.Soc.A r ict.,XXIV, p. 122, 1888. Granite. Dried at 100°. SUBRANG 3. SODIPOTASSIC LIPAROSE. Zr0 3 s NiO SrO LioO 0.03 none none none trace Q 35.1 or 26 1 ab 33.5 an 0.6 C 0.8 hy 1.4 nit 1.2 Haystack Mountain, Aroostook County, Maine. W. F. Hille- brand. H. E. Gregory, B. U. S. G. S., 165, p. 155, 1900. Rhyolite. ZrO., FeSo Cr.,0 3 SrO LioO 0.04 0.12 none none trace Q 32.1 or 27.8 ab 28.8 an 0.3 C 1.3 hy 5.9 mt 0.7 Quoggy Joe Moun¬ tain, Aroostook County, Maine. W. F. Hille- brand. H. E. Gregory, B. U. S. G. S., 165, p. 166, 1900. Bostonite. ZrOo Cl F FeSo 0.14 0.02 0.05 none q 26.8 or 28.9 ab 37. 7 ac 0.9 di 1.6 hy 2.2 mt 1.2 i 0.6 Mount Ascutney, Vermont. W. F. Hille- brand. R. A. Dalv, B. U. 8.' G. S., 148, p. 69, 1897. Granite-por¬ phyry. Zr0 2 Cl F FeS.. 0.06 0.03 0.08 0.09 Q 24.9 or 26.7 ab 41.4 an 1.4 di 2.2 hy 1.6 mt 0.7 Mount Ascutney, Vermont. W. F. Hille- brand. R. A. Daly, B. U. S. G. S., 148, p. 68, 1897. Syenite-por¬ phyry. ZrOo Cl ' F FeSo NiO' 0.04 0.02 0.06 trace none Q 24.5 or 28.4 ab 37.7 an 4.2 di 1.1 hy 0.3 mt 1.9 il 0.6 Mount Ascutney, Vermont. W. F. Hille- brand. R. A. Daly, B. U. S. G. S., 148, p. 68, 1897. Granitite. Q 35.4 or 29.5 ab 32.0 an 0.8 di 0.8 hy 0.2 mt 0.9 il 0.5 Rockport, Cape Ann, Massachusetts. H. S. AVashing- ton. IJ. S. AVashington, J. G., VI, p. 793, 1898. Hornblende- granite. Q 33.4 or 29.5 ab 33.5 di 0.4 hy 1.8 mt 1.6 Magnolia, Essex County, Massachu¬ setts. H. S. Washing- ton. H. S. AVashington, J. G., VII, , p. 113, 1899. Paisanite. Q 14.2 or 36.1 ab 37.2 an 2.8 hy 6.6 mt 1.9 il 1.2 Pigeon Hill Quarry, Rockport, Cape Ann, Massachusetts. H. S. AA T ashing- ton. H. S. AA’ashington, J. G„ VI, p. 795, 1898. Quartz-syenite. Inclosure in granite, No. 6, above. Q 33.4 or 25.0 ab 37. 7 ac 0.9 di 2.0 hy 1.2 Bass Rocks, Cape Ann, Massachusetts. H. S. Washing- ton. H. S. Washington, J. G.,AHI,p. 107,1899. Aplite. Dried at 110°. Border of dike. Q 28.6 or 29.5 ab 39.8 ac 0.5 di 0.8 hy 0.5 il 0.8 Bass Rocks, Cape Ann, Massachusetts. H. S. AVashing- ton. H. S. AA^ashington, J. G., VII, p. 107, 1899. Aplite. Dried at 110°. Center of dike. Q 28.9 or 27.2 ab37.2 ac 1.8 di 1 5 hy 0. 4 mt 3.2 Hardwicke Quarry, Quincy, Massachu¬ setts. Ii. S. AVashing- ton. H. S. Washington, A. J. S., VI, p. 181, 1898. Granite. Dried at 110°. Sum high. Q 22.8 or 30.6 ab 40.3 an 0.6 C 1.1 hy 1.4 mt 2.4 Marblehead Neck, Essex County, Mas¬ sachusetts. H. S. AVashing- ton. H. S. Washington, J. G., VII, p. 293, 1899. Keratophyre (bostonite). Dried at 110° 14128—No. 14—03-10 146 CHEMICAL ANALYSES OF IGNEOUS ROCKS. CLASS I. PERSALANE—Continued. RANG 1. PERALKALIC. LIPARASE—Continued. No. SiO, A1A Fe 2 0 3 FeO MgO CaO Na 2 0 k 2 o i H 2 0+ H 2 0- C0 2 Ti0 2 PA MnO 1 BaO Sum Sp. gr. 13 1 70. 23 15. 00 1.99 n. d. 0. 38 0. 33 4. 98 4.99 1.28 0. 91 0. 03 0. 06 0.24 100.42 A3. Ill 1.171 .147 .012 (.024) .010 .006 .080 .053 — — .003 14 72. 06 14.83 1.28 j 0.64 0.13 1.20 4. 31 5.64 0. 65 trace 100.86 2. 640 A3. Ill 1.201 . 145 .008 .009 .004 .021 .069 .060 • — 15 68. 96 15.25 3. 28 none 0. 20 0. 76 5.45 5.01 0. 91 0. 23 100. 05 A3. Ill 1.149 .150 .021 — .005 ► .014 .088 .054 i .003 16 74. 87 14. 27 trace 0.51 0. 16 0. 48 3. 06 5.36 0. 66 0. 26 0. 05 0.21 trace 99. 89 A2. II 1.248 .140 — .007 .004 .009 .049 .058 .001 .002 — 17 72.17 14.44 1.02 0. 99 0. 70 0. 69 3. 65 4. 84 n.d. n. d. 0. 27 98. 77 A2. II 1.203 .142 .006 .014 .018 .012 .059 .051 .003 18 73.70 12. 87 3. 76 0.31 0.11 0.14 3. 63 4.56 0.57 trace 0. 07 99.84 A3. Ill 1.228 .126 .024 .004 .003 .002 .058 .049 — .001 19 72. 42 13.04 0. 68 2.49 0. 58 0. 66 3.44 4.97 1.21 0. 40 0. 20 0. 09 0.15 100. 37 2. 620 Al. I 1.207 .128 .004 . 035 .015 .011 .055 . 054 .005 .001 .001 20 68. 36 13. 76 2. 65 2. 75 0. 68 0. 70 3. 56 4.48 0. 98 1.57 0. 33 trace 100.48 Al. I 1.139 .135 .017 .039 .017 .012 .057 .048 .020 .002 — 21 72. 35 13. 78 1.87 0. 36 0. 42 0. 87 4.44 4. 49 0. 54 0. 22 0. 44 0.13 0. 06 99. 87 A2. II 1.206 .135 .012 .005 .011 .016 .071 .048 .006 .001 .001 22 71.88 12. 88 3. 05 1.05 0. 33 1.13 4. 21 4. 46 0. 26 0.17 0.22 0.15 trace 99.81 A2. 11 1.198 .126 .019 .015 .008 .020 .068 .048 .003 .001 — 23 71.33 12.55 3.75 0. 85 0.58 0. 94 4. 52 4. 20 0. 30 0.12 0. 55 0.16 0. 04 100. 04 A2. II 1.189 .123 .024 .012 .015 .017 .072 .045 .007 .001 — 24 68. 71 13.45 5.31 0. 75 0.19 0. 96 4. 63 5.51 0. 36 0.13 0. 21 0. 04 0.14 none 100.44 Al. I 1.145 .132 .033 .010 .005 .017 .075 .059 .003 — .002 25 73. 35 14. 38 1.96 0.34 0. 09 0. 26 4.33 5. 66 n. d. n. d. 100. 37 A3. Ill 1.223 .141 .012 .005 j .002 .005 .070 .060 26 68.34 15.32 1.90 0. 84 0. 54 0.92 5. 45 5. 62 0.30 0.15 0. 21 0.13 0.07 0. 08 99. 95 Al. I 1.139 .149 .012 .012 .014 .016 .089 .060 .003 .001 .001 27 68. 65 18.31 0. 56 0. 08 0.12 1.00 4. 86 4. 74 0. 83 : 0.27 0. 20 trace trace 0.13 99. 88 Al. I 1.144 .180 .003 .001 .003 .018 .078 .050 .003 — — .001 28 74.90 ! 13.64 0. 66 0.50 trace 0.61 4. 22 4. 64 0. 33 0.15 trace 99. 65 2. 61 A2. II 1.248 .134 .004 .007 — .011 .068 .049 .002 — 29 74. 82 13. 80 0. 37 0.30 0.10 1 0.17 4. 33 4. 81 0. 83 0. 25 trace 99. 78 2. 59 A2. II 1.244 .135 .002 .004 .003 .003 .070 .051 .003 — PERSALANE-LIPAROSE. 147 ORDER 4. QUARDOFELIC. BRITANNARE—Continued. SUBRANG 3. SODIPOTASSIC. LIPAROSE—Continued. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. Q 19.6 or 29.5 ab 41.9 an 1.7 C 0.8 hy 4.1 Marblehead Neck, Essex County, Mas¬ sachusetts. T. M. Chatard. J. H. Sears, B. M. C. Z., XYI, p. 170, 1890. , Keratophyre (bostonite). s. 0.12 Q 23.1 or 33.3 ab 36.2 an 4.4 di 1.1 nit 1.9 Brooklyn Quarry, Stony Creek, Con¬ necticut. II. T. VultA J. F. Kemp, B. G. S. A., X, p. 375, 1899. Granite. Q 16.2 or 30.0 ab 46.1 an 2.2 di 1.3 hm 3.3 Beekmantown, Clin¬ ton County, New York. E. W. Morley. 11. P. Cushing, B. G. S. A., IX, p. 248, 1898. Syenite-por¬ phyry. Li 2 0 trace Q 34.6 or 32.2 ab 25.7 an 2.5 C 2.4 by 1.4 Brookville, Mont¬ gomery County, Maryland. W. F. Hille- brand. G. H. Williams, 15 A. R. U. S. G. S., p. 672, 1895. Granite. Q 29.6 or 28.4 ab 30.9 an 3.3 C 2.0 hy 2.9 nit 1.4 Felch Mountain, Michigan. H. N. Stokes. H. L. Smith, M.U.S.G.S., XXXVI, p. 389, 1899. Granite. H 2 0 not deter¬ mined. Q 34.7 or 27.2 ab 30.4 an 0.6 C 1.7 hy 0.3 mt 0.9 hm 3.2 Little Brick Island, Pigeon Point, Min¬ nesota. L. G. Eakins. AY. S. Bayley, B. U. S. G. S., 109, p. 58, 1893. Quartz-kerato¬ phyre. Dried at 105°. Cl LioO trace trace Q, 29.4 or 30.0 ab 28.8 an 3.2 C 0.8 hy 5.0 mt 0.9 il 0.8 Pigeon Point, Minne¬ sota. W. F. Hille- brand. W. S. Bayley, A. J. S., XXXVII, p. 59, 1889. Soda-granite. Dried at 105°. Seven speci¬ mens. so 3 Li»0 0.66 none Q 28.0 or 26.7 ab 29.9 an 3.3 C 1.8 hy 1.9 mt 3.9 il 3.1 Pigeon !Point, Minne¬ sota. J. E. Whitfield. W. S. Bayley, B. U. S. G. S., 109, p. 90, 1893. Granite. Dried at 105°. “Altered.” NiO 0.20 Q 26.9 or 26.7 ab 37.2 an 4.4 hy 1.1 il 0.8 hm 1.9 Six miles east of Iron- ton, Missouri. W.H. Melville. E. Haworth, A. R. Mo. G. S., VIII, p. 181, 1895. Granite. NiO 0.02 Q 27.7 or 26.7 ab 35.6 an 2.8 di 2.2 mt 2.8 il 0.5 hm 1.1 Six miles east of Iron- ton, Missouri. W. H. Melville. E. Haworth, A. R. Mo. G. S., VIII, p. 181, 1895. Quartz-por¬ phyry. NiO 0.15 Q 26.6 or 25.0 ab37.7 an 3.1 di 1.2 hy 0.9 mt 1.2 il 1.1 hm3.0 Six miles east of Iron- ton, Missouri. W. H. Melville. E. Haworth, A. R. Mo. G. S.,VIII, p. 181, 1895. Quartz-por¬ phyry. so 3 SrO LioO 0.06 none none Q 18.7 or 32.8 ab 38.3 ac 0.9 di 4.0 mt 2.4 il 0.5 Yieja Mountains, San Carlos, Presidio County, Texas. G. Steiger. E. C. E. Lord, B. U. S. G. S., 164, p. 92, 1900. Quartz-pan tel- lerite. Q 25.9 or 33.4 ab 36.7 an 1.4 C 0.6 hy 0.2 mt 1.2 hm 1.1 Mosquez Canyon, Apache Mountains, Transpecos, Texas. A. Osann. A. Osann, T. M. P. M., XV, p. 439, 1895. Paisanite. Cl F SrO Li.,0 0.04 none 0.04 none Q 12.9 or 33.4 ab 46.6 di 2.4 mt 2.1 il 0.5 hm 0.5 Beaver Creek Stock, Bearpaw Moun¬ tains, Montana. H. N. Stokes. Weed and Pirsson, A. J. S., I, p. 354,1896. Quartz-syenite. so 3 Cl F SrO LioO trace 0.03 trace 0.10 trace <4 20.2 or 27.8 ab 40.9 an 5.0 C 3.5 hy 0.3 mt 0. 2 hm 0.4 Antoine Butte, Little Rocky Mountains, Montana. 11. N. Stokes. Weed and Pirsson, J. G., IV, p. 414,1896. Quartz-syenite- porphyry. Near toscanose. Q 31.3 or 27.2 ab 35.6 an 3.1 C 0.6 hy 0.4 mt 0.9 Fourmile Creek, Cas¬ tle Mountains, Montana. L. Y. Pirsson. Weed and Pirsson, B. U. S. G. S., 139, p. 120, 1896. Rhyolite. LioO trace Q 30.6 or 28.4 ab 36.7 an 0.8 C 1.1 hy 0.3 mt 0.5 il 0.5 Fourmile Creek, Cas¬ tle Mountains, Montana. L. V. Pirsson. Weed and Pirsson, B. U. S. G. S., 139, p. 101, 1896. Quartz-tou rma- line-por- phyry. 148 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS I. PERSALANE—Continued. RANG 1. PERALKALIC. LIPARASE—Continued. No. Si0 2 A1 2 O s Fe 2 0 3 FeO MgO CaO Na 2 0 k 2 o h 2 o+ h 2 o- co 2 Ti0 2 f 2 o 5 MnO BaO Sum Sp. gr. 30 72. 88 12.90 0. 74 1.05 0. 75 0.81 3. 72 5. 03 1.22 0. 45 0. 05 99. CO 2.64 A2. II 1.215 .126 .005 .015 .019 .014 .060 .054 .006 .001 31 72.48 13.14 1. 66 1.02 0.15 1.04 4. 22 4.88 0. 42 0. 32 trace 99. 33 2.62 A2. II 1.208 .129 .010 .014 .004 .019 .068 .052 .004 — 32 72. 38 14. 71 1.09 0. 82 0. 70 0.67 4. 28 4.15 0. 92 0.10 trace 99. 82 2.61 A2. II 1.206 .144 .007 .011 .018 .012 .069 .044 .001 33 71.67 15. 82 1.18 0. 35 0.13 0. 25 4. 46 4. 45 1.21 0.10 trace 99.62 2.60- A2. II 1.195 . 155 .007 .005 .003 .004 .072 .047 .001 — 34 75. 30 11.95 2.17 n. d. 0. 05 0. 62 3.09 4. 96 0. 61 0. 36 none 0.17 trace trace trace 100.17 A2. II 1.255 .117 .014 (.028) .001 .011 .050 .054 .002 — — — 35 75. 71 11.11 1.56 0. 37 0. 08 0. 88 4. 64 4.18 0. 35 1.25 0.07 100. 20 A2. II 1.262 .109 .010 .005 .002 .016 .075 .045 .016 .001 36 74. 70 13. 72 1.01 0. 62 0.14 0. 78 3. 90 4.02 0. 62 none none trace 99.91 2. 345 A2. II 1.245 .134 .006 .008 .004 .014 .063 .042 — — 37 70. 92 13. 24 3. 54 0. 66 0. 23 1.42 4. 28 4. 25 0.57 0.16 0.18 0.14 100. 59 A2. II 1.199 .130 .022 .010 .006 .025 .069 .046 .002 .001 .002 38 74. 45 14. 72 none 0. 56 0. 37 0. 83 3. 97 4. 53 0. 66 0. 01 0. 28 100. 38 A2. II 1.241 .144 — .008 .009 .014 .064 .048 — .004 39 69.89 17.94 0. 39 0. 52 0.14 trace 4.21 4. 38 2. 07 trace 0. 23 99. 77 2. 602 A3. Ill 1.165 .176 .002 .007 .004 _ .068 .047 — .003 29° 40 71.56 13.10 0. 66 0. 28 0.14 0. 74 3. 77 4. 06 5.52 0.16 99. 99 A3. Ill 1.193 .128 .004 .004 .004 .012 .061 .043 .002 41 67.13 18.41 0. 45 0. 07 0. 44 0. 55 4.17 5. 28 2. 98 0. 30 trace trace 99. 78 A2. II 1.119 .180 .003 .001 .011 .010 .068 .057 .004 — — 42 75.17 12. 66 0. 23 1.40 0. 05 0. 82 2. 88 5. 75 0. 66 0.16 0.10 0. 03 trace 0.03 100. 26 Al. I 1.253 .124 .001 .019 .001 .014 .047 .062 .001 — — 43 73.51 13. 28 0.94 0. 97 0. 05 1.11 3. 79 5. 22 0. 62 0.16 0.18 trace trace trace 100. 38 Al. I 1.225 .130 .006 .014 .001 .020 .061 .056 . 002 — — — 44 70.17 11.83 0. 93 none 0.06 0. 76 3. 85 3. 74 8. 72 0.17 100.23 2.25 A2. II 1.170 .116 .006 — .002 .013 .062 .040 .002 23.5° 45 76. 20 13.17 0.34 0. 73 0.19 0. 42 4.31 4. 46 0. 33 0.10 100. 25 A3. Ill 1.270 .129 .002 .010 .005 .007 .069 .048 .001 46 76.30 12.50 1.47 n.d. none 0.17 3. 86 4. 67 0.32 0.18 none 0. 05 trace trace 6. 07 99. 59 A2. II 1.272 .122 .009 (.018) — .003 .062 .050 .001 _ ___ PERSALANE—-LIPAROSE. 149 ORDER 4. QUARDOFELIC. BRITANNARE—Continued. SUBRANG 3. SODIPOTASSIC. LIPAROSE—Continued. Inclusive. • Norm. Locality. Analyst. Reference. Author’s name. Remarks. Q 2S.6 or 30.0 ab31.4 an 3.3 di 0.4 hy 3.0 xnt 1.2 Between Blackhawk and Robinson, Cas¬ tle Mountains, Montana. L. V. Pirsson. Weed and Pirsson, B. U. S. G. S., 139, p. 96, 1896. Aplitic granite. Q 27.4 or 28.9 ab 35.6 an 2.5 di 0.8 hy 0.8 mt 2.9 Elk Peak, Castle Mountains, Mon¬ tana. L. V. Pirsson. Weed and Pirsson, B. U. S. G. S., 139, p. 84, 1896. Granite. Sum low. Li 2 0 trace Q 28.9 or 24. 5 ab 36.2 an 3.3 C 1.9 hy 2.3 mt 1. 6 Ridge between Four- mile and Checker¬ board Creeks, Cas¬ tle Mountains, Montana. L. Y. Pirsson. Weed and Pirsson, B. U. S. G. S., 139, p. 99, 1896. Quartz-por¬ phyry. LioO trace Q. 28.2 or 26.1 ab37. 7 an 1.1 C 3.3 hy 0.3 mt 1.5 Musselshell River, Castle Mountains, Montana. L. Y. Pirsson. Weed and Pirsson, B. U. S. G. S., 139, p. 103, 1896. * Quartz-por¬ phyry. so 3 Cl SrO LioO Ofg 0.44 trace none trace 0.45 Q 35.0 or 30. 0 ab 26.2 an 3.1 C 0.2 hy 3.5 il 0.3 Red Mountain, Rimi¬ ni, Butte District, Montana. PI. N. Stokes. W. H. Weed, B. U. S. G. S., 168, p. 119, 1900. Rhyolite. Q 32.6 or 25.0 ab 34.1 ac 4.6 di 0.4 wo 1.6 il 0.8 ru 0.9 Great Paint Pots, Yellowstone National Park. F. A. Gooch. Hague and Iddings, B. U. S. G. S., 148, p. 131, 1897. Rhyolite. Ti0 2 high? FeS 2 0.40 Q 34.9 or 23.4 ab 33.0 an 3.9 C 1.5 hy 0.8 mt 1.4 pr 0.4 Obsidian Cliff, Yellowstone National Park. J. E. Whitfield. J. P. Iddings, 7 A. R. U. S. G. S., p. 282, 1888. Obsidian (black). • Q 27.8 or 25.6 ab 36.2 an 4.2 di 1.3 wo 0.5 mt 2.3 hm 1.9 Upper Geyser Basin, Yellowstone National Park. F. A. Gooch. J. P. Iddings, M. U. S. G. S., XXXII, p. 426, 1899. Rhyolite. Li,0 trace Q 31.4 or 26.7 ab 33.5 an 3.9 C 1.8 hy 2.0 Chalk Mountain, Colorado. W. F. Hille- brand. W. Cross, M. U. S. G. S., XII, p. 349, 1886. Nevadite. Li 2 0 trace Q 28.0 or 26.1 ab 35.6 C 6.2 hy 1.1 mt 0.5 Arkansas River, Nathrop, Colorado. L. G. Eakins. W. Cross, Pr. Colo. Sc. Soc., II, p. 69, 1887. Rhyolite. Q 32.5 or 23. 9 ab 32.0 an 3.3 C 1.2 hy 0.3 mt 1.0 Fleetwood Tunnel, Silver Cliff, Colo¬ rado. • L. G. Eakins. W. Cross, 17 A. R. U. S. G. S., II, p. 320, 1896. Pitchstone. Q 20.3 or 31.7 ab 35.6 an 2.8 C 4.6 hy 1.1 il 0.2 hm 0.5 Knickerbocker Hill, Silver Cliff, Colo¬ rado. L. G. Eakins. W. Cross, 17 A. R. TJ. S. G. S., II, p. 321, 1896. Andesite. “Decomposed.” F SrO LioO 0.31 trace? trace Q 33.0 or 34.5 ab 24.6 an 4.2 hy 2.5 mt 0.2 South side Pike’s Peak, Colorado. W. F. Hille- brand. E. B. Mathews, B. U. S. G. S., 148, p. 160, 1897. Granitite. F SrO Li 2 0 0.55 none trace Q 28.9 or 31.1 ab 32.0 an 3.6 di 1.9 mt 1.4 Middle Beaver Creek, Pike’s Peak, Colorado. W. F. Hille- brand. E. B. Mathews, B. U. S. G. S., 148, p. 160, 1897. Granitite. Q 31.8 or 22.2 ab 32.5 an 3.6 hy 0.2 hm 0.9 Near Marysvale, Utah. W. F. PIilie- brand. W. Cross, B. U. S. G. S., 168, p. 168, 1900. Rhyolitic glass. Much H 2 0. Q 32.5 or 26. 7 ab 36.2 an 1.9 C 0.5 hy 1.6 mt 0.5 Obsidian Hill, Tewan Mountains, New Mexico. L. G. Eakins. J. P. Iddings, 7 A. R. U. S. G. S., p. 291, 1888. Obsidian. SrO LioO none none Q 34.6 or 27.8 ab 32.5 an 0.8 hy 2.4 Chilkoot Pass, Alaska. H. N. Stokes. J. E. Spurr, A. G., XXV, p. 231, 1900. Alaskite. 150 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS I. PERSALANE—Continued. RANG 1. PERALKALIC. LIPARASE—Continued. No. Si0 2 A1A Fe 2 0 3 FeO MgO CaO Na 2 Q K 2 0 h 2 0+ O HH HM co 2 TiG 2 PA MnO BaO Sum Sp. gr. 47 75. 78 12. 39 0. 22 1. 25 0. 31 0.81 4. 00 4.64 0.41 99.81 A3. Ill 1.263 .121 .010 .018 .008 .014 .064 .050 48 74. 05 13.85 trace none 0,07 0. 90 4. 60 4. 31 2. 20 99. 98 A3. Ill 1.234 .136 — — .002 .016 .074 .046 49 74. 01 12. 95 n. d. 1.42 0. 48 1.00 5. 34 4.65 0. 29 0. 24 0.01 trace 100. 46 A3. Ill 1.234 .127 (.008) (. 003) .012 .018 .085 .050 .003 — 50 75. 23 12. 36 0. 96 1.24 0. 01 1.00 4. 00 4. 62 0. 73 0. 27 100. 42 A3. Ill 1.254 .121 .006 .017 — .018 .064 .049 .002 51 72.15 13.50 3.12 n.d. 0.16 0. 93 4. 20 4. 54 0. 85 0.45 99. 90 A3. Ill 1.203 .132 .020 (.040) .004 .016 .068 .048 .006 52 74.40 13.91 1.39 n. d. 0. 28 0. 61 4. 65 4. 36 0. 65 100. 25 A3. Ill 1.240 .136 .009 (.018) .007 .011 .075 .047 53 76. 05 11.68 0.34 1.05 0.29 0. 42 3. 79 5. 09 1.36 0. 05 trace 100. 54 2. 636 A2. II 1.268 .114 .002 .015 .007 .008 .060 .054 .001 — 54 71.49 15. 33 2.15 n. d. none 0. 30 4. 32 5. 86 0.54 0. 45 trace 100. 44 A3. Ill 1.-192 .150 .014 (.028) — .005 .070 .062 .006 — 55 69. 00 13. 95 1.56 2. 38 0.14 0. 49 5. 67 5.11 0. 70 0. 35 0.55 99. 95 • A2. II 1.150 .137 .010 .033 ' .004 .009 .091 .054 .004 .008 56 68. 95 14. 00 2.12 3.56 0. 07 0. 23 5.45 5.29 0. 05 0. 35 0. 55 100. 62 A2. II 1.149 .137 .013 .049 .002 .004 .088 .056 .004 .008 57 66. 40 17. 37 4. 30 0. 50 0. 20 0. 75 3. 88 4. 39 0. 50 1.00 0.11 99. 40 B2. Ill 1.107 .170 .027 . .Q07 .005 .014 .063 .047 .012 .001 58 76. 64 13. 50 0. 50 n. d. 0.12 0. 65 3. 48 5.51 n. d. 100. 40 A3. Ill 1.244 .132 .003 (.006) 003 .011 .056 .059 59 72. 78 12. 79 2.57 1. 73 0. 27 0. 64 3.17 5.16 0. 55 0.50 0.18 100. 34 A2. II 1.213 .125 .016 .024 .007 .012 .051 .056 .006 .003 60 72. 22 14. 80 0. 96 0. 80 0. 33 0. 74 4.16 5.16 0. 71 0.57 0.13 100. 58 A2. II 1.204 .145 .006 .011 .008 .013 .067 .056 .007 .002 61 71.25 13. 90 1.28 1.24 0. 45 0.97 3. 29 6. 28 0. 83 0. 32 trace 99.81 A2. II 1.188 .136 .008 .017 .011 .018 .053 .067 .004 — 62 69. 73 13. 02 2. 28 1.92 0.21 1.16 3.08 5. 78 1.94 0. 38 0. 29 trace 99. 79 A2. II 1.162 .127 .014 .027 .005 .021 .050 .062 .004 — 63 71.51 12. 82 2. 09 1.40 0.17 1.09 4. 24 4. 52 1.23 0. 10 trace 99.17 B2. Ill 1.192 .125 .013 .019 .004 .020 .068 .048 .001 — 64 76.03 11.76 1.99 n. d. 0. 27 0. 45 3. 36 5. 61 0. 63 100.10 A3. Ill 1.267 .115 .013 (.026). .007 .008 .054 .060 PERSALANE-LIPAROSE. 151 ORDER 4. QUARDOFELIC. BRITANNA RE—Continued. SUBRANG 3. SODIPOTASSIC. LIPAROSE—Continued. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. Q 32.5 or 27.8 ab 33.5 an 1.9 di 1.6 hv 1.1 mt 2.3 Mono Lake, Cali¬ fornia. W. H. Melville. W. Lindgren, B. U. S. G. S., 150, p. 151, 1898. Rhyolite- obsidian. Q 28.8 or 25.6 ab 38.8 an 4.4 hy 0.2 Mono Craters, Cali¬ fornia. T. M. Chatard. I. C. Russell, 8 A. R. U. S. G.S., p. 380, 1888. Rhyolite. Scoriaceous. Cl 0.07 Q 24.6 or 27.8 ab 40.3 ac 3. i di 3.3 il 0.5 Clear Lake, Cali¬ fornia. W. H. Melville. G. F. Becker, M. U. S. G. S.,XIII, p. 154, 1888. Andesite- obsidian. Q 32.3 or 27.2 ab33. 5 an 2.2 di 2.7 mt 1.4 Cerro de los Navajos, n. Tulacingo, Mexico. F. Baerwald. C. A. Tenne, Z. D. G.G., XXXVII, p. 616, 1885. Obsidian. Cf. No. 11, kallerudose. Q 26.2 or 26.7 ab35.6 an 4.4 hy 5.0 il 0.9 Mafalidh, Sniiffels Penins., Iceland. H. Biickstrom. H. Biickstrom, G. F. F., XIII, p. 651, 1891. Granophyre. Q 27.8 or 26.1 ab 39.3 an 2.8 U 0.4 hy 3.1 Pelvoux, France. P. Termier? P. Termier, C. R., CXXIV, p. 318, 1897. Granite. Zr0 2 0.42 F trace Li 2 0 trace Q 33.4 or 30.0 ab31.4 di 2.0 hy 1.5 mt 0.5 Drammen, Norway. - P. Jannasch. H. O. Lang, Nyt Mag., XXX, p. 40, 1886. Quartz- porphyry. Zr0 2 high? Q 22.1 or 34.5 ab 36.7 an 1.4 C 1.3 hy 3.2 il 0.9 Gislerud, Norway. R. Mauzelius. W. C. Brogger, Z. K., XVI, p. 46, 1890. Quartz- porphyry. Q 15.4 or 30.0 ab43.5 ac 3.7 di 2.2 hy 2.9 mt 0.5 il 0.6 Fron, Christiania, Norway. V. Schmelck. W. C. Brogger, Eg. Kg., I, p. 139, 1894. Quartz- lindoite. Center of dike. Near kalleru¬ dose. Q 15.0 or 31.1 ab 42.4 ac 3.2 di 0.9 hy 5.6 mt 1.4 il 0.6 Fron, Christiania, Norway. V. Schmelck. W. C. Brogger, Eg. Kg., I, p. 139, 1894. Arfvedsonite- grorudite. Border of dike. Q 25.1 or 26.1 ab 33.0 an 2.5 C 4.7 hy 0.5 tn 1.0 il 1.1 hm4.3 Fjelebua, Norway. G. Siirnstrom. W. C. Brogger, Z. K., XYI, p. 46, 1890. Quartz-syenite- porphyry. A1 2 0 3 , Fe 2 0 3 , and Ti0 2 high? Q 31.4 or 32.8 ab 29.3 an 3.1 C 0.6 hy 1.0 Arild, Kullen, Sweden. A. Hennig. A. Hennig, Act. Univ. Lund, XXXIV, 1898. Granitite. Q 32.4 or 31.1 ab 26.7 an 3.1 C 0.8 hy 1.0 mt 3.7 il 0.9 Storholm, n. Rodo, Sweden. H. Santesson. P. J. Holmquist, Afh. Sver. G. Und., No. 181, p. 38,1899. Felsite- porphyry. Q 25.9 or 31.1 ab 35.1 an 3.6 C 0.9 hy 0.8 mt 0.9 il 1.1 Storholm, n. Rddo, Sweden. H. Santesson. P. J. Holmquist, Afh. Sver. G. Und., No. 181, p. 51, 1899. Quartz- porphyry. Q 25.1 or 37.3 ab 27.8 an 4.4 di 0.4 hy 1.4 mt 2.5 Rodo, Sweden. N. Sahlbom. P. J. Holmquist, Afh. Sver. G. Und., No. 181, p. 25,1899. Rapakiwi gran¬ ite-porphyry. Dried at 100°. Q 26.3 or 34.5 ab 26.2 an 4.2 di 1.5 hy 1.0 mt 3.2 il 0.6 Gorgvik, Sweden. N. Sahlbom. P. J. Holmquist, Afh. Sver. G. Und., No. 181, p. 34,1899. Felsite- porphyry. Q 27.5 or 26.7 ab 35.6 an 2.5 di 2.5 mt 3.0 Siiterstugen, Brefven, Sweden. K. Winge. K. Winge, G. F. F., XVIII, p.195,1896. Granite. Sum low. Q 32.5 or 33.4 ab 28.3 an 0. 3 di 1.7 hy 3.3 Thai, Thiiringerwald, Baden. Not stated. K. Futterer, M. Bad. G. L-A., II, p.58,1893. Quartz- porphyry. 152 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS I. PERSALANE—Continued. RANG 1. PERALKALIC. LIPARASE—Continued. No. Si0 2 A1A FeA FeO MgO CaO Na 2 0 k 2 o h 2 o+ h 2 o- C0 2 Ti0 2 PA MnO BaO Sum Sp. gr. 65 70. 85 15. 79 1.20 1.27 trace 0. 26 3.37 6. 69 0.89 trace 0. 22 trace 100. 60 2. 599 A2. II 1.181 .155 .007 .018 .005 . 055 .071 .003 ■ — 66 66. 28 16.64 1.18 1.68 0.84 0. 52 3.91 6. 43 1.45 0.17 0. 61 0.17 100. 01 2.588 A2. II 1.105 .163 .007 .024 .021 .009 .063 .068 .008 .001 67 68. 60 16. 76 0. 93 0. 52 0. 79 0.86 4. 49 6. 46 0. 78 100.19 2. 602 A3. Ill 1.143 .164 .006 .007 .020 .015 .072 .069 68 75. 97 10. 84 n. d. 2. 03 0.16 1.01 4.23 4. 91 0.49 99.64 A3. Ill 1.266 .106 (.014) .028 .004 .018 .068 .052 69 73. 77 14. 13 0. 80 0. 75 0.27 0.35 2. 75 5.99 1.29 0.10 0.18 100. 46 2.622 A2. II 1.230 .138 .005 .010 .007 .006 .044 .064 .001 .001 70 74.97 12. 58 0. 26 1.41 0.10 0. 93 2. 75 5. 74 0. 52 0. 26 trace 99.52 2. 605 A2. II 1.250 .123 .002 .019 .003 .016 .044 .061 .003 — 71 74. 03 13.87 0. 09 0. 95 0.15 0. 30 3.71 6.14 1.17 trace 0.27 100. 68 2. 662 A2. II 1.234 .136 .001 .013 .004 .005 .059 .065 — .002 72 72. 68 16. 10 2.19 n.d. 0.21 0. 58 3.39 4. 46 0. 52 . 100.13 A4. IV 1.211 .158 .014 (.028) .005 .010 . 055 .048 73 67.04 16.00 2.11 1.55 0. 69 1.00 4. 65 5.49 1.53 none 0.92 100. 95 A2. II 1.117 .157 .013 . 022 .017 .018 .075 .059 .011 74 74. 76 11.60 3.50 0.19 0.18 0. 07 4. 35 4. 92 0. 64 trace trace 100. 21 A3. Ill 1.246 .114 .022 .003 .005 .001 .070 .052 75 74.37 12. 65 2. 58 n. d. 0. 20 1.22 3. 87 4. 57 0. 22 0.02 99. 70 A4. IV 1.240 .124 .016 (.032) .005 .021 .063 .049 ' 76 75. 06 11. 70 1.04 1. 57 0.19 1.01 2. 56 6.-25 0. 63 0. 36 100. 37 A3. Ill 1.251 .115 .006 .022 .005 .018 .041 . 067 .004 77 74.57 12. 58 2. 77 n. d. 0. 30 0. 35 3.98 3. 70 1.04 99. 29 B4. V 1.243 .123 .017 (.034) .008 .006 .064 .040 78 76. 82 12. 46 1.06 n. d. 0. 05 1.35 2. 85 5. 71 0. 24 100. 54 A3. Ill 1.280 .122 .007 (.014) .001 .024 .046 .061 79 76.01 11.96 2. 06 n. d. trace 0. 26 4. 46 4. 73 0. 28 trace 99. 76 2. 58 A3. Ill 1.267 .117 .013 (.016) — .004 .072 .050 — 80 75. 74 12. 45 1.02 n. d. 0. 08 1.00 2.91 6. 77 0. 33 100.30 A3. Ill 1.262 .122 .006 (.012) .002 .018 .047 .072 81 74.12 12. 39 0.31 0.21 0. 42 0. 30 3. 22 5.07 2.17 9 22 trace trace 100. 33 A3. Ill 1.235 .121 .002 .003 .011 .005 .052 .055 — — PERS A LANE—LIPAROSE. 153 ORDER 4. QUARDOFELIC. BRITANNARE—Continued. SUBRANG 3. SODIPOTASSIC. LIPAROSE—Continued. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. S0 3 0. oc Q 24.4 or 39.5 ab 28.8 an 1.4 C 2.4 hy 1.1 rat 1. 6 il 0.5 Tanngrund, Schleuse Thai, Thiiringer- vvald, Baden. Schade. H. Loretz, Jb. Pr. G. L-A., IX, p.295, 1889. Quartz- porphyry. S() ; , for S. S0 3 0.13 Q 16.3 or 37.8 ab 33.0 an 2.5 C 2.3 hy 3.3 mt 2. 9 Schleuse River, Thiiringerwald, Baden. G. F. Steffen. H. Loretz, Jb. Pr. G. L-A., IX, p.290,1889. Granite- porphyry. SO s for S. Q 15.2 or 37.8 ab 37.7 an 4.2 C 0.8 hy 2.0 mt 1.5 Gierniger Loch, Baden. M. Dittrich. F. Schalck, Sp. Kte., Baden, Bl. Petersthal, p. 33,1895. Granite. Center of dike; cf. No. 2, SR 2 of dacase. Q 28.1 or 28.9 ab 35.6 ac 5.5 di 0.9 wo 1.6 New Dreibrunnen, Odenwald, Hesse. F. Kutscher. C. Chelius, Not. bl. Ver. Erdk., XIII, p.8, 1892. Aplite. S0 3 0.08 Q 33.5 or 35.6 ab 23.1 an 1.7 C 2.4 hy 1.4 mt 1.2 Magdeburg, Prussia. Fischer. F. Klockmann, Jb. Pr. G. L-A., XI, p. 186, 1892. Quartz-por¬ phyry brec¬ cia. S0 3 for S. S0 3 trace Q 34.1 or 33.9 ab 23.1 an 4.4 C 0.2 hy 2.5 mt 0.5 il 0.5 Meineckenberg, Harz Mountains. Hampe. K. A. Lossen, Z. D. G. G., XL, p. 20-1, 1888. Granite-por¬ phyry. S0 3 for S. F trace Li 2 0 trace Cu trace Q 27.8 or 36.1 ab 30.9 an 1.4 C 0.7 hy 2.1 mt 0.2 Kleiner Ivornberg, Erzgebirge. A. Bottger. F. Sandberger, Sb. Munch. Ak, XVIII, p. 466, 1888. Lithionite- granite. Q 32.4 or 26.7 ab 28.8 an 2.8 C 4.6 hy 4.2 Veitsberg, Karlsbad, Bohemia. A. Schwager.? Schwager and V. Gum- bel, Geogn. Jhft., VII, p. 69, 1895. Granite. Q 15.6 or 32.8 ab 39.3 an 5.0 C 0.5 hy 1.7 mt 2.8 il 1.5 Kaserngrat, Wind- giille Mountains, Switzerland. C. Schmidt. C. Schmidt, N. J. B. B., Ill, p. 432, 1886. Porphyry. Q 31.6 or 28.9 ab 32.0 ac 4.2 hy 0.5 mt 0. 7 hml.6 Comende, San Pietro Island, Sardinia. M. Dittrich. H. Rosenbusch, Elemente, p. 257,1898. Comendite. » Q, 29.9 or 27.2 ab 33. 0 an 3.3 di 2.2 hy 3.6 Forgia Vecchia, Lipari, Aeolian Islands. F. Glaser. A. Bergeat, Abh. Munch. Ak., XX, p. Ill, 1899. Obsidian. Q 33.7 or 37.3 ab21.5 an 1.9 di 2.5 hy 1.3 mt 1.4 il 0.6 Hogland Island, Fin¬ land. V. Ungern- Sternberg. V. Ungern-Sternberg, In. Diss. Leipzig, 1882. Rapakiwi-gran- ite. Cf. W. Ramsay, G. F. F., XII, p. 481, 1890. Q 33.8 or 22.2 ab 33.5 an 1.7 C 1.3 hy 5.3 N. of Kamary, Crimea, Russia. A. Lagorio. A. Lagorio, T. M. P. M., VIII, p. 448, 1887. Dacite. Q 35.0 or 33.9 ab 24.1 an 4.2 di 2.3 hy 0.9 Cap Marsa. N. Mener- ville, Algeria. Not stated. Duparc, Pearce, and Rit¬ ter, Mem. Soc. Phvs. Gen., XXXIII, p. 77, 1900. Lipari te. Q 31.5 or 27.8 ab 35.1 ac 2.3 di 1.0 hy 1.6 Mount Scholoda, Abyssinia. G. T. Prior. G. T. Prior, Min. Mag., XII, p. 264, 1900. Paisanite. Q 30.8 or 40.0 ab 24.6 an 0.8 di 3.6 Ensay, Omeo, Vic¬ toria. A. W. Howitt. A. W. Howitt, T. R. Soc. Viet., XXII, p. 97, 1886. Aplite. Dried at 100°. S0 3 trace Q 34.3 or 30.6 ab 27.2 an 1.4 C 0.9 hy 1.2 mt 0.5 Wantialable Creek, County Gowen, New South Wales. J. C. H. Min- gaye. G. W. Card, Rec.G.S. N. S.W..IV, p. 116, 1895. Trachyte. 154 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS I. PERSALANE—Continued. RANG 1. PERALKALIC. LIPARASE. No. Si0 2 A1A Fe 2 0 3 FeO MgO CaO Na.,0 K 2 0 h 2 o+ O cs hrt O o TiO, p 2 o 5 MnO BaO Sum Sp. gr. 1 76. 34 11.60 2.41 0. 30 0. 06 0. 55 5.50 2. 75 0. 39 0. 10 trace 0. 26 trace trace 0. 09 100. 35 Al.I 1.272 .114 .015 .004 .002 .010 .089 .029 .003 — — .001 2 72. 56 12. 33 0. 80 0. 82 trace trace 5. 36 3. 08 4.59 0. 20 trace 99. 74 A2.II 1.209 .121 .005 .012 — — .087 .032 .003 — 3 75.92 12. 96 0. 33 1.40 trace 0.15 4. 60 4.15 0. 32 0.16 0.03 0. 05 trace 0. 04 trace 100. 23 Al.I 1.265 .127 .002 ’ .019 — .003 .074 .044 .001 — — 4 66. 90 14. 86 0. 93 3.41 0. 31 1.23 5. 56 5.02 0.31 0.16 0. 43 0.12 0.15 0.14 100. 59 0. 42 Al.I 1.115 .146 .006 • .048 .008 .021 .090 .053 .005 .001 .002 .001 100.17 5 68.40 17.99 2.66 1.63 0.49 0. 67 4.54 3. 54 0. 52 0. 21 100.65 A3. Ill 1.140 .175 .017 .022 .012 .012 .073 .037 .003 6 75.64 12.68 1.07 n. d. trace 0. 83 4. 98 3.51 1.58 100. 29 A3. Ill 1.261 .124 .007 (.014) — .014 .080 .037 7 67.23 14. 70 2. 85 1.15 1.39 2. 91 6.89 1.70 0. 79 trace 0. 08 trace .012 none 99. 89 Al.I 1.121 .144 .018 .017 .035 .051 .111 .018 .001 — .002 8 72. 70 13. 79 1.01 n. d. 0. 65 2. 07 4. 93 4. 33 1.10 \ 100.48 A3. Ill 1.212 .135 .006 (.012) .016 .038 .079 .046 9 73. 81 13. 72 1.59 n. d. 0. 23 0. 61 5.29 4. 09 —— 0.97 100. 31 A3. Ill 1.230 .135 .010 (.014) .006 .011 .085 .043 .012 10 71.14 12. 98 3. 35 n. d. 0. 34 1.10 4.97 3.84 0. 82 0. 48 99. 02 B4. V 1.186 .127 .021 (.042) .009 .020 .080 .040 .006 11 69.81 13.85 3.21 n. d. 0. 43 1.38 5.56 4. 40 n. d. 1.06 99. 70 A4. IV 1.164 .135 (.002) (. 036) .011 .025 .090 .047 .013 12 67. 91 15.17 3. 92 n. d. 0. 55 1.59 5. 36 4. 52 n. d. 0. 53 99. 55 • A4. IV 1.132 .148 .019 (.038) .014 .029 .087 .048 .007 13 71.60 13.60 2.40 n. d. 0. 21 2. 30 5.55 3.53 0. 70 99.89 A4. IV 1.193 .133 .015 (.030) .005 .041 .089 .037 i 1 14 71.65 13. 04 2. 79 1.80 trace trace 6. 30 3.98 1.10 trace trace 100. 66 A3. Ill 1.194 .128 .018 .025 — — .102 .042 _ 15 71.35 12. 21 4.53 1.14 trace 0. 22 6.51 3. 22 0. 33 0. 50 0. 78 100. 79 A2. II 1.189 .120 .028 .014 — .004 .105 .034 .006 .011 16 73.63 12. 89 n. d. 2. 46 0.57 1.37 5.28 3. 67 0.81 • 100. 68 A4. IV 1.227 .126 — .034 .014 .025 .085 .039 17 72.11 15. 85 1.63 n. d. 0. 69 0. 83 4. 85 4.23 0.68 100.87 2. 624 B3. IV 1.202 .155 .010 (.020) .017 .014 .078 .045 18 73. 46 12. 47 3. 64 n. d. trace 0. 32 5. 63 4. 03 0.44 trace 99.99 2. 58 A3. Ill 1.224 .122 (.010) (.024) .005 .090 .042 _ PERSALANE-KALLERUDOSE. 155 ORDER 4. QUARDOFELIC. BRITANNARE—Continued. SUBRANG 4. DOSODIC. KALLERUDOSE. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. SrO Li.,0 none none Q 33.6 or 16.1 ab 44.5 ac 1.8 di 0.4 wo 1.0 mt 0.2 il 0.5 hm2.2 Monterey, Franklin County, Pennsylvania. II. N. Stokes. F. Bascom, B. U.S.G.S., 150, p. 348, 1898. Aporhyolite. Q 29.5 or 17.8 ab 45.6 C 0.2 hy 0.5 mt 1.2 il 0.5 Checkerboard Creek, Castle Mountains, Montana. L. V. Pirsson. Weed and Pirsson, B. U. S. G. S., 139, p. 125, 1896. Rhyolite. F SrO LioO 0.12 none trace Q 32.0 or 24.5 ab 38.8 an 0.8 C 0.6 hy 2.2 mt 0.2 Near Florissant, Pike’s Peak District, Colorado. W. F. Hille- brand. E. B. Mathews, B. U. S. G. S., 148, p. 160, 1897. Granitite. F SrO LioO 1.00 none 0.06 Q 12.5 or 29.0 ab 47.2 an 0.6 hy 5.7 mt 1.4 il 0.8 ft 1.8 N. of Twin Creek, Pike’s Peak, Colo¬ rado. W. F. Hille- brand. E. B. Mathews, B. U. S. G. S., 148, p. 160, 1897. Granite-gneiss. Near liparose. Q, 26.3 or 20.6 ab 38.3 an 3.3 C 5.4 hy 1.9 nit 3.9 San Mateo Mountain, Mount Taylor Re¬ gion, New Mexico. T. M. Chatard. B. U. S. G. S., 148, p. 185, 1897. Lava. Q 31.4 or 20.6 ab41.9 an 1.9 di 1.7 hy 0.9 Cerro de los Navajos, n. Tulancingo, Mexico. F. Baerwald. C. A. Tenne, Z. D. G.G., XXXVII, p. 616, 1885. Obsidian. Cf. No. 50, lipa¬ rose. ZrOo Cl FeSo CoO' Cu none 0.02 0.02 none 0.04 Q 14.8 or 10.0 ab 58.2 an 4.2 di 7.6 mt 4.0 Mazaruni District, British Guiana. J. B. Harrison. J. B. Harrison, Priv. Contr. Pyroxene-gran- itite. Near noyangose. Q 22.0 or 25.6 ab 41.4 an 2.8 di 7.7 Cerro del Quinche, Quito, Ecuador. A. Lagorio. A. Lagorio, T. M. P. M., VIII, p. 444, 1887. Obsidian. Q 24.8 or 23.9 ab 44.5 ac 4.6 hy 0.8 il 1.9 Raudhfossafjoll, Ice¬ land. H. Backstrdm. H. Backstrdm, G. F. F., XIII, p. 657, 1891. Liparite. Q 23.6 or 22.2 ab 41.9 an 1.9 di 3.2 hy 4.0 il 0.9 Raudhfossafjoll, Ice¬ land. H. Backstrom. H. Backstrdm, G. F. F., XIII, p. 658, 1891. Obsidian. Sum low. Q 17.2 or 26.1 ab 46.1 ac 0.9 di 5.9 hy 1.1 il 2.0 Domadalshraun, Ice¬ land. H. Backstrdm. H. Backstrdm, G. F. F., XIII, p. 643, 1891. Liparite. Q 14.1 or 26.7 ab 45.6 an 3.6 di 3.8 hy 3.5 il 1.1 Langahraun, Iceland. H. Backstrdm. H. Backstrdm, G. F. F., XIII, p. 646, 1891. Liparite. • Q 21.3 or 20.6 ab 46.6 an 1.9 di 8.3 Carrock Fell, Eng¬ land. G. Barrow. A. Harker, Q. J. G. S., LI, p. 129, 1895. Granophyre. Q 20.3 or 23.4 ab 45.1 ac 7.4 hy 3.0 mt 0.5 Hougnatten, Sands- var Parish, Nor¬ way. L. Schmelck. W. C. Brogger, Eg. Kg., I, p. 127, 1894. Soda-granite. Q 21.5 or 21.7 ab 45.1 ac 8.8 wo 0.4 mt 3.0 Ivallerud, Svarstad Parish, Laugen- thal, Norway* L. and V. Schmelck. IV. C. Brogger, Eg. Kg., I, p. 48, 1894. Grorudite. MnO high? Near pantel- lerose. Q 24.1 or 21.7 ab 44.5 an 0.6 di 6.6 hy 3.1 Orno, Sweden. R. Mauzelius. A. Cederstrom, G. F. F., XV, p. Ill, 1893. Granite. Q 23.9 or 25.0 ab 40. 9 an 3.9 C 1.8 hy 4.4 Griesbach, Peters- thal, Baden. Tbiiracb. F. Schalch, Sp. Kte. Baden, Bl. Petersthal, p. 31, 1895. Granite. Q 25.4 or 23.4 ab41.9 ac 4.6 di 1.3 hy 2.7 Amba Subhat, Abyssinia. G. T. Prior. G. T. Prior, Min. Mag., XII, p. 262, 1900. Grorudite. 156 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS I. PERSALANE—Continued. RANG 1. PERALKALIC. LI PA RASE—Continued. No. Si0 2 Al-A Fe,0 3 FeO MgO CaO Na,0 k 2 o H,G+ H 2 0- CO., TiO, PA MnO BaO Sum Sp. gr. 19 72. 71 12. 80 2.64 1.48 0.10 0. 58 6. 50 3. 87 0. 48 trace 101.16 B3. IV 1.212 .125 .016 .021 .003 .010 .105 .041 — 20 70. 99 14. 84 3. 76 0. 35 0. 14 0.60 5. 94 2.40 0. 40 trace 99. 42 B3. IV 1.183 • .145 .024 .005 .004 .011 .096 .025 — RANG 1. PERALKALIC. LIPARASE. 1 74. 78 14. 56 3.04 n. d. trace 0. 69 6. 02 0.59 0. 42 100.10 2.64 A4. IV 1.246 .143 .019 (.038) — .012 .097 .006 2 75. 46 13.18 0.91 n. d. 0.10 0.95 6. 88 1.09 0. 93 99. 91 2.42 A3. Ill 1.258 .129 .006 (.012) .003 .017 .ill .012 3 77. 29 • 14. 62 trace n. d. 0. 38 trace 7. 60 0.16 0. 57 100. 62 A3. Ill 1.288 .143 — — .010 — .122 .002 4 . 72. 50 17. 00 1.17 n. d. 0. 74 0.20 6. 28 0. 77 1.62 100. 28 A3. Ill 1.208 .167 .007 (.014) .019 .003 .101 .008 5 71.20 17.60 1.74 n. d. 1.17 0. 76 6. 20 0. 85 1.37 100.89 A3. Ill 1.187 . .172 .011 (.022) .029 .014 .100 .009 • 0 68. 04 16.14 4. 32 0. 97 1.02 0.32 7. 62 0. 58 1. 27 100.28 A3. Ill 1.134 .158 .027 .014 .026 .005 .122 .006 l 72.34 14. 07 2. 92 n. d. 1.27 0. 41 6. 28 1.13 1.41 99. 83 At. IV 1.206' .138 .018 (.036) .032 .007 .101 .012 8 77. 66 12. 30 0. 61 0.17 0. 73 0.16 6. 96 0.19 0.46 0. 33 trace 99.57 2.634 A3. Ill 1.294 .128 .004 .003 .018 .003 .112 .002 — 9 72. 39 14. 42 0. 56 0. 30 1.85 0. 85 5. 93 1.23 1.13 0.55 trace 99.22 2. 632 A3. Ill 1.207 .141 .004 .004 .046 .016 .095 .013 — 10 78. 77 12.44 0.95 n. d. 0. 02 0. 53 6. 79 0. 24 0. 26 0.14 100.14 2. 614 A3. Ill 1.313 .122 .006 (.012) .001 .010 .110 .002 RANG 2. DOMALKALIC. TOSCANASE. 1 68. 55 16. 46 0. 85 0.56 0.17 4.17 1.92 5.59 n. d. 0. 35 0. 52 1 101.03 A2. II 1.143 .161 .005 .008 .004 .075 .030 0. 80 100. 23 2 68. 36 13. 24 1.29 3.39 1.15 2.51 2.05 5. 34 2. 63 0.27 100. 23 A3. Ill 1.139 .130 .008 .048 .029 .045 .033 .057 004 3 69.21 15. 59 1.08 1.29 0.11 1.30 1.69 8.92 0. 75 99. 94 A3. Ill 1.154 .152 .007 .019 .003 .023 .027 .094 PERSALANE-DELLENOSE. 157 ORDER 4. QUARDOFELIC. BRITANNARE—Continued. SUBRANG 4. DOSODIC. KALLERUDOSE—Continued. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. Q 21.4 or 22.8 ab 44.0 ac 7.4 ns 0.6 di 2.5 hy 1.7 Green Mountain, Ascension Island, Atlantic Ocean. C. Element. A. Renard, Challenger Reps., Pet. Oc. Islands, p. 52, 1889. Obsidian. Sum high—al¬ kalies high? Q 29.5 or 13.9 ab 50.3 an 3.1 C 1.3 hy 0.4 mt 1.2 hm 3.0 Weatherpost Hill, Ascension Island, Atlantic Ocean. C. Element. A. Renard, Challenger Reps., Pet. Oc. Islands, p. 47, 1889. Trachyte. SUBRANG 5. PERSODIC. NOYANGOSE. Q 34.0 or 3.3 ab 50.8 an 3.3 C 2.9 hy .5.0 Monhegan Island, Maine. E. C. E. Lord. E. C. E. Lord, A. G., XXVI, p. 343, 1900. Alsbachite. Q 28.9 or 6.7 ab 58.2 an 1.7 di 2.6 hy 0.5 Berkeley, California. C. Palache. C. Palache, B.Dep. G.Un. Cal., I, p. 67, 1894. Soda-rhyolite. Q 32.0 or 1.1 ab 63.9 C 1.9 hy 1.0 Brittas Bridge, County Wicklow, Ireland. F. H. Hatch. F. H. Hatch, G. M. (3), VI, p. 70, 1889. Quartz-kerato- phyre. Cited in F. Zir- kel. Lehrb. II, p. 334, 1894. Q 30.9 or 4.4 ab 52.9 an 0.8 C 4.6 hy 3.8 Prat-meur, Brittany, France. Not stated. C. Barrois, Guide Exc. VIII Cong. G. Int., VII, p. 21, 1900. Euritic aplite. Q 27.2 or 5.0 ab 62.4 an 3.9 C 5.0 hy 5.9 Rostellec, Brittany, France. Not stated. C. Barrois, Guide Exc. VIII Cong. G. Int., VII, p. 21, 1900. Euritic aplite. N Q 19.9 or 3.3 ab 63.9 an 1.4 C 2.6 hy 2.6 mt 3.2 hm 2.0 Pozoritta, Bukowina, Austria. C. v. John. C. v. John, Jb. G. R-A. Wien., XLIX, p. 561, 1899. Albite-porphy- rite. Q 26.8 or 6.7 ab 52.9 an 1.9 C 1.8 hy 8.0 St. George Monastery, Crimea, Russia. A. Lagorio. A. Lagorio, Guide Exc. VII Cong. G. Int., XXXIII, p. 27, 1897. Eeratophyre. Q 35.2 or 1.1 ab 58.7 an 0.8 C 1.1 hy 1.8 mt 0.8 Navigation Creek, Noyang, Victoria. A. W. Howitt. A. W. Howitt, T. R. Soc. Viet., XX, p. 41, 1884. Quart z-mica- porphyrite. Q 28.9 or 7.2 ab 49.8 an 4.4 C 1.7 hy 4. 6 mt 0.9 Tambo River, Noyang, Victoria. A. W. Howitt. A. W. Howitt, T. R. Soc. Viet., XX, p. 38, 1884. Quartz-mica- porphyrite. Q 36.5 or 1.7 ab 57.6 an 2.8 hy 1.6 Noyang, Victoria. A. W. Howitt. A. W. Howitt, T. R. Soc. Viet., XX, p. 46, 1884. Quartz-porphy- rite. SUBRANG 2. DOPOTASSIC. DELLENOSE. F 1.89 Q 32.9 or 33.4 ab 15.7 an 7.0 C 4.7 hy 0.4 mt 0.9 il 0.6 ft 3.9 Storholm, Sweden. H. Santesson. P. J. Holmquist, Afh. Sver. G. Und., No. 181, p. 51, 1899. Quartz-por¬ phyry. Q 26.7 or 31.7 abl7.3 anil. 1 di 1.2 hy 7.6 mt 1.9 Dellen, Helsingland, Sweden. H. Santesson. F. Svenonius, G. F. F., X, p. 273, 1888. Hypersthene- andesite. Dellenite of Brogger. Eg. Eg. II, p. 59, 1895. Q 22.0 or 52.3 ab 14.1 an 6.4 C 0.8 . hy 1. 9 mt 1.6 Wirvik, Finland. B. Frosterus. B. Frosterus, T. M. P. M., XIII, p. 188, 1892. Granite. 158 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS I. PERSALANE—Continued. RANG 2. DOMALKALIC. TOSCANASE—Continued. No. Si0 2 A1A FeA FeO MgO CaO Na 2 0 k 2 o h 2 o+ HjO— co 2 TiOo L PA MnO | BaO Sum Sp. gr. 4 66. 64 15.10 0. 69 3. 08 1.36 1.49 2. 05 6.71 2.32 99. 94 A3. Ill 1.111 .148 .004 .043 .034 .027 .033 .071 5 65.17 17. 09 1.26 2. 93 1. 75 1.39 2.16 5. 70 2. 75 . 100. 20 A3. Ill 1.086 .168 .008 .040 .044 .025 .035 .061 6 66. 24 15. 64 1.16 2.19 0. 89 2.17 2. 05 6. 60 3.25 100.19 2. 455 A3. Ill 1.102 .153 .008 .030 .022 .039 .033 .070 7 65.19 16.04 1.16 2. 48 0. 99 2. 92 2. 26 6.11 1.85 99.00 2. 509 B3. IV 1.094 .157 .007 .034 .025 .052 .036 .065 RANG 2. DOMALKALIC. TOSCANASE. 1 71.69 14. 84 n. d. 1.25 0. 37 1.03 3.13 7.09 0. 49 0.10 trace 99.99 A3. Ill 1.195 . 145 — .018 .009 .018 .050 .075 — 2 67.50 18. 23 n. d. 2.39 1.56 1.85 3. 79 4.25 0. 90 0. 08 100. 55 A4. IV 1.125 .179 — .033 .039 .033 .061 .046 3 65. 02 17. 93 4. 69 0.17 1.24 1.34 3.04 5. 98 0. 86 0. 11 100. 38 A3. Ill 1.084 . 176 .029 .002 .031 .023 .049 .064 .002 4 64. 62. 16. 46 1.82 2.14 1.10 2. 39 4. 57 5.21 0.39 0.13 0.11 0. 81 0. 21 0.12 0. 03 100. 38 Al. I 1.077 .161 .011 .030 .023 .043 .074 .055 .010 .001 .002 5 68. 88 14. 96 0. 64 4. 64 0. 37 1.74 3. 83 4.97 0. 24 0. 06 trace trace 100.33 2. 696 A3. Ill 1.148 .146 .004 .064 .009 .031 .062 .053 — — 12° 6 68. 36 16. 58 0.90 3.24 0.45 1.85 3. 97 5. 27 0.17 0.18 trace trace 100. 97 A3. Ill 1.139 .163 .006 .045 .011 .033 .064 .056 — — 7 66. 60 15. 05 1.07 4. 42 0. 36 2. 21 4.03 5.42 0.41 0. 76 trace none 100.33 2. 612 A2. II 1.110 .148 .007 .061 .009 .039 .065 .058 .009 — — 17° 8 71.23 13.64 1.70 1.00 0. 75 2. 31 3. 55 3. 79 1.72 0. 21 0. 05 99. 95 2.690 A2. II 1.187 .134 .011 .015 .019 .041 .057 .040 .003 .001 9 68. 40 15. 75 2. 97 0.65 0.12 1.64 4.16 5. 78 0. 48 trace 100. 58 2. 66 A3. Ill 1.140 .154 .019 .009 .003 .029 . 067 .062 — 10 72.57 15.11 0.59 1.02 0.30 1.65 3. 92 4.33 0. 47 trace 99. 96 A3. Ill 1.210 .148 .004 .014 .008 .030 .063 .046 — 11 71.79 15.00 0. 77 1.12 0. 51 2.50 3.09 4. 75 0. 64 100.17 A3. Ill 1.197 .147 .005 .015 .013 .045 .050 .051 12 70. 45 15.98 0. 75 1.84 0. 77 2. 60 3.83 3. 59 0.^5 100. 26 A3. Ill 1.174 .157 .005 .026 .019 .047 .061 .038 PERSALANE-TOSCANOSE. 159 ORDER 4. QUARDOFELIC. BRITANNARE—Continued. SUBRANG 2. DOPOTASSIC. DELLENOSE—Continued. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. Q 21.6 or 40.0 ab 17.3 an 7.5 C 1.7 by 8.6 mt 0.9 Der Gabel, Mtinster- thal, Schwarzwald, Baden. Bunsen’s Laboratory. A. Schmidt, Cf. N. J., 1889, 1, p. 95. Porphyry. Q 23.0 or 33.9 ab 18.3 an 7.0 C 4.8 hy 8.7 mt 1.9 \ Brandenberg, Miin- sterthal, Schwarz- wald, Baden. Bunsen’s Laboratory. A. Schmidt, Cf. N. J., 1889, I, p. 95. Porphyry. Q 21.7 or 39.8 ab 17.3 an 10.8 C 1.1 hy 5.1 mt 1.9 Mte. Cucco, Cerveteri, Italy. H. S. Wash¬ ington. II. S. Washington, J. G., V, p. 49, 1897. Toscanite. Q 19.9 or 36.1 ab 18.9 an 14.5 C 0.4 hy 6.0 mt 1.6 Castle Hill, Tolfa, it&iy- H. S. Wash¬ ington. II. S. Washington, J. G., V., p. 49, 1897. Toscanite. Sum low. SUBRANG 3. SODIPOTASSIC. TOSCANOSE. Q, 22.9 or 41.7 ab 26.2 an 5.0 C 0.2 hy 3.3 Taggart Bay, Lake Keepawa, Quebec. F. G. Wait. G. C. Hoffmann, A. R. G. S. Can., IX, p. 18 R, 1898. Granitite- gneiss. Q 20.7 or 25.6 ab32.0 an 9.2 C 4.0 hy 8.3 Lake Wieksteed, Quebec. F. G. Wait. G. C. Hoffmann, A. R. G. S. Can., IX, p. 19 R, 1898. Granite-gneiss. Q, 19.7 or 35.6 ab 25.7 an 6.4 C 4.1 hy 3.1 mt 0.5 hm 4.3 Pemigewasset, New Hampshire. L. G. Eakins. B. U. S. G. S. 148, p. 67, 1897. Quartz-por¬ phyry. ZrOo Cl FeSo NiO 0.03 0.03 0.19 none Q 11.7 or 30.6 ab38.8 an 8.9 di 2.7 hy 2.2 mt 2.6 il 1.5 Mt. Ascutney, Ver¬ mont. W. F. Hille- brand. R. A. Dalv, B. U. S.“ G. S. 148, p. 69, 1897. Diorite. Q 19.6 or 29.5 ab 32.5 an 8.6 hy 8.8 mt 0.9 Squam Light, Cape Ann, Massachusetts. H. S. Washing¬ ton. H. S. Washington, J. G., VII, p. 109, 1899. Quartz- syenite- porphyry. Q 18.2 or 31.1 ab 33.5 an 9.2 C 1.0 hy 6.2 mt 1.4 Wolf Hill, n. Glou¬ cester, Essex Co., Massachusetts. H. S. Washing¬ ton. H. S. Washington, J. G., VI, p. 800, 1898. Nordmarkite. Q 15.2 or 32.2 ab 34.1 an 7.0 di 3.4 hy 5.0 mt 1.6 il 1.3 Gloucester, Essex Co., Massachusetts. H. S. Washing¬ ton. H. S. Washington, J. G., VI, p. 798, 1898. Akerite. Dried at 110°. Q, 30.4 or 22.2 ab 29.9 an 10.3 di 0.9 hy 1.6 mt 2.6 il 0.5 Conanicut Island, Rhode Island. L. V. Pirsson. L. V. Pirsson, A. J. S., XLVI, p. 373, 1893. Granite. S 0.63 Q, 18.5 or 34.5 ab 35.1 an 7.0 di 0.8 mt 2.1 hm 1.6 Millstone Point, Con¬ necticut. H. T. VultC J. F. Kemp, B. G. S. A., X, p. 375, 1899. Granite. Q 28.7 or 25.6 ab 33.0 an 8.3 C 0.9 hy 2.1 mt 0.9 Guilford, Howard Co., Maryland. W. F. Hille- brand. G. H. Williams, 15 A. R. U. S. G. S., p. 672, 1895. 1 Granite. Dried at 100°. Q 28.7 or 28.4 ab 26.2 an 12.5 hy 2.6 mt 1.2 Woodstock, Balti¬ more Co., Mary¬ land. W. F. Hille- brand. G. H. Williams, 15 A. R. U. S. G. S., p. 672, 1895. Biotite-granite. Dried at 100°. Q 26.8 or 21.1 ab 32.0 an 13.1 C 1.1 hy 4.7 mt 1.2 Dorsey Run Cut, Howard Co., Mary¬ land. W. F. Hille- brand. 1 C. R. Keyes. 15 A. R. U. S. G. S., p. 697, 1895. Biotite-gramte. Dried at 100°. 1(50 CHEMICAL ANALYSES OF IGNEOUS ROCKS. CLASS I. PERSALANE—Continued. RANG 2. DOMALKALIC. TOSCANASE—Continued. No. ' Si0 2 A1 2 0 3 Fe 2 0 3 FeO MgO CaO Na.,0 K 2 0 h 2 o+ H a O— C0 2 Ti0 2 PA MnO BaO Sum i Sp. gr. 13 69. 56 15. 52 1.67 1.19 0. 41 1.20 4. 46 4. 68 0. 67 0. 34 none 0.31 0.08 0. 07 0.10 100. 26 Al. I 1.159 .152 .010 .017 .010 .021 .072 .050 .004 .001 .001 .001 14 67.98 14. 84 1.00 3.15 0. 91 2.17 2. 66 4. 76 0. 49 0.14 none 0. 84 0.34 trace 0. 20 99. 77 Al. I 1.133 .146 .006 .044 .023 .039 .043 .051 .010 .002 — .001 15 69.69 15.64 0. 90 1.62 0. 66 1.22 3. 34 5. 30 n.d. 0. 29 98. 66 A3. Ill 1.162 .153 .006 . 022 .017 .021 .054 .057 .004 16 66.69 16. 69 2. 06 0. 93 1.15 1.40 2. 46 5. 23 1.70 — 1.42 99. 73 A3. Ill 1.112 .163 .013 .013 .029 .025 .040 .056 17 66.10 ■ 20. 82 1.52 2.17 0. 95 1.57 2. 94 3. 48 0.54 • 100.09 A3. Ill 1.102 .204 .009 0.30 .024 .029 .047 .037 18 74. 00 12. 04 0. 78 2. 61 0. 42 0. 85 3.47 4. 33 0. 86 — 0.34 0. 06 0. 05 0.12 99. 93 2. 565 Al. I 1.233 .118 .005 .036 .011 .015 .056 .044 .004 — .001 .001 19 69. 94 15.19 1.88 0. 60 0. 92 1.15 3.95 4.29 0. 85 0.14 0. 25 0.13 0. 03 99. 32 B2. Ill 1.166 .149 .012 .008 .023 .021 .064 .046 .003 .001 — < 20 74. 37 13.12 0. 73 0. 87 0.35 1.26 2.57 6. 09 0. 25 0. 05 0. 29 0. 06 trace 0.10 100.11 Al. I 1.246 .128 .005 .011 .009 .022 .042 . 065 .004 — — — 21 64. 49 17.25 0. 86 2. 42 1.24 3. 79 4.19 4.15 0.54 0. 06 0.51 0.23 trace 0. 30 100.11 A. I 1.075 .169 .005 .034 .031 . 067 .068 .044 .006 .002 — .002 22 73.12 14. 27 0.51 0. 26 0. 24 1.10 3.43 4.90 0. 73 0.68 0. 77 0. 08 0.03 0. 06 trace 100.18 Al. I 1.219 .140 .003 .004 .006 .020 . 055 .052 .001 — .001 — 23 69. 68 14.97 0. 79 0. 34 0. 66 2.10 3. 38 4. 40 0. 92 1.10 0. 88 0. 28 0.17 trace 0.14 99. 86 Al. I 1.161 .147 .005 .005 .016 .038 0.55 0.47 .004 .001 — . .001 24 68. 60 16.13 2. 22 0. 44 0. 72 1.36 4.37 4. 89 0. 58 0. 20 0. 32 0.18 trace 0. 27 100. 37 Al. I 1.143 .158 .014 .005 .018 .024 .071 .053 .004 .001 — .002 25 67.44 15. 78 1.58 0. 85 1.43 2. 38 4.11 4.87 0. 70 0. 32 0. 32 0.21 trace 0. 24 100.32 Al. I 1.124 .154 .010 .012 .036 .043 .066 .052 .004 .001 — .002 26 67.04 15. 25 1.69 1. 13 1.75 2.17 4.09 5. 10 0.56 0.51 0. 20 0. 21 0.05 0. 33 100.11 Al. I. 1.117 .150 .011 .015 .049 .039 .066 .055 .003 .001 .001 .002 27 66. 29 15.09 1.37 1.17 2.39 2. 38 3. 96 4. 91 0. 60 0.39 0. 45 0. 27 0. 15 0. 06 0.30 99. 85 Al. I 1.105 .148 .009 .017 .060 .043 .064 .052 .003 .001 .001 .002 28 64. 64 16. 27 2. 42 1.58 1.27 2. 65 4.39 4.98 0. 27 0. 09 0.37 0.51 none trace 0.18 100.12 Al. I 1.078 .160 .015 .022 .032 .048 .071 .054 .006 — — .001 29 69. 95 15.14 0.38 0. 83 0.56 1.45 2. 70 6. 36 0. 91 0. 40 0. 37 0.24 0.10 0.08- 0.13 100.06 Al. I 1.166 .148 .002 .011 .014 .026 .043 .068 .003 .001 .001 .001 PE RSA L A N E-TOSCANOSE. 161 ORDER 4. QUARDOFELIC. BRITANNARE—Continued. SUBRANG 3. SODIPOTASSIC. TOSCANOSE—Continued. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. s SrO l.i.,0 trace trace trace Q 22.3 or 27.8 ab37.7 an 5.8 C 0.9 hy 1.4 mt 2.3 il 0.6 Monterey Mt., Vir¬ ginia. W. F. Hille- brand. Darton and Keith, A. .1. S., VI. p. 307, 1898. Felsophyre. so 3 Cl F s SrO Org. trace trace trace 0.08 trace 0.21 Q 26.4 or 28.4 ab22.5 an 10.8 C 1.3 hy 6.0 mt 1.4 il 1.5 Near Rowland, Bar¬ tow Co., Georgia. H. N. Stokes. A. H. Brooks, B. U. S. G. S. 168, p. 55, 1900. Augite-micro- cline-granite. Org. =graphite. Q 25.5 or 31. 7 ab 28.3 an 5.8 C 2.1 hy 3.3 mt 1.4 il 0.6 Felch Mountain, Michigan. H. N. Stokes. II. L. Smith, M.U.S.G.S., XXXVI, p. 389, 1899. Granite. Sum low because II 2 0 not deter¬ mined. Q 27.4 or 31.1 ab21.0 an 7.0 C 4.3 hy 2.9 mt 3.0 Upper Quinnesec Falls, Menominee River, Wisconsin. R. B. Riggs. G. H. Williams, B. U. S. G. S. 62, p. 121, 1890. Quartz-por¬ phyry. Dried at 105°. Q 29.7 or 20.6 ab 24.6 an 8.1 C 9.3 hy 5.2 mt 2.1 Athelstane, Wiscon¬ sin. W. W. Daniells. E. R. Bucklev, B. IV. G. Nh. S.Wis., p. 148, 1898. Granite. A1 2 0 3 high? Cl Li«0 trace trace Q 33.2 or 25.0 ab 29.3 an 4.2 hy 4.6 mt 1.2 il 0.6 Pigeon Point, Minne¬ sota. W. F. Hille- brand. W. S. Bavley, A. J. S', XXXVII, p. 59, 1889. Quartz-kerato- phyre. Dried at 105°. 3 specimens. NiO trace Q 26.5 or 25.6 ab 33.5 an 5.8 C 1.8 hy 2.3 mt 1.2 il 0.5 hm 1.1 6 m. E. of Ironton, Missouri. W. H. Melville. E. Haworth, A. R. Mo. G. S., VIII, p. 181, 1890. Granite. Sum low. SrO Li s O trace trace Q 33.1 or 36.1 ab 22.0 an 5.8 hy 1.2 mt 1.1 il 0.6 Big Timber Creek, Crazy Mountains, Montana. W. F. Hille- brand. J. E. Wolff, B. U. S. G. S. 148, p. 142, 1897. Granitite. SrO Li 2 0 0.08 trace Q 13.5 or 24.5 ab 35.6 an 15.8 di 2.4 hy 4.9 mt 1.2 il 0.9 Sweet Grass Creek, Crazy Mountains, Montana. W. F. Hille- brand. J. E. Wolff, B. U. S. G. S. 148, p. 142, 1897. Porphyrite. SrO Li 2 0 trace trace Q 31.9 or 28.9 ab 28.8 an 5.6 C 1.3 hy 0.6 mt 0.8 Yogo Peak, Little Belt Mountains, Montana. W. F. Hille- brand. L. V. Pirsson, 20 A.R.U. S.G.S., III, p. 523, 1900. Rhyolite-por¬ phyry. so 3 Cl SrO trace trace 0.00 Q 27.4 or 26.1 ab 28.8 an 10.6 C 0.7 hy 1.6 mt 0.2 il 0.6 hm 0.6 Wolf Butte, Little Belt Mountains, Montana. W. F. Hille- brand. L. V. Pirsson, 20 A.R.U. S. G. S., Ill, p. 499, 1900. Granite-por¬ phyry. so 3 Cl SrO trace trace 0.09 Q 20.0 or 29.5 ab37.2 an 6.7 C 1.0 hy 1.8 mt 0.2 il 0.6 hm 2.1 Mount Barker, Little Belt Mountains, Montana. W. F. Hille- brand. L. V. Pirsson, 20 A. R. U. S. G. S., III, p. 505, 1900. Granite-por¬ phyry. S0 3 Cl SrO trace trace 0.09 Q 18.1 or 28.9 ab34.6 an 10.0 di 1.5 hy 2.9 mt 1.8 il 0.6 hm 0.3 Thunder Mountain, Little Belt Moun¬ tains, Montana. H. N. Stokes. L. V. Pirsson, 20 A.R.U. S.G. S-, III, p. 509, 1900. Granite-por¬ phyry. SrO 0.03 Q 16.4 or 30.6 ab34.6 an 8.1 di 2.3 hy 4.1 mt 2. 6 il 0.5 Big Baldy Mountain, Little Belt Moun¬ tains, Montana. W. F. Hille- brand. L. V. Pirsson, 20 A.R.U.S.G.S., Ill, p. 511, 1900. Quartz-syenite- porphyry. SrO LUO 0.07 trace (1 16.1 or 28. 9 ab 33.5 an 8.9 di 2.4 hy 5.4 mt 2.1 il -0.5 Sheep Creek, Little Belt Mountains, Montana. W. F. Hille- brand. L. V. Pirsson, 20 A.R.U. S. G.S.,111, p. 497, 1900. Granite-syenite- aplite. ZrO-> S0 3 ' Cl SrO 0.37 trace 0.05 0.08 Q 12.6 or 30.0 ab 37.2 an 9.7 di 3.0 hy 2.8 mt 3.5 il 0.9 Wright and Edwards Mine, Barker, Lit¬ tle Belt Mts., Mont. W. F. Hille- brand. L. V. Pirrson, 20A.R.U. S.G.S.,Ill, p. 466, 1900. Syenite. Zr0 2 FeSj SrO LioO Cu 0.02 0.39 0.02 trace 0.03 Q 25.5 or 37.8 ab‘22.5 an 7.2 C 1.1 hy 2.7 mt 0.5 il 0.5 Modoc Mine, Butte District, Montana. W. F. Hille- brand. W. H. Weed, B. U. S. G. S. 168, p. 119, 1900. Quartz-por¬ phyry. Near dellenose. 14128—No. 14—03 11 162 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS I. PERSALANE—Continued. RANG 2. DOMALKALIC. TOSCAXASE—Continued. No. Si0 2 ALA 1 FeA FeO j l MgO CaO Na 2 0 to O 1_ h 2 o+ H 2 0- co 2 Ti0 2 1 PA MnO BaO Sum Sp. gr. 30 67. 12 15. 00 1.62 2.23 1. 74 3. 43 2.76 4. 52 0. 58 0.09 none 0. 48 0.15 0. 06 0. 07 99. 88 Al. I 1.119 .147 .010 ' .031 .044 .061 .044 .048 .006 .001 .001 — 31 68.42 15.01 0.97 1.93 1.21 2. 60 3. 23 4. 25 0. 73 0. 54 0. 20 0. 50 0.13 0. 06 0.12 99.95 Al. I 1.140 .147 .006 .027 .030 .047 .051 .046 .006 .001 .001 .001 32 73. 84 12. 47 0. 32 0. 90 0. 25 1.08 2. 88 5.38 2. 76 trace 99.88 A3. Ill 1.231 .122 .002 .012 .006 .020 .047 .058 — 33 71.85 13.17 2.17 1.34 0. 63 2. 25 4. 06 3. 89 0.43 0.43 0.14 0.12 100.48 A2. II 1.198 .129 .014 .018 .016 .040 .065 .041 .005 .001 .002 34 71.62 14. 99 1.27 1.01 0. 74 1.33 3.62 4.81 0.41 0. 08 trace 0.17 100.05 A2. II 1.194 .147 .008 .014 .019 .023 .058 .051 .001 .002 35 69. 45 14. 92 3.16 0. 23 0.05 1.19 3.19 5.95 1.69 0.19 0. 06 0.07 0. 03 100.18 Al. I 1.158 .146 .020 .003 .001 .021 .051 .064 .002 — .001 — 36 64.40 15. 77 2. 47 1.15 2.12 3. 54 4.10 3. 81 1.93 0. 31 0. 40 0.16 0. 04 100.37 Al. I 1.073 .154 .015 .016 .053 .063 .066 .041 .005 .001 37 73. 50 14.87 0. 95 0. 42 0. 29 2.14 3.46 3. 56 0. 90 none none 0. 03 none 100.12 Al. I 1.225 .146 .006 .006 .007 .038 .056 .038 — — 38 67. 29 15. 78 1.86 1.97 0. 72 2. 36 3.77 3. 55 2.10 0. 27 none 0. 28 0. 21 none 100.16 Al. I 1.122 .154 .012 . .028 .018 .042 .061 .038 — .002 .003 — 39 68. 60 16. 21 1.67 1.57 1.05 2. 61 3. 29 3. 88 0. 92 0.19 none 0. 21 0. 09 100. 32 2. 640 Al. I 1.143 .159 .010 .022 .026 .047 .053 .041 — .001 .001 27° 40 65. 94 16. 00 0. 60 1.74 1.02 2. 87 3. 85 4. 56 1.13 1.55 none 0. 23 none 100. 26 2. 672 A2. II 1.099 .157 .004 .024 .026 .051 .062 .049 — .002 — 21° 41 65.51 17. 01 none 2.79 0.90 3.16 3.82 4. 67 1.78 0.13 100.15 2.666 A2.II 1.092 .167 — .039 .023 .056 .061 .050 .001 26° 42 70. 87 15.18 2.18 0.12 0. 60 1.58 3.47 5. 04 1.08 trace trace trace 100 .12 A2. II 1.181 .149 .014 .002 .015 .029 .056 .054 — — — 43 63. 88 19. 96 2. 21 0. 57 0. 58 2. 03 4. i9 3.88 2. 63 trace 99. 93 A3. Ill 1.065 .195 .014 .008 .015 .036 .068 .041 — 44 71.56 14.91 1.47 1.04 0.08 1.98 3. 78 4. 94 0.44 trace 100. 20 2. 59 A3. Ill 1.193 .146 .009 .014 .002 .036 .061 .053 — 18° 45 68. 85 17.01 1.78 0. 65 trace 1.62 3. 44 5.11 1. 79 trace 100. 25 2. 489 A3. Ill 1.148 .167 .011 .009 — .029 .055 .055 14° 46 68. 61 16. 43 0. 73 1.52 0.05 1.79 2. 82 4. 65 3. 35 99. 95 2. 423 A3. Ill 1.144 .161 .005 .021 .001 .032 .045 .050 14° PERSALANE-TOSCANOSE. ORDER 4. QUARDOFELIC. BRITANNARE—Continued. SUBRANG 3. SODIPOTASSIC. TOSCANOSE—Continued. 163 Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. S0 3 Cr»0 3 Sr5 LioO trace none 0.03 trace Q 23.5 or 26.7 ab 23.1 an 15.3 di 1.4 hy 5.0 rnt 2.3 il 0.9 Near Boulder, Mon¬ tana. H. N. Stokes. W. II. Weed, J. G., VII, p. 739, 1899. Granite. S NiO SrO 0.02 none 0.03 Q 25.1 or 25.6 ab 26.7 an 13.1 C 0.3 hy 5.0 mt 1.4 il 0.9 Idaho-Hailey Mine, Hailey, Idaho. W. F. Hille- brand. W. Lindgren, 20 A. R.U. S.G. S., Ill, p. 81, 1900. Quartz-mon- zonite. Q 32.9 or 32.2 ab 24.6 an 4:7 di 0.8 hy 1.5 mt 0.5 Midway Geyser Basin, Yellowstone National Park. II. N. Stokes. J. P. Iddings, B. U. S. G. S. 150, p. 153, 1898. Rhyolite-per¬ lite. Q 28.9 or 22.8 ab 34.1 an 6.4 di 3.5 mt 3.2 il 0.6 Tow r er Creek, Yel¬ lowstone National Park. F. A. Gooch. J. P. Iddings, M.U. S.G. S., XXXII, p. 426, 1899. Rhyolite. Cl trace Q, 28.1 or 28.4 ab 30.4 an 6.4 C 1.5 hy 2.8 mt 1.9 Hurricane Ridge, Crandall Basin, Yel¬ lowstone Natl. Pk. L. G. Eakins. J. P. Iddings, M.U. S.G. S., XXXII, p. 261,1899. Aplite. Q 25.6 or 35.6 ab 26.7 an 5.8 C 1.0 il 0.3 hm 3.2 Sunset Peak, Bear Gulch, Yellowstone National Park. L. G. Eakins. J. P. Iddings, M.U. S.G. S., XXXII, p. 325, 1899. Rhyolite. NiO 0.17 Q 16.1 or 22.8 ab 34.6 an 13.1 di 3.4 hy 3.7 mt 2.6 il 0.8 hm0.6 Hurricane Ridge, Crandall Basin, Yel¬ lowstone Natl. Pk. W. H. Mel¬ ville. J. P. Iddings, M.U. S.G. S., XXXII, p. 261, 1899. l Quartz-mica- diorite- porphyry. SrO trace Q 34.7 or 21.1 ab 29.3 an 10.6 C 1.4 hy 0.7 mt 1.4 Prospect Mt., Mosqui¬ to Range, Leadville District, Colorado. L. G. Eakins. W. Cross, M. U.S. G. S., XII, p. 326, 1886. Quartz-por¬ phyry. SrO Li 3 0 none trace Q, 24.6 or 21.1 ab 32.0 anil. 7 C 1.3 hy 3.9 mt 2.8 Sugar Loaf, Ten Mile District, Colorado. L. G. Eakins. W. Cross, 14 A. R. U. S. G. S., p. 227, 1894. Quartz-por- phyrite. Cl SrO 0.03 trace Q 26.8 or 22.8 ab 27.8 an 13.1 C 1.8 hy 4.3 mt 2.3 McNulty Gulch, Leadville, Colo¬ rado. W. F. Hille- brand. W. Cross, B. U. S. G. S. 148, p. 176, 1897. Granite-por¬ phyry. FeSo 0.60 Q 17.4 or 27.2 ab 32.5 an 12.8 di 1.1 hy 4.7 mt 0.9 pr 0.6 Jefferson Tunnel, Leadville, Colorado. W. F. Hille- brand. W. Cross, B. U. S. G. S. 148, p. 176, 1897. Granite-por¬ phyry. Cl S trace 0.38 Q 15.2 or 27.8 ab 32.0 an 15.6 hy 7.4 Jefferson Tunnel, Leadville, Colorado. L. G. Eakins. W. Cross, B. U. S. G. S. 148, p. 176, 1897. Granite-por¬ phyry. Same as No 40. Q 26.9 or 30.0 ab 29.3 an 8.1 C 1.0 hy 1.5 mt 0.5 hm 1.9 Pennsylvania Hill, Rosita Hills, Colo¬ rado. L. G. Eakins. W. Cross, 17 A. R. U. S. G. S., II, p. 324, 1896. Rhyolite. Q 19.4 or 22.8 ab 35.6 an 10.0 C 5.1 hy 1.5 mt 2.8 Robinson Plateau, Silver Cliff, Colo¬ rado. L. G. Eakins. W. Cross, 17 A. R. U. S. G. S.,II, p. 321, 1896. Andesite. “Decomposed.” Q 26.0 or 29.5 ab 32.0 an 8.9 di 1.0 hy 0.4 mt 2.1 Round Mountain, Elk Mountains, Colo¬ rado. L. G. Eakins. W. Cross, B. U. S. G. S. 148, p. 177, 1897. Rhyolite. Q 25.8 or 30.6 ab 28.8 an 8.1 C 2.9 mt 2.5 Summit District, Rio Grande County, Colorado. L. G. Eakins. W. Cross, B. U. S. G. S. 148, p. 179, 1897. Rhyolite. Q 29.6 or 27.8 ab 23.6 an 8.9 C 3.5 hy 2.2 mt 1.2 Del Norte, Rio Grande County, Colorado. L. G. Eakins. W. Cross, B. IJ. S. G. S. 148, p. 179, 1897. Rhyolite. 104 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS I. PERSALANE—Continued. RANG 2. DOMALKALIC. TOSCANASE—Continued. No. Si0 2 A1A Fe 2 0 3 EeO MgO CaO Na 2 0 O N M 1 h 2 o+ h 2 o- co 2 Ti0 2 PA MnO BaO Sum Sp.gr. 47 65. 70 15. 31 2. 54 1.62 1.62 2. 56 3.62 4. 62 0.42 0.17 none 0. 72 0. 33 trace 0.12 99. 53 2. 720 Al.I 1.095 .150 .015 .022 .041 .047 .058 .049 .009 .002 .001 . 34° 48 69. 52 15.44 1.90 0. 09 0.17 1.70 4.54 5.04 0. 27 0. 33 0.17 0. 23 0.14 0.08 0. 19 99. 90 Al.I 1.169 .151 .012 .001 .004 .030 .073 .054 .003 .001 .001 .001 49 66.12 17. 21 2. 43 trace 0. 35 2.11 4. 70 5.57 0.71 0.14 0. 29 0.11 0. 08 0. 25 100.18 Al.I 1.102 .168 .015 .009 .038 .076 .060 .004 .001 .001 .002 50 74. 49 14.51 0.57 0. 32 trace 1.03 3. 79 4. 64 0. 64 trace 99.99 A3. Ill 1.242 .142 .004 .004 — .018 .061 .050 — ’ 51 71.56 14. 28 0. 89 none 0. 42 1.18 3. 00 4. 37 0. 79 0. 36 none 0.38 none trace 0. 28 100. 01 Al.I 1.193 .140 .006 — .011 .021 .048 .047 .005 — — .002 52 69. 18 14. 37 2. 52 0. 57 0. 70 1.88 3. 58 5.00 0.25 0. 35 0. 69 0. 26 0.10 0.09 99. 55 Al. I 1.153 .141 .015 .008 .018 .034 .058 .054 .008 .002 .001 .001 53 75. 01 13. 88 0. 74 n. d. 0. 09 1.00 3. 52 4. 89 0. 26 0.11 none 0.06 trace trace 0.10 99.66 A2. II 1.250 .136 .005 (.010) .002 .018 .056 .053 .001 — — .001 54 73.51 14. 42 0. 46 1.49 0. 33 1.26 4. 03 4. 29 0. 40 0.04 trace 100. 23 A3. Ill 1.225 .141 .003 .021 .008 .022 .064 .046 — — 55 73. 64 13. 44 0. 60 0. 74 0. 26 1.26 3.51 4 50 1.99 0.11 0. 06 0. 06 0.11 100. 30 Al. I 1.227 .132 .004 .010 .007 .022 .056 .048 .001 — .001 .001 56 73. 25 13. 25 none 1. 74 0. 28 2. 23 2. 69 3. 79 1.03 0.07 1.05 i race trace trace trace 99.96 Al. I 1.221 .130 .024 .007 .039 .043 .061 — -—- — — 57 72. 40 14. 81 0.81 0. 88 0.47 1.94 3. 91 3. 90 0. 59 0. 18 0. 03 0.07 0.10 100.13 Al.'I 1.207 .145 .005 .012 .012 .035 .063 .041 .002 — .001 .001 58 71.39 14.13 0. 63 0. 37 0.08 1.01 2. 89 5.69 3. 32 0.42 0.17 0. 03 trace 0. 09 100. 22 Al. I 1.190 .138 .004 .005 .002 .018 .047 .061 .002 — — .001 59 76.03 13. 39 0. 48 0. 31 0.05 1.28 2. 98 5.18 0. 34 0.15 0. 07 0.03 trace 0. 04 100. 33 Al. I 1.267 .121 .003 .005 .001 i023 .048 .055 .001 — — — 60 75.97 13.07 0. 61 0. 39 0.14 1.49 2.51 5. 62 0. 24 0.14 none 0. 09 trace trace 0.14 100. 44 Al. I 1.266 .128 .004 .005 .004 .027 .040 .060 .001 — — .001 61 71.08 15.90 0. 62 1.31 0.54 2. 60 3.54. 4. 08 0. 30 none trace 0.22 0.10 0.15 0. 04 100. 60 Al. I 1.185 .156 .004 .018 .014 .047 .057 .043 .003 .001 .002 — 62 65. 81 15.11 1.85 1.40 0. 37 1.98 2. 59 5.24 n. d. 0.54 0. 23 0.10 95. 22 2. 38 A2. II 1.097 .148 .012 .019 .009 .036 .042 .056 .007 .002 63 62. 33 17.30 3.00 1.63 1.05 3. 23 4.21 4.46 0. 75 0.44 1.05 0. 29 0. 08 0.24 100. 33 Al. I 1.039 .170 .019 .022 .026 .057 .068 .048 .013 .002 .001 .002 PERSALANE-TOSCANOSE. 165 ORDER 4. QUARDOFELIC. BRITANNARE—Continued. SUBRANG 3. SODII’OTASSIC. TOSCANOSE—Continued. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. so 3 Cl SrO Li 2 0 0.12 0.03 0.03 trace Q 19.1 or 27.2 ab 30. 4 an 12.1 C 0.4 hy 4.1 mt 3. 5 il 1.4 Near San Miguel Peak, Telluricle, Colo¬ rado. H. N. Stokes. W. Cross, Telluride folio, U. S. G. S., p. 6, 1899. Quartz-monzo- nite. ZrO.> SrO" 0.05 0.04 Q 21.1 or 30.0 ab 38.3 an 6.7 di 0.9 il 0.2 hm 1.9 tn 0.4 Robbin’s Ranch, Pikes Peak, Colo¬ rado. W. F. Hille- brand. W. Cross, B. U. S. G. S. 148, p. 163, 1897. Trachyte? ZrO.) SrO 0.06 0.05 Q 12.4 or 33.4 ab 39.8 an 8.9 di 0.4 hy 0.9 hm 2.4 tn 0.7 Wicher Mountain, Pikes Peak, Colo¬ rado. W. F. Hille- brand. W. Cross, B. U. S. G. S. 148, p. 163, 1897. Trachyte? LioO trace Q 32.4 or 27.8 ab 32.0 an 5.0 C 1.3 mt 0.9 Thomas Range, Utah. L. G. Eakins. W. Cross, Pr. Colo. Sc. Soc., II, p. 69, 1887. Rhyolite. FeS., Cr 2 0 3 v 2 o 3 SrO LioO As 2.29 trace 0.02 trace none trace Q 34.2 or 26.1 ab 25.2 an 5.8 C 2.5 hy 1.1 hm 0.9 pr 2.3 Swansea Mine, Tintic District, Utah. H. N. Stokes. Tower and Smith, 19 A. R. U. S.G.S., III, p. 637, 1899. Quartz-por¬ phyry. Cl Cr 2 0 3 v 2 o 3 MoO SrO trace trace 0.01 trace trace Q 24.0 or 30.0 ab 30.4 an 8.1 di 1.1 hy 1.3 il 1.2 hm 2.5 S. of Pinvon Creek, Tintic District, Utah. H. N. Stokes. Tower and Smith, 19 A. R. U. S. G. S., Ill, p. 634, 1899. Rhyolite. SrO LioO trace trace Q 32.9 or 29.5 ab 29.3 an 5.0 C 0.9 hy 1.5 Skwentna River, Alaska. H. N. Stokes. J. E. Spurr, A. G., XXV, p. 231, 1900. Alaskite. Q 29.7 or 25.6 ab 33.5 an 6.1 C 0.9 hy 3.2 mt 0.7 Medicine Lake, Modoc County, California. L. G. Eakins. J. S. Diller, B. U. S. G. S., 148, p. 228, 1897. Rhyolite-obsid¬ ian. SrO Li.,0 0.02 trace Q 32.8 or 26. 7 ab 29.3 an 6.1 C 0.6 hy 1. 6 mt 0.9 Slate Creek, Tehama County, California. W. F. Hille- brand. J. S. Diller, B. U. S. G. S., 148, p. 192, 1897. Rhyolite. Dried at 110°. FeS.» SrO' LioO 0.58 trace? trace Q 30.1 or 33.9 ab 22.5 an 7.2 di 3.2 hy 2.3 Tower Rock, Grizzly Mountains, Plumas County, California. W. F. Hille- brand. H. W. Turner, 14 A. R. U. S. G. S., II, p. 484, 1894. Quartz-por¬ phyry. SrO Li 2 0 0.04 trace Q 29.6 or 22.8 ab 33.0 an 9.7 C 0.7 hy 2.1 mt 1. 2 Mount Stover, Plumas County, California. W. F. Hille- brand. J. S. Diller, B. U. S. G. S., 148, p. 192, 1897. Rhyolite. Dried at 110°. SrO Li.jO trace trace Q 30.2 or 33.9 ab24.6 an 5.0 C 1.2 hy 0.4 mt 0.9 Near Grizzly Peak, Plumas County, California. W. F. Hille- brand. H. W. Turner, J. G., Ill, p. 407, 1895. Rhyolite. SrO LioO trace trace Q 36.3 or 30.6 ab25.2 an 5.0 di 1.0 mt 0.7 Yuba Gap, Sierra County, California. W. F. Hille- brand. H. W. Turner, J. G., Ill, p. 403, 1895. Aplite. Near tehamose. Cr 2 0 3 NiO SrO LioO none none 0.03 trace Q 36.4 or 33.4 ab 21.0 an 7.5 hy 0.6 mt 0.9 East of Milton, Sierra County, Cali¬ fornia. W. F. Hille- brand. H. W. Turner, J. G., VII, p. 160, 1899. Aplite. Near tehamose. ZrOo so 3 - C1 SrO Li 2 0 0.08 none 0.02 0.02 trace Q 27.8 or 23.9 ab29.9 an 13.1 C 0.9 hy 3.3 mt 0.9 El Capitan, Yosemite Valley, California. W. Valentine. H. IV. Turner, J. G., VII, p. 143, 1899. Biotite-granite. Q 25.7 or 31.1 ab 22.0 an 10.0 C 1.4 hy 0.9 mt 2.8 il 1.1 Griswold Creek, Cali¬ fornia. G. Steiger. F. L. Ransome, A. J. S., V, p. 363, 1898. Biotite-augite- latite. H 2 0 not de¬ termined. ZrOo FeS.' v»o 3 SrO LioO Org. 0.04 0.06 0.01 0.05 trace 0.11 Q 12.4 or 26.7 ab35.6 an 15.0 di 0.8 hy 2.3 mt 2.1 il 2.0 hm 1.6 Clover Meadow, Tuo¬ lumne County, Cal¬ ifornia. W. F. Hille- brand. H. W. Turner, 17 A. R. U. S. G. S., II, p. 727, 1896. Trachyte. “Latite,” cf. F. L. Ran¬ some, B. U. S. G. S. 89, p. 58, 1898. 166 CHEMICAL ANALYSES OF IGNEOUS ROCKS. CLASS. I. PERSALANE—Continued. RANG 2. DOMALKALIC. TOSCANASE—Continued. No. Si0 2 A1 2 O s FeA FeO MgO O 9= o Na 2 0 k 2 o h 2 o+ H 2 0- co 2 TiG 2 PA MnO BaO Sum Sp. gr. 64 70.43 15.51 0. 96 1.28 0. 37 2. 76 2. 75 5.14 0. 40 0. 08 none 0. 24 0.11 trace 2. 20 100.28 Al. I 1.174 .152 .006 .018 .009 .049 .044 .055 .003 .001 .001 65 72. 48 14. 06 0. 89 1.05 0. 62 2.17 3. 30 4. 75 0. 35 0.16 0. 28 0. 09 trace 0.08 100. 28 Al. I 1.208 .138 .006 .015 .016 .039 .053 .051 .004 .001 — .001 66 66. 83 15. 24 2. 73 1.66 1.63 3. 59 3.10 4.46 0. 56 none trace 0. 54 0.18 0. 10 0.11 100. 82 Al. I 1.114 .149 .017 .023 .041 .064 .050 .048 .007 .001 .001 .001 67 67. 39 15.99 0. 56 1.99 0. 77 1.63 4. 74 4. 80 2. 06 99. 93 A3. Ill 1.123 .156 .003 .028 .019 .029 .076 .051 68 70. 39 14. 09 0. 53 2.12 0. 62 3. 08 3. 70 3.51 2. 50 100.54 2.41 A3. Ill 1.173 .138 .003 .030 .016 .055 .059 .037 69 69. 96 15. 78 2.50 n. d. 0.64 1.73 3. 80 4.12 1.53 100. 07 A4. IV 1.166 .155 .016 (.032) .016 .030 .061 .043 70 75. 08 13. 63 1.35 0. 28 0.17 1.22 3. 79 4. 22 0. 23 0.03 0. 06 trace 100. 06 2. 354 A2. II 1.251 .134 .009 .004 .004 .021 .061 .045 — — — 71 68. 40 * 16. 89 2. 95 n. d. trace 1.50 4. 25 3.98 1.94 99. 91 A4. IV 1.140 . 1G5 .019 (.038) — .027 .069 .042 72 70. 48 14. 24 3. 72 n. d. 0. 40 1.48 3. 66 4. 26 1.59 99. 83 A4. IV 1.175 .140 .023 (.046) .010 .027 .059 .046 73 67. 79 16.30 4.43 n. d. 1.45 2. 32 3. 49 3. 48 0. 95 0. 27 100.98 A4. IV 1.130 .160 .027 (.054) .036 .041 .056 .037 .002 • 74 75. 74 13. 71 0. 55 n. d. trace 1.26 3. 72 4. 69 0. 46 0.17 100. 30 A3. Ill 1.262 .134 .003 (.006) — .022 .060 .050 .002 75 70.54 14. 77 3. 70 n. d. 0. 36 1.68 4. 66 4. 82 0.44 99. 97 A4. IV 1.176 .145 .023 (.046) .009 .030 .075 .051 76 62. 35 19.50 3.05 2. 25 1.46 2. 40 2. 71 3. 28 0. 75 1.25 0.18 99. 18 B2. Ill 1.039 .191 .019 .031 .037 .043 .044 .035 .015 .002 77 70.05 14. 78 n. d. 3. 37 0.44 3. 42 3.10 4.13 0.42 0.19 0. 22 100.12 A3. Ill 1.168 .145 — .048 .011 .060 .050 .043 .002 .003 78 72. 76 14.89 0. 95 n. d. 0.46 1.26 4. 25 4. 50 0. 54 trace 0.13 99. 74 A3. Ill ' 1.213 .146 .006 (.012) .012 .023 .069 .048 — .001 79 71.21 13. 95 0. 65 2. 22 0. 94 2. 28 2. 87 4. 86 0. 89 0.42 100. 29 A3. Ill 1.187 .137 .004 .030 .024 .039 .047 .052 .006 80 69. 79 14. 23 0.10 2.58 0. 61 1. 73 3. 27 4. 45 3.19 0. 24 100.19 A3. Ill 1.163 .140 .001 .036 .015 .030 .053 .047 .003 PERSALANE—TOSCANOSE. 167 ORDER 4. QUARROFELIC. BRITANN ARE—Continued. SUBRANG 3. SODIPOTASSIC. TOSCANOSE—Continued. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. FeS.j trace SrO 0.05 Li«0 trace Q 27.8 or 30.6 ab 23.1 an 23. 6 C 0.4 hy 2.2 mt 1.4 il 0.5 North Fork of Tuo¬ lumne River, Ama¬ dor County, Cal. W. F. Hille- brand. H. W. Turner, J. G., VII, p. 143, 1889. Biotite-granite. SrO trace • Q 29.4 or 28.4 ab 27.8 an 9.5 di 1.1 hy 1.7 mt 1.4 il 0.6 Lake Tenaya, Mari¬ posa County, Cali¬ fornia. W. F. Hille- brand. H. W. Turner, 14 A. R. U.S. G.S., II, p. 482, 1894. Granite-por¬ phyry. V Zr0 2 0.04 S0 3 none Cl 0.02 SrO 0.03 LioO trace Q 22.2 or 26.7 ab 26.2 an 14.2 di 2.6 hy 3.4 mt 3.9 il 1.1 Nevada Falls Trail, Yosemite Valley, California, W. Valentine. H. W. Turner, J. G., VII, p. 152, 1899. Quartz-mon- zonite. “Granite” in B. U. S. G. S.168, p. 208, 1900. Q 15.5 or 28.4 ab 39.8 an 8.1 hy 5.2 mt 0.7 Mono Lake, Cali¬ fornia. W. H. Melville. W. Lindgren, B. U. S. G. S., 150, p. 149, 1898. Rhyolite- pumice. H a O includes S Q 27.4 or 20.6 ab 30.9 an 11.7 % di 3.2 hy 3.6 mt 0.7 Northwest Harbor, San Clemente Island, California. W. S. T. Smith. W. S. T. Smith, 18 A. R. U. S. G. S., II, p 488, 1898. Rhyolite. Q 26.0 or 23.9 ab 32.0 an 8.3 C 2.1 hy 5.8 McClellan Peak, Washoe, Nevada. F. A. Gooch. Hague and Iddings, B. U. S. G. S., 17, p. 33, 1885. Dacite. • Q 34.1 or 25.0 ab32.0 an 5.8 C 0.7 hy 0.4 mt 0.9 hm 0.8 Lagune di Maricunga, Chile. F. Wolff. ■ F. Wolff, Z. D. G. G., LI, p. 546, 1899. Liparite. 9 Q 22.9 or 23.4 ab 36.2 an 7.5 C 2.8 hy 5.0 Maskordshnur, Ice¬ land. C. W. Schmidt. C. W. Schmidt, Z. D.G.G., XXXVII, p. 744, 1885. Liparite. Q, 26.1 or 25.6 ab 30.9 an 7.5 C 0.8 hy 7.1 Slieve-na-Gloch, Carl- ingford, Ireland. S. Haughton. W. J. Sollas, T. R. Ir. Ac., XXX, Pt. XI, p. 491, 1894. Granite. Q 24.0 or 20.6 ab 29.3 an 11.4 C 2.7 hylO. 8 Ferrieres, Esterel, France. Riist. A. Michel-Levy, B,S. C. G. Fr., No. 97, p. 27, 1897. Quartz-por¬ phyry. Q. 33.2 or 27.8 ab 31.4 an 6.1 C 0.2 hy 0.5 il 0.3 Lier, Norway. R. Mauzelius. W. C. Brogger, Z. K., XVI, p. 77, 1890. Granite. Q 19.0 or 28.4 ab 39.3 an 5.3 di 2.7 hy 5.5 Loken, n. Holmes- trand, Norway. G. Forsberg. W. C. Brogger, Z. K„ XVI, p. 57, 1890. Aegirite-gran- ite. * Q 26.5 or 19.5 ab 23.1 an 12.0 C 7.0 hy 3.7 mt 3.7 il 2.3 hm 0.5 Thinghoud, Norway. s G. Sarnstrom. W. C. Brogger, Z. K., XVI, p. 46, 1890. Akerite. Sum low. Q 26.3 or 23.9 ab 26.2 an 14.5 di 2.0 hy 6.5 Kortfors, Orebro, Sweden. H. Santesson. H. Backstrom, G. F. F., XVI, p. 108, 1894. Granite. Q 26.5 or 26.7 ab 36.2 an 6.4 C 0.6 hy 2.8 Hamphorfva, Smaland, Sweden. H. Santesson. 0. Nordenskjold, Abh. Sv. G. Und., No. 135, p. 35, 1894. Microgranite. Q 27.9 or 28.9 ab 24.6 an 10.8 hy 5.9 mt 0.9 Lake Mien, Sweden. H. Santesson. N. 0. Holst, Abh. Sver. G. Und. No. 110, p. 37, 1890. Rhyolite. Q 27.2 or 26.1 ab 27.8 an 8.3 C 1.0 hy 6. i mt 0.2 Lake Mien, Sweden. H. Santesson. N. 0. Holst, Abh. Sver. G. Und. No. 110, p. 37, 1890. 1 Rhyolite. 168 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS I. PERSALANE—Continued. RANG 2. DOMALKALIC. TOSCANASE—Continued. No. Si0 2 A1A Fe 2 0 3 FeO MgO CaO Na.,0 k 2 0 I h 2 o+ h 2 o - C0 2 Ti0 2 PA MnO BaO Sum Sp. gr. 81 68. 55 14. 73 0.37 2. 56 1.39 2.83 2.88 4.10 2. 34 0.73 j ' 100. 48 A3. Ill 1.143 .144 .002 .036 .035 .050 .047 .043 .010 82 67.00 15. 79 0.02 3.10 0.97 1.77 2.14 4. 74 4. 43 99.96 A3. Ill 1.117 .155 — .043 .024 .032 .034 ! .050 83 69. 92 14. 78 1.54 1.75 1.05 1.88 2. 92 4.16 1.51 0. 43 99. 94 A3. Ill 1.165 .145 .009 .025 .026 .034 .047 .044 .006 84 69. 48 13. 88 2. 67 1. 53 0.71 2. 39 3. 74 4.44 1.19 0.15 i 100.18 A3. Ill 1.158 .136 .017 .021 .018 .043 .059 .047 .002 85 73. 38 14. 36 0. 86 0. 79 0. 46 1.33 2.85 4. 98 0. 37 0. 20 0. 22 99.80 A2. II 1.223 .141 .005 .011 .012 .023 .046 .054 .003 .003 86 71.63 16.10 1.01 n. d. 0. 26 1.72 3. 96 4.49 0. 60 99. 77 2.59 A3. Ill 1.194 .158 .006 (.012) .007 .030 .064 .048 87 66. 88 17.89 3. 75 n. d. 1.53 1.44 3.55 3. 77 1.93 0. 08 100. 82 2.68 A4. IV 1.115 .175 .024 (.048) .038 .025 .057 .040 88 65. 91 15. 58 2.07 2.19 1.41 2. 40 4. 01 3. 94 1.15 0. 11 0. 58 0.20 99.84 2.613 A2. II 1.099 .153 .013 .030 .035 .043 .064 .042 .007 .001 89 64. 55 13.62 1.23 1.24 0. 67 5.07 3. 48 4.13 1.90 3.70 0. 29 0.10 100. 03 2. 593 A2. II 1.076 .133 .007 .017 .017 .091 .056 .043 .004 .001 90 62. 20 14. 69 3.83 0. 43 1.86 2.91 2.82 5.03 2. 47 3.35 0.52 0. 20 100. 43 2.631 A2. II 1.037 .144 .024 .006 .047 .051 .045 .054 .006 .001 91 66. 75 15. 87 1.82 2. 31 0.91 1.99 3.13 4. 40 2. 74 99. 92 A3. Ill 1.113 .155 .011 .032 .022 .036 .050 .047 92 71. 53 13. 55 1.20 0. 88 1.45 3.21 2.61 3.95 1.75 100.13 A3. Ill 1.192 .133 .007 .012 .036 .057 .042 .042 93 69.94 13. 45 0. 49 4. 64 0. 67 2. 26 2.42 4.25 0. 77 0.45 0. 23 99. 71 2.712 A2. II 1.166 .132 .003 .064 .017 .040 .039 . 046 .006 .002 94 71.93 15.54 0. 59 2.10 0. 46 1.60 2.61 5.30 0.69 trace 0. 27 101.09 2.664 B2. Ill 1.199 .152 .004 .030 .012 .027 .042 .057 — .002 95 69. 66 16.98 2.54 n. d. 0. 83 1.66 3. 95 4.41 0.55 0.02 100. 70 A4. IV 1.161 .167 .016 (.032) .021 .030 .064 .047 — 96 68. 58 1 15.67 2. 95 n. d. 1.17 1 2.10 2. 36 5.01 1.30 0. 40 99. 54 A4. IV 1.143 .153 .019 (.038) .029 .038 .038 .054 .003 97 65. 82 15. 94 5. 06 n. d. trace 1.65 3.54 6.17 1.85 trace 100.03 2. 68- A4. IV 1.097 .156 .032 (.064) — .030 1 .057 .066 — 1 PERSALANE-TOSCANOSE. 169 ORDE 4. QUARDOFELIC. BRITANNARE—Continued. SUBRANG 3. SQDIPOTASSIC. TOSCANOSE—Continued. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. Q 26.0 or 23.9 ab 24.6 an 13.9 C 0.4 hy 8.0 mt 0.5 Lake Mien, Sweden. H. Santesson. N. 0. Holst, Abh. Sver. G. Und. No. 110, p. 37, 1890. Rhyolite. Q 28.9 or 27.8 ab 17.8 an 8.9 C 4.0 hy 8.1 Lake Mien, Sweden. H. Santesson. N. 0. Holst, Abh. Sver. G. Und. No. 110, p. 37, 1890. Rhyolite. Q 30.5 or 24.5 ab 24.6 an 9.5 C 2.0 hy 4.6 mt 2.1 Brusen, Helsingland, Sweden. H. Santesson. F. Svenonius, G. F. F., X, p. 273, 1888. Andesite brec¬ cia. “ Dellenite ” of Brogger. Q 25.0 or 26.1 ab 30.9 an 8.3 di 3.0 hy 0.9 mt 3.9 Dellen, Helsingland, Sweden. H. Santesson. ■ F. Svenonius, G. F. F., X, p. 273, 1888. . , Hypersthene- andesite. “Dellenite” of Brogger, Eg. Kg. II, p. 59, 1895. Q 33.1 or 30.0 ab 24.1 an 6.4 C 1.8 hy 1.6 mt 1.2 il 0.5 Lake Raslangen, Scania, Sweden. H. Santesson. . H. Backstrom, Sv. Vet. Ak. Hd., XXIX, p. 8, 1897. Granite. Q 26.6 or 26. 7 ab 33.5 an 8.3 C 1.6 hy 2.3 Lestiware, Umptek, Finland. H. Berghell. W. Ramsay, Fennia, XI, p. 72, 1894. Granite. Q 23.8 or 22.2 ab 29.9 an 7.0 C 5.4 hy 10.1 Lainersdorf, Aachen, Rh. Prussia. F. H. Hatch. A. von Lasaulx,cf N. J., 1886, I, p. 53. Granite. so 3 Org. 0.14 0.15 Q 19.9 or 23.4 ab 33.5 an 11.9 C 0.4 hy 4.8 mt 4.1 Lemberg, NaheThal, Rh. Prussia. Jacobs. K. A. Lossen, Z. D. G. G., XL, p. 203, 1888. Quartz-porpliy- rite. S0 3 for S. so 3 0.05 Q 20.0 or 23.9 ab 29.3 an 9.5 di 5.2 hy 3.9 mt 1.6 il 0.6 Munster am Stein, Nahe Thai, Rh. • Prussia. K. Bottcher. Iv. A. Lossen, Z. D. G. G., XLIII, p. 537, 1891. Granite-por¬ phyry. S0 3 for S. Not fresh. so 3 0.12 Q 18.0 or 30.0 ab 23. 6 an 12.5 di 1.2 hy 4.1 il 0.9 hm3.8 Near Kreuznach, Rh. Prussia. K. Bottcher. K. A. Lossen, Z. D. G. G, XLIII, p. 537, 1891. Quartz-por¬ phyry. S0 3 for S. Decomposed. Q 25.0 or 26.1 ab26.2 an 10.0 C 2.2 hy 5.0 mt 2.6 Brandenberg, Mun- sterthal, Schwarz- wald, Baden. Bunsen’s Lab¬ oratory. A. Schmidt, cf N. J., 1889, I, p. 95. Porphyry. Q 32.5 or 23.4 ab 22.0 an 13.6 di 1.8 hy 3.4 mt 1.6 Pfaffenberg, Riesengebirge, Silesia. W. Herz. ' L. Milch, N. J. B. B., XII, p. 162, 1899. Granitite. so 3 0.14 Q 30.2 or 25.6 ab 20.4 an 11.1 C 0.7 hy 9.1 mt 0.7 il 0.9 Elbingerode, Harz Mountains. Fischer. K. A. Lossen, Z. D. G. G., XL, p. 203, 1888. Hypersthene- quartz- porphyrite. S0 3 for S. Li 2 0 Cu trace trace Q 30.8 or 31.7 ab 22.0 an 7.5 C 2.7 hy 4.7 mt 0. 9 Zwisenburg, Fichtelgebirge,? Bavaria. A. Bottger. F. v. Sandberger, Sb. Munch. Ak., XVIII, p. 466, 1888. Lithionite- granite. Sum high. Q 22.9 or 26.1 ab 33.5 an 8.3 C 2.7 hy 6.3 Carlsbad, Bohemia. A. Schwager. Schwager and Giimbel, Geogn. Jhft. Cassel, VII, p. 69, 1895. Granite. Given to three decimals. Q 26.9 or 30.0 ab 19.9 an 10.6 C 2.3 hy 7.9 Adalbertus Rock, Bohemia. L. Jesser? not stated. J. E. Hibsch, T. M. P. M., XV, p. 209, 1896. Granitite. I Q 13.9 or 36.7 ab 29.9 an 8.3 C 0.3 hy 8.4 Miekinia, Cracow, Galicia. R. Zuber. R. Zuber, Sb. Wien, G. R.-A., XXXV, p. 750, 1885. Quartz-por¬ phyry. 170 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS I. PERSALANE—Continued. RANG 2. DOMALKALIC. TOSCANASE—Continued. No. Si0 2 A1 2 Oj Fe 2 0 3 FeO MgO CaO Na 2 0 K 2 0 h 2 o+ h 2 o- co 2 Ti0 2 p 2 o 5 MnO BaO Sum Sp. gr. 98 72. 79 13. 77 1.69 n. d. 0. 28 1.24 3.39 4.38 2.41 99.95 2. 416 A3. Ill 1.213 .135 .011 (.022) .007 .022 .055 .047 • 99 72. 48 12. 68 2.31 n. d. 0. 73 2.39 3.30 4.35 1.31 99. 55 2. 458 A4. IV 1.208 .124 .014 (.028) .018 .043 .053 .047 100 67.99 17.54 1.17 0. 82 0. 13 1.44 4. 92 5. 78 0. 05 99. 84 A3. Ill 1.133 .172 .007 .011 .003 .026 .079 .062 101 70. 44 15.63 1.34 1.12 0.55 1.98 4. 03 5.18 0. 55 100.82 A3. Ill 1.174 .153 .008 .015 .014 .036 .064 .056 102 68. 89 14. 05 2.18 1.43 0. 83 2.15 4. 56 4.30 0. 41 0. 23 0. 03 trace 0. 58 101.00 Bl. II 1.148 .138 .014 .019 .021 .039 .073 .046 .003 — _ .004 103 64. 88 16. 43 3. 69 0.54 0.19 2. 22 3. 73 6.57 1.17 0. 49 99.91 A3. Ill 1.081 .161 .023 .007 .005 .039 .059 .070 104 65.58 15. 79 0. 94 2. 44 1.47 3. 08 2. 58 5. 67 1.16 0. 58 trace trace 100. 21 2.527 AI. I 1.093 .155 .006 .034 .037 .055 .042 .060 .007 — — 15° 105 65. 32 15.34 1.22 2.18 1.51 2. 99 2. 75 5. 70 1.97 0. 40 trace 101. 03 2.552 Bl. II 1.089 .150 .008 .030 .038 .053 .044 .061 .005 — 15° 106 65.31 16. 36 0. 68 1.68 1.06 2. 85 2. 78 5.97 1.01 0. 47 trace trace 100.31 2. 546 Al. I 1.089 .160' .004 .023 .027 .051 .045 .064 .006 — — 15° 107 64. 76 16. 48 0. 74 2. 74 1.74 3. 24 2. 67 5.49 1.62 0. 42 trace trace 100.32 2. 562 Al. I 1.079 .162 .005 .038 .044 .058 .043 .058 • .005 — 15° 108 63.15 16. 29 1. 76 2. 40 1.87 3. 61 2. 46 5. 96 2. 28 0. 30 trace trace 100. 77 2. 615 Al. I 1.053 .160 .011 .033 .049 .064 .040 .063 .004 — — 15° 109 65. 71 16. 46 0. 96 3. 04 1.09 3. 05 3. 03 5.04 1.83 trace 100. 21 A3. Ill 1.095 .161 .006 .042 .027 .054 .048 .054 — 110 64.57 16. 80 0. 97 3.02 1.69 3. 53 3. 81 4. 01 1.28 99. 68 2.542 A3. Ill 1.074 .165 .006 .042 .042 .063 .061 .043 111 74. 53 13.60 2.18 n. d. 0. 28 1.03 3. 43 4.56 0.38 99. 99 A4. IV 1.242 .133 .014 (.028) .007 .018 .055 .049 112 72. 60 15.48 1.52 n. d. 1.50 1. 71 3. 46 3.32 0. 92 99. 51 A3. Ill 1.210 .152 .009 (.018) .038 .030 .056 .035 113 75. 76 14. 36 0. 86 ii. d. 0.12 1.20 4. 02 3.82 0. 37 100.51 A3. Ill 1.263 .141 .005 (.010) .003 .021 .064 .040 114 73. 20 13. 40 1.76 n. d. 0.10 1.46 3.17 4. 70 2. 77 100. 56 A3. Ill 1.220 .131 .011 (.022) .003 .027 .051 .050 PERSALANE-TOSCANOSE. 171 ORDER 4. QUARDOFELIC. BRITANNARE—Continued. SUBRANG 3. SODIPOTASSIC. TOSCANOSE—Continued. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. Q 31.7 or 26.1 ab 29.2 an 6.1 C 1.1 hy 3.6 Hlinik, Hungary. A. Lagorio. A. Lagorio, T. M. P. M., VIII, p. 444, 1887. Obsidian. Q 29.7 or 26.1 ab 27.8 an 6.7 ' di 4.6 hy 3.2 Apate, Schemnitz, Hungary. A. Lagorio. A. Lagorio, T. M. P. M., VIII, p. 448, 1887. Liparite. Q 13.7 or 34.5 ab 41.4 an 7.2 C 0.5 hy 0.8 mt 1.6 Halasag, Ditro, Siebenburgen, Hungary. J. v. Szadeczky. J. v. Szadeczky, Sb. Sieb. Mus. Ver., XXI, 1900, cf. N. J., 1901, I, p. 402. Quartz-nord- markite. Q, 21.8 or 31.1 ab 33.5 an 9.2 di 0.8 hy 1.9 mt 1.9 Topla, S. Carinthia, Austria. H. V. Graber. H. V. Graber, Jb.Wien, G. R.-A., XLVII, p. 278, 1897. Granite. ZrOo b 2 o 3 S0 3 Cl F FeSo Cu Pb trace 0.38 0.30 0.07 0.02 0.49 0.03 0.04 Q 21.0 or 25.6 ab 38. 3 an 5.3 di 4.5 hy 0.6 mt 3.2 Platta Cotschna, Bundner Oberland, Switzerland. J. R. Hanhart. A. Bodmer-Beder, N. J. B. B., XI, p. 239, 1897. Quartz-biotite- porphyry. Q 13.9 or 38.9 ab 30.9 an 8.9 di 1.3 mt 1.6 hm 2.6 Kaserngrat, Wind- galle Mountains, Switzerland. C. Schmidt. C. Schmidt, N. J. B. B., IV, p. 432, 1886. Porphyry. X S0 3 Cl LioO 0.73 0.19 trace trace Q 18.6 or 33.4 ab 22.0 an 14.7 hy 7.4 mt 1.4 il 1.1 Vivo, Mte. Amiata, Tuscany. J. F. Williams. J. F. Williams, N. J. B. B., V, p. 408, 1887. Trachyte. Dried at 100°. X so 3 Cl Li 2 0 0.57 0.03 0.05 trace Q 18.4 or 33.9 ab 23.1 an 12.5 di 1.9 hy 5.1 mt 1.9 il 0.8 Above Casa Tasso, Mte. Amiata, Tus¬ can y. J. F. Williams. J. F. Williams, N. J. B. B., V, p. 411, 1887. Trachyte. Dried at 100°. X so 3 Cl FeS 2 LioO 0.85 none trace 1.29 trace Q 17.2 or 35.6 ab 23.6 an 14.2 hy 5.3 mt 0.9 il 0.9 pr 1.3 Fosso del Prato, Mte. Amiata, Tuscany. J. F. Williams. J. F. Williams, N. J. B. B., V, p. 410, 1887. Trachyte. Dried at 100°. X so 3 Cl Li 2 0 0.33 0.08 0.01 trace Q 17.1 or 32.2 ab 22.5 an 16.1 C 0.3 hy 8.1 mt 1.2 il 0.8 Poggio Traburzolo, Mte. Amiata, Tus¬ cany. J. F. Williams. J. F. Williams, N. J. B. B., V, p. 412, 1887. Trachyte. Dried at 100°. X SO3 Cl LioO 0.47 0.11 0.11 trace Q 14.8 or 35.0 ab 15.8 an 15.8 di 1.5 hy 6.5 mt 2.6 il 0.6 La Crocina, Mte. Amiata, Tuscany. J. F. Williams. J. F. Williams, N. J. B. B., V, p. 413, 1887. Trachyte. Dried at 100°. Q 18.7 or 30.0 ab 25.2 an 15.0 C 0.5 hy 7.5 mt 1.4 Mte. Amiata, Tus¬ cany. L. Ricciardi. L. Ricciardi, Gaz. Chem. Ital., XVIII, 1888. Trachyte. Q 14.8 or 23.9 ab 32.0 an 17.0 di 0.4 hy 8.8 mt.1.4 Mte. San Vito, Brac- ciano, Italy. H. S. Washing¬ ton. H. S. Washington, J. G., V, p. 362, 1897. Toscanite. Dried at 110°. Q 32.8 or 27.2 ab 28.8 an 5.0 C 1.1 hy 4.4 Cannetello, Lipari, Aeolian Islands. F. Glaser. A. Bergeat, Abh. Miinch. Ak., XX, p. 118, 1899. Obsidian Q 32.9 or 19.5 ab 29.3 an 8.3 C 3.2 hy 6.2 N. of Kamary, n. Bal- aklava, Crimea. Lagorio. A. Lagorio, Guide Exc. 7, Cong. Int, XXXIII, p. 27, 1897. Biotite-granite. Q 35.0 or 22.2 ab 33.5 an 5.8 C 1.6 hy 1.6 Sidi Zerzor, Algeria. Duparc and Pearce. Duparc, Pearce, and Mrazec, M. Soc. Ph. Genev., XXXIII, p. 115, 1900. Liparite. Q 32.1 or 27.8 ab 26.7 an 7.5 C 0.3 hy 3.2 Cape Marsa, n. Men- erville, Algeria. Duparc and Pearce. Duparc, Pearce, and Ritter, M. Soc. Ph. Genev., XXXIII, p. 77, 1900. Liparite. 172 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS I. PERSALANE—Continued. RANG 2. DOMALKALIC. TOSCANASE—Continued. No. Si0 2 A1.A FeA FeO MgO CaO Na 2 0 k 2 o h 2 o+ h 2 o- C0. 2 Ti0 2 PA MnO BaO Sum Sp. gr. 115 72. 74 12. 70 1.91 n. d. 0. 15 1. 59 3.60 4.10 2. 92 99.71 A3. Ill 1.212 . 124 .012 (.024) .004 .029 .058 .043 116 73. 05 14.67 0. 89 n. d. 0. 26 0. 97 3.99 5.11 0.91 99. 85 2. 211 A3. Ill 1.218 .144 .006 (.012) .007 .018 .064 . 055 21° 117 67. 03 14. 25 1.96 1. 70 trace 1.05 3. 85 3. 90 5. 73 trace 99. 47 2. 376 A3. Ill 1.117 .140 .013 .024 — .019 .062 .041 — 118 73. 38 13. 67 0.30 n. d. 0.09 1.18 2.99 6.47 n. d. 0.02 0.17 trace 99. 33 A2. II ' 1.223 .134 .002 (.004) .002 .021 .048 .069 — .001 — 119 72. 88 14.62 0. 43 1.69 0.35 1.51 3. 68 4.05 0. 65 0. 06 .009 100.01 A3. Ill 1.215 .141 .003 .024 .009 .027 .059 .043 — .001 120 72. 96 14 57 n. d. 1.62 0. 52 1.47 4.59 4. 26 0.37 0.07 trace 100.43 A3. Ill 1.216 .143 — .022 .013 .027 .074 .046 .001 — 121 71. 25 14.21 0. 85 0. 43 0. 89 2. 72 3. 11 6. 74 0. 48 100.68 A3. Ill 1.188 .139 .005 .005 .022 .048 .050 .071 122 76. 48 13. 94 trace none 0. 01 1.08 3. 70 4.90 0. 86 0.15 101.12 2. 611 B2. Ill 1.275 . 136 — — — .020 .060 .053 RANG 2 . DOMALKALIC. TOSCANASE. 1 64. 83 15.02 5. 57 0. 94 1.47 2. 62 3. 93 2. 36 1. 76 0.55 0. 67 0. 29 100.02 A2. II 1.081 .147 .035 .013 .037 .047 .063 .025 .008 .004 2 73. 27 15.51 0. 33 1.14 0.15 2. 74 4. 79 1. 66 0. 68 . 0.10 trace trace 100. 37 A2. 11 1.221 .152 .002 .016 .004 .049 .077 .018 .001 — — 3 70. 64 15.34 1.83 1.10 0. 52 1.24 5. 23 3. 55 0.38 0.14 0. 90 trace 100. 87 2. 632 B2. Ill 1.177 .150 .011 .014 .013 .022 .084 .038 .011 -_ 12.5° 4 69. 70 18. 72 0.65 0. 79 0.45 2. 25 5.01 1.68 0. 71 99. 96 A3. Ill 1.162 .183 .004 .011 .011 .040 .080 .018 5 67. 42 15. 88 1.37 1.14 1.43 3. 49 6. 42 2. 65 0. 05 0. 07 99.92 A3. Ill 1.124 .155 .009 .016 .036 .062 .103 .030 .001 6 66.84 18. 22 2. 27 0. 20 0.81 3. 31 5.14 2. 80 0. 46 trace 100.05 A3. Ill 1.114 .178 .014 .003 .020 .059 .083 .030 — 7 69. 93 14.95 1.78 0. 55 0. 60 1.46 5.30 3.99 0. 32 0.12 0.33 0.33 trace 0.29 100. 01 Al. I 1.166 .147 .011 .008 .015 .022 .085 .042 .004 .002 .002 8 66. 28 16.21 0. 80 2 . ob 1.57 3.53 4. 36 3. 20 0. 78 0.12 0. 50 0. 20 trace 0.34 100.00 Al. 1 1.105 .159 .005 .029 .049 .063 .070 .035 .006 .001 — .002 9 65. 87 16. 82 1.58 1.23 1.54 2. 65 4. 72 3.15 1.43 0. 37 trace 99. 36 2. 62 B2. Ill 1.098 . 165 .010 .017 .039 .047 .076 .034 .004 — PERSALANE-LASSENOSE. 173 ORDER 4. QUARDOFELIC. BRITANNARE—Continued. SUBHANG 3. SODIPOTASSIC. TOSCANOSE—Continued. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. Q 31.6 or 23.9 ab 30.4 an 6.4 di 1.4 hy 2.9 Cape Marsa, n. Men- erville, Algeria. Duparc and Pearce. Duparc, Pearce, and Ritter, M. Soc. Ph. Genev., XXXIII, p. 77, 1900. Liparite. Q 26.9 or 30.1 ab 33.5 an 5.0 C 0.7 hy 2.3 Teneriffe, Canary Is¬ lands. A. Lagorio. A. Lagorio, T. M. P. M., VIII, p. 440, 1887, Obsidian. Q 27.0 or 22.8 ab 32.5 an 5.3 C 1.8 hy 1.5 mt 3.0 Ainba Barra, Abys¬ sinia. G. T. Prior. G. T. Prior, Min. Mag., XII, p. 270, 1900. Pitchstone. Zr0 2 trace FeS., 0.94 CuS' 0.06 PbS 0.06 Q 28.9 or 38. 4 ab 25.2 an 4.7 hy 0.8 ap 0.4 pr 0.9 Adadle, Somali Pen¬ insula, East Africa. Not stated. J. R. Hanhart? A. Bodmer-Beder, cf. N. J., 1895, I, p. 318. Granite. Q 31.1 or 23.9 ab 30. 9 an 7.5 C 1.2 hy 3.7 mt 0.7 Konyam Bay, Siberia. Lind strom. Tornebohm, cf. N. J., 1885, I, p. 430. Biotite-granite. Q 24.7 or 25. 6 ab 38.8 an 6.4 di 1.0 hy 3.7 Konyam Bay, Siberia. Lindstrom. Tornebohm, cf. N. J., 1885, I, p. 430. Biotite-granite. Q 22.4 or 39.4 ab 26.2 an 5.0 di 4.8 wo 1.0 mt 1.3 Lan Biang, Battak Plateau, Sumatra. W. Herz. L. Milch, Z. D. G. G., LI, p. 69, 1899. Liparite. Q 33.4 or 29.5 ab 31.4 an 5.6 Orr’s Gully, Dargo, Victoria, Australia. A. W. Howitt. A. W. Howitt, Tr. R. Soc. Viet., 1887. cf. N. J., 1889, I, 121. Aplite. Sum high. SUBRANG 4. DOSODIC. LASSENOSE. Q, 25.3 or 13.9 ab 33.0 an 13.1 C 1.2 hy 3.7 mt 1.2 il 1.2 hm.4.8 Titus’ Mill, Upham, New Brunswick. W. D. Matthew. W. D. Matthew, Tr. N. Ab Ac. Sc., XIV, p. 207, 1895. Granite. Mean of two. Q 32.1 or 10.0 ab 40.3 an 13.6 C 0.8 hy 2.3 mt 0.5 Moore’s quarry, Florence, Massa¬ chusetts. L. G. Eakins. B. K. Emerson, M. U.S. G. S., XXIX, p. 316, 1898. Granite. Q 23.3 or 21.1 ab 44.0 an 6.1 C 0.6 hy 1.3 mt 0.7 il 1.7 hm 1.3 Marblehead Neck, Essex County, Massachusetts. H. S. Washing¬ ton. H. S. Washington, .T. G., VII, p. 292, 1899. Rhyolite. Q 28.6 or 10.0 ab 41.9 anil. 1 C 4.8 hy 2.0 mt 0.9 Kawishiwi River, Minnesota. A. D. ivieeds. U. S. Grant, 21 A. R. G. Nh. S. Minn., p. 43, 1893. Quartz- porphyry. Q 11.9 or 16.7 ab 54.0 an 6.2 di 9.2 mt 2.1 Kekequabic Lake, Minnesota. Dodge and Sidener. U. S. Grant, 21 A. R. G. Nh. S. Minn., p. 41, 1893. Augite-granite. Also in A. G., XI, p. 385, 1893. Q 17.9 or 16.7 ab 43.5 an 16.4 C 0.6 hy 2.0 mt 0.7 hm 1.8 Kekequabic Lake, Minnesota. Dodge and Sidener. U. S. Grafnt, 21 A. R, G. Nh. S. Minn., p. 41, 1893. Augite-granite. Also in A. G., XI, p. 385, 1893. SrO 0.06 Li«0 trace Q 20.9 or 23.4 ab 44.3 an 5.6 hy 1.5 mt 0.9 il 0.6 hm 0.5 North part of Crazy Mountains, Mon¬ tana. W. F. Hille- brand. J. E. Wolff, B. U. S. G. S. 148, p. 142, 1897. Granite- porphyry. SrO 0.05 LioO trace Q. 17.5 or 19.5 ab 36.7 an 15.0 di 2.0 hy 6.3 mt 1.2 il 0.9 Sweet Grass Creek, Crazy Mountains, Montana. W. F. Hille- brand. J. E. Wolff, B. U. S. G. S. 148, p. 142, 1897. Porphyrite. Q 18.0 or 18.9 ab39.8 an 13.1 C 0.8 hy 4.5 mt 2.3 il 0.6 Castle, Castle Moun¬ tains, Montana. L. V. Pirsson. Weed and Pirsson, B. U. S. G. S. 139, p. 106, 1896. Porphyry. 174 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS I. PERSALANE—Continued. RANG 2. DOMALKALIC. TOSCANASE—Continued. No. Si0 2 A1A Fe 2 0 3 FeO MgO CaO Na 2 0 k 2 0 h 2 o+ H 2 0- co 2 Ti0 2 PA MnO BaO Sum Sp. gr. 10 62.58 16. 42 2. 46 1.96 1.84 2. 47 4.57 3.91 1.40 0. 38 0. 77 0. 40 0. 33 0. 08 0.41 100. 08 Al. I 1.043 .161 .015 .028 .046 .045 .073 .041 .005 .002 .001 .003 11 67. 55 15. 68 0. 98 1.02 1. 11 2.51 4.15 2. 86 2. 76 0.38 none 0. 34 0.12 trace 0.11 99.65 Al. I 1.126 . 153 .006 .014 .028 .045 .062 .030 .004 .001 — .001 12 69. 56 15. 29 0. 86 2. 06 0. 69 2.81 3.97 3.36 0. 86 0.55 0.16 100.17 A2. II 1.159 .150 .005 .029 .017 .050 .064 .036 .007 .001 13 75. 50 13. 25 1.02 0.91 0. 07 0. 90 4. 76 2. 85 0. 41 none none none 100.05 A2. II 1.258 .130 .006 .012 .002 .016 .077 .031 — — -— 14 72. 59 13.47 1.58 1.32 1. 05 2.12 4. 63 2. 52 0. 18 0. 52 none 100. 24 A2. II 1.205 .132 .010 .018 .026 .038 .074 .026 .006 — 15 70.52 15. 85 2. 28 0. 36 0. 09 2.59 3. 93 3.43 0.35 trace 0.17 0.09 99. 95 A2. II 1.175 .155 .014 .005 .002 .047 .063 .036 — .001 .001 16 70*. 24 17.36 1.38 0. 79 0.53 2. 74 3. 69 2. 65 0.71 none trace trace none 100.09 A2. II 1.171 .170 .009 .011 .013 .049 .059 . Q29 — — — 17 69. 24 15. 30 1.72 0. 69 0. 95 2. 98 4.46 2. 52 1.30 0. 65 trace trace 100. 08 A2. II 1.164 .150 .011 .010 .024 .053 .072 .027 .008 — — 18 67. 95 14. 98 2.33 0. 95 1.42 3. 98 4.39 2. 86 0. 61 0. 45 0. 45 0. 07 0.09 0. 23 . 100.79 Al. I 1.133 .147 .015 .013 .036 .071 .071 .030 .006 .001 .001 .002 19 67. 49 16.18 1.30 1.22 1.34 2.68 4. 37 2. 40 2. 69 0.13 0.13 0. 08 100. 01 A2. 11 1.125 .159 .008 .017 .034 .048 .070 .026 .002 .001 .001 20 66. 64 16. 22 1.84 1.06 1.25 2.41 5.11 3. 86 0. 55 0. 52 none 0. 29 0.16 trace 0.27 100.34 Al. I 1.111 .159 .012 .015 .031 .043 .082 .041 .004 .001 — .002 21 65. 64 17. 29 3.07 1.29 1.78 1.98 5. 77 2. 44 1.03 0.17 none 0. 23 trace 100.73 A2. II 1.094 .170 .019 .018 .045 .036 .093 .026 — .002 — 22 64. 65 17. 80 2.33 2.10 0. 81 1.73 4.18 2. 83 3.06 trace trace trace 100.09 A2. II 1.078 .174 .014 .030 .020 .030 .•068 .030 — — — 23 67. 78 16. 67 1.99 0.51 0. 71 2. 67 4.91 3. 43 1.44 0.19 trace 100. 30 A2. II 1.130 .163 .013 .007 .018 .048 .079 .036 .001 — 24 66.45 15. 84 2. 59 1.43 1.21 2.90 3. 92 2.89 0. 84 1.35 0.10 0. 36 0. 09 none 100.09 2. 670 Al. I 1.108 .155 .016 .020 .030 .051 .063 .031 « .001 .002 .001 16° 25 63. 02 17. 61 1.78 2. 76 1.63 3. 30 4. 72 3. 23 2. 03 0.16 trace 0.08 100. 32 2. 689 A2. II 1.050 .173 .011 .039 .041 .059 .076 .034 .001 — .001 16.5° 26 ’ 67. 49 17. 76 2.54 0. 08 0. 35 1.67 5. 03 4. 40 0. 52 trace trace 99. 84 A3. Ill 1.125 .174 .015 .001 .009 .030 .080 .047 — — PERSALANE-LASSENOSE. 175 ORDER 4. QUARDOFELIC. BRITANNARE—Continued. SUBRANG 4. DOSODIC. LASSENOSE—Continued. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. SrO Li 2 0 0.10 trace Q 12.9 or 22.8 ab 38.3 an 12.5 C 0.2 hy 5.6 nit 3.5 il 0.8 Near Yogo Peak, Lit¬ tle Belt Mountains, Montana. W. F. Hille- brand. L. Y. Pirsson, 20 A. R. U. S. G. S., III, p. 514, 1900. Syenite-por¬ phyry. Cl SrO Li..O 0.05 0.03 trace Q 27.1 or 16.7 ab 32.5 an 12.5 C 1.6 hy 3.3 mt 1.4 il 0.6 Butte, Montana. % H. N. Stokes. Weed and Tower, B. U. S. G. S. 168, p. 119, 1900. Rhyolite-dacite- obsidian. NoZr0 2 or S0 3 . Q 25.5 or 20.0 ab 33.5 an-13.9 hy 3.9 mt 1.2 il 1.1 Schafer Butte, Boise County, Idaho. G. Steiger. W. Lindgren, 20A.R.U.S. G. S.,111, p. 81, 1900. Granite. S0 3 LioO 0.32 0.06 Q 34.2 or 17.2 ab 40.3 an 4.4 C 0.6 hy 1.1 mt 1.4 Obsidian Cliff, Yel¬ lowstone National Park. J. E. Whitfield. J. P. Iddings, B. U. S. G. S. 150, p. 160, 1898. Rhyolite. S0 3 for S? Near kaller- udose. FeS 2 0.26 Q 30.4 or 14.5 ab 38.8 an 8.9 di 1.4 hy 2.2 mt 2.3 il 0.9 East of Willow Park, Yellowstone Na¬ tional Park. , J. E. Whitfield. J. P. Iddings, M.U.S. G.S., XXXII, p. 426, 1899. Obsidian. S0 3 LioO 0.29 trace Q 29.1 .or 20.0 ’ab 33.0 an 13.1 hy 0.2 nit 1.2 hml. 4 Bunsen Peak, Yellow¬ stone National Park. J. E. Whitfield. J. P. Iddings, M.U.S. G.S., XXXII, p. 87, 1899. Mica-dacite- porphyry. S0 3 for S? so 3 Cl LioO trace none none Q. 31.9 or 16.1 ab 30.9 an 13.6 C 3.4 hy 1.3 mt 2.3 Birch Hills, Yellow¬ stone National Park. J. E. Whitfield. J. P. Iddings, M.U. S. G. S., XXXII, p. 163, 1899. Mica-dacite- porphyry. so 3 Cl Li 2 0 0.27 trace none Q 26.6 or 15.0 ab 37.7 an 14.2 hy 2. 4 mt 0.5 il 1.2 hml. 4 Electric Peak, Yel¬ lowstone National Park. J. E. Whitfield. J. P. Iddings, 12 A. R. U. S. G. S., p. 627, 1891. Quartz-mica- diorite-por- phyrite. S0 3 for S? so 3 SrO 0.11 trace? Q 22.4 or 16.7 ab 37.2 an 11.8 di 5.4 hy 1.1 mt 1.9 il 0.8 hml. 1 Sepulchre Mountain, Yellowstone Na¬ tional Park. • T. M. Chatard. J. P. Iddings, M.U. S. G. S., XXXII, p. 272, 1899. Andesite- breccia. Breccia. S0 3 for S? » Q 24.6 or 14.5 ab 36.7 an 13.3 C 1.5 hy 4.6 mt 2.0 Sepulchre Mountain, Yellowstone Na¬ tional Park. L. G. Eakins. J. P. Iddings, 12 A. R. U. S. G. S., p. 648, 1891. Dacite. ZrOo S Cr,.0 :! V 2 0 3 SrO 0.01 trace trace 0.01 0.14 Q 15.6 or' 22.8 ab 43.0 an 10.0 di 1.6 hy 2.7 mt 2.8 il 0.5 Sulphur Creek Basin, Yellowstone Na¬ tional Park. W. F. Hille- brand. Hague and Jaggar, B. U. S. G. S 168, p. 95, 1900. Syenite-por¬ phyry. No NiO. so 3 Cl trace trace Q 15.8 or 14.5 ab 48.7 an 10.0 C 1.5 hy 4.5 mt 4.4 Gray Peak, Yellow¬ stone National Park. J. E. Whitfield. J. P. Iddings, M.U.S. G. S., XXXII, p. 81, 1899. Andesite-por¬ phyry. S0 3 LioO 0.43 0.17 Q 23.6 or 16.7 ab 35.6 an 8.3 C 4.7 hy 4.2 mt 3.2 Elk Creek, Yellow¬ stone National Park. J. E. Whitfield. J. P. Iddings, M.U. S.G.S.,XXXII, p. 325, 1899. Trachytic rhy¬ olite. Q 19.0 or 20.0 ab 41.4 an 13.3 C 1.0 hy 1.9 mt 2.5 Garfield Peak, Wyo¬ ming. L. G. Eakins. W. Cross, B. U. S. G. S. 148, p. 116, 1897. Dacite? Cl SrO LioO 0.05 0.07 trace Q 24.5 or 17.2 ab 33.0 an 14.2 C 1.0 hy 3.5 mt 3.7 Mount Lincoln, Leadville, Colo¬ rado. W. F. Hille- brand. W. Cross, M. U. S. G. S., XII, p. 332, 1886. Porphyry. Q 12.2 or 18.9 ab 39.8 an 16.4 C 0.4 hy 7.7 mt 2.6 McNulty Gulch, Leadville, Colo¬ rado. L. G. Eakins. W. Cross, B. U. S. G. S. 148, p. 176, 1897. Diorite-por- phyry. Not fresh. Nearlaurvikose. Q 17.6 or 26.1 ab 41.9 an 8.3 C 1.7 hy 0.9 hm2.6 Rosita Hills, Colo¬ rado. L. G. Eakins. W. Cross, 17 A. R.U. S. G. S.,II, p. 324, 1896. Mica-dacite. 176 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS I. PERSALANE—Continued. RANG 2. DOMALKALIC. TOSCANASE—Continued. No. Si0 2 A1A Fe 2 0 3 FeO MgO CaO Na 2 0 k. 2 o H 2 0+ II 2 0- C0 2 Ti0 2 PA MnO BaO Sum Sp. gr. 27 66. 46 17.91 2. 42 0. 35 0. 49 2. 89 4. 79 3. 74 1.01 trace 100. 06 A3. Ill 1.108 . 175 .015 .005 .012 .051 .077 .039 — 28 68. 30 16. 24 1.60 1.63 1.05 2. 79 3.90 3.52 0.71 n. d. 0.13 0.12 trace 100. 03 A2. II 1.138 .159 .010 .022 .026 .050 .063 .037 — .001 .002 — 29 65.71 18. 30 1.19 1.53 0. 98 2.17 5.00 3.95 1.39 0. 02 100.24 A3. Ill 1.095 .179 .007 .021 .025 .039 .080 .042 30 62. 65 16. 68 2. 35 2. 63 1.43 4.96 4. 45 2. 75 0. 66 0.27 0. 42 0. 28 0.16 0. 13 99. 93 Al. I 1.044 .163 .015 .036 .036 .088 .072 .030 .005 .002 .002 .001 31 65. 78 17.32 3. 68 0. 46 0. 47 1. 66 5. 23 4. 64 0.14 0. 27 0.13 0. 32 100.10 A2. II 1.096 .170 .023 .007 .012 .030 .084 .049 .003 .001 .005 32 64. 82 18. 27 3.48 0.56 0. 85 2. 89 5.05 2. 67 0. 20 0. 56 0. 23 0. 20 99. 78 A2. II 1.080 .179 .022 .008 .021 .052 .081 .028 .007 .002 .003 33 67.01 17.91 1.30 n. d. 0. 42 1.86 5.33 4. 56 0. 48 0.16 none 0.10 trace trace 0. 60 99. 86 A2. II 1.117 .176 .008 (.016) .011 .033 .085 .049 .001 — .004 34 71.87 14. 53 1. 28 1.02 0. 48 1.59 5.08 2. 84 0. 22 0.06 none 0.41 0.10 trace 0. 08 99. 63 Al. I 1.198 .142 .008 .014 .012 .029 .082 .030 .005 .001 — .001 35 70. 77 14.83 1.35 1.25 0.64 2. 12 5. 07 2. 68 0. 33 0. 07 none 0. 38 0.13 trace 0. 08 99. 88 Al. I 1.176 .145 .009 .018 .016 .038 .082 .029 .005 .001 — .001 36 70.10 15.18 1.78 1.09 0. 74 2. 27 5.15 2. 58 0.19 0.10 none 0. 48 0.13 trace 0. 08 99.97 Al. I 1.168 .149 .011 .015 .019 .041 .083 .027 .006 .001 — .001 37 68.17 15. 60 2.31 0. 94 1.02 2. 76 5.15 2.46 0.45 0. 09 none 0. 54 0.13 trace 0. 06 99. 71 Al. I 1.136 .153 .014 .013 .026 .049 .083 .026 .007 .001 — — 38 69. 36 16. 23 0. 88 1.53 1.34 3.17 4. 06 3.02 0. 45 100. 04 A3. Ill 1.156 .159 .005 .021 .034 .057 .065 .032 39 68. 72 15.15 1.16 1.76 1.28 3. 30 4. 26 2. 78 0. 74 0. 31 0. 09 0.11 0. 07 99. 76 Al. I 1.145 .148 .007 .025 .032 .059 .069 .030 .004 .001 .002 — 40 68. 32 15. 26 1.66 1.26 1.32 3.26 4.27 2. 81 1.37 0. 31 0.12 0.04 0.07 100. 07 Al. I 1.139 .150 .010 .018 .033 .058 .069 .030 .004 .001 — — 41 69. 51 15. 75 3.34 n. d. 2. 09 1.71 3. 89 3.34 0. 56 trace 100.19 A4. IV 1.159 .154 .021 (.042) .052 .030 .063 .036 — 42 68. 10 15. 50 3. 20 none 0. 10 3. 02 4. 20 3.13 2. 72 0.15 0. 03 trace 0. 06 100. 21 Al. I 1.135 .152 .020 — .003 .053 .068 .033 .002 — — 43 67.89 17.29 2. 39 0. 21 0. 66 3. 01 5.11 1.69 1.34 0. 21 0.12 0.12 0. 03 100.11 Al. I 1.132 .169 .015 .003 .017 .053 .082 .018 .003 .001 .002 PEItSALANE-LASSEN! >SE. 177 ORDER 4. QUARDOFELIC. BRIT ANNARE—Continued. SUBRANG 4. DOSODIC. LASSENOSE—Continued. Inclusive. Norm. • Locality. Analyst. Reference. Author’s name. Remarks. Q 17.9 or 21.7 ab 40.3 an 14.2 C 0.8 hy 1.2 mt 1.2 hml. 6 Bald Mountain, Rosita, Colorado. L. G. Eakins. AV. Cross, 17 A.R.U.S. G. S., II, p. 324, 1896. Dacite. SrO LioO 0.04 trace Q 24.0 or 20.6 ab 33.0 an 13.9 C 0.9 hy 4.3 mt 2.3 Chicago Mountain, Tenmile District, Colorado. W. F. Hille- brand. AV. Cross, 14 A. R, U. S. G. S., p. 227, 1894. Quartz-porphy- rite. Q 14.8 or 23.4 ab 41.9 an 10.8 C 1.8 hy 4.3 mt 1.6 • Crested Butte, West Elk Mountains, Colorado. L. G. Eakins. AV. Cross, 14 A. R. U. S. G. S., p. 227, 1894. Quartz-porphy- rite. SrO Li»0 0.11 trace Q 13.9 or 16.7 ab 37.7 an 17.0 di 5.4 hy 2.6 mt 3.5 il 0.8 Hermano Peak, Sierra El Late, Colorado. W. F. Ilille- brand. AA T . Cross, 14 A. R. U. S. G. S., p. 227, 1894. Hornblende- porphyrite. Near yellow- stonose and subrang 4 of adamellase. • Q 13.6 or 27.2 ab 44.0 an 8.3 C 0.7' hy 1.2 mt 0 .9 il 0.5 hm3.0 San Mateo Mountain, Mount Taylor re¬ gion, New Mexico. T. M. Chatard. J. S. Diller, B. U. S. G. S. 148, p. 185, 1897. Mica-andesite. Q 18.0 or 15.6 ab 42.4 an 14.5 C 2.0 hy 2.2 il 1.1 hm3.5 San Francisco Moun¬ tains, Arizona. T. M. Chatard. B. U. S. G. S. 148, p. 188, 1897. Hypersthene- andesite. Not described. SrO LioO 0.13 none Q 13.2 or 27.2 ab 44.5 an 9.2 C 0.9 hy 3.2 Fortvmile Creek, n. Canyon Creek, Alaska. H. N. Stokes. J. E. Spun - , A. G., XX\ r , p. 231, 1900. Alaskite-por- phyry. WON o o 0.04 trace 0.03 Q 27.4 or 16.7 ab 43.0 an 8.1 hy 1.2 mt 1.4 il 0.8 Below Liao Rock, Crater Lake, Oregon. H. N. Stokes. IL B. Patton, B. U. S. G. S. 168, p. 222, 1900. Rhyolite. No S0 3 , S, Cr,0 3 or NiO. gGE? o o 0.05 0.11 0.02 Q 25.1 or 16.1 ab 43.0 an 9.5 di 1.3 hy 1.6 mt 2.1 il 0.8 Liao Rock Flow, Crater Lake, Oregon. H. N. Stokes. H. B. Patton, B. U. S. G. S. 168, p. 222, 1900. Rhyolite. No S0 3 , S, Cr.,Os or NiO. COON *-S ^-*1 o o IS 0.04 0.03 0.03 Q 24.7 or 15.0 ab 43.5 an 10.8 hy 1.0 mt 2.6 il 0.6 Cleetwood Cove, Crater Lake, Oregon. H. N. Stokes. H. B. Patton, B. U. S. G. S. 168, p. 222, 1900. Rhyolite. No S0 3 , S, Ci\,0 3 or NiO. Cl SrO trace 0.03 Q 21.8 or 14.6 ab 43.5 an 12.2 di 1.1 hy 2.1 mt 1.1 il 1.4 hm 1.1 Near Wine Glass Grotto, Crater Lake, Oregon. H. N. Stokes. H. B. Patton, B. U. S. G. S. 168, p. 222, 1900. Rhyolite. No Zr0 2 , S0 3 , S, Cr 2 0 3 or NiO Q 24.6 or 17.8 ab 34.1 an 15.8 C 0.5 hy 5.5 mt 1.2 Four miles northwest of Lassen’s Peak, California. J. AV. Shimer. Hague and Iddings, A. J. S., XXVI, p. 232, 1883. Dacite. SrO Li 2 0 0.03 trace Q 23.8 or 16.7 ab 36.2 an 13.6 di 2.3 hv 4.0 mt 1.6 il 0.6 East end of Chaos, Lassen’s Peak, California. A\ T . F. Hille- brand. J. S. Diller, B. U. S. G. S. 150, p. 218, 1898. Dacite. Dried at 100°. SrO Li«0 trace trace Q 23.9 or 16.7 ab36.2 an 14.2 di 1.6 hy 3.1 mt 2.3 il 0.6 West base of Lassen’s Peak, California. W. F. Hille- brand. J. S. Diller, B. U. S. G. S. 150, p. 218, 1898. Dacite. Dried at 100°. ~ Q 25.0 or 19.5 ab 33.0 an 8.3 C 2.7 hyl0.7 Southeast base of Lassen’s Peak, California. T. M. Chatard. J. S. Diller, B. U. S. G. S. 150, p. 218, 1898. Dacite. SrO LioO trace none Q 25.4 or 18.3 ab35.6 an 14.2 hy 0.7 hm 3.2 tn 0.4 Bear Creek Falls, Shasta County, California. R. B. Riggs. J. S. Diller, B. U. S. G. S. 150, p. 215, 1898. Dacite. Dried at 105°. SrO 0.04 Q 24.5 or 10.0 ab 43.0 an 14.7 C 1.6 hy 1.7 il 0.4 hm2.4 Near Buntingville, Lassen County, California. T. M. Chatard. J. S. Diller, B. U. S. G. S. 148, p. 195, 1897. Hornblende- andesite. Dried at 105°. 14128—No. 14—03 12 178 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS I. PERSALANE—Continued. RANG 2. DOMALKALIC. TOSCANASE—Continued. No. Si0 2 A1A Fe 2 0 3 FeO MgO CaO Na 2 0 k 2 o H 2 04- h 2 o- o o TiO, p 2 o 5 MnO BaO Sum Sp. gr. 44 66. 30 17. 55 2.19 0. 55 0. 97 3.12 5.15 2.45 1.25 trace 0.15 trace 99.96 A2. II 1.105 .173 .014 .008 .024 .055 .083 .026 — .001 — 45 70. 36 15. 47 0. 98 1.17 0. 87 3.18 4. 91 1.71 1.00 0. 06 0. 20 0.11 trace 0. 06 100. 08 Al. I 1.173 .152 .007 .017 .022 .057 .079 .018 .003 .001 — — 46 O o CO 1^- 16. 38 none 0. 99 0.48 2. 42 4. 53 1.87 0. 52 100.19 A3. Ill 1.216 .161 — .011 .012 .043 .072 .020 47 71.19 13.81 1.45 1.68 0. 74 2. 87 4. 24 1.82 0. 92 0.15 0. 82 0. 35 0.08 0. 07 0.16 100. 35 Al. I 1.187 .135 .009 .024 .019 .051 .068 .019 .004 .001 • .001 .001 48 68. 65 16. 34 0. 93 1.48 1.29 3. 07 4. 85 1.85 0. 62 0. 24 0. 28 0.15 0. 08 0.09 99. 99 Al. I 1.144 . 161 .006 .020 .032 .055 .078 .020 .004 .001 .001 .001 49 73.18 13. 66 0 . 21 2. 24 0. 93 2.10 3. 70 2. 72 0. 57 0 . 10 0. 17 0. 25 0. 09 0. 07 0.10 100.09 ai. i 1.220 .131 .001 .031 .023 .038 .059 .029 .003 .001 .001 .001 50 71.88 15. 57 1.07 0. 30 0. 68 2.03 5. 81 1.80 0. 68 0 . 11 none 0.17 0 . 08 none 0. 02 100. 28 Al. I 1.198 .153 .007 .004 .017 .036 .093 .019 .002 .001 — — 51 66. 28 16. 03 1.80 1.88 1.12 3. 75 4. 10 3. 49 0. 39 0 . 10 0.54 0. 30 0. 05 0. 08 99.91 Al. I 1.101 .157 .011 .027 .028 .067 .066 .037 .007 .002 .001 .001 52 70.09 15.13 1.72 1.13 1.22 2. 61 3. 61 2. 75 0. 78 trace 0. 67 0 . 11 0. 08 none 99. 98 - Al. I 1.168 .118 .004 .015 .031 .047 .058 .030 .008 .001 .001 — 53 69. 56 15. 65 1.24 0.91 0. 82 2.52 4. 09 2.19 2. 92 0.13 100. 03 2.-15 A3. Ill 1.159 .153 .007 .012 .021 .045 .066 .023 .001 54 69. 43 15. 74 0. 93 3. 35 1.35 2.07 4. 56 2. 99 0 . 10 100.52 A3. Ill 1.157 .154 .006 .047 .034 .038 .073 .032 55 73. 40 12. 90 3. 70 n. d. 0.14 2. 35 3.83 2.99 0. 43 0. 43 100.17 A4. IV 1.223 .126 .023 (.046) .004 .042 .061 .032 .005 56 68.12 12.13 n. d. 1.03 trace 1.63 5. 34 1.69 9. 70 trace 99. 64 Al. IV 1.136 .119 — .014 .029 .085 .018 57 74.80 13. 89 trace none 0. 05 2. 59 5. 45 2. 74 0. 77 100.29 A3. Ill 1.247 .136 — — .001 .047 .088 .029 58 70. 47 13. 36 0. 42 0.91 0. 54 1.04 4.01 3. 47 6.10 0.21 100. 53 A3. Ill 1.175 .131 .003 .012 .014 .019 .064 .037 .003 59 73. 47 15. 42 1.02 n. d. 0. 20 1.35 5. 57 3. 64 n. d. 0.12 100.79 A3. Ill 1.225 .151 .006 (.012) .005 .024 .090 .038 .002 60 64.98 19. 50 2. 51 0. 30 0. 50 3. 70 6. 09 2.01 n. d. 99.51 A3. Ill 1.083 .191 .015 .004 .013 .066 .098 .022 • PERSALANE—LASSENOSE. 179 ORDER 4. QUARDOFELIC. BRITANNARE—Continued. SUBRANG 4. DOSODIC. LASSENOSE—Continued. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. so 3 0.28 Q 19.0 or 14.5 ab 43.5 an 15.3 C 0.9 hy 2.4 rut 3.2 East Fork of Clear Creek, Shasta County, California. J. E. Whitfield. J. S. Diller, B. U. S. G. S. 148, p. 191, 1897. Dacite-por¬ phyry. SrO LLO trace trace Q- 27.1 or 10.0 ab41.4 an 15.3 hy 3.1 mt 1.6 il 0.5 Near Enterprise, Butte County, California. W. F. Hille- brand. H. W. Turner, 14 A. R. U. S. G. S., p. 482, 1894. Quartz-diorite. Q 33.1 or 11.1 ab 37.7 an 12.0 C 2.7 hy 3.1 Rocklin, Placer County, California. W. II. Melville. W. Lindgren, B. U. S. G. S. 150, p. 172, 1898. Granite. SrO trace Q 32.2 or 10.6 ab 35.6 an 13.3 di 0.8 hy 3.0 mt 2.1 il 0.6 Near Milton, Calaveras County, California. W. F. Hille- brand. H. W. Turner, 14 A. R. U. S. G. S.,II, p. 484, 1894. Quartz-porphy- rite. SrO LEO 0.07 trace Q 24.2 or 11.1 ab 40.9 an 15.3 C 0.8 hy 4.5 nit 1.4 il 0.6 Indian Valley, Sierra County, California. W. F. Hille- brand. H. W. Turner, 17 A. R. U. S. G. S., I, p. 721, 1896. Granodiorite. Also in J. G., Ill, p. 403, 1895. SrO LEO trace trace Q 34.0 or 16.1 ab 30.9 an 10.6 C 0.8 hy 5.9 mt 0.2 il 0.5 Agua Fria Creek, Mariposa County, California. W. F. Hille- brand. II. W. Turner, 17 A. R. U.S. G. S.,I, p. 691, 1896. Soda granite. SrO LEO 0.08 none Q 26.3 or 10.6 ab 48.7 an 10.0 C 0.5 hy 1. 7 nit 0.5 il 0.3 hm 0.8 Merced River, Mari¬ posa County, Cali¬ fornia. G. Steiger. H. W. Turner, 17 A. R. U.S. G.S.,I, p. 721, 1896. Soda-granite- porphyry. SrO LEO ■ trace trace Q 19.6 or 20.6 ab 35.6 an 15.0 di 3.0 hy 2.7 mt 3.5 Lake Tenaya, Mari¬ posa County, Cali¬ fornia. W. F. Hille- brand. II. W. Turner, 14 A. R, U. S. G. 8,, II, p. 482, 1894. Granodiorite. Zr() 2 Cl FeS., CoO" Cu Pb trace 0.02 0.02 none 0.04 none Q 30.7 or 16.7 ab 30.4 an 13.1 C 1.3 hy 3.2 mt 0.9 il 1.2 Mazaruni district, British Guiana. J. B. Harrison. J. B. Harrison, Priv. contrib. Granitite-gneiss. Dried at 100°. Q 30.5 or 12.8 ab 34.6 ail 12 . 5 ' C 2.0 hy 2.8 mt 1.6 Guaitara Slope, Loma de Ales, Colombia. R. Kuch. R. Kuch, N. J., 1886, I, p. 48. Biotite-horn- blende-dacite. Q 22.5 or 17.8 ab 38.3 an 10.6 C 1.1 hy 9.0 mt 1.4 Juncal Valley, Ar¬ gentina. H. Schlapp. A. Stelzner, Btr. G. Arg. Rep., I, p. 208, 1885. “Andengranit.” Q 32.7 or 17.8 ab 32.0 an 9.2 di 2.2 hy 4.8 il 0.8 Hlidharfjall, n. Myvatn, Iceland. H. Biickstrom. H. Biickstrom, G. F. F., XIII, p. 663, 1890. Obsidian. Q 27.5 or 10.0 ab 44. 5 an 7.2 di 3.4 Berufjord, Iceland. C. W. Schmidt. C. W. Schmidt, Z. D.G.G., XXXVII, p. 778, 1885. Pitchstone. Much H,0. Q 28.7 or 16.1 ab 46.1 an 5.2 wo 3.3 Stanner, n. Old Rad¬ nor, Wales. G. A. .T. Cole. G. A. J. Cole, G. M., XXIII, p. 223, 1886. Quartz-felsite. ! Q 30.5 or 20.6 ab 33.5 an 5.3 C 1.1 hy 2.6 mt 0.7 Puerto de Genoves, Cabo de Gata, Spain. A. Osann. A. Osann, Z. D.G. G., XLIII, p. 689, 1891. Liparite. Pumice. Q 23.5 or 21.1 ab 47.2 an 6.7 hy 2.1 Birkrem, Norway. C. F. Kolderup. C. F. Kolderup, Berg. Mus. Aarb. 1896, No. 5, p. 96. Hypersthene- granite. , Much H.O. Q 13.1 or 12.2 ab51. 4 an 18.3 1 C 0.5 ;hy 1.3 mt 0.9 hm 1.8 Presten, Lofoten Islands, Norway. T. Matthiessen. C. F. Kolderup, Berg. Mus. Aarb. 1898, No. 7, p. 28. Oligoclase rock 180 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS I. PERSALANE—Continued. RANG 2. DOMALKALIC. TOSCANASE—Continued. No. Si0 2 ALA FeA FeO MgO CaO Na 2 0 k 2 o h 2 o+ H 2 0- CO, Ti0 2 P 2 () 5 MnO BaO Sum Sp. gr. 61 68.19 16. 88 1.63 n. d. 1.07 2.19 5.34 3.03 1. 37 0. 14 99. 84 A3. Ill 1.137 .16.6 .010 (.020) .027 .039 .085 .032 .002 62 66. 46 17. 72 2.13 n. d. 0. 95 3. 44 4. 96 2. 86 1.50 0.13 100.15 A3. Ill 1.108 .173 .013 (.026) .024 .061 .080 .030 .002 63 70. 28 14. 93 1.42 1.34 0. 76 3. 29 4. 57 2.62 1.44 . 0.06 100. 71 A3. Ill 1.171 .146 .009 .018 .019 .059 .074 .027 .001 64 60. 45 15. 93 2.57 2. 90 1. 62 2. 77 4.29 2. 77 3. 28 1. 77 1.17 0. 21 99. 86 2. 643 A2. II 1.008 .156 .016 .040 .041 .050 .069 .030 .014 .001 65 71.27 13.91 2. 42 0. 37 0. 77 3. 03 5.45 1.47 0. 78 0.51 99. 98 2. 529 A3. Ill 1.188 .136 .015 .005 .019 .053 .088 .016 .007 66 69. 73 15.97 1.27 1.23 0. 68 3. 28 5. 30 1. 76 0. 53 none 0.21 99. 96 A3. Ill 1.162 .156 .008 .017 .017 .059 .085 .019 .001 67 68. 95 16.13 2. 53 0.99 0. 42 1.29 5. 36 3. 28 1. 29 0.30 100. 54 2. 659 A3. Ill 1.149 .158 .015 .014 .011 .023 .086 .035 .004 68 68.11 15. 80 1.97 1.87 0. 96 2. 43 4.41 2. 80 0. 54 0.16 0. 07 0.62 99.87 2. 665 A2. II 1.135 .155 .013 .027 .024 .043 .071 .030 .001 .004 15° 69 71. 74 14.12 1. 75 0. 59 1.34 2. 32 3. 65 • 2.85 1.45 99. 81 A3. Ill 1.196 .138 .011 .008 .034 .041 .059 .031 70 69. 90 14. 73 n. d. 2.90 0. 72 1.91 4.80 3.01 2.10 99. 57 A4. IV 1.165 .144 — .040 .018 .034 .069 .032 71 72.19 12.56 3. 65 n. d. 2. 52 4. 41 3.35 0. 40 0. 08 100.01 A4. IV 1.203 .123 .023 (.046) .045 .071 :036 .004 72 75. 02 12. 86 1.50 n. d. 0. 95 1.05 5. 01 2.28 0. 90 99. 57 A3. Ill 1.250 .126 .009 (.018) .024 .019 .080 .024 73 69. 71 16. 51 1.50 n. d. 0.34 1. 89 4.56 1.35 3. 85 99. 71 A3. Ill 1.162 .162 .009 (.018) .008 .034 .073 .014 74 65.97 17.50 2.17 n. d. 1.20 2. 69 4.41 1. 76 4.19 99. 89 A4. IV 1.100 .172 .014 (.028) .030 .048 .071 .018 75 67. 80 16. 92 1.05 1.94 1.31 3.25 4. 36 3. 35 0. 33 0.35 100. 66 * m A3. Ill 1.130 .166 .006 .027 .033 .058 .070 .036 .005 % 76 76.19 13. 42 0.41 n. d. trace 1.35 4. 57 2. 63 1.15 99. 72 A3. Ill 1.270 .131 .003 (.006) — .024 .074 .028 77 69.44 15. 21 1.74 0. 56 0. 93 1.99 5.11 4. 53 0. 77 100. 28 A3. Ill 1.157 .149 .011 .008 .023 .036 .082 .048 PERSALANE-LA3SEN0SE 181 ORDER 4. QUARDOFELIC. BRITANNARE—Continued. SUBRANG 4. DOSODIC. LASSENOSE—Continued. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. Q 18.6 or 17.8 nb 44.5 an 10.8 C 1.0 hy 5.4 Various localities in Smaland, Sweden. II. Santesson. O. Nordenskjold, B.G.Inst. tin. Ups.,I, p. 177, 1894. Quartz-syenite- porphyry. Average of sev¬ eral speci¬ mens. Q 16.6 or 16.8 all 41. 9 an 17.0 C 0.2 hy 5.9 Sjogelo region, Sma- land, Sweden. II. Santesson. O. Nordenskjold, B.G.Inst.Un. Ups.,I, p.194,1894. Eorhvolite. Average of sev¬ eral speci¬ mens. FeSo 1.34 Q 26.0 or 15.0 ab 38.8 an 12.5 di 3.2 hy 1.6 mt 2.1 pr 1.3 Lammersdorf, near Aachen, Rh. Prussia. L. Schmidt. Dannenberg and Holz- apfel, Jb. Pr. G. L-A., XVIII, p. 13, 1898. Granite. S0 3 Org 0.10 0.03 Q 15.8 or 16.7 ab 36.2 an 13.9 C 0.7 hy 6.4 mt 3. 7 il 2.2 Munster am Stein, Rh. Prussia. . Gremse. K. A. Lossen, Z. D. G. G., XLIII, p. 537, 1891. • Quartz-por¬ phyry. S0 3 for S. Not fresh. Q 27.6 or 8.9 ab 46.1 an 8.9 di 4.4 mt 1.2 hml. 6 Hirtenberg, Hesse. F. W. Schmidt. C. Chelius, Erl. G. Kt. Hessen, I, Bl. Rossdorf, p. 35, 1886. Granite. ' Q 24.1 or 10.6 ab44.5 an 14.5 di 1.5 hy 2.2 mt 1.9 Melibocus, Oden- wald, Hesse. R. Marzahn. Chelius and Klemm, Erl. G. Kt. Hesse, X, p. 42, 1896. Granite. Q 22.0 or 19.5 ab 45.1 an 6.4 C 1.4 hy 1.1 mt 2.6 il 0.5 hmO. 6 Miihlenthal, near Magdeburg, Saxony. Bodliinder. F. Ivlockmann, Jb. Pr. G. L-A., XI, p. 176, 1892. Quartz-por¬ phyry. S0 3 0.13 Q 25.9 or 16.7 ab 37.2 an 8.3 C 2.4 hy 4.3 mt 3.0 ap 1.4 Miihlberg, Oden- wald, Hesse. Not stated. C. Chelius, cf. N. J. 1884, II, p. 419. Granite. Q 32.4 or 17.2 ab 30.9 an 11.4 C 0.7 hy 3.3 mt 1.9 hmO. 5 Barndorf, Riesenge- birge, Silesia. VC Herz. L. Milch, N. J. B. B., XII, p. 156, 1899. Granitite. Q 26.0 or 17.8 ab36.2 an 9.5 C 0.9 hy 7.1 Vincenzo, Campiglia Marittima, Tus¬ cany. C. Dalmer. C. Dalmer, N. J., 1887, II, p. 213. Quartz-tra¬ chyte. Q 26.0 or 20.0 ab 37.2 gn 4.4 di 7.0 hy 4.7 Basiluzzo Island, .Eolian Islands. F. Glaser. A. Bergeat, Abh. Munch. Ak., XX, p. 61, 1899. Obsidian. * Q 32.8 or 13.3 ab 41.9 an 5.3 C 0.3 hy 4.8 Mount Kastel, Crimea, Russia. R. Prendel. R. Prendel, cf. N. J., 1887, II, p. 95. Liparite. Q 32.8 or 7.8 ab 88.3 an 9.5 C 4.2 hy 3.2 n. Alouchta, Crimea, Russia. A. Lagorio. A. Lagorio, Guide Exc. 7 Cong., G. Int., XXXIII, p. 27, 1897. Quartz-porphy- rite. Q 24.7 or 10.0 ab 37.2 an 13.3 C 3.6 hy 6.7 Charkha, Crimea, Russia. A. Lagorio. A. Lagorio, Guide Exc. 7 Cong., G. Int., XXXIII, p. 27, 1897. lveratophyr. - Q 19.4 or 20.0 ab 36. 7 an 16.1 hy 6.0 mt 1.4 Mount Elbruz, Cau¬ casus. A. Dannenberg. A. Dannenberg, T. M. P. M., XIX, p. 233, 1900. Dacite. Segregation in other dacite. Q 35.8 or 15.6 ab 3N. s an 7.8 C 0.5 hy 0.9 Unga Islhnd, Kam¬ chatka, Siberia. P. Wenjukoff. P. Wenjukoff, cf. N. J., 1891, I, p. 281. Liparite. Q 17.9 or 26.7 ab43.0 an 5.3 di 3.7 hy 0.6 in t 1.9 hm 0.2 Porobbo, Toba Lake, Sumatra. W. Herz. L. Milch, . Z. D. G. G., LI, p. 69, 1899. Quartz-tra- chvte-ande- site. 182 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS I. PERSALANE—Continued. RANG 2. DOMALKALIC. TOSCANASE—Continued. No. Si0 2 AlA Fe 2 G 3 FeO MgO CaO Na 2 0 Iv 2 0 h 2 o+ H 2 0— o o to Ti0 2 P 2 0 5 MnO BaO Sum Sp. gr. 78 71.29 15. 70 1.50 0. 30 0.89 3.41 4.81 2. 35 0. 07 trace 100. 32 A3. Ill 1.188 .154 .009 .004 .022 0.55 .077 .025 — 79 72. 70 13.85 2. 50 n. d. 0. 94 3.34 4. 60 2. 46 n. d. trace trace 100. 39 A4. IV 1.212 .136 .016 1 (.032) .024 .059 .074 .026 • , - RANG 2. DOM ALKALIC. TOSCANASE. 1 74. 21 14. 47 0.35 0.50 0. 28 1. 71 7. 62 0.10 0.23 0.15 0. 30 0.07 none none 99. 99 Al. I 1.236 .142 .002 .007 .007 .030 .122 .001 .004 .001 — — 2 67.88 17. 21 2.00 1.62 1.52 3.08 5. 71 0. 26 0. 45 • none 0.20 0.10 0.09 100.12 A2. II 1.131 . 169 .013 .022 .038 . 055 .092 .003 / .002 .001 .001 3 67. 62 17.03 1. 30 1. 71 1.51 3.11 5. 86 0. 63 0. 50 0.10 0.34 0.01 trace 99. 72 2. 684 A2. II 1.127 .167 .008 .024 .038 . 055 .094 .007 i .004 — — RANG 3. ALKALICALCIC. COLORADASE. 1 64. 34 17. 87 2. 55 n. d. trace 3. 06 1.63 4.52 6.19 100.14 A4. IV 1.072 .175 .016 (.032) — .054 .026 .048 RANG 3. ALKALICALCIC. COLORADASE. 1 64. 05 15. 38 2.20 2. 74 2. 08 4. 30 2. 74 4. (.0 0. 83 0.27 0. 35 0. 60 0.21 0.11 0. 08 100. 06 Al. I 1.068 .150 • .014 .038 .052 .077 . .044 .042 .007 .002 .002 .001 2 63. 88 15. 84 2.11 2.59 2.13 3.97 2. 81 4. 23 0. 66 0. 22 0. 65 0.21 0.07 0. 09 99. 82 Al. I 1.065 . 155 .013 .036 .053 .071 . 045 . 045 .008 .002 .001 .001 3 62. 53 19. 01 1.96 1.44 1. 29 5.17 3. 45 3.30 0. 45 0.21 none 0. 65 0.17 0. 03 0.13 99. 83 Al. I 1.042 .186 .013 .020 .032 .093 . 056 . 035 . 008 .002 .001 4 65. 36 15. 48 3.09 1. 21 1.53 4.14 3. 58 3.41 0. 70 0. 82 0. 52 0. 25 0.19 0. 08 100. 36 Al. I 1.089 .152 .020 .017 .038 .074 . 058 .036 .006 .002 .002 .001 5 63. 91 17. 07 4. 39 1.51 0. 81 4.47 3.48 3. 74 0. 33 0. 21 99. 92 2. 751 A3. Ill 1.065 .167 .027 .021 .020 .080 .056 .039 .001 14° 6 65. 68 15. 87 1. 78 1.25 1. 79 3. 50 3. 20 3.37 3. 10 0.93 0. 23 100. 75 A2. II 1.095 .155 .011 .018 .045 .062 .051 .036 .012 .002 7 65. 13 15. 73 2. 24 1.86 1.49 3. 62 2.93 3. 96 1.91 0. 52 0. 58 0. 23 trace 100.27 A2. II 1.086 .154 .014 .026 .037 .064 .047 .042 .007 .002 — 8 67. 45 15.51 1. 76 2. 21 1. 10 3. 60 3.47 3. 66 0.63 0.14 0. 58 0.12 100. 25 A2. II 1.124 . . 152 .011 .031 .028 .064 .056 .039 .007 .001 PERSALANE-AMIATOSE. 183 ORDER 4. QUARDOFELIC. BRITANNARE—Continued. SUBRANG 4. DOSODIC. LASSENOSE—Continued. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. Q 26.8 di 0.7 or 13.9 hy 1.9 nb 40.3 nit 0.9 an 14.5 hm 0.8 Lyttleton, Banks Pen¬ insula, New Zea¬ land. P. Marshall. P. Marshall, Tr.N.Z. Inst., XXVI, p. 379, 1894. Tridymite- trachyte. Mean of 3. Q 27.7 di 5.5 or 14.5 hy 4.0 ab 38.8 an 10.0 Lyttleton, Banks Pen¬ insula, New Zea¬ land. P. Marshall. P. Marshall, Tr. N. Z. Inst., XXVI, p. 379, 1894. Tridymite- trachyte. Mean of 2. SUBRANG 5. PERSODIC. MARIPOSOSE. SrO trace LioO trace Q 26.5 or 0.6 ab 63.9 an 5.3 di 1.9 wo 0.4 mt 0 .5 il 0.6 Near Mariposa, Mari¬ posa County, California. W. F. Hille- brand. H. W. Turner, 17 A. R. U. S. G. S.,I, p. 721, 1896. Aplite. Also in J. G., Ill, p. 403, 1895. • Q 24.2 or 1.7 ab 48.2 an 15.3 C 1.9 hy 5.0 mt 3.0 Towakaima Falls, Barama River, British Guiana. J. B. Harrison. J. B. Harrison, R. G. N. W. Distr., II, 1898, p. 10. Granite. Dried at 100°. Q 21.7 or 3.9 ab 49.3 an 15.3 C 1.1 hy 5.4 mt 1.9 il 0.6 Essequibo, etc., rivers, British Guiana. Assistant of J. B. Harrison. J. B. Harrison, R. G. Ess. rivers, 1900, p. 52. Granophyre. Average sample. Dried at 100°. Alkalies? SUBRANG 2. DOPOTASSIC. Q 29.3 or 26.7 ab 13.6 an 15.0 C 4.8 hy 4.2 Scogliatelle, Ponza Island, Italy. G. Aichino. V. Sabatini, B. C. G. I., XXIV, p.252,1893. Retinite. SUBRANG 3. SODIPO r ASSIC AMIATOSE. s SrO Cu 0.07 0.04 0.01 Q 20.0 or 23.4 ab 23.1 an 20.6 di 0.8 hy 5.2 mt 3.2 il 1.2 Gagnon Mine, Butte, Montana. H. N. Stokes. W. II. Weed, J. G., VII, p. 739, 1899. Granite. Complete in B. U. S.G. S.,168, p. 117,1900. so 3 Cl SrO 0.34 trace 0.02 Q 19.3 or 25.0 ab 23.6 an 18.1 di 1.3 hv 6.7 nit 4.2 Walkerville Station, Butte, Montana. H. N. Stokes. W. H. Weed, J. G., VII, p. 739, 1899. Granite. Near harzose. Complete in B. U. S.G.S.,168, p. 116,1900. S0 3 SrO Li 2 0 none 0.04 trace Q 16.7 or 19.5 ab 29.3 an 25.9 C 0.2 hy 3.2 mt 3.0 il 1.1 Hiawatha Creek, Butte District, Mon¬ tana. H. N. Stokes. Weed and Tower, B. U. S. G. S., 168, p. 119, 1900. Andesite-por¬ phyry. Q, 20.6 or 20.0 ali 30.4 an 19.2 di 1.1 hy 3.3 mt 2. 6 il 0.9 hml.4 Mount Carbon, West Elk Mountains, Col¬ orado. T. M. Chatard. W. Cross, 14 A. R. U. S. G. S., p. 227, 1894. Quartz-po r p h y - rite. Q, 19.4 or 21.7 ab 29.3 an 20.0 di 1.8 hy 1.2 mt 4.9 hml.O Sultan Mountain, San Juan County, Col¬ orado. L. G. Eakins. W. Cross, B. U. S. G. S., 148, p. 180, 1897. Augite-diorite. Dried at 100°. Q. 24.2 or 20.0 ab 26.7 an 17.2 C 0.6 hy 4.5 mt 1.4 il 1.8 hm 0.8 Waller Defeat shaft, Washoe, Nevada. G. E. Moore. G. F. Becker, M. II. S. G. S., Ill, p. 282, 1882. Mica-andesite. Also in Hague and Iddings, B. U. S. G. S., 17, p. 33,1885. NiO 0.07 Q 22.9 or 23.4 ab 24.6 an 17.8 C 0.1 hy 4.4 mt 3.2 il 1.1 S. of Carbon Ridge, Eureka District, Nevada. W. H. Melville. Hague and Iddings, M. U. S. G. S., XX, p. 264, 1892. Andesitic per¬ lite. Q 23.5 or 21.7 ab 29.3 j an 15.8 di 1.6 hy 3.7 mt 2.6 il 1.1 Silver Lake House, Pyramid Peak, El¬ dorado Co., Ca}. G. Steiger. W. Lindgren, A. J. S., Ill, p. 306, 1897. Granodiorite. 184 CHEMICAL ANALYSES OF IGNEOUS ROCKS. CLASS I. PERSALANE—Continued. RANG 3. ALKALICALCIC. COLORADASE—Continued. No. Si0 2 A1A FeA FeO MgO C'aO Na 2 0 K,0 h 2 o+ H 2 0- co 2 Ti0. 2 PA MnO BaO Sum Sp.gr. 9 70. 75 ; 15.13 0. 98 1.43 0. 73 3.09 3. 05 3.62 0.51 0.10 none 0.42 0.10 trace 0.12 100.13 Al. I. 1.179 .148 .006 .019 .017 . 055 .049 .038 .005 .001 — .001 10 64. 48 16. 50 3. 47 n. d. 1. 60 4.42 3.13 3. 72 2. 94 100. 26 A4. IV 1.075 .162 . 022 (.044) .040 .078 .050 .039 11 68. 26 14. 35 1.30 2.34 1.13 2. 85 2. 45 3.64 3.17 0. 70 100.19 A3. Ill 1.138 .141 .008 .032 .018 .051 .040 .038 .010 12 65. 69 16.41 0. 73 2. 74 1.42 3. 36 2. 39 5.24 1.20 0.44 trace trace 100. 83 2. 581 Al. I 1.095 .161 .005 .038 .036 . 060 . 039 .056 .006 — — 15° 13 65. 53 16. 89 1.00 2.38 1.17 3.24 2.71 4. 59 1.98 0.46 trace trace 100.85 2. 540 Al. I 1.092 . 106 .006 .033 .029 . 058 .044 .049 .006 — — 15° 14 65. 79 16. 58 5.18 11. d. 0.98 3. 05 2. 34 4. 63 1.83 100. 37 A4. IV 1.097 .162 . 032. (.064) .025 .054 .037 .049 15 . 63. 71 17. 28 2.41 1. 16 2. 93 5.16 2. 60 4. 22 0. 96 trace 100. 43 2. 707 A3. Ill 1.062 . 169 .015 .016 .073 . 092 .042 .045 — 15° 16 63.17 17.15 2.84 1. 31 2.17 4.17 3. 08 4. 19 2. 51 100. 59 2. 525 A3. Ill 1.053 .168 .018 .018 .054 .074 .050 .045 17° 17 61. 93 18.47 1.93 2. 23 2.66 4.31 2. 92 3. 92 2. 28 100.65 2. 601 A3. Ill 1.031 .181 .012 .031 .067 .077 .047 .042 18° 18 67. 85 18. 39 1.27 n. d. 0. 60 4. 82 2. 38 3.42 2. 23 100. 96 B3. IV 1.131 .180 .008 (.016) .015 .086 .039 .036 19 67. 62 15. 93 4.37 n. d. 1. 33 4.44 3.18 2.87 0. 99 100. 73 A4. IV 1.127 .156 .027 (.054) .033 .079 .051 .031 20 66. 55 15. 61 2.42 n. d. 0.51 3. 49 2. 89 4. 29 4.81 100. 57 A4. IV 1.109 . 153 .015 (.030) 0.13 .062 .047 .046 21 66. 27 18. 66 1. 99 n. d. 0. 66 4. 89 3. 65 3. 39 0. 70 100.21 A3. Ill 1.105 .183 .013 (.026) .017 . 0S7 .059 .036 RANG 3. ALKALICALCIC. COLORADASE. 1 67. 74 16.13 1.50 1.96 1.36 4. 41 4.92 1.30 0. 86 0.10 trace 100.28 A3. Ill 1.129 .158 ! .009 .028 .034 .078 .079 .014 — 2 67. 33 16.20 1.40 2. 73 1.31 2.81 3.15 2.14 1.84 O 00 0.16 trace 0.05 99. 92 A2. II 1.122 .159 .009 .008 .033 .050 .051 .023 .010 .001 — — 3 62. 91 19. 13 0.98 3. 20 1.69 4. 28 3. 94 3. 38 0. 63 100.14 9 A3. Ill 1.049 .187 1 ] . 006 .044 .042 .077 .063 .035 PERSALANE-YELLOWST( )NOSE. 185 ORDER 4. QUARDOFELIC. BR1TANNARE—Continued. SUBRANG 3. SODIPOTASIC. AM IATOSE—Continued. I nclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. FoS a NiO SrO Li a O 0.06 none 0.04 trace Q 31.3 or 21.1 ab 25.7 an 15.3 C 0.6 hy 2.7 mt 1.4 il 0.8 North Fork of Tuo¬ lumne River, Ama¬ dor County, Cal. W. F. Hille- brand. II. W. Turner, 17 A. R. U. S. G. S.,I, p. 702, 1896. Biotite-granite. ' Q. 18.4 or 21. 7 nb 26.2 an 20.3 dl 1.2 hy 9.2 N. S. de Guadelupe, n. Mexico, Mexico. A. Lagorio. A. Lagorio, T. M. P. M., VIII, p. 458, 1887. Andesite. Q 31.6 or 21.1 ab 21.0 anl4.2 C 1.2 hy 5.3 mt 1.9 Skrutten, Helsing- land, Sweden. H. Santesson. F. Svenonius, G. F. F., X, p. 273, 1888. Andesite brec¬ cia. X SO;, Cl Li,0 0.77 0.17 0.03 0.24 Q 20.5 or 31.1 ab 20.4 an 16.7 C 0.6 • hy 7.2 mt 1.2 il 0.9 Nocchetto, Mount Amiata, Tuscany. J. F. Williams. J. F. Williams, N. J. B. B., V, p. 408, 1887. Trachyte. S0 3 for S.? X so :i Cl Li.,0 0 . 01 0.20 0.09 trace Q 22.0 or 27.-2 ab 23.1 an 16.1 C 1.5 hy 5.9 mt 1.4 il 0.9 Casa la Fornacina, Mount Amiata, Tuscany. J. F. Williams. J. F. Williams, N. J. B. B., V, p. 410, 1887. Trachyte. S0 3 for S.? Q 23.0 or 27.2 ab 19.4 an 15.1 C 2.2 hyl0.9 Mount Amiata, Tus¬ cany. L. Ricciardi. L. Ricciardi, Gazz. Chem. Ital., XVIII, 1888. Trachyte. Q 17.6 or 25.0 ab 22.0 an 22.2 di 2.6 hy 6.2 mt 3. 5 Near Adaini Mine, Laurion, Greece. R. Lepsius. R. Lepsius, G. von Attika, Berlin, 1893, p. 90. Granite. Near hartzose. / | Q 17.0 or 25.0 nb 26.2 an 20.3 hy 5.4 mt 4.2 SE. slope of Acropo¬ lis, Pergamon, Asia Minor. H. S. Washing¬ ton. H. S. Washington, A. J. S., Ill, p. 49, 1897. Biotite-dacite. Dried at 110°. Q 15.4 or 23.4 ab 24.6 an 21.4 C 1.5 hy 9.3 mt 2.8 Kara Tash, Smyrna, Asia Minor. H. S. Washing¬ ton. H. S. "Washington, A. J. S., Ill, p. 45, 1897. Augite-andesite. Dried at 110°. Q 28.7 or 20.0 ab 20.4 an 23.9 C 1.9 hy 3.7 Cap Blanc, n..Mener- ville, Algeria. Duparc and Pearce. Duparc, Pearce, and Rit¬ ter, Mem. Soc. Ph. Genev., XXXIII, p. 59, 1900. Hypersthene- dacite. Q 23.7 or 17.2 ab 26.7 an 20.6 di 1.3 hy 9.7 Dra zeg Etter, n. Menerville, Algeria. ( Duparc and Pearce. Duparc, Pearce, and Rit¬ ter, Mem. Soc. Ph. Genev., XXXIII, p. 129, 1900. Dacite. Q. 23.2 or 25.6 ab24.6 an 16.7 di 0.4 hy 5.0 Cap Blanc, n. Mener¬ ville, Algeria. Duparc and Pearce. Duparc, Pearce, and Rit¬ ter, Mem. Soc. Ph. 3 Fe 2 0 3 FeO MgO CaO Na^O k 2 o H 2 0 + H,0- CO, Ti0 2 PA MnO BaO Sum Sp. gr. 4 65. 23 16. 94 1.60 1.91 1.31 3. 85 3. 57 3. 02 0. 88 0.18 0. 25 0. 66 0.19 trace 0.19 99. 78 Al. I 1.0S7 . 166 .010 .027 .033 .069 .058 .032 .008 .001 — .001 5 67. 54 17. 02 2. 97 0. 34 0.13 3. 36 4. 62 2. 28 0. 55 0.80 trace trace 100.05 A2. II 1.126 .167 .019 .005 .003 .060 .075 .024 .010 — 6 66. 05 16. 96 2. 59 1.38 2.08 3.37 4. 20 2. 53 0. 69 0.34 trace none 100. 22 A2. II 1.101 .166 .016 .019 .052 .060 .068 .027 .004 _ — 7 65. 97 16.53 2.59 1.72 2. 11 3.37 3. 41 2. 67 1.23 0.42 trace none 100. 33 A2. II 1.100 .162 .016 .024 .053 .060 .055 .028 .005 -r. 8 65. 60 17. 61 0. 95 2. 76 1.49 3. 72 4. 36 2.36 0. 59 0. 75 0.16 none 100. 38 A2. II 1.093 .173 .006 .038 .038 .066 .070 .025 .009 .001 — 9 64. 85 16. 57 2.10 2.15 2.14 4. 01 3. 71 3.10 0. 35 0.91 0.14 none 100. 03 A2. II 1.081 .162 .013 .030 .054 .072 .060 .033 .011 .001 — 10 65. 66 15. 61 2.10 2.07 2. 46 3.64 3.65 2. 03 1.07 1.37 trace none 100. 27 A2. II 1.094 .153 .013 .029 . 062 .065 .059 .022 .017 — — 11 64. 27 17.84 3.36 1.29 2. 00 3.42 3.84 2. 48 1.32 0.32 0.16 none 100. 33 A2. II 1.071 .175 .021 .018 .050 .061 .062 .026 .004 .001 — 12 65. 63 17.00 2.55 1.19 2. 03 3. 48 4. 42 1.64 2.00 0. 27 trace 0. 07 none 100.32 A2. II 1.094 .167 .016 .017 .051 .062 .071 .018 * .001 — 13 64.61 18. 62 2. 78 0. 95 0. 85 4. 20 4. 37 2.36 0. 93 0. 25 none 0.30 trace 100.23 A2. II 1.077 .182 .017 .014 .021 .075 .071 .025 .002 — 14 64. 23 16. 34 1.07 1.58 2.47 3. 07 3.49 2.59 1.76 0. 47 0. 30 0. 50 0.18 trace 0.19 99. 91 Al. 1 1.071 .160 .007 .022 .062 .055 . 056 .027 .006 .001 — .001 15 63. 76 16.01 2. 22 1.96 2. 43 4.55 3. 98 2. 84 0. 57 0. 28 0. 23 0.52 0. 25 0. 09 0.17 99. 95 Al. I 1.063 .157 .014 .028 .061 .081 .064 .030 .006 .002 .001 .001 16 63.42 17.16 3. 09 1.50 1.64 4. 65 4. 51 3. 04 0. 28 0.16 0. 35 0. 26 0.04 100. 29 A2. II 1.057 .169 .019 .021 .041 .083 .073 .032 .004 .002 — 17 61. 50 17.42 4. 66 1.09 1.26 5. 33 3.99 1.29 2.44 none 0. 60 trace 99. 96 A2. II 1.015 .170 .029 .015 .032 .094 .064 .014 — .004 — 18 68.10 14. 97 2. 78 1. 10 1.10 3.04 3. 46 2. 93 1.28 0. 92 0. 07 0.16 0.09 none 100. 11 2. 736 Al. I 1.135 .147 .017 .015 • .015 .054 .056 .031 .001 .001 .001 — 16“ 19 67.01 18. 03 0. 66 0. 72 0. 84 3.99 4. 42 3. 53 0. 91 0.10 0. 09 0.10 1(H). 40 A2. II 1.117 .175 .004 .010 .021 .071 .071 .037 .001 .001 .001 20 63. 66 17. 05 1.97 2. 62 1.99 3.89 4.13 3. 09 1.19 0. 27 0.14 100.08 A2. II 1.061 .167 .013 . 036 .050 .070 .066 .033 .002 .002 PERSALANE-YELLOWSTONOSE. 187 ORDER 4. QUARDOFELIC. BRITANNARE—Continued. SUBRANG 4. DOSODIC. YELLOWSTONOSE—Continued. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. so 3 s none none Q 22.0 or 17. 8 ab 30.4 an 19.2 C 0.7 hy 4.5 mt 2.3 il 1.2 Silver Wreath Tunnel, Willow Creek Dist., Boise Co., Idaho. G. Steiger. W. Lindgren, 18 A. R.U. S. G. S., Ill, p. 640, 1898. Biotite-granite. so 3 ct LLO 0.26 0.15 0.03 Q 24.5 or 13.3 ab 39.3 an 16.7 C 0.8 hy 0.8 il 1.2 hm 3.0 Electric Peak, Yel¬ lowstone National Park. J. E. Whitfield.- J. P. Iddings, 12 A. R.U. S. G. S., I, p. 627, 1891. Quartz-mica- diorite. SO : , for S. Near lassenose. so 3 Cl LLO 0.03 trace none Q 21.5 or 15.0 ab 35.6 an 16.7 C 1.1 hy 5.2 mt 3.7 il 0.5 Electric Peak, Yel¬ lowstone National Park. J. E. Whitfield. J. P. Iddings, 12 A. R. U. S.G. S.,I, p. 627, 1891. Quartz-mica- diorite. S0 3 for S. so 3 Cl Li.,0 0.13 0.09 0.09 Q 25.6 or 15.6 ab28.8 an 16.7 C 1.9 hy 5.7 mt 3.7 il 0.8 Electric Peak, Yel¬ lowstone National Park. J. E. Whitfield. J. P. Iddings, 12 A. R. U. S. G. S.,I, p. 627, 1891. Quartz-miea- diorite- porphyrite. S0 3 for S. S0 3 Cl Li.,0 trace none 0.03 Q 19.8 or 13.9 ab 36.7 an 18.3 C 1.2 hy 6.9 mt 1.4 il 1.4 Electric Peak, Yel¬ lowstone National Park. J. E. Whitfield. J. P. Iddings, 12 A. R. U. S. G. S., I, p. 627, 1891. Quartz-mica- diorite. S0 3 Cl LLO trace none none Q 19.3 or 18.3 ab31.4 an 19.2 di 0.8 hy 5.9 mt 3.0 il 1.7 Electric Peak, Yel¬ lowstone National Park. J. E. Whitfield. J. P. Iddings, 12 A. R.U. S. G. S.,I, p. 627, 1891. Quartz-mica- diorite. S0 3 Cl LLO 0.13 0.12 0.36 Q 25.0 or 12.2 ab 30.9 an 18.1 C 0.7 hy 6.2 mt 2.8 il 2.6 Sepulchre Mountain, Yellowstone Na¬ tional Park. J. E. Whitfield. J. P. Iddings, 12 A. R. U.S. G. S., I, p. 648, 1891. Dacite. so 3 Cl Li 2 0 trace none 0.03 Q 22.3 or 14.5 ab 32.5 an 17.0 C 2.7 hy 5.0 mt 4.2 il 0.6 Sepulchre Mountain, Yellowstone Na¬ tional Park. J. E. Whitfield. J. P. Iddings, 12 A. R. U. S. G. S.,I. p. 648, 1891. Hornblende- mica- andesite. so 3 Cl LioO trace trace 0.04 Q 23.1 or 10.0 ab 37.2 an 17.2 C 1.6 hy 5.1 mt 3.8 Fan Creek, Yellow¬ stone National Park. J. E. Whitfield. * J. P. Iddings, M.U.S.G.S., XXXII, p. 81, 1899. Hornblende- mica-andesite- porphyry. so 3 Cl ‘ LLO trace trace 0.01 Q 19.8 or 13.9 ab37.2 an 20.9 C 1.1 hy 2.1 mt 3.2 hm 0. 6 Crescent Hill, Yel¬ lowstone National Park. J. E. Whitfield. J. P. Iddings, M.U.S.G.S., XXXII, p. 272, 1899. Hornblende- mi ca-an de¬ site. FeSo NiO' SrO LLO 1.61 none 0.06 trace Q 23.5 or 15.0 ab 29.3 an 15.3 C 2.2 hy 7.5 mt 1.6 il 0.9 pr 1.6 Crater Mountain, Yellowstone Na¬ tional Park. H. N. Stokes. Hague and Jaggar, B. U. S. G. S., 168, p. 96, 1900. Granite-por¬ phyry. Cl NiO SrO Li s O trace none 0.09 trace Q 16.6 or 16.7 ab 33.5 an 20. 3 di 1.8 hy 6.2 mt 3.2 il 0.9 Needle Mountain, Yellowstone Na¬ tional Park. H. N. Stokes. Hague and Jaggar, B. U. S. G. S. 168, p. 96, 1900. Diorite. Near tonalose. NiO 0.19 Q 14.2 or 17.8 ab 38.3 an 17.8 di 4.2 hy 2.4 mt 3.9 il 0.6 hm 0.3 Hurricane Ridge, Crandall Basin, Yell. Natl. Park. W. H. Melville. J. P. Iddings, M.U. S.G.S., XXXII, p. ’261, 1899. Quartz-diorite- porphyrite. S0 3 Li.,0 0.35 0.03 Q 21.8 or 7.8 ab 33.5 an 22.5 C 1.1 hy 3.2 mt 3.5 hm2.2 ap 1.4 Indian Creek Lacco¬ lith, Yellowstone National Park. W.H. Whitfield. J. P. Iddings, M. U.S.G.S.,XXXII, p. 61, 1899. Hornblende- mica-por- phvrite. S0 3 for S. Cl SrO 0.03 0.08 Q 28.7 or 17.2 ab 29.3 an 15.0 C 0.6 hy 2.7 mt 3.9 Johnson Gulch, Lead- ville, Colorado. W. F. Hille- brand. W. Cross, M. U. S. G. S., XII, p. 332, 1886. Porphyry SrO Li»0 0.08 none Q 18.2 or 20.6 ab 37.2 an 18.6 Q 15.5 or 17.3 ab 34.6 an 18.9 di 0.9 hy 2.5 mt 0.9 hy 8.1 mt 3.0 ap 0.6 Copper Mountain, Leadville, Colo¬ rado. Gold Hill, Ten Mile District, Colorado. L. G. Eakins. W. F. Hille- brand. W. Cross, B. U. S. G. S., 148, p. 176, 1897. W. Cross, 14 A. R. U.S. G. 8., II, . p. 227, 1894. Diorite-por- phyry. Quartz-horn- blende-mica- porphyrite. 188 CHEMICAL ANALYSES OF IGNEOUS ROCKS. CLASS I. PERSALANE—Continued. RANG 3. ALKALI CALCIC. COLORADASE—Continued. No. Si0 2 Al 3 O g Fe,Og FeO MgO CaO Na,0 K,0 h 2 o+ h 2 o- C0 2 TiO, PA MnO P>aO Sum • Sp. gr. 21 62. 85 16.21 3. 08 1.46 1.47 4. 72 3.49 3.10 2. 03 0. 29 0.41 0. 48 0.15 0.11 99. 85 Al. I 1.048 .159 .020 .020 .037 .084 0.56 .033 .005 .003 .002 .001 ' 22 61.42 17.69 4.24 1. 74 1.81 5. 29 3.14 3.19 0. 97 0. 37 0.14 0.19 0. 09 100.28 Al. I 1.024 .174 .027 .025 .045 .094 . 050 .034 .005 .001 .003 .001 23 59. 29 21.27 3.33 1.04 1.12 5. 25 3. 39 3. 00 1. 63 0.23 0. 21 99. 76 2. 596 A2. II .988 .208 .020 .014 .028 .094 . 055 .032 .002 .003 14.5° 24 63. 30 17.81 3.42 0. 83 2.07 5.12 4.27 2. 26 0. 88 99. 96 A3. Ill 1.055 .174 .021 .011 . 052 .091 0.69 .024 25 68.12 16. 24 1. 26 2.08 1. 35 3.80 3. 89 2.54 0. 40 0. 25 0.14 0.10 0. 09 100.28 Al. I 1.135 .159 .008 .030 .034 .068 .063 .027 .003 .001 .001 .001 26 68.10 15.18 1.34 1. 70 2. 06 4. 66 3. 71 1.48 0. 55 0. 35 0.18 0. 20 0. 06 99. 57 A2. II 1.135 .149 .008 .024 .052 .083 .059 .016 .004 .001 .003 — 27 64.48 19. 28 1.40 1. 78 1.64 5. 06 4.41 1.12 0. 06 • 99. 23 B3. IV 1.075 .189 .009 .025 .041 .090 .071 .012 - 28 64. 52 18. 31 0.90 2. 51 2. 35 5.11 4. 64 1.25 0.20 99. 79 A3. Ill 1.075 .179 .006 .035 . 059 .091 .075 .014 29 64. 24 18. 67 1.40 1.96 1.48 f 4.11 4.14 1. 71 1.18 0. 76 0. 08 trace 100.20 . 05 A2. II 1.071 .183 .009 .028 .037 .073 .067 .018 .009 .001 — 100.15 30 63.81 17.07 2.11 2.15 2. 28 4.97 4. 08 1.96 1..03 — 0.38 0.10 0. 09 0. 04 100.10 Al. I 1.004 .167 .013 .030 .047 .089 .066 .021 .005 .001 .001 — 31 67. 33 15. 93 1.90 1. 59 1.63 4. 09 3. 76 2. 46 0. 66 0.19 0.36 0.11 0. 09 0. 08 100.18 Al. 1 1.122 .156 .012 .022 .041 .073 .060 .025 .005 .001 .001 .001 32 66. 94 16. 49 1.41 1.87 1.98 4. 77 3. 88 1. 65 0. 22 0. 35 0. 30 0.12 0.13 0. 07 100. 23 Al. I 1.116 .161 .009 .027 .050 .086 .063 .018 .004 .001 .002 — 33 66. 65 17. 61 0. 93 1.67 1.26 4. 44 4.59 1.70 0. 41 0. 03 0. 33 0.18 0. 07 0.12 99. 99 Al. I l.lil .172 .006 .024 .032 .079 .074 .018 .004 .001 .001 .001 34 66. 65 16.15 1.52 2. 36 1. 74 4.53 3.40 2. 65 0. 72 0.18 0. 38 0.10 0.10 0. 07 100.57 Al. I l.lil .158 .009 .033 .044 .080 .053 .029 .005 .001 .001 — 35 65. 43 17.11 2.39 1. 19 1.48 3.88 3. 66 2. 83 0. 36 0. 20 0. 83 trace 0. 70 100. 26 A2. II 1.091 .168 .015 .017 .037 .070 .059 .030 .010 — .010 36 71. 63 13. 86 0. 46 2. 76 trace 3. 26 3. 40 2. 65 0. 89 trace 0. 20 99.11 2. 68 B2. Ill 1.194 .136 .003 .038 — .058 .055 .028 — .001 37 66. 02 17. 06 2.14 3. 01 1.97 4.64 3. 98 1.44 0.36 0.05 100. 67 2. 544 A3. Ill 1 . 100 .167 .013 .042 .049 .083 .064 .016 .001 38 65.10 16.16 3. 28 0. 90 1.82 4. 30 3. 35 2.40 2.58 n. (1. 0.30 100.19 2. 574 A3. Ill 1.085 .158 .020 .012 .046 .077 .054 . 025 — .002 PE RS ALAN E-Y EL LO W STONOSE. 189 ORDER 4. QUARDOFELIC. BRITANNARE—Continued. SUBRANG 4. DOSODIC. YELLOWSTONOSE—Continued. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. Q 20.1 or IS. 3 ab 29.3 an 19.5 di 0.5 hv 3.4 nit 3.5 il 0.S inn 0.8 Mount Marcellina, West Elk Moun¬ tains, Colorado. T. M. Chatard. W. Cross, 14 A. R. U. S.G. S.,II, p. 227, 1894. Diorite-por- phyrite. Q 17.5 or 18.9 ab 26.2 an 25.0 di 1.0 hy 4.1 nit 4.6 il 0.8 hml.l Storm Ridge, West Elk Mountains, Colorado. L. G. Eakins. W. Cross, 14 A. R. U. S.G. S.,II, p. 227, 1894. Porphyrite. Near tonalose. Q 15.0 or 17.8 ab 28.8 an 26.1 C 2.8 hy 2.8 mt 3.2 lrn 1.0 Table Mountain, Denver, Colorado. L. G. Eakins. W. Cross, Proc. Colo. Sc. Soc., I, p. 72, 1886. Augite-ande- site. Pebble. A1 2 0 3 high? Q 16.4 or 13.3 ab 36.2 an 22.5 di 2.2 hy 4.2 nit 2.6 hml.6 Mount Rose, Washoe, Nevada. R. W. Wood¬ ward. G. F. Becker, M. L. S. G. S., Ill, p. 152, 1882. Hornblende- mica-ande¬ site. Also in Hague and Iddings, B. U.S. G. 17, p. 33, 1885. Cr.0 3 SrO LioO none 0.02 trace Q 25.6 or 14.0 ab 33.0 an 18.9 hy 6.0 mt 1.9 il 0.5 Crater Peak, Shasta County, California. W. F. Hille- brand. H. W. Turner, 17 A. R. U. S. G. S. I, p. 731, 1896. Hypersthene- andesite. Also in J. G., Ill, p. 407, 1895. ♦ Q 27.8 or 8.9 ab 30.9 an 20.6 di 2.2 hy 5.8 mt 1.9 il 0.6 Ono, Shasta County, California. T. M. Chatard. B. U. S. G. S. 148 p. 191, 1897. Diorite. Not described. Q 20.4 or 6.7 ab 37.2 ail 25.0 C 1.6 hv 6.2 mt 2.1 Black Butte, Mount Shasta, California. W. H. Mel¬ ville. J. S. Diller, B. U. S. G. S. 150, p. 223, 1898. Hornblende- andesite. Near amado- rose. Q 16.3 or 7.8 ab 39.3 an 25.3 hy 9.8 mt 1.4 West base Mount Shasta, California. W. H. Mel¬ ville. J. S. Diller, B. U. S. G. S. 150, p. 228, 1898. Hvpersthene- andesite. Near amado- rose. so 3 Cl 0.22 0.25 Q 22.1 or 10.0 ab 35.1 an 20.3 C 2.6 hy 5.0 mt 2.1 il 1.4 Clear Creek, Shasta County, California. J. E. Whit¬ field. J. P. Iddings, B. U. S. G. S. 150, p. 236, 1898. Dacite- porphyry. SO s for S. Cl high? t SrO LioO 0.03 trace Q 18.7 or 11.7 ab 34.6 an 22.2 di 2.0 hy 6.2 nit 3.0 il 0.8 Head of Mill Creek, Shasta County, California. W. F. Hille- brand. J. S. Diller, B. U. S. G. S. 148, p. 194, 1897. Dacite? Dried at 110°. Near tona¬ lose. SrO LioO trace’ trace Q 25.3 or 13.9 ab 31.4 an 19.7 di 0.5 hy 4.5 mt 2.8 il 0.8 Mount Ingalls, Plumas County, California. W. F. Hille- brand. H. W. Turner. 17 A. R. U.'S. G. S., I, p. 724, 1896. Granodiorite. Also in J. G., Ill, p. 403, 1895. SrO LioO 0.05 trace Q 24.0 or 10.0 ab 33.0 an 22.2 di 1.5 hy 6.1 mt 2.1 il 0.6 Near Goodyear’s Bar, Sierra County, Cal¬ ifornia. W. F. Hille- brand. H. W. Turner, 17 A. R. U. S. G. S., I, p. 731, 1896. Hypersthene- andesite. Also in J. G,, III, p. 407, 1895. SrO Li..O trace trace Q, 21.3 or 10.0 ab 38.8 an 22.0 hy 4.9 mt 1.4 il 0.6 Indian Valley, Sierra County, Cal¬ ifornia. W. F. Hille- brand. H. W. Turner, 17 A. R. IT. S. G. S., I, p. 724, 1896. Quartz-diorite- porphyry. Also in J. G., Ill, p. 403, 1895. . FeSo SrO Li..,0 0.02 trace trace Q 24.0 or 16.1 ab 27.8 an 21.1 di 1.0 hy 6.4 mt 2.1 il 0.8 Near Nevada City, Nevada County, California. W. F. Hille- brand. W. Lindgren, .17 A. R. U. S. G. S., II, p. 38, 1896. Granodiorite. NiO 0.20 Q 22.8 or 16.7 ab 30.9 an 19.5 C 0.9 hy 3.7 mt 1.6 il 1.5 hm 1.3 Clear Lake, Califor¬ nia. W. H. Mel¬ ville. G. F. Becker, M. U. S. G. S., XIII, p. 154, 1888. Andesite. Q 33.3 or 15.6 ab 28.8 an 14.7 hy 4.6 mt 0.7 ap 0.4 Carmelo Bay, Cal¬ ifornia. J. Posada. A. C. Lawson, B. G. Dep. Un. Cal., I, p. 16, 1893. Granite. Q 22.6 or 8.9 ab 33.5 an 23.1 hy 8.8 mt 3.0 Cerro de Tlapacoya, Lake Chaleo, Mexico. A. Rohrig. H. Lenk, Btr. G. Mex., II, p. 233, 1899. Hornblende- andesite. Q 24.7 or 13.9 ab 28.3 an 21.4 C 0.2 hy 4.6 mt 2.8 hml.3 Ferreria San Esteban, Oaxaca, Mexico. A. Rohrig. H. Lenk, Btr. G. Mex., II, p. 132, 1899. Trachyte. 190 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS I. PERSALANE-*-Continued. RANG 3. ALKALICALCIC. COLORAI)ASE—Continued. No. Si0 2 A1A Fe.A FeO MgO CaO Na. 2 0 k 2 o h 2 o+ H 2 0- co 2 Ti0 2 o P-T MnO BaO Sum Sp. gr. 39 65. 03 18. 83 2.35 n. d. 2. 06 4. 43 4. 38 2.24 1.00 100. 32 2. 589 A4. IV 1.084 .185 .015 (.030) .052 .078 .071 .023 40 69.90 14.16 2. 98 1.08 1.38 4. 30 3. 20 1.95 1.08 0. 83 trace 100. 86 B2. Ill 1.165 .139 .019 .015 .035 .077 .051 .021 .010 —- 41 68. 20 15.83 2. 86 0. 51 2.14 3. 49 3. 07 2. 88 0. 50 — 0. 06 0. 46 o. or 0. 08 100.10 Al. I 1.137 . 155 .018 .007 .054 .062 .050 .030 .006 — .001 42 67.40 19. 06 0. 71 1.31 1.90 4.30 3.16 1.52 0.30 — 0. 32 0.34 0. 02 0.06 100. 40 A2. II 1.123 .187 .004 .018 .048 .077 .051 .016 .004 — .001 43 65. 88 15. 61 2,42 2. 71 1. 76 3. 70 3. 92 2. 29 1.05 — trace 0.43 0.13 0. 08 none 100. 00 Al. I 1.098 .153 .015 .038 .044 .066 .063 .024 .005 .001 .001 44 62. 95 20. 81 1.73 0.39 2. 66 3. 75 4.15 3.46 0. 20 — 0. 02 trace 0.09 none 100.22 A2. II 1.049 .204 .011 .005 .067 .067 .067 .037 — .001 — 45 68. 41 16. 08 2.12 1.44 1.14 3. 52 4. 52 2. 24 0. 33 99. 84 A3. Ill 1.140 .157 .013 .020 .029 . 062 .072 .023 46 67. 30 17.55 1.47 1.67 1.04 3. 48 3. 90 2.13 0. 80 .013 99.47 A3. Ill 1.122 .172 .009 .024 .026 .062 .063 .022 .001 47 63.19 18. 65 4.01 1.89 1.30 4. 86 3. 69 1.95 0. 07 0.18 0. 25 0.13 100. 07 A2. II 1.053 .182 .025 .027 .030 .088 .059 .021 .002 .002 .002 48 63.18 19.79 1.10 3. 23 1.51 4. 04 5.12 2.42 0. 62 101.01 B3. IV 1.053 .194 .007 .044 .035 .072 .082 .026 49 70. 33 15. 59 3.05 n. d. 1.30 3.05 4. 50 1.29 n. d. 1.09 100. 20 A3. Ill 1.172 .153 .020 (.040) .033 .055 .072 .014 .013 50 61.93 18. 83 3. 24 1.24 2. 37 4. 46 4.16 2. 72 1.83 * 100. 78 2. 62 A3. Ill 1.032 .184 .020 .017 .059 .080 .068 .028 51 59. 44 18. 97 5. 25 1.72 0. 85 6. 85 3. 08 2. 46 1.22 99. 84 2. 65 A3. Ill .991 .186 .033 .024 .021 .122 .050 .026 52 63. 62 17. 72 3. 24 3. 40 1.49 4. 83 2. 29 1.99 1.09 99. 67 A3. Ill 1.060 .174 .020 .048 .037 .086 .037 .021 53 67. 34 15. 96 3.38 0. 80 0. 88 2.98 4. 12 1. 66 2. 20 0.56 99. 78 2.462 A3. Ill 1.122 .156 .021 .011 .022 .053 .066 .018 .007 54 64. 83 17.60 4. 95 1.82 1.61 5. 26 2. 52 1.53 0. 20 0.08 100.40 2.539 A3. Ill 1.081 .172 .031 .025 . 040 .094 .041 .017 .001 55 62. 90 18. 29 1.79 4. 00 1.61 5. 62 2. 91 1.48 0. 98 0.18 99. 77 2. 464 A3. Ill 1.048 .179 .012 .056 .040 .100 .047 .016 .002 PERSALANE-YELLOWSTONOSE. 191 ORDER 4. QUARDOFELIC. BRITANNARE—Continued. SUBRANG 4. DOSODIC. YELLOWSTONOSE—Continued. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. Q 16.9 or 12.8 ab 37.2 an 21.7 C 1.3 hy 9.1 Nevado de Toluca, Mexico. A. Lagorio. A. Lagorio, T. M. P. M., VIII, p. 458, 1887. Andesite. Q 33.2 or 11.7 ab 26.7 an 18.6 di 2.2 hy 2.5 nit 1.2 il 1.5 hm 2.2 Serro Colorado, Aruba Island, West Indies. Perlstein. J. H. Kloos, Samml. G. R. Mus., Leiden, I, p. 19, 1887. Quartz-diorite. FeS.. 0.01 Q 28.7 or 16. 7 ab 26.2 an 17.2 C 1.3 hy 5.4 mt 0.5 il 0.8 hm 2.5 Average Sample, Es- sequibo River, Brit¬ ish Guiana. J. B. Harrison. J. B. Harrison, Rep. G. Esseq. R., p. 42, 1900. Hornblende- granite. Dried at 100°. Near amiatose. Aik. corr. Priv. contrib. J.B. H. FeS.. CuS' trace trace Q 30.5 or 8.9 ab 26.7 an 21.4 C 4.4 hy 6.1 mt 0.9 il 0.6 Average Sample, Es- sequibo River, Brit¬ ish Guiana. J. B. Harrison. J. B. Harrison, Rep. G. Esseq. R., p. 34, 1900. Granitite- gneiss. Dried at 100°. ZrO.' Cl FeS, CoO CuO trace 0.02 trace none trace Q 22.9 or 13.3 ab 33.0 an 18.3 hy 6.8 mt 3.5 il 0.8 Mazaruni District, British Guiana. J. B. Harrison. J. B. Harrison, Private contribution. Granitite. Dried at 100°. Q 13.4 or 20.6 ab 35.1 an 18.6 C 3.4 hy 6.7 mt 1.2 hml.O Sericambra, Derne- rara, British Guiana. J. B. Harrison. J. B. Harrison, Rep. G. Esseq. R., p. 44, 1900. Syenite. Dried at 100°. Aik. corr. Priv. contrib.J.B.H. Q 24.6 or 12.8 ab 37.7 an 17.4 hy 3.8 mt 3.0 Paramo, Azufral de Tuquerres, Colom¬ bia. R. Kiich. R. Kiich, G. Stud. Colomb., I, p. 155, 1892. Biotite-horn- blende-daeite. Q 26.8 or 12.2 ab 33.0 an 17.2 C 2.6 hy 4.6 mt 2.1 Paramo, Azufral de Tuquerres, Colom¬ bia. R. Kiich. R. Kiich, G. Stud. Colomb., I, p. 155, 1892. Biotite-horn- blende-dacite. Q 22.0 or 11.7 ab 30.9 an 24.5 C 1.4 hy 3.0 mt 5.8 il 0.3 Mte. Tajumbina, Peru. C. Hoepfner. C. Hoepfner, In. Diss. Halle, p. 32, 1881. Dacite. Q 11.3 or 13.5 ab 43.0 an 20.0 C 1.4 hy 8.5 nit 1.6 Gualilan, San Juan Province, Argen¬ tina. B. Wetzig. A. Stelzner, Btr. G. Arg. Rep., I, p. 186, 1885. Dacite. Sum high. Q 29.2 or 7.8 ab 37.7 an 15.3 C 1.2 hy 6.8 il 2.0 Farsund, n. Lister, Norway. C. F. Kolderup. C. F. Kolderup, Berg. Mus. Aarb., 1896, p.113. Hypersthene- adamellite. Q 14.2 or 15.6 ab 35.6 an 22.2 C 0.8 hy 5.9 mt 4.5 Kesselsdorf, Saxony. W. Bruhns. W. Bruhns, Z.D.G.G., XXXVI11, p. 750, 1886. Feldspar-por- phyrite. Q 16.9 or 14.5 ab 26.2 an 30.6 di 2.6 hv 0.9 mt 7.0 Kaut'bach, Saxony. W. Bruhns. W. Bruhns, Z.D.G.G., XXXVIII, p. 754, 1886. Augite-porphy- rite. Q 28.5 or 11.7 ab 19.4 an 23.9 C 3.1 hy 7.3 mt 4.6 Mte. Colmo, Adam- ello, Tyrol. C. Riva. C. Riva, cf. N. J., 1897, II, p. 65. Quartz-mica- porphyrite.J Q 29.4 or 10.0 ab 34.6 an 14.7 C 1.9 hy 2.0 mt 0.9 il 1.1 hm 2.7 Kolantziki, Megara, Greece. A. Rbhrig. H. S. Washington, J. G., Ill, p. 150, 1895. Biotite-dacite. Q 30.3 1 or 9.5 ub 21.5 ! an 26.1 C 2.0 hy 4.0 mt 6.8 Panagia, Methana, Greece. A. Rohrig. H. S. Washington J. G., Ill, p. 150, 1895. Hornblende- hypersthene- dacite. Near kadiak- ose. Cl 0.01 Q 23.2 or 8.9 ab 24.6 j an 27.8 C 1.6 hy 9.8 mt 2.0 Kosona, Methana, Greece. A. Rohrig. H. S. Washington, J. G., Ill, p. 150, 1895. Hornblende- hype rsthene- dacite. Near kadiak- ose. 192 CHEMICAL ANALYSE* <>E IGNEOUS ROCKS. GLASS I. PERSALANE—Continued. RANG 3. ALKALICALCIC. COLORADASE—Continued. No. Si0 2 aia LeA FeO AlgO CaO Na 2 0 K,0 H,0+ H 2 0— C0 2 Ti0 2 PA MnO BaO Sum Sp. gr. 56 59. 93 16. 99 3. 58 1. 28 1. 51 5.92 3.23 1. 55 4.28 0.96 99. 23 2. 327 B3. IV .992 . 166 .022 .018 .037 .106 .052 .017 .012 99. 72 57 66.18 18. 71 1.49 2.00 0. 87 3. 28 3.63 2. 84 0. 72 (98.29) A3. III? 1.103 .183 .009 .028 . 022 .059 .058 .030 58 68. 51 15. 96 .2. 61 1.09 1.07 3.14 4. 01 1.82 n. d. 0.82 0. 28 100. 65 2. 329' A2. II 1.142 .156 .016 .015 .027 . 056 .064 .020 .010 .004 59 67. 56 16. 39 1.25 1. 86 1.48 5.08 3. 54 1.77 n. d. 0.17 0. 79 99. 89 2. 678 A3. III 1.126 .160 .008 .026 .037 .091 . 057 .020 1 .011 i 21° RANG 3. ALKALICALCIC. COLORADASE. i 69. 66 17. 57 0. 21 1.04 0. 58 4. 54 4. 91 0. 71 0. 50 0. 05 none 0.21 0.03 trace 0. 03 100. 09 Al. I 1.161 .172 .001 .014 .015 .081 .079 .007 .003 — — •— 2 70. 96 16. 64 0. 22 1.48 1.29 3.46 4.59 0. 24 0. 68 0.42 0. 38 0. 01 0. 10 100.47 2. 737 A2. II 1.178 .163 .001 .021 .032 .061 .074 .002 .005 — .001 3 69. 34 17. 25 2. 46 n. d. 1.18 3. 43 4. 33 0.71 1.17 99.87 A4. IV 1.156 .169 .015 (.030) .030 .060 .069 .007 4 66.97 17. 20 3. 27 1.26 2. 08 3.94 5.48 0. 69 0. 11 1 101.00 2. 76 B3. IV 1.116 .169 .020 .018 .052 .070 .098 .007 RANG 4. DOCALCIC. i 63. 77 19.13 1. 66 1.15 4. 29 5. 63 2. 20 0. 99 0. 60 0.14 0.17 0.02 0. 20 99. 95 A2. II 1.063 .187 .010 .017 .107 .101 .035 .010 .002 — .003 2 63. 09 18. 89 3. 48 2.02 1.97 6.18 3.14 1.30 0. 63 # 100. 70 A3. Ill 1.052 .185 .022 .028 .049 .110 .051 .015 CLASS I. PERSALANE. RANG 1. PERALKALIC. NORDMARKASE. 1 65.43 16.11 1.15 2. 85 0.40 1.49 5.00 5.97 0. 39 0.19 trace? 0.50 0.13 0. 23 0. 03 100.18 Al. I 1.091 .158 .009 .039 .010 .027 .081 .064 .006 .001 .003 — 2 64. 88 16. 24 1.37 2. 70 0. 89 1.92 5. 00 5.61 0.46 0.19 none 0. 69 0.13 0.14 0. 06 100.53 Al. I 1.081 .159 .008 .038 .022 .034 .081 .060 .008 .001 .002 — 3 63. 71 18.30 2.08 2. 52 0. 09 1. 18 6.39 6.21 0.17 0. 09 trace trace 100. 74 A3. Ill 1.062 .180 .013 .035 .002 .021 .103 .065 _ — 4 61.05 18.81 2. 02 3. 06 0. 42 1.30 6. 56 6. 02 0. 78 0. 34 trace none 100.04 2. 655 A2. II 1.018 .183 .013 .043 .011 .023 .106 .064 .004 — — 12° PERSALANE-PHLEGROSE. 193 ORDER 4. QUARDOFELIC. BRITANNARE—Continued. SUBRaNG 4. DOSODIC. YELLOWSTONOSE—Continued. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. Cl 0.01 Q 20.3 or 9.5 ab 27.2 an 27.0 di 2.0 hy 2.8 mt 1.4 il 1.7 hm2.5 Spasmeno Vouno, Aegina, Greece. A. Rohrig. H. S. Washington, J. G., Ill, p. 150, 1895. Hornblende- andesite. Not fresh. • Q 25.0 or 16.7 ab 30.4 ail 16.4 C 3.7 hy 4.8 mt 2.1 Kalko, n. Bio, Cau¬ casus Mountains. Makerow. Loewinson-Lessing, cf. N. J., 1899, II, p. 237. Dacite. Sum incorrectly given. Sol. salts 1.34 Q 29.9 or 11.1 ab 33.5 an 15.6 C 1.6 hy 2.7 mt 1.2 il 1.5 hm 1.7 Eruption of 1883, Krakatoa. C. Winkler. R. D. M. Verbeek, Krakatau, p. 292, 1884. Andesite-pum¬ ice. Q 26.1 or 11.1 ab 29.9 an 23.1 di 1.9 hy 5.2 mt 1.9 Moruva, New South Wales. A. Liversidge. A. Liversidge, J. R. Soc. N. S. W., XVI, p. 42, 1883. Granite. SUBRANG 5. PERSODIC. AMADOROSE. FeS 2 trace? Q 27.3 hy 3.3 Tuolumne River, W. F. Hi lie- H. W. Turner, Quartz-diorite- NiO none SrO 0.05 or 3. 9 mt 0.2 ab41.4 il 0.5 Amador County, brand. 17 A. IL P.S.G.S., I, aplite. Li.,0 none an 22.5 California. 702, 1896. C 0.5 S trace Q. 32.6 hy 5.2 Average sample, J. B. Harrison. J. B. Harrison, Porphyrite. Dried at 110°. or 1.1 mt 0.2 ab38.8 il 0.8 Potaro River, Brit- Rep. G. Esseq. River, an 17.0 ish Guiana. p. 52, 1900. C 2.6 Q 31.2 hy 5.2 Saganaga Lake, Min- A. D. Meeds. V. S. Grant, 21 A. R. Granite. or 3.9 ab 36.2 nesota. G. Nh. S. Minn., an 16.7 p. 43, 1893. C 6.4 Q 18.0 di 1.2 Cristallina Thai, St. Grubenmann U. G. Grubenmann, Granite. or 3.9 hy 4.6 ab 51.4 mt 4.6 Gotthard, Switzer- and Ander- Mt.Thurg. Nf. Ges., X, an 17.8 land. wert. p. 17, 1892. SUBRANG 3. TRESODIC. FeS 2 trace CuS 2 trace Q, 28.6 or 6.1 ab 18.3 an 28.1 C 4.1 hyll.O mt 2.3 Essequibo River, British Guiana. • J. B. Harrison. J. B. Harrison, Rep. G. Ess. River, p. 34, 1900. Hornblende- granitite- gneiss. Dried at 110°. Near bandose. Q 22.9 or 8.3 ab 26.7 an 30.6 C 0.9 hy 5.8 mt 5.1 Wistra, Carinthia, Austria. H. Krczmar. • F. B6cke. T. M. P. M., XVIII, p. 94, 1899. Tonalite-gneiss. ORDER 5. PERFELIC. CANADARE. SUBRANG 3. SODIPOTASSIC. PHLEGROSE. ZrO.> Cl F FeS 2 0.11 0.05 0.08 0.07 Q 8.8 or 35.6 ab 42.4 an 3.6 di 3.4 hy 2. 4 mt 2.1 il 0.9 Mount Aseutney, Vermont. W. F. Hille- brand. ZrO> Cl F FeSo NiO 0.13 0.04 0.08 none none Q 8.3 or 33. 4 ab 42.4 an 5.0 di 3.7 hy 3.2 mt 2.6 il 1.2 Mount Ascutnev, Vermont. W. F. Hille- brand. Q 0.4 or 36.1 ab 54.0 an 3.3 di 1.2 hy 2.0 mt 3.0 Salem Neck, Essex County, Massachu¬ setts. H. S. Washing- ton. or 35.6 ab 47.2 an 3.6 ne 4.5 di 2.4 ol 3.0 mt 3.0 Coney Island, Salem Harbor, Massachu¬ setts. H. S. Washing¬ ton. R. A. Daly, B. U. S. G. S., 148, p. 68, 1897. R. A. Dalv, B. IJ. S. G. S., 148, p 69, 1897. H. S. Washington, J. G., VI, p. 806, 1898. II. S. Washington, J. G., VII, p. 118, 1899. 14128 — No. 14—03 - 13 Syenite. Syenite-po r- phyry. H e d r u m i t i c pulaskite. Sblvsbergite. Dried at 110°. Near nordmark- ose. Cf.No. 3. 194 CHEMICAL ANALYSES OF IGNEOUS ROCKS, CLASS I. PERSALAXE—Continued. RANG 1. PERALKALIC. NORDMARKASE—Continued. No. Si0 2 Al-iOj Fe 2 O s FeO MgO CaO Xa 2 <) k 2 o II,0+ H,0— co 2 TiO a p 2 o 5 MnO BaO Sum Sp. gr. 5 60.13 20. 05 2.36 1.33 0. 76 0. 87 6. 30 5.97 1.41 0.16 none 1.15 0. 06 trace 100. 72 A1 I 1.002 .196 .015 .018 .019 .016 .101 . 064 .014 — — 6 59. 70 18. 85 4. 85 n. d. 0. 68 1.34 6. 29 5. 97 1.88 99. 56 A4 IV .995 .185 .030 (.060) .017 .024 .101 .064 7 66. 03 18.49 2.18 0. 22 0. 39 0. 96 5.22 5.86 0. 85 trace 0. 04 trace 100. 24 A3. Ill 1.101 .181 .014 .003 .010 .017 .084 .063 — — 8 66.55 16.35 4. 00 n. d. 0. 38 1.34 5.40 4.97 0. 40 0. 66 100. 05 A3 III 1.109 . 160 . 025 (.050) .010 .024 .087 .054 .008 9 68.01 17.48 0. 41 n. d. .046 trace 5. 77 7.08 0. 73 ft 99. 94 2.60 A3. Ill 1.134 .171 .003 (. 006) .012 — .093 .075 10 66.13 17. 40 2.19 n. d. 0. 04 0.81 5. 28 5. 60 1.22 0. 74 0.13 99. 54 A3 III 1.102 171 .014 (.028) .001 .014 .085 .060 .009 .002 11 64. 04 ft 17.92 0. 96 2. 08 0.59 1.00 6. 67 6. 08 1. 18 0. 62 0. 23 101.37 2.646 B2 III 1.067 . 176 .006 .029 .015 .018 .108 . 065 .008 .003 12 62. 30 17. 05 1.30 0. 57 1.20 5. 14 6.18 0. 45 2. 65 trace trace 99. 73 A3. Ill 1,038 .167 .008 .034 .014 .021 .083 .066 — 13 59. 24 18. 97 ‘4 *>n 1.2Q 0.12 2. 06 4.87 9.14 0. 86 0. 47 100.34 2. 509 .021 2.36 trace A2. 11 14 .987 61.62 .186 18. 24 .017 1.28 .003 0. 56 . 037 1.44 .079 5. 77 .099 7. 60 0. 78 .006 0. 87 100. 67 .03 A2 II 15 1.027 61.88 .179 18. 21 .015 2.19 .018 1.38 .014 0. 61 .026 1.15 . 093 6. 89 . 081 • 6. 72 0. 37 .011 0. 69 trace 100.64 100. 39 .07 A 2. II 16 1.031 60. 33 .178 18. 74 .014 2.84 .019 1. 29 .015 0. 38 . 021 1.15 .ill 7. 15 .071 7. 30 0. 56 .009 trace trace 100.32 100.17 .11 A3. Ill 1.006 .184 .018 .018 .010 .021 .115 .078 * — — 100.06 17 59. 79 19. 71 2.95 1.08 0.36 1.19 6. 79 7. 10 0. 24 trace trace 99. 74 . 13 A3. Ill .997 .193 .018 .015 .009 .021 .110 .076 — " — 99.61 18 61. 22 18.01 1.32 4.51 0. 44 1.88 6. 49 5. 93 0. 46 .042 trace 100. 68 2. 210 A2. 11 1.020 .177 .008 .063 .011 .034 .105 .063 .005 — RANG 1. PERALKALIC NORDMARKASE. t 1 60.39 22. 57 0. 42 2. 26 0.13 0. 32 8. 44 4.77 0.57 trace 0. 08 99. 95 A3. Ill 1.007 .221 .003 .031 .003 .006 .136 .051 .001 o 63.09 18. 44 2.90 1.36 0.16 1.00 7. 25 5. 23 0. 62 0. 21 0.45 trace 100. 77 A2. II 1.052 .180 .018 .019 .004 .018 .117 .056 .006 — 3 60. 60 18. 28 2. 85 2. 67 0. 52 0. 99 6. 66 5. 73 0. 69 0. 71 0.15 99.85 A 2. II 1.010 179 .018 .037 .013 .018 .107 .061 .009 .001 / PERSALANE—NORDMAKKOSE. 195 ORDER 5. PERFELIC. CANADA RE—Continued. SUBRANG 3. SODIPOTASSIC. PHLEGROSE—Continued. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. ZrO 2 so 3 0.05 0.14 or 35.6 ill) 40.3 an 4.4 ne 2. 0 C 1.5 ol 1.4 nit 0.9 il 2.2 hm 1.8 Braddock’s Quarry, Fourche Mountains, Arkansas. H. S. Washing¬ ton. II. S. Washington, .1. G., IX, p. 610, 1901. Foyaite. Cf. No. 6. or 35.6 ab 12.4 an 5.3 ne 5.7 di 1.3 ol 6.9 Braddock’s Quarry, Fourche Mountains, Arkansas. W. A. Noyes. .1. F. Williams, A. R. (i. S., Ark., 1890, II, p. 81, 1891. Nephelite-sven- ite. Ci. No. 5. \ Q 10.5 or 35.0 ab 44.0 an 4.7 C 1.7 hy 1.0 nit 0.7 hm 1. 8 Game Ridge, Rosita Hills, Colorado. L. G. Eakins. A*. Cross, 17 A. R. U. S.G.S., II, p. 824, 1896. Trachyte. Also in Pr. Col. Sc. Soe., II, p. 237, 1887. Q* 10.1 or 30.0 ab 45.6 an 4.2 di 1.6 hv 5.9 il 1.2 Hvitus Ivridhur, Sniiffelsjokull, Iceland. Backs trbm. 11. Bilckstrom. G. F. F., XIII, p. 659, 1891. Liparite. Near pulaskose. Q 6.5 or 41.7 ab 48. 7 C 0.3 hy 2.1 Good wick, Pembrokeshire, Wales. F. PI. Tadman. F. IL C. Reed G.J. G. S., i Lp. 177, 1895. Felsite. Q 11.5 or 33.4 ab 44.5 an 2.8 C 1.6 hv 2.7 il* 1.4 Between Thinghoud and Fjelebua, Nor¬ way. R. Mauzelius. W. C. Bbigger, Z. K., XVI, p. 46, 1890. Akerite. or 36.1 ab 54.5 an 0.8 ne 1.1 di 3.6 ol 1.4 nit 1.4 il 1.2 Tonsenas, n. Chris¬ tiania, Norway. P. Jannasch. O. Lang, Nyt. Mag., XXX, p. 40, 1886. Nordmarkite. Also in W. C. Brogger, Z. K.,XVI,p.56, 1890. Sum high. FeS 2 0.43 Q. 3.9 or 36.7 ab 43.5 an 5.0 di 0. S hy 4.5 mt 1.9 Gjefsen, Gran, Nor¬ way. L. Schmelck. IV. C. Brogger, Eg. Kg. I, p. 131, 1894. Bostonite. • Not fresh. S0 3 0.10 or 55.0 ab 25.7 a*i 2.2 ne 8.5 di 0.7 wo 3.1 mt 2.6 il 0.9 hm 1.6 West of Viterbo, Italy. H. S. Washing¬ ton. PI. S. Washington, J. G., IV, p. 849,1896. Phonolite. Dried at 110°. Block in tuff. Cl 0.15 or 45.0 ab 41.0 an 1.4 ne 4.3 di 3.1 wo 0.8 mt 1.9 il 1.5 hm 1.1 Monte Rotaro, Ischia, Italy. H. S. "Washing¬ ton. II. S. Washington, A. J. S., VIII, p. 289, 1899. Trachyte. Dried at 110°. Cl 0.30 or 39.5 ab45.6 ne 1.4 so 3.9 ac 1.4 di 3.3 wo 0.8 mt 2.6 il 1.4 Marecocco, Ischia, Italy. PI. S. Washing¬ ton. PI. S. Washington, A. J. S.. VIII, p. 289, 1899. Trachyte. Dried at 110°. Cl 0-43 or 43.4 ab 36.7 ne 5.1 so 5.9 ac 1.4 di 3.0 wo 1.0 mt 3. 5 Monte Nuovo, Phlegrean Fields, Italy. H. S. Washing¬ ton. IP. S. Washington, A. J. S., VIII, p. 287, 1899. Trachyte. Dried at 110°. Cl 0.53 or 42.3 ab37. 7 an 5.8 ne 2. 8 so 6.8 ol 0.7 mt 4.1 Monte di Cuma, Phlegrean Fields, Italy. H. S. Washing¬ ton. H. S. Washington, A. J. S., VIII, p. 287, 1899. Trachyte. Dried at 110°. or 35.0 ab 45.6 an 2.5 ne 5.1 di 6.1 ol 3.7 mt 2.6 Gough’s Island, South Atlantic. L. V. Pirsson. ’ L. V. Pirsson, A. J. S., XLV, p. 382, 1893. Trachyte- obsidian. Near nordmark- ose. Almost in germanare. * SUBRANG 4. DOSODIC. NORDMAKKOSE. or 28.4 ab 52.4 an 1. 7 ne 10. 2 C 2.9 ol 3.1 mt 0.7 Litchfield, Maine. L. G. Eakins. W. S. Bayley, B. G. S. A.', Ill, p. 241, 1892. Litchfieldite. Zr0 2 0.06 or 31.1 ab 59.2 an 2.0 ne 1.1 di 1.0 wo 0.8 mt 3. O il 0.9 hm 0.8 Salem Neck, Essex County, Massachu¬ setts. II. S. Washing¬ ton. H. S. Washington, J.G., VI. p.806,1898. Pulaskite. or 33.9 ab 50. 3 an 3.3 ne 3.1 di 1.4 ol 1.4 mt 4.2 il 1.4 Coney Island, Salem Harbor, Massachu¬ setts. M. Dittrich. II. Rosenbusch, Elemente, p.199,1898. Syenite-por¬ phyry. Solvsbergite. Cf. No. 4. 196 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS I. PERSALANE—Continued. RANG 1. PERALKALIC. NORDMARKASE—Continued. No. Si0 2 A1A Fe 2 0 3 FeO MgO CaO • Na 2 0 K 2 0 h 2 0+ H 2 0- co 2 Ti0 2 PA MnO BaO Sum Sp. gr. 4 60. 05 19.97 4. 32 1.04 0. 23 0.91 7. 69 3.24 1.26 0.15 0.11 0. 79 100. 04 2. 708 A2. II 1.001 .196 .027 .014 .005 .016 123 .034 .001 .011 5 59. 31 22. 50 1.93 1.40 0.17 0. 46 7.98 4. 08 1.12 0.15 0. 32 trace 99.42 2. 599 B2. Ill .989 .221 .012 .019 .004 .008 .129 .043 .004 — 12° 6 59. 62 18. 67 5.07 n.d. 0. 84 1.80 6.95 5. 65 • 0. 80 99. 40 B4. V .994 .185 .032 (.064) .021 .032 .112 .061 7 67. 77 17.57 n.d. 1.59 0. 49 0.51 6. 20 4. 56 1.47 0. 73 100. 89 B4. V 1.130 .172 — .022 .012 .009 . 100 .049 ' 8 61.08 18. 71 1.91 0. 63 0. 08 1.58 8. 68 4. 63 2.21 0.18 n. d. trace 0. 05 99. 86 2. 582 Al. I 1.018 .185 .012 .009 .002 .028 .140 .049 .002 — — 9 66. 22 16. 22 1.98 0.16 0. 77 1.32 6. 49 5. 76 0. 24 0. 08 0. 22 0.10 trace 0. 29 99. 97 Al. I 1.104 .159 .012 .002 .019 .023 .105 .061 .003 .001 — .002 10 64. 33 17. 52 3. 06 0.94 0. 34 0. 56 7.30 4.28 0. 95 0.04 trace trace 0. 35 99. 67 A3. Ill 1.072 .172 .019 .013 .009 .010 .117 .046 - . .005 n 62. 17 18. 58 2.15 1.05 0. 73 1.57 7.56 3. 88 1.63 0. 07 trace 0.11 trac 99. 50 A3. Ill 1.036 .182 .013 .015 .018 .028 .122 .041 _ .001 — 12 63. 24 17. 98 2. 67 0. 85 0. 63 0. 93 6. 27 5. 47 0. 80 0. 37 none 0.38 0.22 0. 04 0. 25 100.14 Al. I 1.054 .176 .017 .012 .016 .016 .101 .059 .005 .002 .001 .002 13 65. 51 16. 89 1.41 2. 52 0.39 1.19 6. 42 5.02 0.16 0. 92 0.07 0.31 100. 81 A2. II 1.092 .165 ' .009 .035 .010 .021 . 103 .054 .011 — .004 14 66. 50 16. 25 2.04 0.19 0.18 0. 85 7.52 5. 53 0. 50 0. 70 trace 0.20 100. 46 A2. II 1.108 .159 .013 .003 .005 .015 121 059 .009 — .003 15 64. 92 16. 30 3. 62 0. 84 0. 22 1.20 6. 62 4. 98 0. 50 0. 40 99. 60 A3. Ill 1.082 .160 .023 .012 .006 .021 .107 053 .006 16 64. 54 18.13 2. 63 0. 97 0. 67 0. 62 6. 60 5. 99 0.31 trace trace trace 0.42 100. 88 A3. Ill 1.076 .178 .016 .013 .017 .011 107 064 — — — .003 17 63. 20 17. 45 3.60 n. d. 0. 75 1.40 6. 90 5. 88 0. 50 0. 46 100.14 A3. Ill 1.053 .171 .022 (.038) .019 .025 .ill . 063 .006 18 60.11 19. 01 4. 63 0.37 0. 23 0. 66 6.53 5. 36 1.37 0.84 0.96 trace 100. 07 A 2. 11 1.002 .186 .029 .005 .006 .012 .105 .057 .012 — 19 63. 76 17.37 0. 10 1. 11 0. 93 1. 72 6. 69 5.97 0. 40 none 0. 70 0.16 0. 37 99.28 B2 III 1.063 .170 .001 .015 .023 .030 .108 .064 .009 .001 .005 20 63. 61 16. 34 4.30 2. 08 0. 37 1.42 6. 21 5. 54 0. 77 trace 100. 82 A3. Ill 1.060 .160 .027 .030 .009 .025 .100 . 059 — 21 62. 04 17.44 4. 22 0.36 1.88 0.57 6. 31 4. 20 1.63 0. 71 0. 37 99. 85 2. 620 A2. II 1.034 .171 .026 .005 .047 .010 .101 .045 .009 .002 22 63. 74 17. 86 4. 27 0. 30 0. 10 0. 83 7.23 5. 19 0. 83 trace 0.19 100. 54 A3. Ill 1.062 .175 .027 .004 .003 .015 .117 .056 — .003 PERSALANE-NORDMARKOSE. W ORDER 5. PERFELIC. CANA DARE—Continued. SUBRANG 4 DOSODIC. NORDMARKOSE—Continued. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. Cl 0.28 Q 1.3 or 18.9 ati (i t. 5 an 4.4 C 2.3 hy 0.6 mt 3.2 hm 2.0 .Gale’s Point, Essex County, Massachu¬ setts. A. S. Eakle. A. S. Eakle, A. J. S., VI, p. 491, 1898. Biotite-tingua- ite. Not fresh. or 23.9 ab 59.2 an 2.2 C 4.2 ol 1.1 mt 2.8 il 0.6 Great Haste Island, Salem Harbor, Massachusetts. H. S. Washing¬ ton. H. S. Washington, J.G.,VI, p. 803,1898. Foyaite. • or 33.9 ab 40.3 an 3.3 ne 9.9 di 4.6 ol 6.3 Saline County, Arkansas. W. A. Noyes. J. F. Williams, A. R. G. S., Ark., 1890, 11,135,1891. Nephelite-syen- ite. Q 11.0 or 27.2 ab 52.4 an 2.5 C 1.4 hy 4.1 Ulster Mine, Preston, Black Hills, South Dakota. Flintermann. J. D. Irving, A. N. Y. Ac. Sc., XII, p. 277,1899. Quartz-por¬ phyry. Cl 0.12 or 27.2 ab 54.0 an 1.1 ne 10.5 di 0.4 wo 2.5 mt 2.1 il 0.3 Devil’s Tower, Black Hills, South Dakota. L. V. Pirsson. L. V. Pirsson, A. J. S., XLVII, p. 344, 1894. Phonolite. so 3 Cl F SrO Li 2 0 0.02 0.04 trace 0.06 trace Q 5.3 or 33.9 ab 51. 9 ac 2.8 di 1.4 wo 1.6 il 0.3 hm 1.0 Gray Butte, Bearpaw Mountains, Mon¬ tana. PI. N. Stokes. Weed and Pirsson, A. J. S., I, p. 295, 1896. Quartz-syenite- porphyry. Q 3.9 or 25.6 ab 61.3 an 2.8 hy 0.9 mt 3.0 hm 1.0 Sixteen-mile Creek, Crazy Mountains, Montana. W. H. Melville. Wolff and Tarr, B. M. C. Z., XVI, p. 232, 1893. A cmite-tra¬ chyte. Q 0.6 or 22.8 ab 63.8 an 5.3 di 2.0 hy 1.1 mt 3.2 North part of Crazy Mountains, Mon¬ tana. W. H. Melville. Wolff and Tarr, B. M. C. Z., XVI, p. 232, 1893. Acmite-tra- chyte. ZrOo S Cr 2 0 3 v«o 3 SrO trace trace none 0.01 0.03 Q 2.8 or 32.8 ab 52.9 an 4.4 hy 1.6 mt 1.6 il 0.8 hm 1.6 Dike Mountain, Yel¬ lowstone National Park. W. F. Hille- brand. Hague and Jaggar, B. U. S. G. S., 168, p. 98, 1900. Biotite-tra- chyte. • Q 5.8 or 30.0 ab 54.0 an 2.2 di 3.6 hy 1.6 mt 2.1 il 1.7 San Mateo Mountain, Mount Taylor re¬ gion, New Mexico. T. M. Chatard. J. S. Diller, B. U. S. G. S., 148, p. 185, 1897. Andesite. Q 4.7 or 32.8 ab 52.4 ac 6.0 ns 1.0 di 1.1 wo 0.4 il 0.5 tn 1.2 Kvelle Kerke, Lau- gendal, Norway. V. Schmelck. W. C. Brugger, Eg. Kg., Ill, p. 216, 1898. Lestiwarite. Q 5.7 or 29.5 ab 56.1 di 1.3 wo 1.8 mt 2.8 hm 1.8 Solvsberget, Gran, Norway. L. Schmelck. W. C. Brogger, Eg. Kg., I, p.78, 1894. Solvsbergite. Q 0.9 or 35.6 ab 56.1 an 2.0 di 0.9 hy 1.3 mt 3.6 Lovas Bay, Farris, Norway. P. Schei. W. C. Brogger, Eg. Kg., Ill, p. 198, 1899. Pulaskite. or 35.0 ab 48.2 ne 5.4 ac 1.4 di 5.9 ol 2.4 il 0.9 Tonsenas, n. Chris¬ tiania, Norway. G. Forsberg. W. C. Brogger, Z. K.,XVl,p. 54,1890. Nordmarkite. or 31.7 ab 55.0 an 3.2 C 1.2 hy 0.6 il 0.8 hm 4.6 Hedrum, Laugendal, Norway. V. Schmelck. W. C. Brogger, Eg. Kg., Ill, p. 203, 1899. Bostonite. or 35.6 ab 52.4 ne 2.0 ac 0.5 di 6.7 il 1.2 Ahvenvaara, Kuus- amo, Finland. N. Sahlbom. V. Hackmann, B. C. G., I, Finl, II, p. 35, 1900. Pyroxene-syen¬ ite. Cl 0.18 Q 6.4 or 32.8 ab 47.2 an 0.8 di 2.7 wo 1.5 mt 6.3 Kiihlsbrunnen, Sie- bengebirge, Rhen¬ ish Prussia. W. Bruhns. W. Bruhns, Vh. Nh. Ver. Bonn, LIII, p. 44, 1896. .Egi rite-tra¬ chyte. so 3 0.12 Q 5.5 or 25.0 ab 52.9 an 2.8 C 1.5 hy 4.7 il 1.2 hm 4.2 Near Rothe Miihle, Thuringerwald, Germany. Hampe. H. Loretz, Jb. Pr. G.L-A. (1888), p. 300, 1889. Biotite-por- phyrite. SO s for S. Q 0.2 or 31.1 ab 61.3 an 0.6 di 0.7 wo 1.2 mt 0.9 hm 3.7 Edda Gijorgis, Abys¬ sinia. G. T. Prior. G. T. Prior, Min. Mag., XII, p. 266, 1900. Solvsbergite. . 198 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS I. PERSALANE—Continued. RANG 1. PERALKALIC. NORDMARKASE. No. SiOj A1A FeA FeO MgO CaO Na 2 0 k 2 o h 2 o+ H 2 0- co 2 Ti0 2 PA MnO BaO Q Sum Sp. gr. 1 67. 53 18.57 1.13 0.08 0. 24 0. 55 11.50 0.10 0. 31 0.15 0. 07 0.11 trace 100.34 A2. II 3.126 .182 .007 .001 .000 .010 .185 .001 .001 .001 — 2 63. 01 18. 48 0. 06 0.32 0. 06 2. 66 10.01 0. 39 0. 27 0.05 2.01 0.13 0. 06 0. 06 0. 02 99. 69 Al. I 1.050 .181 — .004 .002 .048 .161 .004 • .002 — .001 — 3 62. 53 18. 72 3. 26 0. 34 0. 08 0. 54 11. 77 0. 79 0. 68 0. 16 99. 95 2. 699 A3. Ill 1.012 .184 . 020 .005 .002 .010 .190 .008 .002 RANG 2. DOMALKALIC. PULASKASE. 1 58. 21 19. 90 4.07 0. 87 0. 98 3.58 2. 57 9.17 0. 74 — trace 100. 09 A3. Ill .970 .195 . 025 .012 .025 .064 .041 .098 2 57. 32 19.85 2. 21 2. 35 1.60 3. 82 3. 22 9.15 0. 57 100.09 2. 611 A3. Ill . 955 . 195 .014 .033 . 040 .068 .052 .097 3 55.17 20.49 3. 27 2. 74 1.58 3. 73 2. 27 9. 58 0. 99 trace 99. 82 A3. Ill . 920 .201 .020 .038 .040 .066 .037 .105 — • 4 66. 25 18. 74 1.36 n. d. 0.50 1.23 3. 04 8. 80 0. 22 100.14 A3. Ill 1.104 .183 .009 (.018) .013 .022 .051 .094 ' RANG 2. DOMALKALIC. PULASKASE. 1 60. 75 19. 68 1.54 2. 98 0. 81 2. 29 4.89 5.90 0.08 0. 24 0. 63 trace trace 99. 79 A2. II 1.013 .193 .010 .041 .020 .041 .079 .063 .008 —- — 2 62. 28 19.17 3.39 n. d. Trace. 1.44 5. 37 5.93 2. 33 99.91 2. 648 A4. IV 1.038 .188 .021 (.042) — .026 .087 .063 l 3 65. 65 16. 84 n. d. 4.01 0.13 2.47 5. 27 5.04 0. 30 99. 71 • A4. IV 1.094 .165 — .056 .003 .045 .085 .054 4 63. 45 18. 31 0.42 3. 56 0. 35 2. 93 5.06 5.15 0. 30 0. 07 trace none 0.13 99. 73 2. 717 A2. II 1.058 .179 .003 .050 .009 .051 .081 .056 .001 — — .001 20° 5 60. 20 20. 40 1. 74 1.88 1.04 2.00 6. 30 6. 07 0. 23 0.10 none 0.14 0. 15 trace 100. 47 Al. I 1.003 .200 .011 .026 .026 .036 .102 .065 .002 .001 — 6 60.03. 20. 76 4.01 0. 75 0. 80 2. 62 5. 96 5.48 0. 53 0. 06 0.07 trace 101. 07 2. 656 B2. Ill 1.001 .203 .031 .011 .020 .047 .096 .059 — — 7 59. 23 19.98 4. 72 n. d. 1. 10 2. 41 5. 47 5. 76 1.38 100. 05 2. 521 A4. IV .971 .196 .030 (.060) .028 .043 .089 .062 8 65. 54 17.81 0. 74 1.15 0. 98 1.92 5. 55 5. 58 0. 54 0.11 trace 99. 92 A2. II 1.092 . 175 .005 .016 . 025 .034 .090 .059 .001 — 9 57.18 : 18.54 3. 65 1.15 0.69 2.31 4. 48 8. 58 2.10 0. 30 0. 05 trace 0.49 100.35 .17 V Al. I i . 953 1 .182 .023 .016 1 .017 .041 . 072 .091 .004 .003 100.18 PERSALANE-PIJLASKOSE. 199 ORDER 5. PERFELIO. CANADARE—Continued. SUBRANG 5. PERIODIC. TUOLUMNOSE Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. SrO trace or 0.6 ab 95.4 ac 1.4

  • 64. 63 18.15 3.05 n.d. 0. 50 1.54 5.80 4. 79 1.08 1.00 100. 54 A4.IV 1.077 . 178 .020 (. 040) .013 .028 .093 .051 .014 3 59.25 19.46 n.d. 5.08 t race 2. 07 7.39 3.96 2.12 0. 70 100.03 A4. IV .988 .191 — .071 — .038 .119 .042 4 57. 21 18. 67 n. d. 3.41 1.10 3. 07 6. 62 4. 92 3. 61 1.01 99. 62 A4.IV .954 .183 — .048 .027 .055 .106 .053 5 64. 40 16. 90 1.86 1.37 1.13 2. 60 5. 79 4. 56 0. 39 0.16 none 0.23 0.21 none 0. 27 100.10 Al. I 1.073 .166 .012 .019 .027 .047 .093 .049 .003 .001 — .002 6 63. 07 17. 47 2. 09 1.38 1.44 2. 27 5. 77 4. 59 0. 43 0.25 none 0. 38 0.18 0. 03 0. 32 99. 84 Al. I 1.051 .171 .013 .019 .036 .041 .093 .049 .005 .001 — .002 7 63. 49 18. 40 2. 44 1.09 0. 66 2. 30 5. 70 4. 62 1.04 trace trace trace 0.16 99. 90 A3. Ill 1.068 .180 .015 .015 .017 .041 .092 .049 — .002 8 60. 98 19. 09 1.76 1.15 0. 65 3. 67 6. 70 3.53 0. 44 0. 48 0. 52 0. 36 0.10 0.15 0.43 100. 29 Al. I 1.016 .187 .011 .016 .016 .066 .108 .037 .005 .001 .002 .003 PERSALANE-LAURVIKOSE. 201 ORDER 5. PERFELIC. CANADA RE—Continued. SUBRANG 3. SODIPOTASSIC. PULASKOSE—Continued. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. Cl NiO 0.43 trace or 41.7 ab 28.3 an 10.6 ne 3.4 so 5.9 ol 6.1 mt 1.9 il 0.6 Square Butte, High- wood Mountains, Montana. W. H. Mel¬ ville. Lindgren and Melville, A. J. S., XLV, p. 296, 1893. Sodalite-syen- ite. NiO 0.19 Q 5.8 or 33.9 ab 37.2 an 10.0 di b. 1 mt 2.1 il 0.9 hm 1.8 Stinkingwater River, Yellowstone Na¬ tional Park. W. H. Mel¬ ville. J. P. Iddings, J. G., Ill, p. 947, 1895. Quartz-bana- kite. Zr0 2 Cr.,0 3 v 2 o 8 SrO LLO trace trace 0.01 0.09 trace or 36.1 ab 37.7 an 8.6 ne 4.8 di 4. 5 ol 1.0 mt 3.0 il 0.6 Dike Mountain, Yel¬ lowstone National Park. W. F. Hille- brand. Hague and Jaggar, B. G. S. G. S. 168, p. 98, 1900. Biotite-tra- chyte. Q 6.4 or 32.2 ab 49.8 an 8.1 C 0.2 hy 1.0 mt 1.4 Rosita Hills, Colo¬ rado. L. G. Eakins. W. Cross, Pr. Colo. Sc. Soc., II, p. 233, 1887. Trachyte. Also in 17 A. R. U.S.G. S.,II, p. 324, 1896. ZrOo SrO" 0.08 0.07 Q 10.2 or 30.0 ab 37.7 an 13.6 di 1.8 hy 0.4 il 0.6 hm 3.9 Bare Hills, Pike’s Peak, Colorado. W. F. Hille- brand. W. Cross, B. U. S. G. S., 148, p. 163, 1897. Andesite. Q 8.5 or 22.8 ab 35.6 an 16.7 di 4.4 hy 3.8 mt 3.7 il 0.5 Pringle Hill, Rosita Hills, Colorado. L. G. Eakins. W. Cross, 17 A. R. U.S. G. S.,II, p. 324,1896. Andesite. Near laurvikose. Q, 3.2 or 31.1 ab 46.6 an .8.9 di 2.1 hy 4.2 mt 3.2 Ullernas, Norway. G. Forsberg. W. C. Brogger, Z. K., XVI, p. 49, 1890. Akerite-por- phyry. Main mass. For border cf. No. 6. Salemose. so 3 Cl P none trace trace Q, 6.1 or 38.3 ab 38'. 8 an 8.6 C 0.6 hv 7.0 if 0.6 Algersdorf, Bohemia. F. Ullik. J. E. Hibsch, T. M. P. M., IX, p. 247, 1888. Trachyte. Q 3.5 or 37. 3 ab 37.7 an 8.6 di 5.9 hy 4.2 mt 0.7 Monte Ciliano, Viterbo, Italy. L. Ricciardi. A. Verri, B. S. G. Ital., VIII, p. 403, 1889. Trachyte. or 39.5 ab 35.1 an 12.0 ne 4.3 di 1.7 ol 6.0 Rocov-Kamik, n. Sofia, Bulgaria. ' L. Dimitrow. L. Dimitrow, Ds. Wien. Akad., LX, p. 497, 1893. Pyroxene- syenite. • SUBRANG 4. DOSODIC. LAURVIKOSE. - or 31.1 ab 43.5 an 9.5 ne 8.0 C 3.2 ol 2.4 Methuen Township, Peterborough Coun¬ ty, Ontario. W. G. Miller. W. G. Miller, Rep. Bur.Mines.Tor., VIII,pt. 2, p. 207,1899. Nephelite- syenite. Q 6.2 or 28.4 ab48.7 an 7.8 C 0.6 hy 6.6 Fourche Mountain, n. Little Rock, Ar¬ kansas. R. N. Brackett. J. F. Williams, A. R. G. S. Ark., 1890, II, p. 96, 1891. Quartz-syenite. MnO high. or 23.4 ab 51.4 an 8.3 ne 6.0 di ol 2.1 6.5 Annie (’reek, Black Hills, South Dakota. Flintermann. J. D. Irving, Ann. N. Y. Ac. Sc., XII, p. 272, 1899. Phonolite. or 29.5 ab 38.3 an 6.7 ne 9.4 di ol 7.4 3.9 Whitetail Gulch, Black Hills, South Dakota. Flintermann. J. D. Irving, Ann. N. Y. Ac. Sc., XII, p. 272, 1899. Phonolite. ZrO.i NiO SrO Li.,0 0.02 none 0.14 trace Q 7.1 or 27.2 ab 48.7 an 6.7 di by mt il 5.2 0.8 2.8 0.5 Copper Creek Basin, Yellowstone Na¬ tional Park. W. F. Hille- brand. Hague and Jaggar, B. U. S. G. S. 168, p. 95, 1900. Augite-syenite- porphyry. ZrO., FeSo Cr.,d :! v ? o 3 NiO SrO trace 0.02 trace trace none 0.15 Q 5.6 or 27.2 ab 48.7 an 8.1 di by mt il 2.6 2.4 3.0 0.8 Copper Creek Basin, Yellowstone Na¬ tional Park. / W. F. Hille- brand. Hague and Jaggar, B. IT. S. G. S. 168, p. 95, 1900. Quartz-syenite. Q 7.0 or 27.2 ab 48.2 an 10.8 hy mt 1.7 3.5 Pringle Hill, Rosita Hills, Colorado. W. F. Eakins. W. Cross, Pr. Colo. Sc. Soc., II, p. 250, 1887. Andesite. Also in 17 A. R. U. S. G.8.,11, p. 324, 1896. SrO Li..O 1 0.28 trace Q 1.3 or 20.6 ab 56.6 an 11. 7 di wo mt il 3.8 1.0 2.6 0.8 MountPennell, Henry Mountains, Utah. W. F. Hille- brand. W. Cross, 14 A. R. U.S. G. S., II, p. 227, 1894. Augite-por- phyry. 202 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS I. PERSALANE—Continued. RANG 2. DOMaLKALIC. PULASKASE—Continued. No. Si0 2 AlA Fe,O s FeO MgO CaO Na.,0 k 2 o H,0+ H 2 0— C0 2 Ti0 2 PA MnO BaO Sum Sp. gr. 9 62.10 18.02 n. d. 3. 57 0. 75 2. 59 6. 51 4. 07 1.99 100. 62 A4. IV 1.035 .170 — .050 .019 .047 .105 .043 10 56.19 20. 25 2. 76 2. 32 1. 12 4. 30 6. 33 4.19 0. 65 0. 57 0. 54 99. 47 2.674 A2.II .937 .198 .017 .032 . 028 .077 .102 .045 .007 .004 11 60. 45 20. 14 3. 80 n. d. 1.27 1. 68 7 OQ t . Z.j 5. 12 0.71 100.40 A4. IV 1.008 .197 .024 (.048) .032 .030 .117 .054 12 60. 72 19. 90 3. 56 0.85 1.25 2. 75 6. 24 4.16 0. 61 100. 04 A3. Ill 1.012 .195 .022 .012 .031 .049 .101 .044 13 59. 38 19. 35 4. 97 0.13 0. 91 4. 36 5.15 3. 88 0. 90 1.36 0. 38 100.77 A2.II .990 .190 .031 .002 .023 .078 .083 .041 • .017 . 002 14 58. 82 21.06 3. 26 0. 70 1.38 3. 03 6. 83 3. 70 1.26 100. 04 A3. Ill .930 .207 . 020* .010 . 035 .054 .110 .039 15 57. 59 22. 38 3. 09 0. 78 2.34 3. 23 6.11 3. 40 0. 70 99. 62 A3. Ill .900 .220 .019 .011 .059. . 058 .099 .036 16 57. 33 20. 30 4. 95 1. 03 1.93 2.67 6. 05 4. 76 0. 68 99. 80 A3. Ill . 967 .199 .031 .014 .048 .048 .098 . C51 17 56. 85 21. 56 3. 44 1.14 0. 85 5. 26 6.07 3. 66 0. 52 99. 35 A3. Ill .948 .211 .022 .014 .021 .094 .098 .039 18 58. 88 20. 30 3. 63 2. 58 0. 79 3. 03 5. 73 4. 50 1.01 0.54 100. 99 B3. IV .9.31 .199 .023 .036 .020 .054 .092 .048 .004 19 57.12 21. 69 1.63 3. 65 1.55 4.03 5.93 3. 48 0. 58 99. 66 A3. Ill .952 .213 .010 .051 .039 .072 .096 .037 20 65. 01 18. 27 0. 84 0. 83 0. 80 1.50 6. 79 4.34 1. 74 100.12 A3. Ill 1.083 .179 .005 .011 .020 .027 .110 .046 21 61. 19 21.24 1.62 n. d. trace 1.87 6. 80 5.97 0. 93 0.39 100. 01 K" HH ■rf < 1.020 .210 .010 (.020) — .034 .109 .064 .005 22 64.69 17. 32 1.23 3. 01 1. 54 2.18 6. .36 2.30 2.09 0. 44 trace trace 101. 16 2. 65 B2. Ill 1.078 .170 .007 . 042 .039 .039 .102 .024 . 006 — — 23 55. 91 19. 73 2. 73 1.36 0. 75 2. 39 7.24 2.1.3 4. 33 1.89 trace 0.18 0.46 99.41 2. 471 Bl. II . 932 .193 .017 .019 .019 .043 .117 . 022 — .001 .006 24 61.47 18.09 5. 14 3. 06 1.32 3. 00 5. 85 2. 83 n. d. 100. 76 A3. Ill 1.025 .177 .032 .043 .033 .053 .094 .030 25 61.43 17.51 5.11 2.30 0.54 • 2.45 6. 22 3. 95 n. d.. 99.51 2. 34 A3. Ill 1.024 .171 . 032 .032 .014 .044 .100 .042 26 60.24 20. 28 2. 32 3. 88 0. 50 1.96 7.80 4. 28 101.26 C3. V 1.004 . 198 .014 .054 .013 . 036 .126 .046 27 66. 71 15. 82 0. 71 0. 32 2.05 3. 92 7.12 2. 42 1.01 100. 08 A3. Ill 1.112 .155 .004 .004 .051 .070 .114 .025 PERSALANE-LAURVIKOSE. 203 ORDER 5. PERFELIC. CANADA RE—Continued. SUBRANG 4. DOSODIC. LAURVIKOSE—Continued. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. BeO 1.02 Q 0.2 or 23.9 ab 55.0 an 7.8 di 4.5 hy 6.2 Aiguille du Charmoz, Mont Blanc, France. Duparc. Duparc and Mrazec, Mem. Soc. Phys. Gen., XXXIII, No. l,p. 48, 1898. Protogine with beryl. so 3 Cl 0.16 0.09 or 25.0 ab 42.4 an 14.5 ne 6.0 di 3.2 ol 1.6 mt 3.9 il 1.1 ap 1.2 Ferrera, Columbretes Islands, Spain. R. Pfohl. F. Becke, T.M. P. M., XVI, p. 177, 1896. Tephri tic-tra¬ chyte. or 30.0 ab 46.1 an 7.3 ne 8.2 di 1.0 ol 6.8 Auerod, n. Holme- strand, Norway. G. Forsberg. W. C. Brdgger, Z. K., XVI, p. 54, 1890. Nordmarkite. Q 0.8 or 24.4 ab 52.9 an 13.6 hy 3.1 mt 2.8 hml.6 Notterd, n. Tdns- berg, Norway. G. Forsberg. IV. C. Brdgger, Z. K., XVT, ji. 35, 1890. Rhomben- porphyry. Q 4.7 or 22.8 ab 43.4 . an 18.3 hy 2.3 il 0.3 hm 5.0 tn 2.4 Bollaerene, n. Tdnsberg, Norway. V. Schmelek. W. C. Brdgger. Eg. Kg., Ill, p. 329, 1899. Tdnsbergite. or 21.7 ab 52.4 an 15.0 ne 2.8 C 0.4 ol 2.5 mt 2.3 hml.O Slotsberg n. Tdns- berg, Norway. G. Forsberg. IV. C. Brdgger, Z. Iv., XVI, p. 35, 1890. Rhomben-por- phyry. or 20.0 ab 51.9 an 16.1 C 2.8 ol 4.1 mt 2.6 hm 1.3 Fagerheimasen, Not- tero, Norway. G. Forsberg. W. C. Brdgger, Z. K., XVI, p. 35, 1890. Augite-svenite. or 28.4 ab 45.1 an 13.3 ne 3.4 C 0.2 ol 3.3 mt 3.2 hm 2.7 Teie, Notterd, Nor¬ way. G. Forsberg. W. C. Brdgger, Z. K., XVI, p. 35, 1890. Rhomben-por- phyrv. or 21.7 ab 43.5 an 20.6 ne 4.3 di 4.4 mt 3.2 hml.3 Notterd, n. Tdnsberg, Norway. G. Forsberg. W. C, Brdgger, Z. K., XVI, p. 30, 1890. Laurvikite. Sum low. Q 1.6 or 26.7 ab 48.2 an 11.4 C 1.8 hy 3.8 mt 5.3 ap 1.2 Byskoven, n. Laur- vik, Norway. Stahl and Mansfeld. A. Merian, N. J. B. B., Ill, p. 266, 1885. Augite-syenite. (Laurvikite, W. C. B.) Alkalies not exact. or 20.6 ab 46.6 an 20.0 ne 2.0 C 0.8 ol 7.0 mt 2. 3 Frederiksvarn, n. Laurvik, Norway. G. Forsberg. W. C. Brdgger, Z. Iv., XVI, p. 30, 1890. Laurvikite. Q 4.6 or 25.6 ab 57.1 an 6.7 di 0.8 hy 2.4 mt 1.2 Frohnfeld, n. Kel- berg, Eifel. K. Vogelsang. Iv. Vogelsang, Z. D. G. G., XLII, p. 10, 1890. Trachyte. or 35.6 ab 46.6 an 9.5 ne 5.4 C 0.4 ol 1.6 il 0.8 Laacher See, Rh. Prussia. W. Bruhns. W. Bruhns, Vh. Nh. Ver. Bonn, XLVIII, p. 324, 1891. Sanidinite. Q 10.6 or 13.3 ab 53.0 an 10.8 C 0.5 hy 7.7 mt 1.6 il 0.9 Kddelschutzteich, n. Nordhalben, Thur¬ ingia. R. Pohlmann. R. Pohlmann, N. J. B. B., Ill, p. 86, 1885. Quartz-mica- diorite-por- phvrite. Near lassenose. so 3 Cl F i 0.21 0.10 trace or 12.2 ab 61.3 an 12.0 C 1.1 ol 1.5 mt 3.9 Schwintel, Hegau, Germany. G. F. Fdhr. G. F. Fdhr, In. Diss.Wurzburg, p. 30, 1883. Phonolite. Not fresh. Q 7.9 or 16. 7 ab 49.3 an 14.7 di 4.7 mt 7.4 Montagna Grande, Pantelleria. H. Forstner. H. Forstner, Z. K., VIII, p. 155, 1884. Augite-ande- site. Q 5.0 or 23.4 ab 52.4 an 8.4 di 3.3 mt 7.4 Porto Scauri, Pantelleria. H. Forstner. H. Forstner, Z. K., VIII, p. 164, 1884. Augite-ande- site. or 25.6 ab 50.3 an 7.2 ne 8.5 di 2.4 ol 4.1 mt 3.2 Montagna Grande, Pantelleria. E. Maegis. H. Forstner, Z. K., VIII, p. 155, 1884. Augite-ande- site. Q 8.6 or 13.9 ab59.7 an 4.4 di 11.3 mt 1.0 Deleng Baros, Sumatra. W. Herz. L. Milch, Z. D. G. G., LI, p. 66, 1899. Dacite. Near akerose. 204 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS I. PERSALANE—Continued. RANG 2. DOMALKALIC. PULASKASE. No. Si0 2 ai 2 o 3 FeA FeO MgO CaO Na 2 0 K 2 0 H 2 0+ H 2 0- co 2 TiC) 2 I\A MnO BaO Sum Sp. gr. 1 60.13 20. 47 1.04 0. 72 1.15 2. 59 9.60 1.06 3.44 trace trace 100. 20 A3. Ill 1.002 .201 .007 .010 .029 .046 .155 .011 — — 2 62. 90 22. 80 1.05 n. d. 0. 40 3. 55 8. 49 0.53 0. 90 100. 62 B3. IY 1.048 .223 .007 (.014) .010 .063 .137 .005 • RANG 3. ALKALICALCIC. 1 59. 33 20. 46 1. 66 0. 22 0. 83 7.09 2.58 7.03 0. 36 trace 0.10 0.05 0.16 none 100. 02 Al. I .989 .200 .010 .003 .021 .127 .042 .074 .001 ~ .002 RANG 3. ALKALICALCIC. 1 59. 26 23. 63 0. 30 0. 57 0. 31 5. 93 4.94 4. 78 0. 74 100.46 2. 625 A3. Ill .988 .231 .002 .008 .008 .105 .079 .051 31° RANG 3. ALKALICALCIC. 1 54. 83 25. 49 1.61 1. 65 1.96 6. 08 5.69 1.87 1.18 0.18 100. 54 A3. Ill .914 .250 .010 .023 .049 .109 .092 .020 2 58. 28 19. 37 1.35 2.98 1.30 4. 78 4. 40 3. 75 1.78 0. 44 0. 33 0. 96 0. 35 0.07 0. 25 100. 48 Al. I .971 .190 .008 .041 .033 .085 .071 .040 .012 .002 .001 .002 RANG 4. DOCALCIC. LABRADORASE. 1 49. 78 29. 37 0.34 0. 60 1.07 11.86 4.39 0. 46 1.76 none 0. 08 none 99. 80 2.676 A2. II .830 .288 .002 .008 .025 .211 .071 .005 — .001 — 2 53.43 28.01 0. 75 n. d. 0. 63 11.24 4. 85 0. 96 trace 99. 87 2. 673 A3. Ill .891 .274 .005 (.010) .016 .200 .078 .010 3 53. 42 28. 36 1.80 • n.d. 0.31 10. 49 4.82 0. 84 n. d. 100.04 A3. Ill .890 .278 .011 (.022) .008 .187 .077 .009 4 53. 02 27. 75 2. 92 n. d. 0. 93 10.12 4. 67 0.81 n. d. 0.12 100.36 A3. Ill .884 .273 .018 (.036) .023 .180 .076 .009 .001 5 52. 61 27.15 4. 05 n. d. 1. 55 9. 96 4. 53 0. 78 n.d. 0. 23 100. 87 A3. Ill . 877 .267 .025 (.050) .039 .178 .073 .008 .003 6 55. 01 28. 31 n. d. 0. 73 0. 40 10. 42 4.52 0. 61 100. 00 A3. Ill .917 .277 — .010 .010 .185 .072 .006 PERSALANE-LABRADOROSE. 205 ORDER 5. PERFELIC. CANADARE—Continued. SUB RANG 5. PERSODIC. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. or 6.1 di 2.4 ab68.6 ol 1.5 an 9.7 int 1.6 lie 6.8 Fair Haven, Connecticut. H. S. Washing¬ ton. E. 0. Hovev, A. J. S., Ill, p. 291, 1897. Keratophyre. H 2 0 includes co 2 . Not fresh. Q 2.8 hv 2.8 or 2.8 ab 71.8 an 17.5 C 1.8 Jablanica, Herzegowina. C. v. John? C. v. John, J. v. Wien, G. R-A., XXXVIII, p. 346, 1888. Diorite. A1 2 0 3 high? MgO low? SUBRANG 2. DOPOTASSIC. MAZARUNOSE. ZrOo Cl " FeSo none 0.06 0.02 Q 3.4 or 41.1 a)>22. 0 di 4.5 wo 2.6 mt 0. 7 Mazaruni district, J. B. Harrison. J. B. Harrison, Priv. contrib. Augite-syenite. Dried at 100°. British Guiana. CoO 0.01 an 23.4 Inn 1.1 Cu 0.05 Pb 0.01 SUBRANG 3. SODIPOTASSIC. or 28.4 di 1.0 Table Mountain, L. G. Eakins. W. Cross, Augite-ande- Pebble. ab 40.3 ol 0.7 an 28.1 mt 0.5 Denver, Colorado. B. U. S. G. S., 148, site. ne 1.0 p. 159, 1897. SUBRANG 4. bOSODIC. or 11.1 ab 47. 2 an 30.3 ne 0.6 C 3.0 ol 4.9 mt 2.3 Horse Race, Menomi¬ nee River, Wiscon¬ sin. R. B. Riggs. G. H. Williams, B. U. S. G. S., 62, p. 113, 1890. Mica-diorite- porphyry. Dried at 105°. SrO 0.09 Li 2 0 trace? Q 5.2 or 22.2 ab 37. 2 an 22.0 di 1.4 hy 5.4 mt 1. 9 il 1.8 Shield’s River Basin, Crazy Mountains, Montana. W. F. Ilille- brand. J. E. Wolff, B. U. S. G. S., 148, p. 143, 1897. Diabase-por- phyrite. SUBRANG 3. PRESODIC. LABRADOROSE. SrO none or 2.8 ab 28,8 an 58.7 ne 4.5 ol 2.5 mt 0. 5 Carlton Peak, Min¬ nesota. A. N. Winchell. A. N. Winchell, . A. G., XXVI, p. 281, 1900. Plagioclasite. or 5.6 ab.il. 7 an 35.1 ne 3.1 di 3.4 ol 1.2 Nain, Labrador. A. Wichmann. A. Wichmann, Z. D. G. G., XXXVI, p. 491, 1884. Labradorite- rock. or 5.0 ab 38.3 an 52.0 C 0.5 ol 2.8 Ogne, Ekersund, Norway. C. F. Kolderup. C. F. Kolderup, Berg. Mus. Aarb., 1896, No. 5, p. 96. Labradorite- rock- or 5.0 ab 37. 7 an 50.0 ne 1.1 C 0.8 ol 5.3 Near Lister, Norway. C. F. Kolderup. C. F. Kolderup, Berg. Mus. Aarb., 1896, No. 5, p. 113. Labradorite- rock. or 4.4 ab 37.2 an 49.5 ne 0.6 C 0.8 ol 7.7 il 0.5 Rekefjord, Ekersund, Norway. C. F. Kolderup. C. F. Kolderup, Berg. Mus. Aarb., 1896, No. 5, p. 79. Labradorite- rock. Q 3.5 or 3.3 ab 37.7 an 51.4 C 1.4 hy 2.3 Turtschinka, Wolhynia, Russia. J. Morozewicz. W. Tarassenko, cf. N. J., 1899, I, p. 463. Labradorite- rock. 206 CHEMICAL ANALYSED OF IGNEOUS ROCKS CLASS I. PERSALANE—Continued. RANG 5. PERCALCIC. CAXADASE. No. SiO, A1A Fe 2 0 3 FeO MgO CaO Na 2 0 K,0 H,0+ H.,0— C0 2 Ti0 2 P-A MnO BaO Sum Sp. gr. 1 45. 78 30. 39 1.33 1.22 2.14 16. 66 1. 66 0.10 0.51 99. 79 A3. Ill . 763 .298 .008 .017 .054 .297 .027 .001 2 47. 32 30. 36 1.35 1.55 2.44 15. 45 1.88 0. 66 0.10 0. 58 101.69 2.73 C2. IV .789 .298 .009 .022 .061 .276 .030 .007 3 46.24 29. 85 1.30 2.12 2.41 16.24 1.98 0.18 n. d. 1.03 trace 101.35 2.85 C2. IV .771 .293 .008 o CO O .060 .290 .032 .002 — CLASS I. PERSALANE. RANG 1. PERALKALIC. MIASKASE. 1 53. 56 24. 43 2.19 1. 22 0.31 1.24 6.48 9.50 0. 93 0.10 99. 96 A3. Ill .893 .240 .014 .017 .008 .022 .104 .101 .001 2 55. 06 23. 29 3. 29 n. d. trace 1.46 6. 76 8. 86 1.08 99. 80 A4. IV .918 . 228 .020 (.040) — .026 .109 .094 3 60. 42 19. 23 0. 63 3.19 0. 67 1 '70 1.76 6. 99 6. 88 1. 74 trace 101.48 B3. IV 1.007 .189 .004 .044 .017 .031 .113 . 073 — 4 58. 89 19. 67 1.79 1.23 0.17 1.31 4.41 11.00 1.11 0. 59 100.17 2.557 A3. Ill .982 .193 .011 .017 .004 .023 .071 .117 .008 5 55.18 23.03 2. 85 n. d. 0. 25 1.06 5.98 8. 43 2.62 100.16 A4. IV .920 .226 .018 (.036) .006 .020 .097 .089 6 55. 87 21.82 2.34 1.10 0.48 3.07 4. 81 10. 49 0. 34 trace 100. 32 2. 551 A3. Ill .931 .214 .015 .015 .012 . 055 .078 .114 — RANG 1. PERALKALIC. MIASKASE. 1 v 58. 30 21. 38 1.05 2.04 0. 22 0. 95 8. 66 6. 06 0. 45 0. 35 none 0.10 0.04 trace none 100. 05 .08 Al. I .972 .210 .007 .029 .006 .017 .140 .065 .001 — 1 99.97 2 58. 77 22. 53 1.54 1.04 0.19 0. 74 9. 62 4. 89 0. 90 0.07 0.31 trace none 100. 71 2.596 A2. II .980 .220 .010 .014 .005 .013 .155 . 052 .004 — — • 11° 3 56. 75 20. 69 3. 52 0. 59 0.11 0. 37 11.45 2. 90 3.18 0.04 0. 30 trace none 100.18 .06 2. 474 A2. II .946 .203 .022 .008 .003 .007 .185 .031 .004 — — 100.12 22° 4 54. 22 20. 20 2.35 1.02 0.29 0. 70 9. 44 4. 85 5. 57 0. 42 trace 0. 38 0.11 0.19 trace 99. 74 Al. I .904 .198 .015 .014 .007 .012 .152 .052 .005 .001 .003 — 5 59 73 20. 05 3. 43 0. 99 0.17 3. 35 7. 94 4. 77 4. 85 0. 69 0. 93 n. d. trace 0.11 100. 01 2.466 A3. Ill .879 .197 .021 .014 .004 .060 .128 .051 — — .001 6 58.74 20. 85 4.15 n. d. 0. 22 0. 36 9. 72 4. 23 1.82 100. 09 A4. IV .979 .204 .026 (.052) .006 .007 .156 . 045 PERS A L A N E-MIA S KOSE. 20V ORDER 5. PERFELIC. CANADARE—Continued. SUBRANG. NOT NEEDED. I nclusive. Norm. or 0 . 6 di 6. 1 nb 12. 1 ol > 5 an 75. 1 mt l! 9 ne 1 . 1 or 3. 9 di 3. 5 ab 13. 6 ol 4. 4 an 72. 6 mt o 1 ne 1 . 1 or 1 . 1 di 7. 1 nb 12. 1 ol 3. 0 an 72. 0 mt 1. 9 ne o 6 or 56.2 ol 0.9 ab 3.4 mt 3.2 an 6.1 ne 27.5 c 1.3 or 52.3 ol 5.3 ab 6.3 an 7.0 ne 27.5 or 40.6 di 6.7 ab 35.0 ol 2.8 an 0.8 mt 0.9 nel3.1 or 65.1 di 2.5 abl3.1 wo 1.0 an 1.4 mt 2.6 ne 13.1 S0 3 0.44 or 49.5 Cl 0.32 ab 18.3 ol 4.2 an 5.6 ne 7. 7 so 4.9 no 3. 6 c 3.0 or 63.4 di 2.6 an 6.1 wo 2.5 ne 22. 2 mt 3. 5 Locality. Analyst. Reference. Author’s name. Remarks. , Burnt Head, Monhe- gan Island, Maine. E. C. E. Lord. E. C. E. Lord, A. G., XXVI, p. 340, 1900. Anorthosite. South Sherbrooke, Ontario. A. W. Lawson. W. G. Miller, Rep. Bur. Mines, Tor., VII.pt. 2, p. 227,1899. Corundum- anorthosite. Also in A. G., XXIV, p. 280, 1899. Mouth of Seine River, Rainy Lake region, Ontario. A. W. Lawson. A. P. Coleman, Rep. Bur. Mines, Tor., V, p. 99, 1896. Anorthosite. Also in A. G., IV, p. 909, 1896. ORDER 6. LENDOFELIC RUSSARE. SUBRANG 3. SODIPOTASSIC. BEEMEROSE. Beemersville, New Jersey. L. G. Eakins. J. P. Iddings, B. U. S. G. S., 150, p. 211. 1898. Nephelite-syen- ite. • Serra de Tingua, Brazil. E. Hussak. E. Hussak, N. J., 1892, II, p. 146. Leucite-tingua- ite. Moita, Foya, Portugal. M. Dittrich. Kraatz-Koschlau anti Hackman, T.M.P. M., XVI, p. 225, 1896. Nephelite-syen- ite. Sum high. Picota, Serra de Monchique, Portugal. A. Zilliacus. Kraatz-Koschlau and Hackman, T. M. P. M., XVI, p. 252, 1896. Leucite-tingua- ite-vitro- phyre. • Rieden, n. Laacher See, Rhenish Prussia. K. Busz. K. Busz, Vh. Nh. Ver. Bonn, XLVIII, p.246,1891. Leucite-phono- lite. Lake Bracciano, Italy. II. S. Washing¬ ton. H. S. Washington, J. G., V, p. 49, 1897. Leucite-phono- lite. Dried at 110°. j SUBRANG 4. DOSODIC. MIASKOSE. ZrO, so 3 ‘ Cl 0.02 0.08 0.35 or 36.1 ab 35. l an 2.8 ne 15.1 so 5.0 di ol mt 1.7 2.0 1.6 Horne Farm, Red Hills, New Hamp¬ shire. H. S. Washing¬ ton. TI. S. Washington, Priv. contrib. Foyaite. Zr0 2 0.11 or 28.9 ab 43.0 an 3.6 ne 20.7 ol mt il 0.4 2.3 0.6 Salem Neck, Essex County, Massachu¬ setts. H. S. Washing¬ ton. H. S. Washington, J. G., VI, p. 803, 1898. Foyaite. A1 2 0 3 corrected for Zr0 2 . so 3 Cl trace 0.28 or 17.2 ab 46.6 ne23.6 ac di wo mt 6.0 0.5 0.5 2.0 Pickard’s Point, Man¬ chester, Essex Co., Massachusetts. H. S. Washing¬ ton. H. S. Washington, A. J. S., VI, p. 185, 1898. Analcite- tinguaite. Cl high? so 3 none or 28.9 ab 33.5 ne 23.3 ac di wo mt il 2.8 1.5 0.6 2.1 0.8 South boro, Massachu¬ setts. H. X. Stokes. B. U. S. G. S., 148, p. 77, 1897. Phonolite. Not described. or 28.4 ab 30.9 an 5.0 nel9.6 di 1.0 ol 4.4 mt 3.2 hm 1.1 Heron Bay, Lake Superior, Ontario. H. W. Charl¬ ton. A. P. Coleman, J. G., VII. p. 435, 1899. Ileronite. Not fresh. or 25. 0 ab 46.6 an 0.8 nel9.0 di ol 1.0 5.2 Saline County, Ar¬ kansas. W. A. Noyes. J. F. Williams, A. R. Ark. G. S., 1890, II, p. 139, 1891. Nephelite- syenite. 208 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS I. PERSALANE—Continued. RANG 1. PERALKALIC. MIASKASE—Continued. No.' Si0 2 Al 2 ( >3 Fe 2 0 3 FeO MgO CaO Na 2 0 K 2 0 h 2 0+ h 2 o- C0 2 Ti0 2 PA MnO BaO Sum Sp. gr. 7 54. 07 21.67 3.55 n. d. 0.36 0. 36 8.91 4. 76 5.44 0.15 99. 27 B3. IV .901 .212 .022 (.044) .009 .006 .143 .051 .002 8 58. 60 20. 98 2. 22 0.44 0. 33 1.13 8. 38 5.49 1.92 99. 69 A3. Ill . 977 .205 .014 .006 .008 .020 .135 .059 9 57. 86 20. 26 2. 35 0.39 0.04 0. 89 9. 47 5.19 2. 40 0.21 none 0.22 0. 03 0.21 0. 09 99. 97 Al. I .964 .599 .015 .005 .001 .016 .153 .055 .003 ■- .003 .001 10 59. 23 21.10 n. d. 4.13 0. 47 0. 64 8. 67 4. 49 1.18 0.10 100. 01 A4. IV .987 .207 — .057 .012 .011 .140 .048 11 58. 59 20. 77 n. d. 4. 35 0. 46 1.46 8.17 4. 80 0. 92 0.09 99.61 A4. IV .977 .203 — .061 .012 .026 .132 .051 12 58.09 21.29 n. d. 4.06 trace 0. 81 9.35 3. 79 2. 26 0. 20 99. 85 A4. IV .968 .209 — .057 — .014 .151 .040 13 57. 88 20. 46 n. d. 3. 77 0. 28 0. 76 8.74 5.11 2. 55 0.17 99. 72 A4. IV .965 .200 — .053 .007 .013 .141 . 055 14 56.94 21. 03 n. d. 3.41 0. 33 1.93 9. 05 4. 66 2.15 0. 39 99. 89 A4. IV .949 .206 — .048 .008 .034 .146 .050 15 56.57 20. 74 n. d. 5. 66 0. 23 1.05 9. 36 4. 49 1.49 1.11 99. 70 A4. IV .943 .203 — .079 .006 .019 .151 .048 16 55.94 20. 91 n. d. 4.50 0. 42 1.73 8.87 5. 44 2. 43 0. 31 100. 55 A4. IV .932 . 205 — .062 .011 .030 .143 .058 17 58. 70 19. 26 3. 37 0. 58 0. 76 1.41 8. 55 4. 53 2.57 0. 07 trace 0.10 0.10 100. 00 A2. II .978 .189 .021 .008 .019 .025 .138 .048 — .001 .001 18 60. 02 20. 98 2. 21 0.51 trace 1. 18 8. 83 5. 72 0. 70 t trace trace 100.15 2. 576 A3. Ill 1.000 .206 .014 .007 — .021 .142 .061 — — 13° 19 59.38 19. 47 1.60 1.19 0. 36 1. 96 7. 80 5.83 0. 69 0.11 0. 58 0. 08 0.15 0.13 100. 05 Al. I .990 .191 .010 .017 .009 .035 .126 . 062 .007 .001 .002 .001 20 59. 00 20. 07 1.58 0. 65 0.10 1.05 8.34 5. 63 2. 03 0. 24 0. 26 0. 29 0.05 0.12 trace 99. 92 Al. I .983 .197 .010 .009 .003 .019 .135 .060 .004 — .002 — 21 58.98 20.54 1.65 0. 48 0. 11 0. 67 9. 95 5.31 0. 97 0.19 0. 24 0.04 0. 26 none 100.07 .06 Al. I .983 .201 .010 .007 .003 .012 .160 .056 .003 — .004 100.01 22 58. 78 20. 03 1.87 0. 49 0.16 0. 83 9. 36 5.50 1.57 0.31 0. 29 0. 03 0.15 none 100. 24 .13 Al. I .980 .196 .012 .007 .004 .015 .151 .059 .004 — .002 — 100.11 23 58.64 19. 62 2.17 0. 42 0.37 1.24 8. 39 5.26 2. 40 0. 34 0. 23 0. 20 0.03 0. 20 trace 99. 74 2. 52 Al. I .977 .192 .014 .006 .009 .022 .135 . 056 * . .003 — .003 — | PERSALANE-MIASKOSE. 209 ORDER 6. LENDOFELIC. RUSSARE—Continued. SUBRANG 4. DOSODIC. MIASKOSE—Continued. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. or 28.4 ab 35.6 an 1.7 ne 21.3 C 1.2 ol 6.2 One mile south of Hot Springs, Ar¬ kansas. W. A. Noyes. J. F. Williams, A. R. Ark. G. S., 1890, II,. p. 370, 1891. Tinguaite. or 32.8 ab 41.4 an 3.1 ne 15.9 di 1.8 int 1.4 hml.3 Black Hills, South Dakota. H. N. Stokes. W. Cross, B. U. S. G. S., 148, p. 114, 1897. Phonolite. Same as next, No. 9. Zru so 3 Cl s SrO LioO 0.15 0.06 0.08 0.03 0.04 trace or 30.6 ab 39.3 nel9.0 ac 4.2 wo 1.9 mt 1.2 Black Hills, South Dakota. W. F. Hille- brand. W. Cross, B. U. S. G. S., 150, p. 193, 1898. Phonolite. Same as above, No. 8. or 26.7 ab 47.7 an 3.1 ne 13.9 C 0.8 ol 6.7 Squaw Creek, Black Hills, South Da¬ kota. Flintermann. J. D. Irving, Ann. N. Y. Ac., XII, p. 272, 1899. Tinguaite. or 28.4 ab 41.9 an 5.6 nel4.8 di 1.6 ol 6.6 Bald Mountain, Black Hills, South Da¬ kota. Flintermann. J. D. Irving, Ann. N. Y. Ac., XII, p. 272, 1899. Phonolite. or 22.2 ab 48.2 an 3.9 ne 16.8 C 0.4 ol 5.8 Green Mountain, Black Hills, South Dakota. Flintermann. J. D. Irving, Ann. N. Y. Ac., XII, p. 272, 1899. Phonolite. • or 30.6 ab 39.3 an 1.1 nel8.7 di 2.3 ol 5.1 Calamity Gulch, Black Hills, South Dakota. Flintermann. J. D. Irving, Ann. N. Y. Ac., XII, p. 272, 1899. Phonolite. - or 27.8 ab 35.6 an 2.8 ne 22.1 di 5.8 ol 3.3 Ragged Top Mountain, Black Hills, South Dakota. Flintermann. J. D. Irving, Ann. N. Y. Ac., XII, p. 272, 1899. Phonolite. or 26.7 ab 36.7 an 1.1 ne 23.0 di 3.6 ol 7.1 Annie Creek, Black Hills, South Dakota. Flintermann. J. D. Irving, Ann. N. Y. Ac., XII, p. 272, 1899. Phonolite. or 32.2 ab 28.3 an 1.1 ne 25.3 di 6.4 ol 4.6 Annie Creek, Black Hills, South Dakota. Flintermann. J. D. Irving, Ann. N. Ab Ac., XII, p. 272, 1899. Phonolite. or 26.7 ab 48.2 an 0.8 nel3.1 di 4.5 mt 1.9 hm 2.0 Shield’s River, Crazy Mountains, Mon¬ tana. W. H. Melville. Wolff and Tarr, B. M. C. Z., XVI, p. 232, 1893. Acmite- trachyte. Cl trace or 33.9 ab 43.0 an 0.8 nel7.0 wo 2.1 mt 1.6 hm 1.1 Between Florissant and Manitou, El Paso Co., Colorado. L. G. Eakins. « W. Cross, Pr. Col. Sc. Soc.., II, p. 169, 1887. Phonolite. Also in 16 A. R. U,S.G.S.,II, p. 39, 1895. ZrOo so 3 “ Cl SrO LioO 0.10 0.37 0.22 0.03 trace or 34 6 ab 43.0 an 0.8 ne 4.8 so 3.0 no 3.6 di 3.7 wo 1.9 mt 2.3 il 1.1 Bull Cliff, Cripple Creek, Colorado. W. F. Hille- brand. W. Cross, 16 A.R.U.S.G.S., II, p. 43, 1895. Trachytic- phonolite. ZrOo so 3 Cl SrO LLO 0.20 0.07 0.24 none trace or 33.4 ab 44,0 an 0.6 nelO. 5 so 3.3 di 0.7 wo 1.6 mt 2.3 Big Bull Mountain, Cripple Creek, Colorado. W. F. Hille- brand. W. Cross, 16 A. R. U. S.G.S.,II, p. 39, 1895. Phonolite. ZrOo so 3 ‘ Cl SrO Li„0 0.20 0.20 0.28 none trace or 31.1 ab 38.3 nel7.2 so 3.9 ac 4.6 di 2.6 Mitre Peak, Cripple Creek, Colorado. W. F. Hille- brand. W. Cross, 16 A. R.U. S. G. S.,II, p. 39, 1895. Phonolite. ZrOo so 3 Cl SrO LioO 0.17 0.12 0.58 none trace or 32.8 ab 40.3 ne 10.2 so 8.0 di 1.2 wo 1.2 mt 1.4 il 0.6 Near Straub Moun¬ tain, Cripple Creek, Colorado. W. F. Hille- brand. W. Cross, 16 A. R. U. S. G. S.,II, p. 39, 1895. Phonolite. ZrOo S0 3 Cl SrO LioO 0.09 trace ? 0.14 trace trace or 31.1 ab 44.5 ne 14.2 di 2.0 wo 1.5 mt 1. 4 hml.3 Rhyolite Mountain, Cripple Creek, Colorado. W. F. Hille- brand. W. Cross, 16 A. R. U. S. G. S., II, p. 39, 1895. Phonolite. 14128-No. 14—03 14 210 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS I. PERSALANE—Continued. * RANG 1. PERALKALIC. MIASKASE—Continued. No. ■ Si0 2 A1A Fe 2 0 3 FeO MgO CaO Na 2 0 o \4 h 2 0+ 1 I O N k—i C0 2 TiO, PA MnO BaO Sum Sp. gr. 24 56. 24 21.43 2.01 0. 55 0.15 1.38 10. 53 5. 74 0. 86 0.12 0. 26 0. 06 0. 08 0. 08 99. 86 2.619 Al. I .937 .210 .013 .008 .004 .025 .170 .061 .003 .001 .001 22° 25 58. 40 20. 25 1. 78 2. 41 0. 49 3.11 7.01 5. 39 0.57 0. 27 none 0. 25 0. 20 trace trace 100. 21 Al. I .973 .198 .011 .033 .012 .056 .113 .057 .003 .001 — — 26 52. 83 20. 70 2. 84 1.19 0.41 1.00 9. 94 4. 87 5.13 0. 37 0.15 0.16 0.03 trace 99.68 Al. I .880 .203 .018 .017 .010 .018 .160 .052 .002 _ 27 53.10 22.50 5.10 n. d. 0.15 2.15 8. 49 6. 48 1. 65 100. 43 A4. IV .885 . 221 .032 (.064) .004 .038 .137 .069 28 52. 75 22. 55 3. 65 n. d. 0.15 1.85 8.10 7. 05 3. 60 1 99. 70 A4. IV .879 .221 .022 (.044) .004 .033 .131 .075 29 60. 84 20. 03 1.47 0. 42 0.45 1. 56 9.12 4.48 1.15 0.11 99.64 2. 683 A3. Ill 1.014 .196 .009 .005 .011 .028 .147 .047 30 56. 67 22. 42 1.82 0. 80 1.33 0. 28 8.52 7.32 1.18 0. 24 0.01 trace 100. 59 A2. II .945 .220 .011 .011 .033 .005 .137 .078 .003 — — 31 53. 96 21.78 0. 62 2. 55 0. 54 1.93 8.61 7. 02 2. 29 1.03 trace 0.15 100. 48 2. 578 A 2. II .899 .214 .004 .035 .014 .034 .139 . 075 .012 — .002 18°. 32 54.20 21. 74 0. 46 2. 36 0. 52 1.95 8. 69 6. 97 2. 32 1.04 trace 0.11 100.36 2. 578 A2. 11 .903 .213 .003 .033 .013 .035 .140 .074 .012 — .002 18°. 55 33 53.71 21.82 0. 78 2.47 0. 56 1.90 8.52 7.07 2. 27 1.03 trace 0.19 100. 32 2.578 A2. II .895 .214 .005 .035 .014 .034 .137 . 075 .012 .003 18°. 5 34 55. 93 21.83 3. 62 0.34 0.61 2. 54 7.84 6. 01 0. 72 0. 03 0.42 0. 22 100.70 2. 62 A2. II .932 .214 . 023 .005 .015 .045 .127 .064 .005 .001 35 61. 03 18. 63 3. 66 n. d. 1.04 1.56 7.68 5.57 0.41 99. 58 A4. IV 1.017 .183 .023 (.046) .026 .028 .124 .059 36 58. 61 21.12 2.62 1.14 0. 79 0. 62 7. 85 5. 93 1.01 1. 10 trace trace 100. 79 A3. Ill .977 .207 .016 .017 .020 .011 .127 .063 .013 — — 37 56. 40 21.36 2. 96 2. 39 0.90 1.81 8. 57 4.83 0. 01 0.84 0. 49 100. 56 A2.II .940 .209 .018 .033 .023 .032 .138 .051 .010 .007 38 56. 26 23. 59 0. 85 2.61 0. 27 0. 54 7. 77 5. 72 0. 37 1.37 0.47 0. 09 99.91 A2.II .938 .231 .005 .036 .007 .009 .126 .061 . 006 .001 39 53. 45 21.28 4.08 n. d. 0.18 1.30 8. 37 5.98 5.20 99.95 A4. IV .891 .208 .026 (.052) .005 .023 .135 .064 40 56. 43 20. 58 2. 88 1.28 0. 28 1.45 8. 62 4.23 2. 90 n.d. 0. 06 0. 66 99. 58 2. 499 A2. II .941 .202 .018 .018 .007 .026 .139 .045 — .009 41 55. 92 20. 35 2.16 0. 94 0. 62 2. 21 8.35 4.83 3.51 trace 0.18 0.50 100. 04 2. 452 AM .932 .200 .014 .013 .016 .039 .135 .052 — .001 .007 PERSALANE-MIASKOSK. 211 ORDER 6. LENDOFELIC. RUSS A RE—Continued. SUBRANG 4. DOSODIC. MIASKOSE—Continued. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. ZrO-> so 3 Cl s SrO 0.09 0.10 0.12 0.03 0.03 or 33.9 ab 22.0 nc32.7 ac 6.0 di 2.9 wo 1.5 Pleasant Valley, Col¬ fax County, New Mexico. W. F. Hille- brand. W. Cross, B. U. S. G. S., 168, p. 171, 1900. Phonolite. ' NoCr 2 O s or NiO. ZrOo so 3 ' Cl none 0.06 0.02 or 31.7 ab 37.7 an 7.8 ne 11.6 di 6.7 ol 0.5 mt 2.9 San Jose, Tamaulipas, Mexico. JI. S. Wash¬ ington. H. S. Washington, Priv. eontrib. Nephelite- syenite. Error, should be viezzenose. so 3 Cl trace 0.06 or 28.9 ab 25.7 ne 29.0 ac 4.2 di 4.2 mt 2.1 San Jose, Tamaulipas, Mexico. H. S. Wash¬ ington. H. S. Washington, Priv. eontrib. Tinguaite. or 38.4 ab 13.1 an 4.2 ne 31.8 di 5.7 ol 4.5 Pocos de Caldas, Minas Geraes, Brazil. J. Machado. J. Machado, T. M. P. M., IX, p. 345, 1888. Neph elite- syenite. or 41.7 ab 11.5 an 4.2 ne31.0 di 4.4 ol 3.1 Pocos de Caldas, Minas Geraes, Brazil. J. Machado. J. Machado, T. M. P. M., IX, p. 334, 1888. Nephelite- syenite. S0 3 0.06 or 26.1 ab 51.9 an 0.6 ne 13.6 di 2.3 wo 1.7 mt 1.2 hm 0.6 Dunmoor Hill, Cheviot Hills, Scotland. I. Macadam. H. Kynaston, Tr. Edin. G. Soc. VII, p. 401, 1899. Biotite- porphyrite. Cl trace or 43 4 ab 23.1 an 1.4 ne 26.4 ol 2.3 mt 1. 9 il 0.5 hm 0.5 Between Monchique and Caldas, Serra de Monchique, Portugal. O. N. Heiden- reich. Kraatz-Koschlau and Hackman, T. M. P. M., XVI, p. 228, 1896. Nephelite- syenite. < Cl s SrO Li 2 0 trace trace trace trace or 41.7 ab 13.6 an 0.3 ne32.1 di 7.8 mt 0.9 il 1.8 Picota, Serra de Monchique, Portugal. P. Jannasch. P. Jannasch, N. J. 1884; II, p. 13. Nephelite- syenite. Mean of next two. Cl S SrO Li,0 trace trace trace trace or 41.1 ab 14.7 ne31.8 di 7.8 mt 0.7 il 1.8 Picota, Serra de Monchique, Portugal. P. Jannasch. P. Jannasch, N. J. 1884, II, p. 13. Nephelite- syenite. Same specimen as No. 33 be¬ low. Cl S SrO Li 2 0 trace trace trace trace or 41.7 abl3.6 an 0.6 ne 31.5 di 7.5 mt 1.2 il 1.8 Picota, Serra de Monchique, Portugal. P. Jannasch. P. Jannasch, N. J. 1884, II, p. 13. Nephelite- syenite. Same specimen as No. 32 above. so 3 Cl. 0.08 0.51 or 35.6 ab 29.3 an 6.4 ne 12.2 so 6.8 di 3.7 wo 0.6 mt 1.2 il 0.8 hm2.9 Forodada, Columbretes Is¬ lands, Spain. R. Pfohl. F. Becke, T. M. P. M., XVI, p. 165, 1896. Trachytic phonolite. or 32.8 ab 44.0 ne 11.4 di 6.7 ol 3.9 Auerdd, n. Holmestrand, Norway. G. Forsberg. W. C. Brbgger, Z. K., XVI, p. 57, 1890. Quartz- syenite- porphyry. Near nordmark- ose. Alkalies high? or 35.0 ab 40.9 an 3.1 ne 13.9 C 0.6 ol 1.4 mt 0.9 il 2.0 hm 1.9 Heum, Laugendal, Norway. O. N. Heiden- reich. W. C.Brogger, Eg. Ivg., Ill, p. 176, 1899. JEgirine- katoforite- foyaite. Cf. remarks, p. 181, loc. cit. • or 28.4 ab 37.7 an 5.6 ne 18.7 di 2.8 ol 1.1 mt 4.2 il 1.5 Poutelitschorr, Kola Penins., Finland. F. Eichleiter. F. Eichleiter, Vh. Wien. G. R-A., XXVII, p. 218,1893. Neph elite- syenite. Cf. Hackman, Fennia, XI, p. 139,1894. or 33.9 ab37.2 an 2.5 ne 15. 6 C 3.6 ol 3.2 mt 1.2 il 0.9 Mt. Sobatchia, Ural Mts., Siberia. Bourdakow. A. Karpinsky. Guide Exc., VII. Cong. G. Int., V, p. 22, 1897. Miascite. so 3 Cl 0.17 trace or 35.6 ab 22.5 an 2.5 ne 26.1 di 3.3 ol 4.2 Engelerkopf, Laacher See, Rh. Prussia. K. Busz. K. Busz, Vh. Nh. Ver. Bonn, XLVIII, p. 236, 1891. Leucite- phonolite. SO.. Cl F 0.22 0.07 trace or 25.0 ab 45.1 an 5.0 nel5.1 di 1.7 mt 4.2 Miigdeberg, Hegau, Germany. G. F. Fohr. G. F. Fohr, In. Diss. Wurzburg, 1883, p. 32. Phonolite. Ti0 2 in Si0 2 so 3 - Cl F Cr,0 3 Cu 0.23 0.06 trace trace 0.18 or 28.9 ab35.6 an 3.6 ne 19.0 di 3.4 wo 2.3 mt 3.2 Staufen, Hegau, Ger¬ many. G. F. Fohr. G. F. Fohr, In. Diss. Wurzburg, 1883, p. 28. Phonolite. 212 CHEMICAL ANALYSES OF IGNEOUS KOCKS. CLASS I. PERSALANE—Continued. RANG 1. PERALKALIC. MIASKASE—Continued. No. Si0 2 A] 2 0 3 Fe,0, FeO MgO CaO Na 2 0 k 2 o h 2 o+ H 2 0- co 2 Ti0 2 PA MnO BaO Sum Sp. gr. 42 55.01 21.67 1.95 1.86 0.13 2. 12 9. 78 3. 54 2.17 0. 27 0. 08 0. 22 99.41 2.513 Al.I .917 .212 .012 .026 .003 .038 .158 .037 .003 .001 .003 43 56. 49 18. 77 3. 00 1.46 0. 63 3.29 7.10 5. 18 1.83 0. 62 1.00 0. 74 0. 27 0.32 100. 70 2.517 A2. II .942 .184 .019 .020 .016 .058 .114 .056 .009 .002 .005 44 58. 33 19. 31 3. 77 0. 69 0. 27 1.15 8.93 5. 08 2. 39 0.04 0.13 0. 02 100. 23 2. 580 A2.II .972 .189 .024 .010 .007 .021 .143 . 055 .002 — 45 55. 46 24.49 2. 63 1.06 0. 05 0. 92 9. 78 5.16 0. 07 0. 20 trace trace 99. 82 A2.II .924 .240 .016 .015 .001 .016 .158 . 056 .003 — — 46 53. 58 25. 26 0.64 1.20 0. 08 1.20 10. 49 5. 28 0.04 0. 79 0. 27 trace 99. 33 B2.III .893 .247 .004 .017 .002 .021 .169 .057 .003 RANG 1. PERALKALIC. MIASKASE. 1 58. 34 23.05 2. 07 n. d. trace 0. 50 12. 22 1. 79 1.53 0.35 trace 0. 66 100.51 A3. Ill .972 2.26 .013 (.026) — .009 .197 .019 .004 — .004 2 60. 29 21.39 3.07 n.d. trace 0. 46 12. 30 trace 0. 67 98.18 D4. Y 1.005 .210 .020 (.040) — .008 .198 — RANG 2. DOMALKALIC. VIEZZENASE. 1 A2. II 53. 76 .896 23. 21 .227 1.27 .008 3.18 .044 0.23 .006 2. 94 .052 6.97 .113 7.01 .074 1. 71 none trace none 100. 34 RANG 2. DOMALKALIC. VIEZZENASE. 1 54. 68 21. 63 2. 22 2. 00 1.25 2. 86 7.03 4. 58 1.88 0. 27 none 0. 79 0. 28 trace 0. 05 99. 81 .09 Al. I .911 .212 .014 .028 .031 .051 .113 .049 .010 .002 — — 99. 72 2 55. 62 20.46 n.d. 4.06 0.62 1.91 7. 64 4. 38 4. 22 0.57 99. 48 A4. IV . 9?7 .200 — .057 .016 .034 .123 .047 3 54.71 22.07 2. 49 2.50 0. 88 2. 52 7.58 5.46 1.13 0. 20 > 99. 54 A3. Ill .912 .216 .016 .035 . 022 .045 .122 .059 4 54. 61 22. 07 2. 33 2. 50 0. 88 2.51 7. 58 5. 46 1.13 0.09 0.15 trace 99.31 B2. Ill .910 .216 .015 .035 .022 .045 .122 .059 .001 .001 — 5 56. 71 22. 49 3. 40 n.d. 1.19 2. 22 7.37 5. 87 0. 45 99. 70 A4. IV .945 .220 .021 (.042) .030 .039 .119 .063 6 56. 04 22.15 1.06 3. 28 1.12 2. 42 8. 39 5.03 0. 67 100.16 A3. Ill .934 .217 .007 .046 .028 .043 . 135 .054 PERSALANE-VIEZZENOSE. 213 ORDER 6. LENDOFELIC. RUSSARE—Continued. SUBRANG 4. DOSODIC. MIASKOSE—Continued. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. S0 3 0.41 Cl 0.08 F trace Cr..0 3 trace Cu 0.12 or 20.6 ab 40.9 an 6.1 ne 18.5 no 2.6 di 3.4 wo 0.8 mt 2.8 il 0.5 Hohentwiel, Hegau, Germany. G. F. Fbhr. G. F. Fbhr, In. Diss. Wurzburg, 1883, p. 28. Phonolite. or 81.1 ab 38.3 an 3.9 ne 11.6 di 3.4 wo 3.3 mt 2,6 il 1.4 hm 1.3 Ziegenberg, n. Nestersitz, Bohemia. F. Hanusch. J. E. Hibsch, T. M. P. M., XIV, p. 97, 1894. Trachytic phonolite. Near nordmark ose and es sexose. S0 3 0.12 or 30.6 ab 41.4 ne 15.1 ac 4.2 di 1.5 wo 1. 6 mt 2.3 hm 0.8 Nagy-Koves, Fiinfkirchen, Hungary. K. Gremse. K. A. Lossen, Z. D. G.G., XXXIX, p. 507,1887. Phonolite. or 31.1 ab31.4 an 4.4 ne27.8 C 1.0 mt 3.7 Gy. Szt. Miklos, Czanod, Sieben- biirgen, Hungary. J. v. Szadeczky. J. v. Szadeczky, Cf. N. J., 1901, I, p. 402. Tinguaite. Cl 0.50 or 31.7 ab 23.1 an 5.8 ne 27.5 so 6.9 C 0.7 ol 1.5 mt 0.9 Ditro, Siebenbiirgen, Hungary; J. v. Szadeczky. J. v. Szadeczky, Cf. N. J., 1901, I, p. 402. Nephelite- syenite. Sum low. SUBRANG 5. PERSODIC. MARIUPOLOSE. or 10.6 ol 2.7 ab 56.6 an 2. 5 ne 25.3 Degemnatt, Kaiser- stuhl, Baden. A. Cathrein. A. Knop, Der Kaiserstuhl, Leipzig, 1892, p. 209. Phonolite. Alkalies interchanged in original? ab 74.9 ol 4.1 an 2.2 ne 15.6 C 0.4 Kaltschik River, Mariupol, Russia. Nikolajew. P. Jeremejeff, B. Ac. Sc. St. Petersb., VII, p. 89, 1897. Nephelite- syenite. Cf. N. J. 1900, I, p. 395. cf. No. 3, tuolumnose. SUBRANG 3. SODIPOTASSIC. Cl SrO Li.,0 0.02 0.04 trace or 41.1 ab 14.1 anll.l ne24.4 di ol mt 2.7 3.1 1.9 “The Ridge,” Mag¬ net Cove, Arkansas. J. F. Williams. J. F. Williams, A. R. Ark. G. S.,1890, II, p. 266, 1891. Tinguaite- porphyry. SUBRANG 4. DOSODIC. VIEZZENOSE. so 3 Cl F 0.07 none 0.22 or 27.2 ab 35.6 an 14.2 ne 12.8 ol mt il 2.6 3.2 1.5 Brookville, New Jer¬ sey. G. Steiger. F. L. Ransome, A. J. S., VIII, p. 423, 1899. Nephelite- syenite. or 26.1 ab 38.8 an 8.3 ne 13. 9 di ol 1.0 6.5 Preston, Black Hills, South Dakota. Flintermann. J. D. Irving, Ann. N. Y. Ac., XII, p. 272, 1899. Tinguaite. Cl trace or 32.8 ab 27.2 an 9.2 nel9.9 di 2.8 Ol 2.5 mt 3.7 Serra de Monchique, Portugal. A. Kalecsinzky. A. Kalecsinzky, F. K., XV, p. 344, 1885. Neph elite- syenite. Same as No. 4 below. Cl trace or 32.8 ab 25.7 an 9.7 ne20.7 di 4.6 Ol 1.9 mt 3.5 Barranco do Banho, Serra de Monchique, Portugal. A. Kalecsinzky. A. Merian, N. J. B. B., Ill, p. 271, 1885. Nephelite- syenite. Same as No. 3 above. TiO *2 from Si0 2 P. 2 0 5 wrongly from Fe./b. or 35.0 ab 28.3 an 10.8 ne 18.5 ol 6.4 Bratholmen, Chris¬ tiania Fjord, Nor¬ way. G. Forsberg. W. C. Brbgger, Z. K., XVI, p. 38, 1890. Ditroite. or 30.0 ab 29.9 an 7.8 ne22.2 di ol mt 3.6 4.6 1.6 Yasvik Tunnel, Laur- vik, Norway. G. Forsberg. W. C. Brogger, Z. K., X VI, p. 38, 1890. Nephelite- rhomben- porphyry. 214 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS I. PERSALANE—Continued. RANG 2. DOMALKALIC. YIEZZENASE—Continued. No. Si0 2 ai 2 o s Fe 2 0 3 EeO MgO Cat) Na 2 0 o s h 2 0+ H 2 0- co 2 Ti0 2 P-A MnO BaO Sum Sp. gr. 7 54.46 19.96 2. 34 3. 33 0. 61 2.12 8.68 2. 76 5.20 trace trace 99.46 A3. Ill .908 . 196 .015 .046 .015 .038 .140 .030 — — 8 57.40 23.09 1.94 n. d. 0.13 1.66 8.12 5.70 1. 18 trace 0.41 trace 100. 20 A3. Ill .957 .226 .013 (.026) .003 .030 .130 .061 .005 — 9 55.19 23. 02 1.23 n.d. trace 2. 70 9.95 4. 48 0. 52 none 0. 63 100. 42 B3. IV .920 .225 .017 (.034) — .048 . 1G0 .048 .008 10 57. 20 20. 04 2. 90 1.20 0. 40 3.19 7.85 4.12 2. 20 trace 0. 22 trace 99.42 2. 578 B2. Ill .953 .196 .018 .017 .010 .057 .127 .043 — .002 — CLASS I. PERSALANE. RANG 1. PERALKALIC. LAUGENASE. 1 53. 54 24.27 1.11 1.24 0. 08 0. 71 8.62 8. 87 1.09 0.14 0. 20 99. 87 A3. Ill .892 .238 .007 .017 .002 .012 .139 .094 RANG 1. PERALKALIC. LAUGENASE. CLASS I. PERSALANE. . SECTION 1. C EXTREME OVER Z. RANG 1. PERALKALIC. 1 A3. Ill 72. 66 1.211 18.98 .186 0. 57 .004 0. 21 .003 0.47 .012 0. 03 0. 21 .003 5.91 .063 0. 86 V 99.94 SECTION 1. C EXTREME OVER Z. RANG 3. ALKALICALCIC. 1 A3. Ill 66. 02 1.100 21.43 .210 4. 62 .029 0.63 .008 1.77 .044 1.81 .032 0.15 .002 CC O m SS -I 0.16 0. 08 99. 88 SECTION 1. C EXTREME OVER Z. RANG 2. DOMALKALIC. 1 54.41 27.04 1.88 0.11 0.51 2.00 1.14 6. 71 3. 36 1,22 0. 54 0. 08 99.37 2. 754 B2. Ill .907 .265 .012 .001 .013 .036 .018 .071 .008 .001 I > K KS ALAN E-DO POT A SSI ('. 215 ORDER 6. LENDOFELIC. RUSSARE—Continued. SUBRANG 4. DOSODIC. VIEZZENOSE—Continued. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. or 16.7 ab 46.6 an 7.2 lie 14.5 di 2.8 ol 3.2 mt 3.5 Njurjavrpachk, Umptek, Kola, Finland. K. Kjellin. V. Hackman, Fennia, XI, p. 158, 1894. Tinguaite. so 3 0.57 or 33.9 ab 35.6 an 8.3 nell.6 no 5.0 C 1.2 ol 2.3 il 0.8 Laacher See, Rh. Prussia. W. Bruhns. W. Bruhns, Vh. Nh. Ver. Bonn, XLVIII, p. 298, 1891. Trachyte. so 3 2.70 Q 2.8 or 26.7 ab 30.4 anil.4 no 24.2 di 1.7 hy 2.5 il 1.2 Laacher See, Rh. Prussia. W. Bruhns. W. Bruhns, Vh. Nh. Ver. Bonn, XLVIII. p. 317, 1891. Nosean- sanidinite. • so 3 Cl trace 0.10 or 23.9 ab 45.6 an 7.2 nell.4 di 2.2 wo 2.5 mt 4.0 Viezzena Valley, Predazzo, Tyrol. M. Dittrich. Osann and Hlawatsch, T. M. P. M., XVII, p. 560, 1898. Neplielite- syenite- porphyry. ORDER 7. LENFELIC. TASMANARE. SUBRANG 3. SODIPOTASSIC. % or 52.2 ab 3.1 an 1.4 di 1.5 ol 0.8 mt 1.6 Near J. M. Henry No. II. S. Washing- H. S. Washington, Foyaite. 2, Magnet Cove, Arkansas. ton. J. G., IX, ne37.8 p. 667, 1901. SUBRANG 4. DOSODIC. LAUGENOSE. or 32.2 ab 21.0 ne36.0 ac 2.8 di 6.9 Brathagen, Laugen- dal, Norway. G. Forsberg. W. C. Brogger, < Z. K., XVI, p. 41, 1890. Foyaite. Also in Eg. Kg., Ill, p. 176, 1898. t or 26.1 ab 14.5 an 2.8 ne 44.9 di 6.4 ol 2.2 mt 3. 5 Laugendal, Norway. G. Forsberg. W. C. Brogger, Z. K., XVI, p. 41, 1890. Nephelite- . porphyry. Loose block. Cf. Eg. Kg., Ill, p. 158, 1898. SUBCLASS II. Q+F+L DOMINANT OVER C+Z. ORDER 3. QUARFELIC. SUBRANG 1. PERPOTASSIC. S0 3 0.02 Q 48.2 hy 1.2 Near Linhope, I. Macadam. H. Kynaston, Quartz-felsite. or 35.0 mt 0. 8 ab 1 6 Cheviot Hills, Scot- Tr. G. Soc. Edin., C 12.2 land. VII, p. 410, 1899. ORDER 3. QUARFELIC—Continued. SUBRANG 1. PERPOTASSIC. > S0 3 0.04 Q 46.6 hy 4.4 or 18.9 mt 1. 9 ab 1.0 • hm3.3 an 8.9 C 14.5 Black Lynn, Cheviot Hills, Scotland. I. Macadam. H. Kynaston, Tr. G. Soc. Edin., VII, p. 394, 1899. Granite. ORDER 4. QUARDOFELIC. SUBRANG 2. DOPOTASSIC. S0 3 0.29 Org 0.10 Q 17.3 hy 1.3 or 39.5 mt 0.2 ab 9.4 hm 1.8 an 10.0 C 14.0 Near Wibbecke, W estphalia. Jacobs. O. Miigge, N. J. B. B., VIII, p. 632, 1893. Quartz-kerato- phyre. Sum low. Not fresh. 216 CHEMICAL ANALYSES OF IGNEOUS ROCKS. CLASS I. FERSALANE—Continued. SECTION 1. C EXTREME OVER Z. RANG 1. PERALKALIC. URALASE. No. Si0 2 A1A Fe 2 0 3 FeO MgO CaO Na 2 0 k 2 o h 2 o+ H 2 0- co 2 Ti0 2 PA MnO BaO Sum Sp. gr. 1 52. 34 16. 05 0.45 n. d. 0.16 0. 20 4. 77 6. 58 0. 40 99. 50 A3. Ill .872 . 157 .003 (.006) . 0C4 .004 .077 .070 2 40. 06 13. 65 0.35 n. d. 0.15 0.30 3.71 5.20 0. 46 99. 28 B3. IV ft .668 .134 .002 (.004) .004 .005 .060 .055 CLASS I. PERSALANE. SECTION 1. C EXTREME OVER Z. RANG 4. DOCALCIC. BORSOWASE. 1 22. 52 16. 31 2.20 n. d. 1.34 6. 64 1.00 0.58 1.58 99. 40 3. 240 B3. IV . 375 .160 .014 (.028) .034 .118 .016 .006 22° RANG 5. PERCALOIC. KYSCHTYMASE. 1 16. 80 13. 89 0. 76 n. d. 0.61 7. 26 0.38 0.13 0. 76 100.10 A3. Ill .280 .136 .005 (.010) .015 .129 .006 .001 PERSALANK-KYSCHTYMASE. 217 SUBCLASS II. Q+F+L DOMINANT OVER C+Z—Continued. ORDER 5. PERFELIC. INDARE. SUBRANG 3. SODIPOTASSIC. URALOSE. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. Corundum 18.65 or 38.9 ol 0.9 ab 37.2 an 1.1 ne 1.7 C 19.2 Nikolskaja Ssopka, Ural Mountains, Siberia. J. Morozewicz. J. Morozewicz, T. M. P. M., XVIII, p. 219, 1898. Corundum- syenite. Corundum 35.40 or 30.6 ol 0.7 ab27.2 an 1.4 ne 2.3 C 36.8 Ilmen Mountains, Ural Mountains, Siberia. J. Morozewicz. J. Morozewicz, T. M. P. M., XVIII, p. 219, 1898. Corundum- pegmatite. SUBCLASS III. Q+F+L EQUAL TO C+Z. ORDER 5. PERFELIC. SIBERARE. SUBRANG 3. PRESODIC. BORSOWOSE. Corundum 47.51 or 3.3 ol 5.2 Borsowska, Ural J. Morozewicz. J. Morozewicz, Kyschtymite. Near kyscbtym- ab 5.2 Mountains, Sibe- T. M. P. M., XVIII, ase. ne 1.7 ria. p. 212, 1898. C 49.5 SUBRANG. NOT NEEDED. Corundum 59.51 or 0.6 ol 2.0 Borsowska, Ural J. Morozewicz. J. Morozewicz, Kyschtymite. Corundum in- an 85.9 no 1 7 Mountains, Sibe- T. M. P. M., XVIII, eludes spinel. C 59.5 ria? p. 212, 1898. 218 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS II. DOSALANE. RANG 1. PERALKALIC. VARINGASE. No. Si0 2 A1A FeA FeO MgO CaO Na 2 0 k 2 o h 2 o+ li 2 o- C0 2 Ti0 2 PA MnO BaO Sum Sp. gr. 1 75. 40 7. 72 1.41 n. d. 1.26 1.55 8. 09 4.52 0. 43 0.12 100. 62 2. 39 A3. Ill 1.257 .076 .009 — .032 .028 .130 .048 .002 2 74.15 10. 07 0. 86 none 0. 30 1.28 6. 64 4. 44 0. 71 trace 0 93 0. 09 0. 26 0. 04 99. 96 Al. I 1.236 .099 .005 •- .008 .023 .107 .047 .011 .001 .004 3 74. 35 8. 73 5. 84 1.00 0. 07 0. 45 4.51 3. 96 0.25 0. 22 99. 38 A3. Ill 1.239 .086 .037 .014 .002 .008 .073 .042 .003 4 70.30 6. 32 9. 23 1.40 0. 89 0. 84 7. 70 2. 50 0. 82 100.00 2. 69 A3. Ill 1.172 .062 . 057 .019 .022 .015 .124 .023 RANG 1. PERALKALIC. VARINGASE. 1 63. 66 7. 81 8.13 3.61 1.85 2. 56 3. 02 2.45 2. 94 3.04 0.31 0. 54 99. 92 A3. Ill 1.061 .076 .051 .050 .046 .046 .048 .026 .002 .008 2 72.12 9. 75 4.11 3. 22 trace 2. 99 3.42 2. 76 0.10 1.83 100.30 2. 706 B3. IV 1.202 .096 .026 .044 — .053 .055 .030 .023 20.4° RANG 2. DOMALKALIC. 66.44 17.43 2.10 1.60 3. 70 0. 65 0. 99 4. 76 2.13 0.10 trace 99.90 1.107 | .171 .013 .022 .093 .012 .016 .051 — RANG 2. DOMALKALIC. 69.27 12. 56 2. 69 4.51 0.91 1.44 3.12 3. 05 0. 76 0. 78 0. 06 trace 99. 35 2. 724 1.155 .123 .018 .062 .023 .026 .050 .033 .010 — — 64. 23 14. 88 8. 46 0. 44 2.35 1.85 2. 11 3. 01 3.19 100. 52 2. 56 1.071 .146 .053 .006 .059 .033 .034 .032 RANG 2. DOMALKALIC. 1 71.24 12. 20 1.71 5.44 0.13 0.98 4. 29 1.86 0. 81 0.97 99. 63 A3. Ill 1.187 .120 .011 . 075 .003 .018 .069 .020 .014 RANG 3. ALKALICALCIC. ALMERASE. 1 63. 75 17.62 3. 00 3. 26 3. 41 2.50 1.75 2.40 2.77 100.45 A3. Ill 1.063 .172 .019 .045 .085 .045 .030 .025 • RANG 3. ALKALICALCIC. ALMERASE. 65. 94 13. 74 0. 49 5.21 2. 33 2.87 2. 80 1.63 2. 59 0.21 0. 59 0. 80 0. 21 0.11 1 0.12 100.25 1.099 .134 .003 .072 .058 .051 .045 .018 .010 .001 .002 .001 Al.I DOSALANE-SITKOSE. 219 SUBCLASS I. Q+F+L EXTREME OVER C+Z. ORDER 3. QUARFELIC. HISPANARE. SUBRANG 3. SODIPOTASSIC. VARINGOSE. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. Cl 0.12 Q 36.7 or 26.7 ab 14.7 ac 14.2 ns 11.4 di 6.0 hy 0.4 S. of Borax Lake, California. W.H. Melville. G. F. Becker, M. XIII, U. S. G. S. p. 159, 1888. Rhyolite-obsid¬ ian. Zr().. none Cl " 0.13 FeS 2 trace CoO none CuO 0.06 Pb none Q 32.6 or 26.1 ab 27.2 ac 2.3 ns 6.1 di 1.7 wo 0.4 tn 2.2 Mazaruni District, British Guiana. J. B. Harrison. J. B. Harrison, Private contribution. Aplite. Dried at 100°. Near grorud- ose. Q 36.5 or 23.4 ab 23.1 ac 13.4 di 2.6 mt 1.9 Varingskollen, n. Ha- kedalen, Norway. G. Sarnstron. W. C. Brogger, Z. K., XVI, p. 66, 1890. Grorudite. Also in Eg. Kg., I, -p. 48, 1894. • Q 29.1 or 14. 5 ab 18.9 ac 26.2 ns 3.9 di 3.5 hy 3.1 Khagiar, Cuddia Nera, Pantelleria. H. Forstner. H. Forstner, Z. K., VIII, p. 173, 1884. Pantellerite. SUBRANG 4. DOSODIC. Q 31.4 or 14.5 ab 25.2 an 0.6 di 9.8 mt 11.7 Near Roztok, Moldau- thal, Bohemia. Strnad. J. Klvana, cf. N. J., 1898, I, p. 485. Quartz-diorite (syenitic). Not fresh. Q, 36.5 or 16.7 ab28.8 an 3.1 di 4.8 wo 2. 7 mt 5.8 Two Mile Flat, Cud- gegong River, New South Wales. A. Liversidge. A. Liversidge, J. R. Soc., N. S. W., XVI, p. 44, 1883. Felsite. Dried at 100°. MnO high. SUBRANG 2. DOPOTASSIC. SnOo trace Q 34.7 or 28.4 ab 8.4 an 3.3 C 9.4 hylO. 5 nit 3.0 Tamaya, Chile. C. Schwarz. v. Groddeck, Z.D.G. G., XXXIX, p. 252, 1887. Dike rock. SUBRANG 3. SODIPOTASSIC. Q 32.8 or 18.3 ab 26.2 an 7.2 C 1.4 hy 6.9 mt 4.2 il 1.5 Sudbury, Ontario. T. L. Walker? T. L. Walker, Q. J. G. S., LIII, p. 56, 1897. Granite. Sum low. Q 33.0 or 17. 8 ab 17.8 an 9.2 C 4.8 hy 5.9 mt 1. 4 hm 7. 5 Wildsruff, Saxony. W. Bruhns. W. Bruhns, Z.D.G.G., XXXVIII. p. 749, 1886. Mica-porphy- rite. Fe. 2 0<, high? FeO low? A1 2 0 3 high? SUBRANG 4. DOSODIC. Q 32.2 di 10.6 Baraboo Bluffs, Wis- W. Daniels. S. Weidmann, Quartz-kerato- MnO high? or 11.1 mt 2.6 ab 36. 2 consin. B. Un. Wise., phyre. an 5.0 Sc. Ser. I, p. 47, 1895. C 1.3 SUBRANG 3. SODIPOTASSIC. ALMEROSE. Q 31.9 hy 12.0 Hovazo, Cabode Gata, J. Savelsberg. A. Osann, Cordierite- or 13.9 mt 4.4 ab 15 7 Almeria, Spain. Z. D. G. G., XL, andesite. an 12.5 p. 701, 1888. C 7.4 SUBRANG 4. DOSODIC. SITKOSE. FeS 2 0.41 NiO trace SrO trace Li 2 0 trace Org. 0.20 Q 30.1 hy 13.6 or 10.0 mt 0. 7 ab 23.6 il 1.5 an 14.2 C 2.0 Indian River, Sitka, Alaska. W. F. Hille- brand. G. F. Becker, 18 A. R. U.S.G.S.III, p. 45, 1898. Diorite. 220 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS II. LOSALANE—Continued. RANG 4. DOCALCIC. No. Si0 2 A1.A FeA FeO MgO CaO Na 2 0 k 2 o h 2 o+ h 2 o- co 2 Ti() 2 pa MnO BaO Sum. Sp. gr. 1 A3. Ill 64.38 1.073 14. 09 .138 6.10 .038 3.68 .051 2. 04 .051 4. 51 .080 0.55 .009 3. 72 .039 0. 82 0. 33 .005 100. 22 RANG 4. DOCALCIC. 1 63. 05 14.31 1.32 6. 65 4.38 3. 91 2.06 0.82 2. 54 100. 20 A3. Ill 1.051 .140 .008 .093 .110 .070 .033 .009 2 55. 39 16.81 9.87 2.60 3. 22 6.03 0. 83 0. 62 1.07 0. 93 2.19 0.69 100. 25 2. 78 A?2. II?G? .923 .165 .062 . 036 .081 .107 .013 .006 .026 .005 RANG 5. PERCALCIC. GORDONASE. 1 69. 87 12. 02 1.42 3.49 2.30 7. 86 0. 66 0.11 0. 89 0.18 0. 43 0. 69 0.17 0.16 none 100. 25 Al.I 1.165 .118 .009 .049 .058 .140 .010 .001 .009 .001 .002 — CLASS II. DOSALANE. RANG 1. PERALKALIC. PANTELLERASE. 1 71.10 11.39 5. 33 n. d. 1.54 0. 08 3. 95 6. 37 0.44 0. 57 0.05 100. 82 B2. Ill 1.185 .112 .033 (.031) .039 .001 .064 .067 .007 — • 2 70.15 10. 60 5. 77 1. 74 0. 35 0. 72 5. 30 4. 09 trace 0.65 0. 52 99. 89 A2. II 1.169 .104 .036 .024 .009 .013 .085 .043 .008 .007 3 66. 50 10. 90 9. 85 2. 34 0. 60 0.64 5. 56 4. 54 0. 20 trace trace trace 101. 23 B2. IV 1.108 .107 .062 .033 .015 .011 .090 .048 — — — 4 61. 83 14.80 1.83 5.31 2. 69 0. 73 3. 57 4. 54 2.49 0. 08 1.17 0.23 99. 55 2. 656 A2. II 1.031 .145 .011 .074 .067 .012 .058 .048 .014 .002 5 66.10 13. 45 6.30 0.45 0. 92 0. 60 5.42 5. 04 2.10 100. 38 A3. Ill 1.120 .132 .039 .006 .023 .011 .087 .054 6 69. 61 8.02 7.17 2. 83 0. 65 0. 88 7.47 2. 88 0. 74 100.25 2.44 A3. Ill 1.160 .078 .045 .039 .016 .016 .120 .031 7 69. 02 10. 09 4. 42 4. 56 0. 76 1.45 6. 29 3. 70 n. d. 100.58 2.46 A3. Ill 1.150 .099 .027 .063 .019 .026 .101 .039 RANG 1. PERALKALIC. PANTELLERASE. 1 63. 56 11. 72 4.90 1. 10 3. 65 4. 12 6.44 2. 30 0. 81 0. 79 0.18 trace 0. 24 0. 01 99.99 Al. I 1.059 .115 .030 .015 .091 .073 .104 .024 .002 — .003 — 2 66. 73 12. 23 1.31 4.18 1.49 3. 25 6.14 2.53 0. 62 0.05 0. 32 0. 22 99.46 A2. II 1.112 .120 .008 .058 .037 .058 .099 .026 .004 .002 3 67. 89 11.53 4.51 4.52 0. 62 1. 51 5. 79 3. 71 0. 33 100. 41 2. 43 A3. Ill 1.132 .113 .028 .062 .016 .027 .093 .039 4 67. 48 9. 70 7. 42 2.21 0. 77 1.45 7.21 2.94 0. 96 100.14 2. 68 A3. Ill 1.125 .095 .046 .030 .019 .026 .116 .031 DOS A L A NE-PANTKL L EROSE. 221 ORDER 3 QUARFELIC. HISPANARE—Continued. SUBRANG 1. PREPOTASSIC. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. Q 33.7 or 21.7 ab 4.7 an 22.2 C 1.0 hy 6.8 mt 8.8 Brockenrod, Hesse. F. Kutscher. C. Chelius, Erl. G. Kt., Hesse, V., Bl. Breusbach, p. 24, 1897. Granite. * • SUBRANG 3. PRESODIC. SnOo CuO" 0.22 0.94 Q 27.8 or 5.0 ab 17.3 an 19.5 C 2.9 hv 22.2 mt 1.9 Burgstein, n. Klein- wenden, FIrzgebirge, Saxony. Hilger. F. v. Sandberger, Sb. Munch. A. K., XVIII, p. 444, 1888. Gabbro. Not fresh. Q 32.6 or 3.3 ab 6.8 an 25.6 C 5.5 hy 8.1 mt 2.3 il 4.0 hm 8.3 Frauenberg, n. Breit- first, Hesse. R. Wedel. R. Wedel, Jb. Pr. G. L-A., XI, p. 23, 1892. Trachydolerite. Alkalies low? Fe.A high? SUBRANG. NOT NEEDED. so 3 Cl S SrO LioO none none none none trace Q 45.7 or 0.6 ab 5.2 an 29.7 di 7.7 hv 6.3 mt 2.1 il 1.4 Near Sweden, Gordon County, Georgia. H. N. Stokes. A. FI. Brooks, B. U. S. G. S. 168, p. 55, 1900. Meta-quartz- diorite. ORDER 4.—QUARDOFELIC.—AUSTRARE. SUBRANG 3. SODIPOTASSIC. GRORUDOSE. Q 22.4 or 37.3 ab 23.6 ac 8.8 hy 7.0 il 1.1 Fort Davis, Apache Mountains, Texas. A. Osann. A. Osann, T. M. P. M., XV, p. 447, 1895. Liparite. Q 25.4 or 23.9 ab 32.0 ac 11.1 di 3.0 mt 2.6 il 1.2 Grussletten, n. Grorud, Christiania, Norway. V. Schmelck. W. C. Brdgger, Eg. Kg., I, p. 48, 1894. Grorudite. Center of dike. Q 18.8 or 26.7 ab 30.9 ac 14. 3 di 2.4 hy 0. 6 mt 7.2 Grussletten, n. Grorud, Christiania, Norway. V. Schmelck. W. C. Brdgger, Eg- Kg., I, p. 48, 1894. Grorudite. Bolder of dike. S0 3 0.18 Q 15.3 or 26.7 ab 30.4 an 3.3 C 2.8 hyl3.2 mt 2.6 il 2.2 Siipplingen, n. Magde¬ burg, Prussia. Hampe. F. Klockmann, Jb. Pr. G. L-A., XI, p. 159, 1892. Porphvrite. S0 3 for S. Q. 15.5 or 30.0 ab 40.9 ac 4.2 di 2.3 hy 1.2 mt 1.4 hm 3. 8 Holbak, Siebenbiir- gen, Hungary. C. v. John. C. v. John, Jb. G. R-A. Wien., XLIX, p. 566, 1899. Sanidinite. Q 24.8 or 17.2 ab 24.6 ac 20.8 ns 3.5 di 3.8 hy 4.8 Khagiar, Cuddia Nerar, Pantelleria. H. Forstner. H. Forstner, Z. K., VIII, p. 173, 1884. Pantellerite. CuO 0.29 Q 19.6 or 21.7 ab 31.4 ac 12.1 ns 1.7 di 6.3 hy 7.0 Cuddia Mida, Pantel¬ leria. H. Forstner. H. Forstner, Z. K., VIII, p. 182, 1884. Pantellerite. SUBRANG 4. DOSODIC. PANTELLEROSE. ZrO., Cl s CoO Cu Pb trace 0.06 none 0.08 0.03 none Q 9.2 or 13.3 at) 47. 7 ac 6.0 di 15.5 hy 1.8 mt 3.5 Mazaruni District, British Guiana. J. B. Harrison. J. B. Harrison, Priv. contrib. Hornblende- granitite- gneiss. Dried at 110°. FeS 2 0.39 Q 13.6 or 14.5 ab 49.3 ac 2.3 di 13.5 hy 3.7 mt 1.3 Wallbach, Backofen- berg, Hesse. W. Sonne. C. Chelius, Erl. G. K. Hesse, V. Bl. Breusbach, p. 24, 1897. Granite. Q 16.9 or 21.7 ab 38.8 ac 8.8 di 6.5 hy 5.3 mt 2.1 Mte. San Elmo, Pan¬ telleria. H. Forstner. H. Forstner, Z. K., VIII, p. 186, 1884. Pantellerite. Q 17.4 or 17.2 ab 33.5 ac 21.3 ns 0.8 di 6.2 hy 2.8 Mte. San Elmo, Pan¬ telleria. H. Forstner. FI. Forstner, Z. K., VIII, p. 186, 1884. Pantellerite. 222 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS II. DOSALANE—Continued. RANG 2. DOMALKALIC. DACASE. No. Si0 2 A1 2 0 3 Fe 2 G 3 FeO MgO CaO Na 2 G K.,0 H 2 Of H.,0— C0 2 Ti0 2 FA MnO BaO Sum Sp. gr. 1 65. 63 13. 85 2.02 2. 80 2. 79 3. 43 1.84 6. 25 1.17 trace trace trace 99. 77 2. 864 A3. Ill 1.094 .136 .013 .039 .070 .060 .029 .067 — — — 2 63. 25 10. 37 2. 77 2.71 9. 92 1.24 1.55 4. 90 4.03 0.34 101.08 2. 696 B2. Ill 1.054 .102 .017 .038 .248 .022 .025 .052 .004 RANG 2. DOMALKALIC. DACASE. it 1 64. 47 10.51 1.11 7.37 5.21 3. 10 2. 21 3.63 0. 75 0.18 0.58 0. 65 0. 25 0.15 0. 04 100. 37 Al. I 1.075 .103 .007 .103 .130 .055 .035 .038 .008 .002 .002 — 2 62. 35 13. 24 3.52 6.33 0. 85 3. 34 2. 79 3.95 1.21 0.11 1.18 0. 57 0. 08 0.16 99. 68 Al. I 1.039 .130 .022 .088 .021 .059 .045 .012 .014 .004 .001 .001 3 57.98 13. 58 3. 11 8. 68 2. 87 2. 01 3.56 3. 44 2. 47 1.75 0. 29 0.13 0. 04 99.91 Al. I . 966 .134 .020 .121 .072 .036 . 057 .036 .022 .002 .002 — 4 61.09 15.34 5. 74 3. 69 1.33 3.10 3. 41 3. 65 1.80 99.15 B3. IV 1.018 . 150 .035 .051 .033 .055 . 055 .039 5 62.18 15. 77 1.83 2.44 3. 55 4.13 3. 92 3.91 0. 70 0. 30 0. 55 0. 32 trace 0. 43 100. 23 Al. I 1.036 .154 .011 .033 .089 .073 .063 .041 .007 .002 — .003 6 59.24 13. 84 5. 46 1.36 4. 79 5. 60 3.13 4. 22 2. 02 none 0. 22 0.34 trace trace 100. 34 Al. I .971 .136 .034 .019 .120 .100 .050 .045 .003 .002 — 7 63. 97 15. 78 2. 35 1.87 2. 84 3. 71 4. 36 4.01 0. 49 0. 09 0. 48 0. 40 100. 40 A2. II 1.066 .155 .015 .026 .071 .055 .070 .043 .006 .003 8 63. 05 15.58 2.92 2. 11 1.70 4.15 3. 77 3. 66 1.38 0. 55 0. 60 0. 27 0.12 0.13 100.06 Al. I 1.051 .153 .018 .030 .043 .074 .061 .039 .007 .002 .002 .001 9 60.16 13.18 8. 88 3.15 1.03 3. 89 3. 42 3. 53 1.90 0. 20 trace 0.22 99. 56 A2. II 1.003 .129 .055 .044 .026 .070 , 055 .037 .003 — .003 10 65.00 13. 73 0. 44 2.19 0. 82 4.43 3. 70 4. 82 1.08 3.15 0.47 0.08 trace 100.12 2. 622 A2.II 1.083 .135 .003 .030 .021 .078 .059 .051 .006 .001 11 60. 96 13. 93 1. 56 3. 65 1.59 3.98 2.83 4. 23 2.14 3.27 1.16 0. 29 trace 99. 75 2. 625 A2.II 1.016 .137 .010 .051 .040 .071 .045 .045 .014 .002 -— 12 64. 76 17.06 1.06 3. 63 2. 99 2. 74 3. 67 3. 60 1.74 101. 25 B3. IV 1.079 .107 .007 .050 . 075 .049 .059 .038 13 62. 44 15. 60 2.09 3. 43 2. 11 1.70 3. 99 4. 21 2. 60 0.62 0. 88 0.16 99. 95 2. 652 A2.II 1.041 .153 .013 .046 .053 .030 .064 .045 .011 .001 14 61.41 14. 54 1.96 i 5.80 2.03 1.33 3. 86 4. 68 2. 48 0. 88 0.98 0.26 100. 21 2. 663 A2.II 1.02C .143 .012 .080 .051 .024 .062 .050 .012 .002 DOS A L A N E-A D A M E;, LOS E. 223 ORDER 4. QUARDOFELIC. AIJSTR ARE—Continued. SUBRANG 2. DOPOTASSIC. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. Q. 19.3 or 37.3 ab 15.2 an 11.1 di 4.6 by 8.2 mt 3.0 Follmersdorf, Silesia. IL Traube. H. Traube, N. J., 1890, I, p. 212. Hornblende- syenite. Q 17.0 or 28.9 ab 13.1 an 6.1 C 0.3 hy27.0 mt 3.9 il 0.6 Gierniger Loch, Ba¬ den. M. Dittrich. F. Schalch, Sp. Ivt. Ba¬ den, Bl. Petersthal, p. 33, 1895. Quartz-mica- syenite.. Border facies, Cf. No. 67, liparose. SUBRANG 3 SODIPOTASSIC. ADAMELLOSE. ZrO., S none 0.12 Q 20.4 or 21.1 ab 18.3 an 8.3 di 5.7 hy21.8 mt 1.6 il 1.2 Fort Ann Quadr., Es¬ sex County, New York. W. F. blille- brand. J. F. Kemp, Priv. contrib. Syenite. Cr.,0 3 NiO SrO LLO none none trace trace Q 21.5 or 23.4 ab 23.6 an 12.0 hy 9.1 mt 5.1 il 2.2 ap 1.3 Near Banner’s Elk, Watauga County, North Carolina. LI. N. Stokes. A. Keith, B. U. S. G. S. 168, p. 52, 1900. Rhyolite. SrO LioO trace trace Q 11.1 or 20.0 ab 29.9 an 10.0 C 0.5 by 17.7 mt 8.0 il 3.4 Pigeon Point, Minne¬ sota. W. F. Hille- brand. • W. S. Bayley, A. J. S., XXXVII, p. 61, 1889. Quartz-diorite. Dried at 150°. Also in B. U. S. G. S. 109, p. 63, 1893. Q 17.7 or 21.2 ab 28.8 an 15.3 hy 5.4 mt 8.1 Pigeon Point, Minne¬ sota. Dodge and Si- dener. M. E. Wadsworth, B. G. Nh. S. Minn. 2, p. 82, 1887. Gabbro? so 3 Cl SrO trace 0.04 0.16 Q 11.2 or 22.8 ab 33.0 an 13.9 di 5.3 hy 8.1 mt 2. 6 il 1.1 Steamboat Mountain, Little Belt Moun¬ tains, Montana. W. F. Hille- brand. L. V. Pirsson, 20 A. R. U. S. G. S., Ill, p. 517, 1900. Diorite-por¬ phyry. so 3 Cl SrO 0.08 0.04 none Q 9.5 or 25.0 ab 26.2 an 11.4 di 11.2 by 7.0 mt 3. 9 il 0.3 hm 2.7 ap 0.6 Willow Creek, High- wood Mountains, Montana. Hurlbut and Barnes. L. Y. Pirsson, B. U. S. G. S. 148, p. 152, 1897. Trachy-andes- itic breccia. NiO trace Q 12.9 or 23.9 ab 36.7 an 11.7 di 2.9 hy 6.5 mt 3.5 il 0.9 Hurricane Ridge, Crandall Basin, Yell. Nat. Park. W. H. Mel¬ ville. J. P. Iddings, M.U.S.G. S., XXXII, p. 261, 1889. Quartz-mica- diorite. SrO Li 2 0 0.07 trace Q 16.6 or 21.7 ab 32.0 an 14.7 di 4.7 hy 2.7 mt 4.2 il 1.1 Cliff Creek, West Elk Mountains, Colo¬ rado. W. F. Hille- brand. W. Cross, 14 A. R. U. S. G. S., 11, p. 227, 1894. Hornblende- mica-porphy- rite. Q 19.1 or 20.6 ab 28.8 an 10.3 di 5.5 wo 0.8 mtl0.2 hm 1.7 Svardfall, Brefven, Sweden. K. Winge. K. Winge, G. F. F., XVIII, p. 195, 1896. Monzonite. so 3 0.21 Q 16.7 or 28.4 a b 30.9 an 7.0 di 9.7 wo 1.3 mt 0.7 il 0.9 Norheim, Nahethal, Rhenish Prussia. ■ Hesse. K. A. Lossen, Z. D. G. G., XLIII, p. 537, 1891. Quartz- porphyry. S0 3 for S. Not fresh. S0 3 0.16 Q 17.5 or 25.0 ab 23.6 an 13.1 di 5.7 hy 4.8 mt 2.3 il 2.2 Weiselberge, n. Ober- kirchen, Rhenish Prussia. K. Bottcher. K. A. Lossen, Z. D. G. G., XLIII, p. 537, 1891. Porphyrite. S0 3 for S. Not fresh. Q 16.9 or 21.1 ab 30.9 an 13.6 C 2.1 hy 13.2 mt 1.6 Lippenhof, n. Try berg, Schwarzwald, Ba¬ den. Gattermann. G. H. Williams, N. J. B. B.,II, p. 624, 1883. Mica-diorite. Not in Roth. so 3 0.12 Q 15.1 or 25.0 ab33.5 an 8.3 C 1.4 hy 8.4 mt 3.0 il 1.5 Bullerberg, n. Magdeburg, Prussia. Hesse. F. Klockmann, Jb.Pr. G.L-A., 1890, XI, p. 210, 1892. Augite- porphyrite. S0 3 for S. so 3 trace Q 11.6 or 27.8 ab 32.5 an 6.7 C 1.1 hy 12.4 mt 2.8 il 1.8 Altenhausen, n. Magdeburg, Prussia. G..F. Steffen. F. Klockmann, Jb. Pr. G.L-A., 1890, XI, p. 159, 1892. Porphyrite. L 224 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS II. DOSALANE—Continued. RANG 2. DOMALKALIC. DACASE—Continued. No. Si0 2 A1A Fe.A FeO MgO CaO Na 2 0 k 2 o H 2 0+ H 2 0- C0 2 Ti0 2 PA MnO BaO Sum Sp. gr. 15 58. 58 15. 26 5.61 3. 28 3. 02 0. 98 2. 45 3.80 5.14 1.38 0.37 99. 94 2.674 A2.II .976 .150 .035 .046 .076 .018 .040 .040 .017 .003 16 57.12 15. 40 2. 80 4.39 5. 13 2. 24 2. 84 3. 77 4. 35 0. 75 1.17 0. 22 100. 26 2. 625 A2. II .952 .151 .017 .061 .128 .040 .046 .040 .014 .002 17 55. 47 13. 86 5. 98 2.64 3.65 2. 75 3. 63 4. 35 2.94 3. 25 1.19 0. 22 100. 07 2.683 A2.II .925 .136 .037 .037 .091 .049 .058 .047 .014 .002 18 62.51 12. 78 2. 56 4. 76 3.33 4. 76 2.71 4. 81 1.53 0. 81 trace trace 100. 59 2. 901 A2.II 1.042 .125 .016 . 066 .083 .085 .043 .051 .010 — — 19 67.94 14. 86 1.60 3. 62 1.91 2. 02 2. 52 4. 01 1.57 100. 05 A3. Ill 1.132 .146 .010 .050 .048 .036 .040 .042 20 65. 02 15. 23 1.01 3.12 1. 84 2. 88 2. 92 6.09 2.15 trace 0.05 100. 31 A3. Ill 1.084 .149 .006 .043 .046 .051 .047 .065 . _ ■ .001 21 61. 45 14. 36 2. 75 4. 61 2. 73 4.34 3. 98 3. 75 0. 87 • 1.37 100. 21 A3. Ill 1.024 .141 .017 .064 .068 .077 .064 .040 .017 • •» RANG 2. DOMALKALIC. DACASE. 1 67. 76 14.00 n. d. 5.18 1.00 4. 28 5. 22 1.19 1.01 0.46 0.19 trace 100. 29 2. 709 A3. Ill 1.129 .137 — .072 .025 .077 .084 .013 .006 .001 — 2 64. 95 15.44 2. 02 1.60 2. 65 3. 07 4. 25 3. 87 0. 85 0.26 0.39 0.25 trace 0. 35 100.11 Al. I 1.083 .151 .013 . 022 .066 .055 .069 .041 .005 .002 — .002 3 64. 47 15. 45 2. 25 2. 25 2. 68 3. 63 4. 54 3.19 0, 63 0. 05 0. 75 0. 22 0. 06 0. 23 100.44 Al. I 1.075 .151 .014 .031 .067 .065 .073 .034 .009 .002 .001 .002 4 65.50 14.94 1.72 2. 27 2. 97 2.33 5. 46 2. 76 1.13 0.24 0.45 0. 09 0. 20 0.13 100.25 Al. I 1.092 .146 .011 .032 .074 .042 .088 .029 .006 .001 .003 .001 5 61.56 14. 73 4.47 1.23 3. 57 4. 87 5.10 2.24 1.42 0. 87 0.04 0.34 100.44 A2. II 1.026 .144 .028 .017 .089 .087 .082 .024 .011 — .005 6 63.18 16.47 2.36 2. 28 1.33 4. 77 4. 40 2. 93 0. 60 0. 27 0. 60 0. 28 0.15 0.15 99. 86 Al. I 1.053 . 162 .015 .032 .033 .085 .071 .031 .008 .002 .002 .001 7 62. 92 14.29 0. 84 4. 66 3.14 2. 72 4. 30 1.39 2. 84 0. 22 1.24 0. 84 0. 13 0.15 0.10 100.10 Al I 1 057 .140 .005 .065 .079 .049 .068 .015 .010 .001 .002 .001 8 68. 58 13. 04 0. 26 3. 40 1.01 3. 22 4.94 1.90 1.00 0.16 1.31 0.57 0. 20 0.15 0.10 99. 99 Al. I 1.143 .128 .002 .048 .025 . 057 .079 .020 .007 .001 .002 .001 9 62.16 16.12 3.39 1.85 2. 93 4. 59 5. 20 2.29 1.12 trace 0. 23 0.16 0. 20 0. 07 100. 36 Al. 1 1.036 .158 .021 .026 .073 .082 .084 .024 .003 .001 .003 — 10 63. 50 15. 34 3. 22 1.71 2.50 4,31 4. 84 2.75 1.99 100. 16 A3 III 1.058 .150 .020 .024 .063 .077 .077 .030 DOSALANE—DACOSE. 225 ORDER 4. QUARDOFELIC. AUSTRARE—Continued. SUBRANG 3. SODIPOTASSIC. ADAMKLLOSE—Continued. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. so 3 0.07 Q 23.0 or 22.2 ab 21.0 an 5.0 C 5.3 hy 7.6 nit 6.7 il 2.6 hm 1 . 0 Zissendorfer Berg, n. Magdeburg, Prussia. Fischer. F. Klockmann, Jb. Pr. G. L-A., 1890, XI, p. 210, 1892. Porphyrite. S0 3 for S. Not fresh. so 3 0.08 Q 11.9 or 22.2 ab 24.1 an 11.1 C 2.6 hyl6.7 nit 3.9 il 2.2 Bosenberg, Harz Mountains. Jacobs. K. A. Lossen, Jb. Pr. G. L-A., X, p. 266, 1892. Porphyrite. S0 3 for S. Not fresh. so 3 0.14 Q 14.6 or 26.1 ab 19.9 an 8.6 di 3.9 hy 7.3 mt 5.3 il 2.2 hm 2.2 Spiemont, Harz Mountains. Iv. Bottcher. K. A. Lossen, Jb. Pr. G. L-A. 1889, X, p. 266, 1892. Porphyrite. S0 3 for S. Not fresh. Q 14.3 or 28.4 ab 22.5 an 8.6 di 12. 5 hy 7.4 mt 3.7 il 1.5 Reichenstein, Silesia. H. Traube. 11. Traube, N. J., 1890, I, p. 206. Hornblende- syenite. Q 28.8 or 23.4 ab 21.0 an 10.0 C 2.9 hy 10.1 mt 2.3 Raffernertobel, n. Meran, Tyrol. M. Dittrich. E. Kiinzli, T. M. P. M., XVIII, p. 418, 1899. Granitite- gneiss. Q 14.5 or 36.1 ab 24.6 an 10.3 di 3.2 hy 7.8 mt 1.4 Monte Amiata, Tuscany. L. Ricciardi. L. Ricciardi, Gaz. Chim. Ital., XVIII, 1888. Trachyte. Q 11.3 or 22.2 ab 33.5 an 10.3 di 9.1 hy 6.4 mt 3.9 il 2.6 Latitude 36° 3CK N., longitude 80° E., Thibet. H. Backstrom. H. Backstrom, Pet. Mit. Erg. Hft., No. 131, p. 2,1900? Bronzite- an desite. SUBRANG 4. DOSODIC. DACOSE. Q 20.3 or 7.2 ab 44.0 an 11.1 di 7.8 hy 6.8 il 0.8 Sudbury, Ontario. Not stated. T. L. Walker, Q. J. G. S., L1II, p. 56, 1897. Granite. Nearly in SR 5 so 3 1 Cl SrO 0.02 0.04 0.10 Q 15.4 or 22.8 ab 36.2 an 11.4 di 3.2 hy 5.7 mt 3.0 il 0.8 Bear Park, Little Belt Mountains, Montana. H. N. Stokes. L. V Pirsson, 20 A. R. IT. S. G. S., Ill, p. 519, 1900. Diorite-syenite- porphyry. SrO 0.04 Q 14.3 or 18.9 ab 38.3 an 12.2 di 4.8 hy 6.0 nit 3.2 il 1.4 Big Timber Creek, Crazy Mountains, Montana. W. F. Hille- brand. J. E. Wolff, B. U. S. G. S., 148, p. 142, 1897. Hornblende- granitite. so 3 ! SrO 0.06 trace Q 13.7 or 16.1 ab46.1 an 8.1 di 3.1 hy 8. 0 mt 2.6 il 0.9 Sepulchre Mountain, Yellowstone Na¬ tional Park. T. M. Chatard. J. P. Iddings, 12 A. R. U. S. G. S., I, p. 648, 1891. Hornblende- mica-ande¬ site. Q. 10.6 or 13.3 ab 43.0 an 10.6 di 10.7 hy 4.0 mt 1. 6 il 1.7 hm3.4 Tower Creek, Yel¬ lowstone National Park. F. A. Gooch. J. P. Iddings, M.U.S.G.S., XXXII, p. 272, 1899. ' Hornblende- andesite. SrO 1 . Li 2 0 0.09 trace Q 15.2 or 17.2 ab 37.2 an 16. 7 di 5.7 hy 1.7 mt 3.5 il 1.2 Sierra Carrizo, Ari¬ zona. W. F. Hille- brand. W. Cross, 14 A. R. U. S. G. S., p. 165, 1894. Hornblende- porphyrite. FeS 2 NiO SrO Li 2 0 0.32 trace trace trace Q 19.9 or 8.3 ab 35.6 an 13.6 C 0.8 hyl4.5 mt 1.2 il 1.5 pr 0.3 Bear Creek, Cook’s Inlet, Alaska. W. F. Hille- brand. G. F. Becker, 18 A. R. U. S.G. S., Ill, p. 45, 1898. Diorite. FeS» SrO 0.15 trace Q 23.9 or 11.1 ab41.4 an 8.1 di 6.7 hy 4.3 mt 0, 5 il 1.1 Near Latrobe, Eldorado County, California. W. F. Hille- brand. II. W. Turner, 14 A. R. U. S. G. S., II, p. 473, 1894. Porphyrite. Also in J. G., Ill, p. 403, 1895. ZrO> Cl FeS a CoO Cu Pb trace 0.02 trace 0.01 0.02 none Q 10.7 or 13.3 ab 44.0 an 13.9 di 7.1 hy 4.6 mt 4. 9 Mazaruni District, Ilritisb Guiana. J. B. Harrison. J. B. Harrison, Priv. contrib. Ilornblende- granitite. Dried at 100°. Near akerose. Q 13.7 or 16.7 ab 10. 7 an 12.0 di 6.3 hy 3.3 mt 4.6 Chiles Volcano, Colombia. R. Kiich. R. Kiich, G. Stud. Colomb., I, p. 172, 1892. Pyroxene- horn blende- dacite. 1 14128 — No. 14—03 - 15 226 CHEMICAL ANALYSES OF IGNEOUS ROCKS. CLASS II. DOSALANE—Continued. RANG 2. DOMALKALIC. DACASE—Continued. No. Si0 2 A1A Fe 2 0 2 FeO MgO CaO Na, 2 0 k 2 o h 2 o+ A 2 0- CO, TiO, P-A MnO BaO Sum Sp. gr. 11 63. 49 12. 42 6.41 1.34 1.32 4.17 4. 90 X. 78 2. 88 trace 0. 85 99. 56 2. 52 A3. Ill 1.058 .121 .040 .018 .033 .075 .079 .019 — .012 15° 12 63. 41 16. 92 2. 67 2. 96 2.08 4. 32 5.18 2. 36 0. 64 100.54 A3. Ill 1.057 .166 .017 .041 .052 .077 .084 .024 13 64.17 14. 73 0. 57 5. 83 2.09 3. 76 3.81 3. 35 2. 24 100.55 A3. Ill 1.070 .144 .004 .080 .042 .067 .061 .036 14 64. 94 17.50 0. 69 3.94 2. 83 2.59 3.44 3.11 1.36 100. 40 A3. Ill 1.082 .172 .004 .055 .071 .047 .055 .032 15 59. 94 16. 11 4. 29 2. 68 3. 02 1.74 4. 78 2. 55 3. 07 0.40 1.44 0.24 100.43 2. 651 A2. II .999 .158 .027 .038 .076 .030 .077 .027 .017 .002 16 61. 31 16. 34 2. 23 3.17 2. 07 2.43 4. 86 2.96 3. 08 1.08 0. 77 0. 27 100. 93 2. 624 A2. II 1.022 .160 .014 .044 .052 .043 .078 .032 .009 002 17 63.94 •13. 05 2. 45 7.52 0. 43 3.35 4. 45 3.68 0. 34 0.93 0.12 100. 26 A3. Ill 1.006 .128 .015 .104 .011 .060 .072 .039 .006 .002 18 67. 38 15. 46 3. 66 n. d. 1.03 4. 72 4.98 2.14 0. 41 0. 04 0. 29 100.11 A4. IV 1.123 .151 0.23 (.046) .026 .084 .080 . 023 — .004 19 64. 06 15. 25 2. 72 4. 30 1.30 3. 93 4.37 2. 78 1.70 0.18 100. 59 2. 352 A3. Ill 1.068 .149 .017 .059 .032 .070 .070 .031 . 002 • RANG 2. DOMALKALIC. DACASE. 1 64. 49 14. 26 3.91 ' 3. 28 1.25 3. 67 6. 60 0. 40 1.22 99.08 B3. IV 1.075 .140 . 025 .046 .031 .066 .106 .004 RANG 3. ALKALICALCIC. TONALASE. 1 57. 33 15.31 3. 39 8.19 4. 36 3.95 1.22 4.57 1.80 100.12 A3. Ill .956 .150 .021 .114 .109 .071 .020 .049 • 2 54. 36 14. 71 1.89 6. 11 7. 92 2. 42 1.18 4. 62 4.05 0. 47 0. 96 0. 52 99. 64 2. 755 A2. II .906 .144 .012 .085 .198 .043 .019 .049 .012 .003 3 58.46 14. 38 3. 75 6. 67 1.59 5.24 1.33 3. 40 2. 03 3. 40 0. 36 (100.61) A3. Ill F .974 .141 .024 .093 .040 .093 .021 .036 .005 100.45 DOSALANE-SR 2 OF TONALASE. 227 ORDER 4. QUARDOFELIC. AUSTRARE—Continued. SUBRANG 4. DOSODIC. DACOSE—Continued. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. S0 3 trace Cl trace CuO trace Q 20.3 or 10.6 ab 41.4 an 6.4 di 7.2 wo 2.2 mt 4.2 hm 3.5 Yate Volcano, Pata¬ gonia. H. Ziegenspeck. H. Ziegenspeck, In. Diss. Jena, p. 46, 1883. Augite- andesite. Q, 11.9 or 13.3 ab 44.0 an 16.1 di 4.5 by 6.2 mt 3. 9 Inchnadarnpf, Assynt, Scotland. J. J. H. Teall. J. J. H. Teall, G. M., XXIII, p. 350, 1886. Hornblende- porphyrite. Q 15.4 or 20.0 ab 32.0 an 13.1 di 4.7 hy 11.8 mt 0. 9 Foglo, Aland, Fin¬ land. H. Berghell. B. Frosterus, G. F. F., XV., p. 285, 1893. Granite. Near adam- ellose. Q 20.6 or 17.8 ab 28.8 an 13.1 C 3.7 hyl3.8 mt 0. 9 Lippenhof, n. Try- berg, Schwarzwald, Baden. G. H. Williams. G. H. Williams, N. J. B. B., II, p. 624, 1883. Mica-diorite. S0 3 0.17 . Q 14.3 or 15.0 ab 40.3 an 8.3 C 2.4 hy 7.6 mt 4.9 il 2.6 hml.O Gerach, Fischbach Thai, Rhenish Prussia. K. Gremse. K. A. Lossen, Jb. Pr. G. L-A., X, p. 290, 1892. Porphyrite. S0 3 for S. S0 3 0.14 Org 0.02 Q 12.2 or 17.8 ab 40. 9 an 12.0 C 0.7 hy 8.0 mt 3.2 il 1.4 Horst, Blatt Lebach, Prussia. K. Gremse. Weiss & Greve, Erl. G. K. Pr., Bl. Lebach, p. 32, 1889. Hornblende- porphyrite. S0 3 for S. Q, 14.5 or 21. 7 ab37.7 an 4.7 di 6.1 hy 9.7 mt 3.5 ap 1. 9 Bomb, Eruption 1889-9, Vulcano, Alolian Islands. L. Ricciardi. G. Mercalli, Gior. Min., Ill, p. 107, 1892. Andesite. Near pantel- lerose. Q 18.1 or 12.8 ab 41.9 an 13.3 di 8.6 hy 4.2 Bomb, Eruption 1888-9, Vulcano, TEolian Islands. L. Ricciardi. G. Mercalli, Gior. Min., Ill, p. 107, 1892. Andesite. Q 15.9 or 17.2 ab 36.7 an 13.3 di 5.0 hy 6.1 mt 3. 9 Kakoperato, Aegina, Greece. A. Rbhrig. H. S. Washington, J. G., Ill, p. 150, 1895. Hornblende- dacite. SUBRANG 5. PERSODIC. Q 16.0 or 2.2 ab 55.5 an 8.3 di 8.1 hy 1.9 mt 5.8 White Island, New Zealand. W. A. McLeod. W. A. McLeod, Tr. N. Z. Inst., XXXI, p. 488, 1899. Hypersthene- andesite. Sum low. SUBRANG 2. DOPOTASSIC. LLO trace Q 11.9 or 27.2 ab 10.5 an 19.7 C 1.0 hy 23.2 mt 4.9 Dorsey’s Run, How¬ ard County, Mary¬ land. W. F. Hille- brand. C. R. Keves, 15 A. R. U. S. G. S., p. 722, 1895. Inclusion in granite. - so 3 c 0.38 0.05 Q 9.2 or 27.2 ab 10.0 an 12.0 C 3.3 hy27.8 mt 2.8 il 1.8 ap 1.1 Michaelstein, Lower Harz Mountains. F. Steffen. M. Koch, Jb. Pr. G. L-A. 1886, VII, p. 68, 1887. Iversantite. S0 3 for S. Q 20.8 or 20.0 ab 11.0 an 23.4 di 2.2 hy 12.0 mt 5.6 Dolanky, Molclau- thal, Bohemia. Plaminek. J. Klvana, Cf. N. J., 1898, I, p. 485. Dioritic quartz- syenite. Not fresh. 228 CHEMICAL ANALYSES OF IGNEOUS HOCKS. CLASS II. DOSALANE—Continued. RANG 3. ALKALICALCIC. TONALASE. No. Si0. 2 Al.A Fe 2 0 ;1 FeO MgO CaO Na/) k 2 o h 2 o+ H,0— co 2 TiO, P-A MnO BaO Sum Sp. gr. 1 56. 20 15.46 1.54 9. 76 1.83 5.39 2. 78 2.56 0. 59 0.16 none 2. 25 1.13 0.13 0.17 100. 02 Al. I .937 .151 .010 .137 .046 .096 .045 .027 .027 .008 .002 .001 2 58. 77 13.12 5. 45 6. 87 4. 93 5. 99 1.94 2. 83 0. 45 100.35 • A3. Ill .980 .129 .034 .096 .123 .107 .031 .030 3 64. 34 15. 72 1.62 2.94 2.17 4. 24 2. 76 4. 04 0. 76 0. 25 0. 03 0. 53 0.14 0.12 0. 06 99.81 Al. I 1.072 .154 -.010 .041 .054 .076 .044 .042 .007 .001 .002 — 4 64.17 15. 25 2.16 2. 98 2. 60 4. 24 2.62 4.34 0. 65 0.16 none 0. 67 0.16 0. 04 0.07 100. 18 Al. I 1.070 .149 .014 .042 .066 .076 .042 .046 .008 .001 .001 .001 5 63. 87 15. 39 1.93 3. 08 2. 23 4. 30 2. 76 4.18 0. 69 0.19 0.15 0. 65 0.17 0.11 0. 07 99. 92 Al. I 1.065 .151 .012 .043 .056 .077 .044 .045 .008 • .001 .002 .001 6 61.64 15. 63 3. 39 2.69 2. 82 4.90 2. 64 3. 72 0.91 0.28 none 0. 71 0.21 0.04 0. 08 99. 70 Al. I 1.027 .153 .021 .038 .072 .087 .042 .039 .009 .002 .001 .001 7 60.17 15. 78 3. 42 2. 95 2.52 4. 69 2. 96 4.16 1.23 0. 25 0. 87 0. 40 0.11 0.14 99. 79 Al. I 1.003 .154 .021 .042 .063 .084 .048 .045 .011 .003 .002 .001 8 59. 76 15. 79 3. 77 3.30 2.16 3. 88 3. 01 4.40 1.11 0. 31 0. 78 0. 87 0. 42 . 0.12 0. 09 99. 83 Al. I .996 .155 .024 .046 .054 .070 .048 .047 .011 .003 .002 .001 9 57. 80 16.43 1.62 6. 51 4.14 7.21 2.35 2. 29 0.31 0.11 none 0. 70 0.19 0.18 0. 09 100. 03 Al. I .963 .161 .010 .090 .104 .128 .038 .024 .009 .001 .003 .001 10 57. 26 16.51 3. 27 5.19 3.41 6. 69 2. 65 2.93 0. 95 0. 20 0. 53 0.30 0.18 0.10 100. 23 Al. I .954 .162 .020 .072 .085 .120 .043 .031 .007 .002 .003 .001 11 63. 85 15. 84 1.91 2. 75 2.07 4. 76 3. 29 3. 08 1.65 0. 28 0. 58 0.13 0. 07 0. 06 100. 36 Al. I 1.064 .155 .012 .039 . 052 . 085 .053 .033 .007 .001 .001 — 12 58. 55 15.48 3. 93 2. 07 3. 60 6.44 1.69 3. 99 3. 62 0. 83 0.30 0.11 100.61 A2. II . 976 .152 .024 .030 .090 .115 .027 .042 .010 .002 .002 13 62.6 17. 7 1.2 3.3 3.4 4.6 2.5 3.7 0. 7 99.7 2. 76 A3. Ill 1.043 .174 .007 .046 .085 .082 .040 .039 14 55. 95 19. 35 4.60 3. 00 2. 52 5.40 2.86 2.64 1.05 2. 80 0. 21 100.38 B2. Ill .933 .190 .029 .042 .063 .096 .046 .028 .034 .003 15 57.69 14. 48 4.40 1.71 5.63 5. 42 2. 73 2. 94 3. 44 0.11 0. 82 0. 29 99. 88 2. 66 A2. II .962 .142 .027 .024 .141 .096 .043 .031 .010 .002 16 57.64 14. 49 3.17 .5. 81 4.62 8. 02 2.13 2.32 1.77 0.13 0.31 0. 23 100. 64 2. 837 A2. II .961 .142 .020 .080 .116 .143 .034 .024 .004 .002 17 57.28 15. 98 2. 35 5. 06 5.52 2.84 2.37 3. 42 4.22 0.41 1.01 0.18 100.64 2. 653 A2. II . 955 . 157 . 015 .071 .138 .050 .039 .036 .012 .001 18 56.91 15.54 2. 32 4.98 5. 71 5.80 2.45 2. 74 2.29 1.09 0. 21 100.19 2. 791 A2. II .959 .152 .014 .070 .143 .103 .040 .029 .013 .002 DOSALANE—HARZOSE. 229 ORDER 4. QUARDOFELIC. AUSTRARE—Continued. SUBRANG 3. SODIPOTASSIC. HARZOSE. Inc usive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. so. Cl F s SrO trace trace trace 0.07 trace Q 12.1 or 14.0 ab 23.6 an 22.0 hyl7.8 mt 4.3 il 4.2 ap 2.3 Walleska, Cherokee County, Georgia. PI. N. Stokes. A. H. Brooks, B. U. S. G. S. 168, p. 55, 1900. Quartz-gabbro. Near tonalose. Q 15.2 or 16.7 ab 16.2 an 18.9 . di 8.9 hy 16.2 mt 7.9 St. Cloud, Minnesota. Dodge and Sidener. M. E. Wadsworth, B. G. Nh. S. Minn., Il, p. 86, 1887. Gabbro. Dark portion. Cf. No. 7, ton¬ alose. ZrO» S SrO Cu 0.02 0.03 0.03 0.01 Q 20.0 or 23.4 ab 23.1 an 18.9 di 1.9 hy 7.7 mt 2.3 il 1.1 Atlantic Mine, Butte, Montana. H. N. Stokes. W. H. Weed, J. G., VII, p. 739, 1899. Granite. Complete in B. U.S. G.S.168 p. 117,1900. so. Cl SrO 0. 07 trace trace Q 19.2 or 25.6 ab 22.0 an 17.0 di 3.5 hy 7.5 mt 3.2 il 1.2 Frohner Mine, Hel¬ ena, Montana. H. N. Stokes. W. IL Weed, J. G., VII, p. 739, 1899. Granite. ZrOo S SrO Cu 0.03 0.07 0.04 0.01 Q 19.4 or 25.0 ab 23.1 an 17.2 di 4.5 hy 6.3 mt 2.8 il 1.2 Alice Mine, Butte, Montana. H. N. Stokes. W. H. Weed, J. G., VII, p. 739, 1899. Granite. Complete in B. U.S. G.S.168, p. 117, 1900. SO, SrO none 0.04 Q 17.5 or 21.7 ab 22.0 an 22.8 di 1.3 hy 7.6 mt 4.9 il 1.4 Red Rock Creek, Butte, Montana. H. N. Stokes. W. II. Weed, J. G., VII, p. 739, 1899. Diorite. V»0, SrO Li 2 0 0.01 0.09 trace Q 13.6 or 25.0 ab 25.2 an 17.0 di 5.3 hy 5.0 mt 4. 9 il 1.7 Tintic Mountain, Tintic District, Utah. H. N. Stokes. Tower and Smith, 19 A. R. U. S. G. S., Ill, p. 641, 1899. Andesite. v 2 o, SrO MoO Li 2 0 0.02 trace trace trace Q 14.6 or 26.1 ab 24.1 an 16.7 di 2.4 hy 5.8 mt 5. 6 il 1.7 Iron Duke Mine, Tintic District, Utah. H. N. Stokes. Tower and Smith,' 19 A. R. U. S. G. S., Ill, p. 647, 1899. Monzonite. FeSo NiO' SrO LioO none 0.03 trace? trace Q 11.3 or 13.3 ab 19.9 an 27.5 di 6.7 hy 16.6 mt 2.3 il 1.4 E. of Sonora, Tuo¬ lumne County, California. W. F. Hille- brand. H. W. Turner, 17 A. R. U. S. G. S., I, p. 724, 1896. Quartz - pvrox- ene-cliorite. Near maryland- ose. SrO Li 2 0 0.06 trace Q 10.3 or 17.2 ab 22.5 an 24.5 di 7.3 hy 10.9 mt 4.6 il 1.1 E. of Milton, Sierra County, California. W. F. Hille- brand. II. W. Turner, 17 A. R. U. S. G. S., I, p. 724, 1896. Quartz -mica- diorite. FeS, SrO Li 2 0 0.04 trace trace Q 19.3 or 18.3 ab 27.8 an 19.2 di 3. 7 hy 6.1 mt 2.8 il 1.1 Grass Valley, Nevada County, California. W. F. Hille- brand. W. Lindgren, 17 A. R. U. S. G. S., II, p. 44, 1896. Granodiorite. Q 16.4 or 23.4 ab 14.1 an 23.1 di 6.9 hy 5.8 mt 4.6 il 1.5 hm 0.6 Cedar Hill Ridge, Washoe, Nevada. G. E. Moore. G. F. Becker, M. U. S. G. S., Ill, p. 152, 1882. Hornblende- andesite. Q 16.9 or 21.7 ab 21.0 an 22.8 C 1.3 hyl3.6 mt 1.6 Ben Damhaim, Loch Garabal, Scotland. J. H. Player. Dakyns and Teall, Q. J. G. S., XLVIII, p. 115, 1892. Hornblende- granitite. I One decimal. Q 13.7 or 15.6 ab 24.6 an 26.7 C 2.0 hy 6.3 mt 1.9 il 5.2 hm3.3 Fjulsrud, Humledal, Norway. t G. Sarnstrom. W. C. Brbgger, Z. K., XVI, p. 53, 1890. Porphyry. Ti0. 2 high? SO, Org 0.17 0.05 Q 12.8 or 17.2 ab 22.5 an 18.9 di 6.0 hyll.3 mt 3.2 il 1.5 hm 2.0 Peterberg, Bl. Wa- dern, Rh. Prussia. K. Bottcher. H. Greb, Erl. G. K. Pr. Bl. Wadern, p. 34, 1889. Bronzite-por- phyrite. S0 3 for S. SO, trace Q 12.6 or 13.3 abl8.4 an 23.4 di 13.4 hy 13.0 mt 4. 6 Ole Padde, Harz Mountains. F. Steffen. K. A. Lossen, Jb. Pr. G. L-A., X, p. 290, 1892. Augi te- tonal ite. SO, trace Q. 13.4 or 20.0 ab 20.4 an 13.9 C 3.3 hy 19. 6 mt 3.5 il 1.8 Steinhubel, St. Wen- del, Harz Moun¬ tains. Hesse. K. A. Lossen, Jb. Pr. G. L-A., X, p. 266, 1892. Diorite - por- phyrite. SO, 0.15 Q 10.5 or 16.1 ab 21.0 an 22.5 di 5.0 hvl7. 5 mt 3.1 il 2.1 Bolmke Thai, Wer- nigerode, Harz Mountains. K. Harppe. K. A. Lossen, Jb. Pr. G. HA., X, p. 309, 1892. Enstatite-por- phyrite. SO s for S. 230 CHEMICAL ANALYSES OF IGNEOUS ROCKS. CLASS II. DOSALANE—Continued. RANG 3. ALKALICALCIC. TONALASE—Continued. No. Si0 2 A1A Fe 2 0 3 FeO MgO CaO Na 2 0 W to O h 2 o+ I L,<) co 2 Ti0 2 p 2 o 5 MnO BaO Sum Sp. gr. 19 65.87 14. 88 1.77 3.11 2. 93 4. 61 2.12 4. 22 0. 83 0. 43 trace 100. 77 2. 899 A3. Ill 1.098 .146 .011 .043 .073 .082 .034 . 045 .005 20 62.69 12. 77 3. 22 4. 79 3. 09 5.02 2.39 3. 63 1.06 1.22 trace 0. 60 100.48 2. 952 A2. II 1.045 .125 .020 .067 .077 .089 039 .038 .015 — .009 21 60. 58 11.92 3.05 8.14 3. 88 6.97 1.21 2. 55 0. 95 1.14 trace 0. 63 101. 02 2. 926 B2. Ill 1.010 .117 .020 .112 .097 .125 .019 .027 .013 — .009 22 63. 06 18. 01 2.48 1.31 4. 55 2. 72 2.01 3. 88 2. 20 100. 22 A3. Ill 1.051 .176 .016 .018 .114 .048 .032 .041 23 60.01 17.05 1.83 4.15 1.12 6. 58 2. 31 5.12 1.40 0. 42 0. 09 100. 12 2. 543 B3. IV 1.001 1.67 .011 .058 .028 .118 .037 .055 .003 .001 24 55. 23 14.06 5. 06 4.12 4.00 9.34 2. 07 2. 43 1.07 1.33 0. 57 100.12 A3. Ill .921 .138 .032 .057 .100 .166 .034 .025 .009 .008 25 60. 68 16.19 5.37 1.58 2.96 5. 88 3.11 3. 95 0. 98 100. 70 2. 640 A3. Ill 1.011 .159 .034 .022 .074 .105 .050 .042 17° 26 62. 43 17.88 1.78 3. 53 4. 50 3. 43 3.10 2. 75 1.37 trace trace 100. 77 2. 74 A3. Ill 1.041 .175 .011 .049 .113 .049 .050 .030 — — 27 57. 69 15. 65 7.42 2.41 3.10 6. 92 2. 33 2.37 1.59 0. 22 trace 99. 73 2. 779 A3. Ill .962 .153 .046 .033 .077 .123 .037 .025 . 002 — RANG 3. ALKALICALCIC. TONALASE. 1 58.59 15.04 3.94 3. 48 4.49 5. 29 3.20 2.90 1.96 0.55 0. 22 99.66 A2. II .977 .147 .024 .049 .112 .094 .051 .030 .007 .002 2 59. 77 15. 38 2.65 3.44 4. 40 4. 81 3. 61 2. 83 1.51 0. 53 0. 21 99.14 A2. II -.996 .150 .017 .048 .110 .086 .058 .030 .007 .002 O O 59. 71 15.41 2. 63 3. 52 4.36 4. 90 3. 55 2. 80 1.52 0. 60 0. 22 99. 22 A2. II .994 .151 .016 .049 .109 .0S7 .057 .030 .007 .002 4 61.40 16. 59 2.13 3. 05 2. 73 6.17 3. 83 1.34 0. 88 0. 82 none 0. 79 0. 20 0.13 0. 02 100.10 Al.I 1.023 .163 .013 .042 .063 .110 .061 .015 .010 1 .001 .002 -— 5 56. 78 14. 33 5. 76 9. 27 1.58 5. 26 3. 43 1.75 0.10 0. 33 1.44 0. 36 0. 25 100.64 A2. II .946 .140 .036 .129 .040 .094 .055 .019 .017 .002 .004 •6 66. 68 14. 93 1.58 3. 32 2.19 4.89 2.65 2. 05 1.09 0.16 0. 50 0.10 0.10 0. 08 100. 32 Al. I l.lil .146 .010 .046 .055 .087 .043 .021 .006 .001 .001 .001 7 61.19 15. 22 3. 20 3. 55 2. 38 7.94 3.17 2. 62 0. 40 trace 99.67 A3. Ill 1.020 .149 .020 .060 .060 .142 .051 . - 027 — 8 60. 32 15.80 5.42 0. 89 5. 08 4. 65 4.09 1.82 1.67 0.12 99. 86 A3. Ill 1.005 . 155 .034 .012 .127 .083 .066 .020 .001 DOSALANE—TONALOSE. 231 ORDER 4. QUARDOFELIC. AUSTRARE—Continued. SUBRANG 3. SODIROTASSIC. HARZOSE—Continued. Inclusive. Norm. Local it y. Analyst. Reference. Author’s name. Remarks. Q 22.5 or 25.0 ab 17.8 an 18.6 di 3.5 hy 9.2 ml 2.6 il 0.8 Wachberg, Drosch- kau, Silesia. H. Traube. H. Traube, N. J. 1890, I, p. 218. Syenite. Q 19.6 or 21.1 ab 20.4 an 16.1 di 7.0 hy 8.6 mt 4.6 il 2.2 Near Neudeck, Silesia. H. Traube. II. Traube, N. J., 1890, I, p. 220. Syenite. Q 21.7 or 15.0 ab 10.0 an 19.7 di 12.8 hyl3. 7 mt 4.6 il 2.0 Neudeck, Silesia. H. Traube. H. Traube, N. J., 1890, I, p. 222. Syenite. Q 23.9 or 22.8 ab 16.8 an 13.3 C 6.6 hvll. 8 nit 3.7 Arnsdorf, Riesenge- birge, Silesia. Herz. L. Milch, N. J. B. B., Nil, p. 223, 1899. Schliere in granitite. Q 11.6 or 30.6 abl9.4 an 20.9 di 7.4 hy 5.2 mt 2.6 ap 1.1 San Magno, Latera Crater, n. Lake Bolsena, Italy. L. Ricciardi. C. Klein, Sb. Berl. Akad., 1888, p. 99. % Trachyte. Alkalies low? Also in N. J. B. B., VI, p. 10, 1889. S0 3 01 0.84 trace Q 13.4 or 13.9 ab 17.8 an 22.0 di 13.4 hy 7.0 nit 7.4 ap 2.8 Radicofani, Tuscany. L. Ricciardi. G. Mercalli, Att. Soc. It. Sc. Nat., XXX, p. 375, 1887. Andesite. PA high? Q 12.8 or 23. 4 ab 26.2 an 18. 6 di 8.2 hy 3.6 mt 5.1 hm 1.9 Mount Pagos, Smyr¬ na, Asia Minor. H. S. Washing¬ ton. H. S. Washington, A. J. S., IIi, p. 43, 1897. Augite-ande- site. Dried at 110°. Q 17.4 or 16.7 ab 26.2 an 16.7 C 3.6 hyl6.3 mt 2.6 Ensay, Omeo, Victoria. A. W. Howitt. A. W. Howitt, Tr. R. Soc. Viet., XXII, p. 99, 1886. Quartz-mica- diorite. Dried at 100°. Near tona- lose. Q 18.0 or 13.9 ab 19.4 an 25.3 di 6.9 hy 4.5 mt 9.8 Tambo River, Omeo, Victoria. A. W. Howitt. A. W. Howitt, Tr. R. Soc. Viet., XX, p. 31, 1884. Quartz-mica- diorite. Dried at 100°. SUBRANG 4. DOSODIC. TONALOSE. Q 12.1 or 16.7 ab 26.7 an 18.3 di 6.3 hyl0.5 mt 6.6 il 1.1 Average of igneous rocks of the earth. Various ana¬ lysts. F. W. Clarke, B. U. S. G. S. 78, pp. 37 and 38, 1891. Cf. B. U. S. G. S. 148, p. 12, 1897. Q 11.3 or 16.7 ab 30.4 an 17.2 di 5.5 hyll.4 mt 3.9 il 1.1 Average igneous rock of the United States. Chemists of U.S.G. S. . F. W. Clarke, B. U. S. G. S., 148, p. 12, 1897. H. 2 0 above 110° Q 11.2 or 16.7 ab29.9 an 17.8 di 5.3 hyll.8 mt 3.7 il 1.1 Average igneous rock of the United States. Chemists of U.S.G. S. F. W. Clarke, B. U. S. G. S., 168, p. 14, 1900. H 2 0 above 110°. ZrOo S Cro0 3 v.o 8 SrO none none trace 0.02 trace? Q 17.3 or 8.3 ab 32.0 an 24.2 di 5.3 hy 6.2 mt 3.0 il 1.5 Edmunds Hill, Aroostook County, Maine. W. F. Hille- brand. H. E. Gregory, A. J. S., VIII, p. 365, 1899. Andesite. Also in B. U. S. G. S., 165, p. 171, 1900. Q 13.6 or 10.6 ab 28.9 an 18.3 di 6.7 hylO. 6 mt 8.4 il 2.6 Rocky Hill, Somerset County, New Jersey. A. H. Phillips. A. H. Phillips, A. J. $., VIII, p. 279, 1899. Diabase. SrO LUO trace trace Q 28.4 or 11.7 ab 22.5 an 22.8 di 1.1 hy 8.9 mt 2.3 il 0.9 Rowlandsville, Cecil County, Maryland. W. F. Hille- brand. G. H. Williams, 15 A. R. U. S. G. S., p. 672, 1895. Biotite-granite. • Q 14.3 or 15.0 ab 26.7 an 19.7 di 16.2 hy 3.3 mt 4.6 St. Cloud, Minnesota. Dodge and Sid- ener. M. E. Wadsworth, B. G. Nh. S. Minn., 2, p. 86, 1887. Gabbro. Light portion cf No. 2, harzose. Q 12.6 or 11.2 ab 34.6 an 19.2 di 3.1 hyll.3 mt 2.8 hm3.5 Epsilon Lake, Lake County, Minnesota. J. A. Dodge. N. H. Winchell, 21 A. R. G., Nh. S. Minn., p. 58, 1893. Porphyrite. 232 CHEMICAL ANALYSES OF IGNEOUS ROCKS. CLASS II. DOSALANE—Continued. RANG 3. ALKALICALGIC. TOXALASE—Continued. No. Si0 2 A1 2 0 3 Fe 2 0 3 FeO MgO CaO Na 2 0 K 2 0 H 2 0 + h 2 o- co 2 Ti0 2 PA MnO BaO Sum Sp. gr. 9 59. 48 16. 37 3.21 3.17 3. 29 4. 88 3. 30 2.81 2.01 0. 93 0.41 0.19 0.13 100. 21 Al. I .991 .160 .020 .044 .082 .087 .053 .030 .012 .003 .003 .001 10 65.11 16.21 1.06 3.19 2. 57 3. 97 4. 00 2.51 0. 94 0. 71 0. 02 none 100. 33 Al. I 1.085 .159 .007 .044 .064 .071 .064 .027 .009 — — n 64. 07 15.82 3. 40 1.44 3. 39 4. 43 4. 06 2. 27 0. 42 0. 10 0. 45 0. 18 trace 100. 08 A2. II 1.068 .155 .021 .020 .085 .079 .065 1024 .006 .001 — 12 61.22 16.14 3.01 2. 58 4.21 5. 46 4.48 1.87 0.40 0.04 0.61 0. 25 trace 100. 36 A2. II 1.020 .158 .019 .036 .105 .098 .072 .020 .008 .002 — 13 58.49 16. 70 3. 85 2.37 3.12 5. 90 3.47 1.59 2,44 1. 71 trace 0. 24 100. 52 Al. I .975 .164 .024 .033 .078 .105 . 056 .017 .021 •- i .003 14 56. 28 14. 23 4. 69 4. 05 6. 37 7. 94 2. 98 1.23 0.93 0. 84 0. 40 0.16 100.28 .04 - Al. I .938 ,140 .029 .056 .159 .142 .048 .013 .010 .003 .002 100.24 15 60. 30 16.31 4.35 1.41 2. 39 5. 62 3.99 2.36 1.86 0. 64 0. 76 0.20 0.13 0.15 100.57 Al. I 1.005 .160 .027 . 020 .060 .100 .064 .025 .009 .001 .002 .001 16' 56. 61 13.62 5.89 2. 60 5.48 6. 61 3.13 2.71 1.07 1.20 0. 79 0. 06 0. 35 0.14 100. 31 Al. I .944 .134 .037 .036 .137 .118 .050 .029 .010 — .005 .001 17 55. 83 17.11 4. 07 3. 75 5. 05 7.40 2.94 1.71 1.28 1.05 0. 21 none 100. 40 A2. II .931 .168 .025 .052 .126 .132 .047 .018 .013 .002 — 18 61.16 16.17 2. 89 2.18 3. 89 • 4. 26 3. 87 3. 20 2. 09 0. 23 0.13 trace 100.07 A2. II 1.019 .159 .018 .030 .097 . 076 .062 .034 .003 .001 — 19 61.45 15. 07 4. 46 1. 18 3. 02 5.37 4. 00 1. 22 1.23 2. 80 trace none 100.14 A2. II 1.024 .148 .028 .017 .076 .096 .064 .013 .035 — — 20 60.15 17. 85 2.00 2. 02 3. 26 5.48 3.95 2. 36 1.24 0. 25 none 0. 47 0. 22 0.07 0. 20 99. 62 Al. I 1.003 .175 .013 .028 .082 .098 .064 .025 .006 .002 .001 .001 21 60.00 16. 37 2. 28 2. 46 3.81 4. 96 3. 73 2. 70 1.42 0.61 0.17 0. 59 0. 35 0. 05 0. 26 99. 87 Al. I 1.000 .160 .014 .034 .095 .089 .059 .029 .007 .002 .001 .002 16° 22 64.81 15. 73 1.68 2.91 2.82 4.22 3. 98 1.43 0. 62 1.08 0. 08 0. 23 0.08 100.61 2. 740 Al. I 1.080 .154 .011 .040 .071 .075 .064 .015 .001 .002 .001 23 63.16 17.21 2. 43 2.30 1.27 6. 27 4. 70 1.84 0. 69 0.21 0. 12 trace 0. 09 100. 29 Al. I 1.053 .169 .015 .032 .032 .112 .076 .020 .003 .001 — .001 • 24 62.88 17.13 1.86 2. 58 1.48 5.39 4. 50 2. 25 0. 42 0.16 none 0.51 0. 26 0.16 0.16 99. 86 Al. I 1.048 .168 .012 .036 .037 .096 .072 .024 .006 .002 .002 .001 25 59.42 16. 79 3. 23 3.29 2. 24 5. 57 4.15 2. 82 0. 79 0. 27 0. 44 0.68 0. 35 0.13 0.14 100. 38 Al. I .990 ' .164 .020 .046 .046 .100 .067 .030 .008 .002 .002 .001 26 59.19 18. 00 3. 07 2. 32 1.41 6. 55 4.01 2. 74 1.06 0. 46 none 0. 58 0. 29 0.19 0.18 100.18 Al. I .970 .176 .020 .032 .034 .117 .064 .029 .007 .002 .003 .001 DOSALANE-TONALOSE. 233 ORDER 4. QUARDOFELIC. AUSTRARE—Continued. SUBRANG 4. DOSODIC. TONALOSE—Continued. I nclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. Cr»0 3 NiO 0.03 trace Q 14.6 or 16.7 ab 27.8 an 21.4 hylO.O mt 4. 6 il 1.7 ap 1.0 Red Bluff, Madison County, Montana. L. G. Eakins. G. P. Merrill, Pr. IJ. S. Nat. Mus., XVII, p. 651, 1895. Hypersthene- andesite. Complete in B. (LS.G.S.,148, p. 140, 1897. so 3 Cl Li.,0 trace none 0.04 Q 18.5 or 15.0 ab 33.5 an 18.9 di 0.8 hy 9.7 mt 1.6 il 1.4 Electric Peak, Yellowstone Na¬ tional Park. J. F. Whitfield. J. P. Iddings, 12 A. R. U. S. G. S., I, p. 627, 1891. Quartz-mica- diorite. NiO 0.05 Q 18.2 or 13.3 ab34.1 an 18.3 di 2.9 hy 7.2 mt 3.3 il 0.9 hml.O Electric Peak, Yellowstone Na¬ tional Park. W. H. Melville. J. P. Iddings, 12 A. R. U. S. G. S.,I, p. 627, 1891. Quartz- pyroxene- mica-diorite. NiO 0.09 Q 11.2 or 11.1 ab 37.7 an 18.3 di 7.3 hy 8.5 mt 4.4 il 1.2 Electric Peak, Yellowstone Na¬ tional Park. W. H. Melville. J. P. Iddings, 12 A. R. U. S. G. S.,I, p. 627, 1891. Pyroxene- miea-diorite. S0 3 LinO 0.63 0.01 Q 15.8 or 9.5 ab 29.3 an 25.3 di 3.1 hy 6.4 mt 2.6 il 3.2 hm 2.0 Electric Peak, Yellowstone Na¬ tional Park. J. E. Whitfield. J. P. Iddings, M.U.S.G.S., XXXII, p. 81, 1899. Hornblende- porphyrite. so 3 Cl Li 2 0 trace 0.17 0.01 Q, 10.5 or 7.2 ab 25.2 an 22.0 di 14.2 hyll.3 mt 6.7 il 1.5 Electric Peak, Yellowstone Na¬ tional Park. J. E. Whitfield. J. P. Iddings, 12 A. R. U. S. G. S., I, p. 627, 1891. Pyroxene- mica-diorite. S0 3 0.10 Q 14.4 or 13.9 ab 33. 5 an 19. 7 di 6.3 hy 3.1 mt 2.6 il 1.4 hm 2.6 Sepulchre Mountain, Yellowstone Na¬ tional Park. T. M. Chatard. J. P. Iddings, 12 A. R. U. S. G. S., I, p. 648, 1891. Idornblende- pyroxene- andesite. Cr.,0 3 so 3 Cl LioO 0.05 trace none none Q 9.6 or 16.1 ab 26.2 an 15.3 Q 10.0 or 10.0 ab 24.6 an 28.6 di 13. 7 hy 7.4 mt 6.0 il 1.5 hm 1.8 di 6.7 hy 11.1 mt 5.8 il 2.0 Sepulchre Mountain, Yellowstone Na¬ tional Park. Sepulchre Mountain, Yellowstone Na¬ tional Park. T. M. Chatard. J. E. Whitfield. J. P. Iddings, 12 A. R. U. S. G. S., 1, p. 648, 1891. J. P. Iddings, 12 A. R. U. S. G. S., I, p. 64«, 1891. Hornblende- pyroxene- andesite. Pyroxene- andesite. % ♦ Q 11.7 or 18.9 ab 32.5 an 17.5 di 3.2 hy 9.7 mt 4.2 il 0.5 Near Hurricane Ridge, Yellowstone Nat. Park. L. G. Eakins. J. P. Iddings, M.U.S. G.S., XXXII, p. 261, 1899. Andesite- porphyry. so 3 LioO 0.29 0.05 Q 19.1 or 7.2 ab 33.5 an 19.7 di 1.8 hy 6.8 il' '2.6 hm 4.5 tn 3.4 Agate Creek, Yellow¬ stone National Park. • J. E. Whitfield. J. P. Iddings, B. U. S. G. S., 148, p. 134, 1897. Pyroxene- andesite. CroO ;j NiO SrO LioO none none 0.10 none Q 11.6 or 13.9 ab 33.5 an 23.9 di 2.8 hy 8.2 mt 3.0 il 0.8 Wind River Plateau, Yellowstone Na¬ tional Park. H. N. Stokes. Hague and Jaggar, B. U. S. G. S., 168, p. 97, 1900. Hornblende- augite- an desite. NiO SrO LioO none 0.11 trace Q 12.2 or 16.1 ab 30.9 an 20.0 di 3.9 hy 9.3 mt 3.2 il 1.1 Cabin Creek, Yellow¬ stone National Park. H. N. Stokes. Hague and Jaggar, B. U. S. G. S., 168, p. 96, 1900. Diorite- porphyrv. Cl FeSo SrO 0.04 0.90 trace Q 21.4 or 8.3 ab 33.5 an 20.9 hy 10.9 mt 2.6 pr 0. 9 North Mosquito Am¬ phitheater, Lead- ville, Colo. W. F. Hi lie- brand. W. Cross, M. U. S. G. S., XII, p. 340, 1886. Biotite- porphyrite. so 3 SrO LioO trace trace? trace Q 14.8 or 11.1 ab 39.8 an 20.3 di 8.9 hy 0.7 mt 3.5 il 0.5 Henry Mountains, Utah. R. B. Riggs. J. S. Diller, B. U. S. G. S. 148, p. 183, 1897. Porphyry. SrO Li ; 0 0.12 trace Q 14.9 or 13.3 ab 37.7 an 20.0 di 5.5 hy 3.4 mt 2.8 il 0.9 Mount Hillers, Hen¬ ry Mountains, Utah. W. F. Hille- brand. W. Cross, 14 A. R. U. S. G. S., II, p. 227, 1894. Hornblende- porphyrite. SrO Li»0 0.07 trace Q 10.6 or 16.7 ab 35.1 an 18. 6 di 7.7 hy 3.2 mt 4.6 il 1.2 Ute Peak, Sierra El Late, Colorado. W. F. Hille- brand. W. Cross, 14 A. R. U. S. G. S., Il, p. 227, 1894. Hornblende- porphvrite. Near andose. SrO Li»0 0.13 trace Q 10.7 or 16.1 ab 33.5 an 23.1 di 6.3 hy 1.1 mt 4.6 il 1.1 ap 0.7 Lone Cone, San Mi¬ guel Mountains, Colorado. W. F. Hille- brand. W. Cross. 14 A. R. U. S. G. S., II, p. 227, 1894. Augite-diorite. Near andose. 284 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS II. DOSALAXE—Continued. RANG 3. ALKALICALCIC. TONALASE—Continued. No. Si0 2 A1 2 0 3 FeA FeO MgO CaO Na 2 0 K 2 0 H 2 0+ H 2 0- co 2 Ti0 2 PA MnO BaO Sum Sp. gr. ( 27 62.71 17.06 3.79 2. 74 1. 78 5.51 3. 54 2. 96 0. 24 trace 100. 33 2. 79 A3. Ill 1.045 .167 .024 .038 .045 .098 .057 .032 30° 28 56. 93 17.03 3.67 4. 54 3. 30 6.51 3.19 2. 58 0. 45 0.13 none 1.03 0. 44 0.10 0. 08 100. 04 2. 860 Al. I .949 .167 .023 .063 .083 .116 .050 .027 .012 .003 . .001 .001 33° 29 60.16 15. 34 3. 07 2.18 3.41 5. 79 3. 88 2. 59 1.79 0. 25 0. 84 0. 46 0. 08 0.14 100.15 2. 635 Al. I 1.003 .150 .020 .030 .085 .103 .063 .027 .010 .003 .001 .001 21° 30 '62.78 17.16 1.96 2.31 2.32 4. 84 4.11 2.15 0. 88 0. 24 none 0. 56 0.15 0.06 0. 04 99.58 Al. I 1.046 .168 .012 .032 .058 . 086 . 066 .023 .007 .001 .001 — 31 58.63 16. 23 1.91 4. 20 4.28 6. 59 3.51 2.09 1.17 0.15 none 0. 74 0. 20 0.11 0. 06 99. 93 Al. I .977 .159 .012 .058 .107 .118 .057 .022 .009 .001 .002 — 32 64. 04 15. 58 1.26 3. 22 3. 23 4. 51 4.01 2. 22 1.17 0.19 none 0. 69 0.16 trace 0.11 100. 39 Al. I 1.067 .153 .008 .044 .081 .080 .064 .023 .009 .001 — .001 33 63. 78 16.39. 1.12 2. 76 3. 27 4. 07 3. 84 2. 03 1.82 0. 22 none 0.44 0.11 0. 05 0. 08 99.98 Al. I 1.063 .161 .007 .039 .082 .073 .062 .021 .005 .001 .001 .001 34 63. 37 15.90 1.41 3.18 3. 33 4. 63 4. 05 2.10 1.16 0.18 none 0. 69 0.17 trace 0. 06 100. 23 Al. I l. Ood .156 .009 .044 .084 .083 .065 . 022 .009 .001 — — 35 57. 21 12.99 3. 28 10.18 1.59 5. 97 3. 07 1.61 1.03 0. 68 1. 72 0.44 0. 24 0. 06 100. 20 Al. I .951 .127 .021 .141 . .040 .107 .050 .017 .021 .003 .004 — 36 62. 09 17.03 2. 38 2.69 3. 08 5. 65 4.10 1.67 0.13 0.04 none 0. 65 0.19 trace 0. 07 99. 84 Al. I 1.035 .167 .015 .038 .077 .101 .066 .018 .008 .001 — .001 37 60. 98 17. 82 1.83 3. 33 2. 76 5. 73 4. 26 ,43 0. 45 0.13 none 0. 71 0.17 trace 0. 06 99. 71 Al. I 1.016 .174 .011 .046 .069 .102 0.69 . 015 .009 .001 — — 38 60.09 17.85 2.03 3.45 3. 50 6. 28 4.17 1.31 0. 26 0.12 none 0.54 0. 23 trace 0. 05 99. 98 Al. I 1. 002 .175 .013 .049 .088 .112 .068 .014 .007 .002 — — 39 59. 39 18.45 1.79 3.90 3.13 6. 29 4. 29 1.29 0. 42 0.10 none 0. 41 0. 22 trace 0. 05 99. 77 Al. I .990 .181 .011 .054 .078 .112 .069 .014 .005 .002 40 58.41 17.85 2.67 3. 29 3. 61 6.81 3. 77 1.23 0. 86 0.34 none 0.69 0.24 trace 0. 05 99. 87 Al. I .974 .175 .017 .046 .090 .121 .061 .013 .009 .002 — — 41 63. 03 17.72 2. 27 1.92 3. 63 5.97 3. 92 1.06 0.44 99.96 A3. Ill 1.051 .173 .014 .027 .091 .107 .063 .012 42 62.00 17. 84 n. d. 4. 40 2.64 5.37 4. 29 1.47 1. 66 0.17 0. 29 trace 100.13 A2. II 1.033 .175 .061 .066 ! .096 ! .069 .016 1 1 .002 .002 1 _ DOSALANE-TONALOSE. 235 ORDER 4. QUARDOFELIC. AUSTRARE—Continued. SUBRANG 4. DOSODIC. TONALOSE—Continued. i Inclusive. Norm. Locality. A :: ... Analyst. Reference. Author’s name. Remarks. Q 16.4 or 17.8 ab 29.9 an 22.2 di 4.2 by 4.4 mt 5.6 Brush Creek, Elk Mountains, Colo¬ rado. L. G. Eakins. W. Cross, B. U. S. G. S., 150, p. 242, 1898. Diorite. so 3 Cl SrO Li.,0 none trace 0.06 none Q 10. 7 or 15.0 a b26.2 an 25.0 di 3.9 hylO.O ' mt 5.3 il 1.8 ap 0.9 Ophir Needles, Tel- luride, Colorado. H. N. Stokes. W. Cross, B. U. S. G. S., 168, p. 163, 1900. Gabbroitic fa¬ cies of mon- zonite. so 3 g NiO SrO Li„0 0.08 trace trace 0.08 trace Q 13.5 or 15.0 ab 33.0 an 16.7 di 7.2 hy 5.2 mt 4.6 il 1.5 ap 1.1 Sierra Grande, Col¬ fax County, New Mexico. W. F. Hille- brand. W. Cross, B. U. S. G. S., 168, p. 171, 1900. Pyroxene-an¬ desite. • Cl S SrO Li 2 0 trace 0.02 trace trace Q 16.6 or 12.8 ab 34.6 an 22.0 di 1.7 hy 6.6 mt 3.0 il 1.1 Yentna River, Alaska. II. N. Stokes. J. E. Spurr, A. J. S., X, p. 310, 1900. Y entnite. Near yellow- stonose. FeSo SrO Li 2 0 0.04 trace trace Q 10.3 or 12.2 ab 29.9 an 22.2 di 6.4 hyl2.6 mt 2.8 il 1.4 Captain’s Bay, Una- laska Island, Alaska. W. F. Hille- brand. G. F. Becker, B. U. S. G. S., 148, p. 232, 1897. Diorite. S Cro0 3 NiO SrO Li.,0 trace none none trace trace Q 17.4 or 12.8 ab 33.5 an 18.3 di 3.0 hyl0.2 mt 1.9 il 1.4 Mount Stuart, Kitti¬ tas County, Wash¬ ington. H. N. Stokes. G. O. Smith, B. U. S. G. S., 168, p. 224, 1900. Granodiorite. Cr„0 3 NiO SrO LioO none none trace trace Q 18.0 or 11.7 ab 32.5 an 20.3 C 0.5 hyll.7 mt 1.6 il 0.8 Near Mount Stuart, Kittitas County, Washington. H. N. Stokes. G. O. Smith, B. U. S. G. S., 168, p. 224, 1900. Granodiorite- porphyry. S Cr»0 3 NiO SrO Li 2 0 trace none none none trace Q 16.3 or 12.2 ab 34.1 an 18.9 di 3.5 by 10.4 mt 2.1 il 1.4 Near Cascade Creek, Kittitas County, Washington. II. N. Stokes. G. O. Smith, B. U. S.G.S., 168, p. 224, 1900. Granodiorite. FeS, Cr 2 0 3 v 2 o 3 SrO Li 2 0 0.13 none none trace trace Q 15.4 or 9.5 ab 26.2 an 16.7 di 8.9 hyl2.5 mt 4.9 il 3.2 ap 1.0 Turnpike Creek, Kit¬ titas County, Wash¬ ington. W. F. Hille- brand. G. O. Smith, B. U. S.G.S., 168, p. 225, 1900. Diabase. so 3 Cl Cr 2 0 3 NiO SrO none trace? none none 0.07 Q 15.3 or 10.0 ab 34.6 an 23.1 di 4.2 hy 7.6 mt 3.5 il 1.2 Palisades, Crater Lake, Oregon. H. N. Stokes. H. B. Patton, B. U. S.G.S., 168, p. 223, 1900. Hypersthene- augite-andes- ite. so 3 Cl Cr»0 3 NiO SrO none trace none none 0.05 Q 13.5 or 8.3 ab 36.2 an 25.0 di 2.8 hy 9.0 mt 2.6 il 1.4 “The Watchman,” Crater Lake, Ore¬ gon. II. N. Stokes. II. B. Patton, B. U. S. G.S., 168, p. 223, 1900. Hypersthene- augite-andes- ite. so 3 Cl S Cr 2 0 3 NiO SrO none trace none none 0.05 0.05 Q, 11.3 or 7.8 ab 35.6 an 25.9 di 4.5 hyl0.5 mt 3.0 il 1.1 Crater Rim, Crater Lake, Oregon. II. N. Stokes. H. B. Patton, B. U. S.G.S., 168, p. 222, 1900. Hypersthene- augite-andes- ite. so 3 Cl s Cr»0 3 NiO SrO none trace none none none 0.04 Q 10.0 or 7.8 ab 36.2 an 27.2 di 3.2 by 11. 3 mt 2.6 il 0.8 Wizard Island, Crater Lake, Oregon. H. N. Stokes. H. B. Patton, B. U. S.G.S., 168, p. 222, 1900. Hypersthene- augite-andes- ite. so 3 Cl S Cr 2 0 3 NiO SrO none trace none none none 0.05 Q 11.9 or 7.2 ab 32.0 an 28.1 di 4.5 hy 9.5 mt 3.9 il 1.4 Liao Rock, Crater Lake, Oregon. H. N. Stokes. H. B. Patton, B. U. S. G.S., 168, ' p. 223, 1900. Hypersthene- augite-andes- ite. Q 17.8 or 6.7 ab 33.0 an 27.2 di 2.3 hy 9.1 mt 3.2 West Base of Mount Shasta, California. W. II. Melville. J. S. Diller, B. U. S.G. S., 150. p. 228, 1898. Hypersthene- andesite. Q 12.6 or 8.9 ab 36.2 an 25.0 di 1.5 liyl3.9 Mount Shasta, Cali¬ fornia. P. W. Shinier. Hague and Iddings, A. J. S., XXVI, p. 230, 1883. Hypersthene- andesite. Pumice. 236 CHEMICAL ANALYSES OF IGNEOUS ROCKS. CLASS II. DOSALANE—Continued. RANG 3. ALKALI CALCIC. TONALASE—Continued. No. Si0 2 A1A Fe 2 0 3 FeO MgO CaO Na,0 k 2 o h 2 o+ H 2 0- C0 2 Ti0 2 PA MnO BaO Sum 43 61.58 16. 96 1.75 2. 85 3. 67 6. 28 3. 94 1.28 1.06 0. 24 0. 49 0. 22 trace 0. 03 100. 35 Al. I 1.026 .166 .011 .040 .092 .112 .063 .014 .006 .002 — — 44 62. 44 16. 39 4. 66 1.00 2. 65 6.22 3.16 2. 25 1.02 0.31 0. 05 trace 0. 03 100. 18 Al. I 1.041 .160 .029 .014 .066 .110 .051 .024 .004 — — — 45 60. 04 17.43 5. 39 0.53 3.51 6. 65 4.15 1.24 0. 90 0.49 0. 04 0. 08 0. 04 100. 49 Al. I 1.001 .171 .034 .007 .088 .119 .067 .014 .006 — .001 — 46 61.17 17. 74 1.78 3.51 2. 76 5. 90 3. 79 1. 71 0. 83 0.45 0.14 0.12 0. 06 100.00 Al. I 1.020 .174 .011 .049 . 069 .105 .061 .018 .006 .001 .002 — 47 60. 93 18. 56 2. 68 2.19 2. 37 6. 63 3. 79 1.33 0. 90 0.61 0.18 0.10 0. 02 100. 41 Al. I 1.016 .182 .017 .030 .059 .118 .061 .014 .008 .001 .001 — 48 59. 84 16. 81 1.88 3.60 3. 85 6.30 3. 63 2.13 1.04 ■0. 57 0.19 0.14 0. 07 100. 07 Al. I .998 . 164 .012 .050 .096 .112 .058 . 022 .007 .001 .002 .001 49 63.47 16. 75 2.15 2. 75 3. 04 5. 72 3. 94 1.62 0. 55 — 0.37 0.13 0. 09 0. 04 100.66 Al. I 1.058 .164 .014 .039 .076 .102 .063 .017 .005 .001 .001 — 50 58. 08 18. 37 2. 92 3.38 3. 35 7. 05 3. 66 1.33 1.09 ——- 0.44 0.16 0.13 0. 03 100.01 Al. I .968 .180 .018 .048 .084 .126 .059 .014 .006 .001 .002 — 51 60. 20 17.21 3.12 2. 69 3.18 6. 04 3.35 1.44 1.18 1.12 0.57 0.17 0.12 0.11 100. 50 Al. I 1.003 .169 .020 .038 .080 .108 .054 .015 .007 .001 .002 .001 52 59. 68 17.09 2. 85 2. 75 3. 54 6. 62 3. 87 1.31 1.00 0.15 0. 20 0.65 0. 25 trace 0. 04 100.03 Al. I .995 .167 .018 .039 .089 .118 .063 .014 .008 .002 — — 53 58.47 18. 80 3. 34 2. 64 2. 69 6. 60 3. 58 2.01 0. 92 0. 14 0. 51 0. 22 0.13 0. 09 100.19 Al. I .975 .184 .020 .037 .067 .118 .058 .021 .006 .002 .002 .001 54 63. 43 14. 20 1.54 4. 56 2. 35 5.51 3.49 2.19 1.50 0. 15 0. 73 0. 11 0. 03 0. 06 99. 85 Al. I 1.057 .139 .010 .063 .059 .099 .056 .023 .009 .001 — — 55 60. 02 16. 07 2.17 3.46 4. 57 7. 01 3.55 1.59 0. 45 0. 24 0. 42 0.17 0. 10 0. 08 99.96 Al. I 1.000 .157 .014 .049 .114 .125 .057 .018 .005 .001 .001 .001 56 59.34 17.61 3.63 2. 28 3.50 6.45 3.40 1.94 0. 74 0. 64 0.32 0. 25 0.12 0.11 100. 37 Al. I .989 .172 .022 .032 .088 .115 .055 .020 .004 .002 .002 .001 57 63. 39 16.58 1.41 3.08 2.15 4. 76 3. 47 2. 79 1.87 0. 22 0. 44 0.14 trace 0.11 100. 41 Al. I 1.057 .162 .009 .043 .054 .085 .056 .030 .005 .001 — .001 58 62.09 16. 69 1.45 3. 76 1.93 6. 08 3. 36 1. 84 1.47 0.19 0. 32 0. 39 trace 0.10 99. 77 Al. I 1.035 .163 t .009 .052 .048 .109 .054 .020 .004 .003 — .001 59 65. 54 16. 52 1.40 2.49 2. 52 4. 88 4.09 1.95 0. 59 0.12 0.39 0.18 0. 06 trace 100. 73 Al. I 1.092 .162 .009 .035 .063 .087 .066 .021 .005 .001 .001 — 60 59. 48 17. 25 2.15 4.06 2. 67 6. 50 3. 53 2. 27 0. 71 0. 09 0. 93 0.33 0.11 0. 09 100.17 Al. I .991 .169 .014 .057 .007 .116 .057 .024 .011 .002 .002 .001 61 57.41 17.71 2.16 5.01 3.38 6. 73 3.12 1.82 1.14 0. 20 none 1.04 0. 24 0.15 0. 09 100. 26 Al. I .964 .173 .014 .070 .085 .120 .050 .020 .012 .002 .002 .001 DOSALANE-TONALOSE. 287 ORDER 4. QUARDOFELIC. AUSTRARE—Continued. ’ SUBRANG 4. DOSODIC. TONALOSE—Continued. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. SrO Li,0 trace trace Q 14.9 or 7.8 ab 33.0 an 24.7 di hy mt il 5.8 9.2 2.6 0.9 Mount Shasta, Cali¬ fornia. Id. N. Stokes. J. S. Diller, B. U. S. G. S., 148, p. 190, 1897. Hornblende- andesite. SrO LioO trace trace Q 19.8 or 13.3 ab 26.7 an 23.6 di by mt il hm 5.4 4.1 3.2 0.6 1.8 Burney Butte, Shasta County, California. R. B. Riggs. J. S. Diller, B. U. S. G. S., 148, p. 195, 1897. Pyroxene- andesite. Dried at 105°. SO., SrO Li.O trace ? trace Q 13.1 or 7.8 ab 35.1 an 25.0 di hy il hm 6.3 5.9 1.0 5.4 Burney Creek, Shasta County, California. R. B. Riggs. J. S. Diller, B. U. S. G. S., 148, p. 195, 1897. Hornblende- andesite. Dried at 105°. Cr.>0 :J SrO LioO ' none 0.04 trace Q 14.7 or 10.0 ab 32.0 an 26.4 di by mt il 2.4 10.1 2.6 0.9 Crater Peak, n. Lassen Peak, California. W. F. Hille- brand. J. S. Diller, B. U. S. G. S., 148, p. 197, 1897. Hypersthene- andesite. • Dried at 110°. SrO LioO 0.12 none Q 16.6 or 7.8 ab 32.0 an 29.7 di hy mt il 2.6 5.4 3.9 1.2 Tuscan Buttes, n. Lassen Peak, California. W. F. Ilille- brand. J. S. Diller, B. U. S. G. S., 148, p. 195, 1897. Hornblende- andesite. Dried at 105°. Cr 2 0 3 SrO Li 2 0 trace? 0.02 trace Q 11.1 or 12.2 ab 30.4 an 33.4 di hy mt il 6.4 10.5 2.8 1.1 Bailey Creek, Lassen Peak, California. W. F. Hille- brand. J. S. Diller, B. U. S. G. S., 148, p. 197, 1897. Hypersthene- andesite. Dried at 110°. SrO Li 2 0 0.04 trace Q 17.8 or 9.5 ab 33.0 an 23.4 di hy mt il 4.2 8.2 3.2 0.8 Near Suppan’s Moun¬ tain, Tehama County, California. W. F. Hille- brand. J. S. Diller, B. U. S. G. S., 148, p. 196, 1897. Hvpersthene- andesite. Dried at 110°. SrO Li 2 0 0.02 trace Q 11.3 or 7.8 ab 30.9 an 29.7 di hy mt il 4.5 9.6 4.2 0.9 Suppans Mountain, Tehama County, California. W. F. Hille- brand. J. S. Diller, B. U. S. G. S., 148, p. 196, 1897. Ilypersthene- andesite. Dried at 110°. SrO LioO trace trace Q 17.4 or 8.3 ab 28.3 an 27. 8 di hy mt il 1.8 8.7 4.6 1.1 Near Pilot Peak, Plumas County, California. W. F. Hille- brand. H. W. Turner, 14 A. R. U. S. G. S., II, p. 490, 1894. Hornblende- andesite. so 3 Cl SrO Li 2 0 trace 0.03 trace trace Q 13.4 or 7.8 ab 33.0 an 25.0 di hy mt il 6.3 7.6 4.2 1.2 Spanish Peak, Plumas County, ‘ California. H. N. Stokes. H. W. Turner, 17 A. R. U. S. G. S., I, p. 724, 1896. Quartz-diorite. SrO LioO 0.05 trace Q 12.0 or 11.7 ab 30.4 an 29.2 di hy mt il 3.3 6.5 1 . 6 0.9 Mount Ingalls, Plumas County, California. W. F. Hille- brand. H. W. Turner, J. G., Ill, p. 407, 1895. Hornblende- pyroxene- andesite. Also in 17 A. R. U. S. G. S., I, p. 731, 1896. SrO Li 2 0 trace none Q 19.3 or 12.8 ab 29.3 an 16.7 di hy mt il 9.2 7.1 2.3 1.4 Near Bangor, Butte County, California. W. F. Hille- brand. H. W. Turner, 14 A. R. U. S. G. S., II, p. 482, 1894. Granodiorite. - S0 3 Cr.,0 3 SrO Li«0 0.06 trace trace none Q 11.9 or 10.0 ab 29.9 an 22.8 di hy mt il 9.8 10.7 3.2 0.8 Downieville, Sierra County, California. H. N. Stokes. H. W. Turner, J. G., Ill, p. 407,1895. Andesite (quartz¬ bearing). SrO LioO 0.04 trace Q 14.0 or 11.1 ab 28.8 an 27.0 di hy mt il 4.2 7.6 5.1 0.6 Poker Flat, Sierra County, California. W. F. Hille- brand. II. W. Turner, J. G., Ill, p. 407,1895. Hornblende- pyroxene- andesite. Also in 17 A. R. U. S. G. S.,I, p. 731, 1896. Q 17.5 or 16.7 ab 29.3 an 21.1 di hy mt il 2.1 8.7 2.1 0.8 Grass Valley, Nevada County, California. H. N. Stokes. W. Lindgren, 17 A. R. U. S. G. S., II, p. 75, 1896. Quartz- porphyrite. so 3 0.10 Q 19.0 or 11.1 ab 28.3 an 24.7 di hy mt il up 2.4 8.8 2.1 0.6 1.0 Nevada City, Nevada County, California. H. N. Stokes. W. Lindgren, 17 A. R. U. S. G. S., II, p. 59, 1896. Hornblende- porphyrite. SrO Li 2 0 trace trace Q 19.4 or 11.7 ab 34.6 an 20.9 di hy mt il. 2.7 7.7 2.1 0.8 Ophir, Placer County, California. W. F. Hille- brand. W. Lindgren, 14 A. R. U. S. G. S., 11, p. 255, 1894. Granodiorite. SrO Li 2 0 trace trace Q 11.9 or 13.3 ab 29.9 an 24.5 di by mt il 6.3 7.9 3.2 1.7 Donner Pass, Placer County, California. W. F. Hille- brand. W. Lindgren, B. U. S. G. S., 148, p. 212, 1897. Granodiorite. • FeSo NiO" SrO Li a O none 0.02 0.04 trace Q 11.5 or 11.1 ab 26.2 an 28.6 di hy mt il 3.9 12.4 3.2 1.8 Tuolumne River, Amador County, California. W. F Hille- brand. H. W. Turner, 17 A. R. U. S. G. S., I, p. 702, 1896. Quart z-diorite- gneiss. 238 CHEMICAL ANALYSES OF IGNEOUS ROCKS. CLASS II. DOSALANE—Continued. RANG 3. ALKALICALCIC. TONALASE—Continued. No. Si0 2 A1A Fe 2 0 3 FeO MgO CaO Na 2 0 k 2 o H 2 Of 11,0- C0 2 Ti0 2 PA MnO BaO Sum Sp. gr. 62 58.05 15.46 1.69 5. 09 4. 84 6. 94 2. 86 2.14 2. 02 0.10 none 0. 72 0.16 0.14 0.07 100.28 Al. I .968 .152 .011 .071 .121 .124 .047 .022 .009 .001 .002 .001 63 62.62 17.51 0. 49 4.06 2.84 5.49 3. 49 1.76 0. 92 0. 22 0. 55 0.12 0. 05 trace 100.12 Al. I 1.044 .172 .003 .057 .071 .098 .056 .019 .007 .001 .001 — 64 58.09 17.46 1.12 5. 08 4. 06 6.24 2. 94 2. 02 1.45 0. 29 0.21 0.95 0.17 none 0. 07 100. 37 Al. I .968 .171 .007 .071 .102 .ill .047 .022 .012 .001 — .001 65 61.05 18. 30 3. 49 1. 11 2. 59 7. 75 4. 06 1.36 0. 71 0. 09 trace trace 100. 51 2. 668 A2. II 1.018 .179 .022 .015 .065 .138 .065 .015 .001 — — 66 63.13 16. 00 4.34 1.52 2. 07 4. 45 3. 87 2. 65 2.00 99. 54 A3. Ill 1.051 .157 .027 .021 .052 .079 .063 .029 67 60.91 18. 08 2. 40 3. 85 3. 54 5. 56 4.16 1.01 0.71 0. 33 trace 100.55 2. 641 A2. II 1.015 .177 .015 .054 .089 .099 .067 .011 .004 — 68 61.12 17. 73 2. 52 3.10 2. 39 5. 45 3. 01 2. 09 2. 54 99. 95 2. 582 A3. Ill 1.019 .173 .015 .043 . 060 .097 .048 .022 69 62. 74 13. 67 3.39 4. 35 1.74 6. 01 4. 25 1.23 2. 02 none trace 0.18 0. 42 100.00 A2. II 1.046 .134 .021 .061 .044 .107 .069 .013 — .001 .006 70 59. 89 15. 85 5. 21 3. 82 4.15 5. 98 2. 77 1.34 0. 74 0. 02 0/48 trace 0.12 0. 03 100.53 Al. I .998 . 155 .032 .053 .104 .107 .045 .014 .006 — .002 — 71 65. 39 15. 49 2. 80 1.99 2. 06 4. 48 4.56 1.59 0.55 0.11 99.02 2. 61 B3. IV 1.090 .152 .017 .028 .052 .080 .074 .017 .001 72 63. 56 15. 43 3. 02 2. 43 2.55 4. 33 4.02 2.41 1.09 0.95 0.17 100. 01 A2. II 1.059 .151 .019 .033 .064 .077 .064- .025 .012 .001 73 63. 36 16.35 2.12 3.05 3. 28 4.79 3. 58 2. 92 0.99 0.13 100. 57 A3. Ill 1.056 .160 .013 .043 .082 .086 .058 .031 .001 74 61.09 15.96 4. 29 2. 03 1.06 6. 66 2.89 2.51 1.44 0.95 0. 22 99.10 2. 655 B2. Ill 1.018 .156 .027 .028 .027 .119 .047 .027 .012 .002 75 61.04 15. 72 5.03 2.15 3. 61 5. 34 4. 02 2. 66 0. 58 0. 45 100. 60 A3. Ill 1.017 .154 .031 .030 .090 .095 .064 .029 .006 76 60. 05 15. 59 6.95 0. 65 3.61 6. 43 3. 83 1. 76 0. 47 0. 85 0. 25 100.44 2. 728 A2. II 1.001 .152 .044 .010 .090 .114 .061 .019 .010 .002 77 60. 32 16.92 5. 88 1.40 3. 52 5.64 3. 83 2. 42 0.44 100.37 A3. Ill 1.005 .166 .036 .019 .087 .101 .061 .025 78 57.91 16. 45 6.55 2. 32 4. 59 3.73 3.59 1.61 1. 70 0. 37 0.41 0. 06 99. 36 2. 932 A2. II .965 .161 .041 .032 .115 .066 .058 .017 .004 .003 .001 DOSALANE-TONALOSE. 239 ORDER 4. QUARDOFELIC. AUSTRARE—Continued. SUBRANG 4. DOSODIC. TONALOSE—Continued. Inclusive. | Norm. 1 Locality. Analyst. Reference. Author’s name. Remarks. FeSo Ni(>" SrO I.LO none none trace trace Q 11.0 or 12.2 ab 24. 6 an 23.1 di 9.2 1 hy 13.3 mt 2.6 1 il 1.4 Sonora, Tuolumne County, California. W. F. Hille- brand. II. W. Turner, 17 A. R. U. S. G. S., I, p. 731, 1896. Diorite. SrO Li s O trace trace Q 10.9 or 10.6 ab 29.3 an 27.0 hy 13.3 nit 0.7 il 1.1 i Chowchilla River, Mariposa County, . California. W. F. Hille- brand. II. W. Turner. J. G., Ill, p. 403,1895. i Quartz-mica- diorite. Also in 17 A. R. U. S. G. S., 1, p. 691, 1896. S0 3 Cl F SrO Li..O Org 0.05 0.02 trace 0.04 none 0.11 Q 11.2 or 12.2 ab 24.6 an 28.4 Q 14.2 or 8.3 ab 34.1 an 27.5 di 2.1 hy 16.0 mt 1.6 il 1.8 di 8.5 hy 2.6 mt 3.5 hm 1.1 Yaqui Creek, Mariposa County, California. Santa Catalina Island, California. G. Steiger. W. S. T. Smith. H. W. Turner, B. U. S. G. S., 150, p. 342, 1898. W. S. T. Smith, Pr. Cal. Ac. Sc. (3), Geol., I, No. 1, p. 41, 1897. Quartz-mica- diorite. Pyroxene- andesite. Q 18.2 or 16.1 ab 33.0 an 18.1 di 3.1 hy 3.8 mt 4.9 hm 1.0 Cross Spur Quarry, Washoe, Nevada. R. W. Wood¬ ward. G. F. Becker, M. U. S. G. S., Ill, p. 152, 1882. Ilornblende- mica- andesite. Also in B. U. S. G. S., 17, p. 33, 1885. Q 13.6 or 5.1 ab 35.1 an 27.5 hy 13.4 mt 3.5 il 0.6 Mount Iztaccihuatl, Mexico. A. Rohrig. II. Lenk, Btr. G. Mex., II, p. 233, 1899. Hornblende- andesite. Near placerose. Q, 19.0 or 12.2 ab 25.2 an 27.0 C 0.6 hy 9.7 mt 3.5 Old Providence Is¬ land, Caribbean Sea. J. J. II. Teall. T. G. Bonney, Min. Mag., VI, p. 42, 1886. Ilypersthene- andesite. S trace Q 18.5 or 7.2 ab 36.2 an 15.0 di 12.4 hy 3.6 mt 4.9 Island of Grenada, West Indies. J. B. Harrison. J. B. Harrison, Rocks of Grenada, London, 1896, p. 10. Hornblende- andesite. Average sample. ZrO., Cl S CoO CuO Pb none 0.06 none none 0.07 none Q 19.3 or 7.8 ab 23.6 an 26.7 di 2.4 hy 11.2 nit 7.4 il 0.9 Mazaruni District, British Guiana. J. B. Harrison. J. B. Harrison, Priv. contrib. Hornblende- porphyrite. Dried at 100°. Q, 20.4 or 9.5 ab 38.8 an 17.0 di 5.3 hy 4.4 m’t 4.0 Cumbal Volcano, Colombia. R. Kiich. R. Kiich, G. Stud. Colomb., I, p. 167, 1892. Pyroxene- dacite. Sum low. S0 3 0.05 Q, 19.2 or 13.9 ab 33.5 an 17.2 di 3.3 hy 5.1 mt 4.4 il 1.8 Llanos de las Mesas, Mount Tajumbina, Colombia. Fernandez. R. Kiich, G. Stud. Colomb., I, p< 125, 1892. Pyroxene- hornblende- dacite. Q 15.2 or 17.2 ab 30.4 an 19.7 di 3.5 hy TO. 5 mt 3.1 Quebrada Chuchala Chiquita, Cerro'Ne¬ gro Mayasquer, Colombia. Fischer. R. Kiich, G. Stud. Colomb., I, p. 186, 1892. Pyroxene- hornblende- dacite. * Q 20.8 or 15.0 ab 24.6 an 22.8 di 5.8 no 1.2 mt 3.7 il 1.8 hm 1.8 S’ma Virgen de Ya- nancal, Loma de Ales, Colombia. Bragard. R. Kiich, G. Stud. Colomb., I, p. 145, 1892. Hornblende- andesite. Sum low. Q 12.8 or 16.1 ab 33.5 an 17.0 di 7.4 hy 5.6 nit 5.6 il 0.9 hm 1.1 Penon de Pitayo, Colombia. Schroder. R. Kiich, G. Stud. Colomb., I, p. 105, 1892. Hornblende- andesite. Q, 14.7 or 10.6 ab 32.0 an 20.0 di 9.1 hy 4.8 il 1.5 hm 7.0 Quebrada del Molino, Azufral de Tuquer- res, Colombia. Bragard. R. Kiich, G. Stud. Colomb., I, p. 151, 1892. Pyroxene- andesite. Q 13.3 or 13.9 ab 32.0 an 22.2 di 4.5 hy 6.6 mt 4.4 hm 2. 7 Chimborazo, Ecuador. A. Schwager. Schwager and Giimbel, Geogn. J’heft, Cassel, VII, p. 74, 1895. Hornblende- andesite. s 0.07 Q 16.1 or 9.5 i ab 30.4 an 18. 3 1 C 2.0 hy 11.5 mt 6.5 il 0.6 hm 2.0 j Don Pablo, Coquim- bo, Chile. F. v. Wolff. F. v. Wolff, Z. D. G. G , LI, p. 502, 1899. Augite- porphyrite. 240 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS II. DOSALANE—Continued. RANG 3. ALKALICALCIC. TONALASE—Continued. No. Si0 2 A1A FeA FeO MgO CaO Na 2 0 k 2 o h 2 o+ H 2 0- C0 2 i Ticy PA MnO BaO Sum Sp. gr. 79 60.32 17.10 4. 74 1.12 2. 89 3.51 5. 06 2.11 1.99 0. 81 0. 05 trace 99. 70 2. 609 A3. Ill 1.005 .166 .029 .015 .072 .062 .081 .022 — — 80 58. 46 15.13 5.34 2. 40 3. 84 4. 98 3. 25 2. 74 2. 23 0.69 0. 25 99.31 B2. Ill .974 .148 .033 .033 .096 .089 .052 .029 .008 .002 (99.71) 81 58. 67 14. 37 1.64 6. 94 4.65 7.39 3.01 1.42 2. 02 trace 100.11 A3. Ill .978 .141 .010 .096 .116 .132 .048 .015 — 82 58. 07. 17. 62 4.97 3.09 1.46 5. 23 3. 31 2.15 4.15 trace 100. 05 A3. Ill .968 .173 .031 .043 .037 .093 .053 .023 83 57. 57 14. 25 6. 04 3. 95 4. 24 6. 87 2.98 1.08 1.25 0. 30 trace 0.15 0. 27 99.14 B2. Ill .960 .140 .037 . 055 .106 .123 .048 .012 .001 .004 84 58. 21 15. 54 6. 52 1.78 2. 60 4. 40 2.96 2.58 0.56 2. 70 2.09 0.32 0. 26 100. 52 A2. II .970 .152 .041 .025 .065 .078 .048 .027 .025 .002 .004 85 57. 29 15. 71 4.54 3.18 4. 30 5.40 4. 04 1.93 2. 69 0. 68 0. 29 100. 05 A2. II .955 .154 .028 .044 .108 .096 .065 .020 .008 .004 86 65.16 15.56 2.11 3.39 2. 40 6. 70 2. 54 1.47 1.11 0.36 100. 80 A3. Ill 1.086 .152 .013 .048 .060 .120 .041 .016 .005 87 63.18 17.03 0. 24 6. 37 0. 92 4.17 4. 44 2.91 0. 52 0.-23 100. 20 A3. HI 1.053 .167 .002 .089 .023 .075 .071 .031 .002 88 58. 06 15.44 2.19 4. 24 4. 68 6.52 3.13 1.51 2. 79 0. 32 1. 11 0.21 100.37 2. 659 A2. II .968 .151 .014 .059 .117 .116 .050 .016 .013 .002 89 57. 73 16. 05 2. 54 5.14 1.93 4. 76 4. 04 2. 58 2. 02 0. 20 1.85 0. 52 100.13 2. 723 A2 II .962 .157 .015 .071 .048 .085 .064 .027 .023 .004 90 64. 48 14. 58 4. 60 0. 93 1.13 4. 00 3. 60 0.99 2. 02 0. 94 3. 07 0. 58 0. 20 101.17 2. 593 B2. Ill 1.075 .143 .029 .013 .028 .071 .058 .011 ' .038 .004 .003 91 63.10 14. 26 5.73 1.06 1.05 3. 70 3. 85 1.09 1.31 , 0. 46 3.46 0.57 0. 21 99. 90 2.446 A2. II 1.052 .140 .035 .015 .026 .066 .062 .012 .043 .004 .003 92 62. 78 14.69 5.30 1.06 1.07 3.84 3. 78 1.13 1. 78 0. 54 3.10 0.58 0.25 99. 95 2. 445 A2. II 1.046 .144 .033 .015 .028 .069 .061 .012 .038 .004 .004 93 61.69 15. 23 4. 97 0. 89 1.03 5.41 3. 75 1.04 1.10 0. 52- 3. 69 0. 51 0. 27 100.15 2. 522 A2. II 1.028 .149 .031 .012 .026 .096 .060 .011 . 046 .003 .004 (100.05) 94 57. 38 16. 92 5. 70 5. 84 2. 00 3. 66 4.03 2. 08 0. 84 0. 83 trace trace 99.28 2. 544 B2. Ill . 956 .166 .035 .080 .050 .066 .064 .022 .010 _ — • 95 59.86 17.12 7.54 0. 52 4.02 5.08 3. 08 1. 72 0. 25 0.15 0. 22 0. 22 trace 99. 79 2. 75 A2. II .998 .168 .047 .007 .101 .091 .050 .018 1 .003 .002 — 16° DOSALANE-TONALOSE. 241 ORDER 4. QUARDOFELIC. AUSTRARE—Continued. SUBRANG 4. DOSODIC. TONALOSE—Continued. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. Q 11.5 or 12.2 ab 42.4 an 17.2 by mt hm 7.2 3.5 2.2 ’ Aconcagua, Argen¬ tina. R. W. Gray. T. G. Bonney, G. M., XXXVI, p. 4, 1899. Hornblende- andesite. Near dacose. Q 14.2 or 16.1 ab 27.2 an 18.6 di by mt il hm 4.8 7.4 5.8 1.2 1.3 Average of British igneous rocks. Various ana¬ lysts. A. Harker, G. M., XXXVI, p. 220, 1899. Cf. Nos. 1, 2, 3. Sum incorrect. Q 11.3 or 8.3 ab 25.2 an 21. 7 di by mt 12.4 16.8 2.3 Eskdale Muir, Dum¬ fries, Scotland. Wilson. J. J. H. Teall, Q. J. G. S., XL, p. 227, 1884 (quoted). Andesitic ba¬ salt. Also in Brit. Petr., p. 196, 1888. Q 16.6 or 11.8 ab 27.8 an 25.9 C 0.4 by mt 5.3 7.2 Beinn More, Island of Mull, Scotland. G. H. Perry. J. W. Judd, Q. J. G. S., XLVI, p. 349, 1890. Propylite. Not fresh. s 0.19 Q 16.4 or 6.7 ab 25.2 an 22.2 di hy mt 9.5 8.5 8.6 Great Ayton, Eng¬ land. W. F. K. Stock. J. J. H. Teall, Q. J. G. S., XL, p. 224, 1884. Andesite. Sum low. Q 20.9 or 15.0 ab 25.2 an 21.7 by il hm 6.5 3.9 6.5 Grtiflasian, Rddd, Sweden. Id. Santesson. P. J. Holmquist, Afv. Sv. G. und., No. 181, p. 73, 1899. Porphyrite. Not fresh. Q 9.8 or 11.1 ab 34.1 an 19.2 di by mt il 5.9 9.1 6.5 1.2 Svanken, Rodo, Sweden. H. Santesson. P. J. Holmquist, Afh. Sv. G. Und., No. 181, p. 63, 1899. Syenite- porphvrv. Not fresh. Near andose. Q 26.0 or 8.9 ab 21.5 an 26.4 di hy mt 5. 7 7.8 3.0 Loytokorpi, Kan- kaanpaa, Finland. H. Berghell. J. J. Sederholm, B. C. G. Finl., 6, p. 74, 1897. Porphyroid. Metamor¬ phosed. Near bandose. so 3 0.19 Q 11.5 or 17.2 ab 37.2 an 18.1 di 2.5 hy 12.5 mt 0.5 Zwingenberg, Melibo- cus Mountains, Hesse. Heu rich. A. Osann, Mit. Bad. G. L-A., 11, p. 385, 1893. Malchite. S0 3 for S. so 3 Org 0. 16 o.ol Q. 13.3 or 8.9 ab 26.2 an 23.6 di hy mt il 7.0 12.5 3.2 2.0 Kronweiler, Rh. Prussia. Bdttcher. K. A. Lossen, Jb. Pr. G. L-A., X, p. 290, 1892. Bronzite- porphyrite- pitchstone. so 3 0.77 Q 11.8 or 15.0 ab 33.5 an 18.3 di hy mt il ap 1.6 8.4 3.5 3.5 1.2 Staffelhof, Nahe River, Rh. Prussia. K. Gremse. K. A. Lossen, Jb. Pr. G. L-A., X, p. 309, 1892. Augite- porphyrite. F 0.05 Q 29.5 or 6.1 ab 30.4 an 19.7 C 0.3 by il hm ru 2.8 2.0 4.6 2.1 Froschberg, Siebengebirge, Rh. Prussia. von Reis. W. Hocks, Jb. Pr. G. L-A., XII, p. 16*, 1893. Andesite. Sum high. Ti0 2 high? F 0.05 Q 27.0 or 6.7 ab 32.5 an 18. 3 hy il hm ru 2.6 2.3 5.7 2.3 Froschberg, Siebengebirge, Rh. Prussia. von Reis. W. Hocks, Jb. Pr. G. L-A., XII, p. 16*, 1893. Andesite. Ti0 2 high? F 0.05 Q 26.5 or 6.7 ab 32.0 an 19.2 hy il hm ru 2.8 2.3 5.3 1.9 Froschberg, Siel: engebirge, Rh. Prussia. von Reis. W. Hocks, Jb. Pr. G. L-A., XII, p. 16*, 1893. Andesite. Ti0 2 high? F 0.05 Q 24.1 or 6.1 ab 34.1 an 21.7 hy tn il hm ru 2.6 3.6 1.8 5.0 1.3 Froschberg, Siebengebirge, Rh. Prussia. von Reis. W. Hocks, Jb. Pr. G. L-A., XII, p. 16*, 1893. Andesite. TiOjj high? Q 13.4 or 12.2 ab 33.5 an 18.3 C 1.4 hy mt' il 9.6 8.1 1.5 Lauterbach Thai, Siebengebirge, Rh. Prussia. E. Kaiser. E. Kaiser, Vh. Nh. Ver. Bonn, LIV, p. 178, 1897. Andesite. Sum low. Dried at 125°. Q 18.4 or 10.0 ab 26.2 an 25.3 C 0.9 hy mt hm 10.1 1.6 6.4 Galgenberg, Hesse. Not stated. Chelius & Klemm, Erl. G. Kte. Hesse, III, p. 8, 1894. Hornblende- granite. Iron oxides? 14128 — No. 14—03 16 242 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS II. DOSALANE—Continued. RANG 3. ALKALICALCIC. TONALASE—Continued. No. Si0 2 A1A Fe 2 0 3 FeO MgO CaO Na. 2 0 K.,0 h 2 o+ h 2 o- O o tc _ Ti0 2 p 2 o 5 MnO BaO Sum Sp. gr. 96 57.85 17.20 5.04 1.53 2. 81 6. 69 3. 21 2.26 2. 00 0.85 0. 83 0.15 100. 56 2. 676 A2. II .964 .167 .031 .021 .070 .120 .051 .024 .010 .001 97 59. 60 14. 30 1.49 6. 43 1.49 4. 54 2. 90 1.84 4. 63 2. 02 1.12 0.24 100. 81 2. 646 A2. II .993 .140 .009 .089 .037 .080 .047 .020 .013 .002 98 59.32 13. 33 ]. 36 7.32 1.79 4.37 2. 58 2.30 3. 34 2.91 1.04 0.18 100. 00 2. 736 A2. II .989 .130 .009 .101 .045 .078 .042 .024 .012 .001 99 56. 69 14. 99 3.39 4.38 3.39 5. 92 3. 30 2.05 3. 43 1.00 1.34 0.22 100. 25 2. 67 A2. II .945 .147 .021 .061 .085 .105 .053 .022 .017 .002 100 61.40 19. 98 1.28 4.08 3. 67 4. 43 2. 21 1.33 1.44 99. 82 A3. Ill 1.023 .196 .008 .057 .092 .078 .035 .014 101 60. 84 18. 75 1.40 3. 48 1.95 5. 32 2. 88 2.13 3.15 0. 29 100.19 A3. Ill 1.014 .184 .009 .049 .049 .094 .047 .022 .004 102 66. 91 15.20 n. d. 6. 45 2. 35 3. 73 3.33 0. 86 0.16 98. 99 2. 724 C4. V 1.115 .149 — .090 .059 .066 .054 .009 19° 103 62. 27 16. 92 2.40 2. 59 2. 87 4. 78 4. 72 1.47 1.22 0.16 trace 99. 47 2. 584 B2. Ill 1.038 .166 .015 .036 .072 .086 .076 .016 .002 — 22° 104 60. 63 16. 96 2. 87 2. 31 3. 27 6. 41 3.58 2.44 1.98 100.45 2. 594 A3. Ill 1.011 .166 .018 .032 .082 .114 .058 .026 22° 105 60. 39 16. 96 1.50 3. 42 3. 81 5.41 3. 37 2. 01 3. 03 0. 21 trace 99.11 2. 580 B2. Ill 1.007 .166 .009 .048 .095 .096 . 055 .021 .003 22° 106 59. 29 15. 27 5.21 2. 08 4. 42 6.15 3. 31 2. 61 1.46 0.18 100. 02 2.614 A3. Ill .988 .150 .032 .030 .ill .110 .053 .027 .001 22° 107 63. 18 14.64 1.50 5.18 2. 26 7.69 2. 48 1.57 0. 21 1.36 0. 41 100. 48 A3. Ill 1.053 .144 .009 .072 .057 .137 .040 .017 .010 .006 108 59. 27 14. 55 2. 02 7.17 3. 50 7. 76 2. 88 1.62 0. 36 0. 91 0. 32 100.36 A3. Ill .971 .143 .013 .100 .088 .138 .047 .017 .006 .005 109 62. 02 15.15 2. 08 1.96 3.15 5. 52 3.18 1. 66 4. 57 99. 29 B3. IV 1.034 .149 .013 .028 .079 .098 .051' .018 110 59. 94 15. 52 2. 53 2.00 3.62 6. 76 4.46 1.29 3. 35 99. 47 A3. Ill .999 .152 .016 .028 .091 .121 .072 .014 111 63. 61 17. 64 1.81 2.09 3.19 5. 22 4. 70 1.28 0. 57 100.11 A3. Ill 1.060 .173 .011 .030 .080 .093 . 076 .014 112 61. 90 17.28 1.70 5. 76 2. 76 4.68 2. 52 1.80 1.30 99. 70 A3. Ill 1.032 .169 .011 .080 .069 .084 .040 .019 113 61.29 17. 68 6.03 0. 30 2. 45 5. 61 4. 28 1.38 0. 96 0. 65 100. 63 2. 440 A3. Ill 1.022 .173 .038 .004 .061 .100 .069 .015 .008 DOSALANE-TONALOSE. 243 ORDER 4. QUARDOFELIC. AUSTRARE—Continued. SUBRANG 4. DOSODIC. TONALOSE—Continued. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. so 3 0.14 Q 13.9 or 13.3 ab 26.7 an 25.6 di hy mt il hm 6.1 4.2 2.6 1.5 3.2 Himmelberg, Blatt Lebach, Prussia. Hampe. Weiss and Grebe, Erl. G. Kte. Pr., Bl. Lebach, p. 34, 1889. Bronzite- porphyrite. S0 3 for S. so 3 Org a. 19 0.02 Q 20.0 or 11.1 ab 24.6 an 20.3 di hy mt il 1.6 11.8 2.1 2.0 Niederbrombach, Oberstein, Harz Mountains. Bottcher. K. A. Lossen, Jb. Pr. G. L-A., X, p. 293, 1892. Augite- porphyrite. Not fresh. S0 3 for S. so 3 Org 0.14 0.02 Q 20.2 or 13.3 ab 22.0 an 15.0 di hy mt il 5.6 12.2 2.1 1.8 Bielstein, Riibeland, Harz Mountains. Gremse. K. A. Lossen, Jb. Pr. G. L-A., X. p. 290, 1892. Quartz-augite- porphvrite. Not fresh. S0 3 for S. S0 3 0.15 Q 12.6 or 12.2 ab 27.8 an 19.5 di hy mt il 8.1 7.8 4.9 2.5 Werschweiler, St. Wendel, Harz Mountains. Bottcher. K. A. Lossen, Jb. Pr. G. L-A., X, p. 266, 1892. Diorite- porphyry. Not fresh. S0 3 for S. Q 25.9 or 7.8 ab 18.3 an 21.7 C 7.0 hy mt 15. 7 1.9 Barenstein, Riesengebirge, Silesia. W. Herz. L. Milch, N. J. B. B., XII, . p. 211, 1899. Diorite. Near bandose. Ncft fresh. Q 19.4 or 12.2 ab 24.6 an 26.1 C 2.1 hy mt il 10.2 2.1 0.6 Wolfsgrube, Ursulaberg, Carinthia. Not stated. H. v. Foullon, Vh. Wien. G. R-A., XXIII, p. 93, 1889. Quartz-mica- porphyrite. Q 27.4 or 5.0 ab 28. 3 an 18.3 C 2.0 hy 17.8 Lake Avio, Adamello Mountains, Tyrol. v. Rath. v. Rath, Z. D. G. G., XVI, p. 247, 1864. Tonalite. Low sum due to nondeter¬ mination of Fe 2 0 3 ? Cl 0.07 Q 14.0 or 8.9 ab 39.8 an 20.6 di hy mt 2.7 8.7 3.5 Punta della Civitate, Capraia Island, Italy. A. Rohrig. H. Emmons, Q. J. G. S., XLIX, p. 142, 1893. Andesite. Sum low. Q 12.9 or 14.5 ab 30.4 an 22.8 di hy mt 7.3 6.4 4.2- Poppa alia Nave, Capraia Island, Italy. A. Rohrig. H. Emmons, Q. J. G. S., XLIX, p. 141, 1893. Andesite. Cl trace Q 13.9 or 11.7 ab 28.8 an 25.0 di hy mt 1.6 15.5 2.1 Monte Patello, Capraia Island, Italy. A. Rohrig. PI. Emmons, Q. J. G. S., XLIX, p. 141, 1893. Andesite. Sum low. Cl 0.04 Q 13.0 or 15.0 ab 27.8 an 19.5 di hy mt 8.7 7.1 7.3 Capraia Island, Italy. A. Rohrig. H. Emmons, Q. J. G. S., XLIX, p. 142, 1893. Andesite. Q 23.8 or 9.5 ab 21.0 an 24.2 di hy mt ap 4.6 11.7 2.1 3.2 Lava of 1888, • Yulcano, iEolian Is¬ lands. L. Ricciardi. G. Mercalli, Gior. Min., Ill, p. 110, 1892. Andesite. Q 12.9 or 9.5 ab 24.6 an 22.0 di hy mt ap 9.5 15.2 3.0 2.0 Lava of 1888, Yulcano, iEolian Is¬ lands. L. Ricciardi. G. Mercalli, Gior. Min., Ill, p. 110, 1892. Andesite. Q 20.9 or 10.0 ab 26.7 an 22.2 di hy mt 4.0 8.1 3.0 Dubowka, Mariupol, Russia. J. Morozewicz. J. Morozewicz, cf. N. J., 1900, I, p. 394. Hornblende- andesite. Sum low. Q 11.0 or 7.8 ab 37.7 an 18.3 di hy mt 12.1 5.0 3.7 Mokraya Wolnowa- cha, Mariupol, Rus¬ sia. J. Morozewicz. J. Morozewicz, cf. N. J., 1900,1, p. 394. Hornblende- andesite. Q 14.7 or 7.8 ab 39.8 an 23.1 di hy mt 2.3 9.4 2.6 Tschchera River, Cau¬ casus Mountains. L.-Lessing and Krikmeyer. Loewinson-Lessing, cf., N. J., 1899, II, p. 237- Andesite- dacite. Q 22.3 or 10.6 ab 21.0 an 23.4 C 2.7 hy mt 16.1 2.6 Ivasbek, Caucasus Mountains. L.-Lessing and Krikmeyer. Loewinson-Lessing, cf., N. J., 1899, p. 237. Andesite- dacite. Q 16.3 or 8.3 ab 36.2 an 24. 7 di hy il hm 2.3 5.0 0.6 6.0 Anzeiou, Angina, Greece. A. Rohrig. H. S. Washington, J. G., Ill, p. 150, 1895. Hornblende- dacite. Iron oxides ? 244 CHEMICAL ANALYSES OF IGNEOUS HOCKS CLASS II. DOSALANE—Continued. RANG 3. ALKALICALCIC. TONALASE—Continued. No. Si0 2 A1A FeA FeO MgO CaO Na 2 0 K,0 h 2 o+ H 2 0- C0 2 Ti0 2 FA MnO BaO Sum Sp. gr. 114 59. 94 18. 40 3. 69 2. 99 1.95 6. 58 3.43 1.67 0. 94 0. 02 99.61 2.440 A3. Ill .982 .180 .023 .042 .049 .118 .055 .018 — 115 59.83 17.82 3. 62 4. 60 1.64 6.88 3. 31 1.23 0. 52 0.01 99. 44 2. 635 A3. Ill .997 .174 .023 .064 .041 .123 . 053 .014 — 116 55. 46 16. 76 5.15 3. 00 2. 44 10. 00 2. 94 1.95 1.60 0. 21 99. 51 2.610 A3. Ill .918 .164 .032 .042 .061 .179 .047 .022 .003 117 56. 58 14. 88 2.31 3. 04 3. 76 8. 69 3. 36 2.18 1.43 0. 69 2.32 0. 77 0.15 0.16 0. 07 100.39 Al. I .943 .146 .014 .042 .094 .155 .054 .023 .010 .001 .002 .001 118 61.93 16. 45 4. 66 0. 40 2. 94 4. 40 4. 03 2. 20 2. 50 99.51 2.539 A3. Ill 1.032 .161 .029 .006 .074 .079 .065 . 023 15° 119 Or 55 . 2d 12.12 8. 84 4.91 4. 84 8.34 2. 08 1.62 1.65 • 99. 65 A3. Ill .921 . 119 . 055 .068 .121 .149 .034 .017 120 61.50 16. 79 3.48 2.23 1.96 •5.44 4. 78 2. 38 trace 0. 36 trace 1.22 100.14 2. 727 A3. Ill 1.025 .164 . 022 .030 .049 .096 .077 .025 .017 15° RANG 3. ALKALICALCIC. TONALASE. 1 60.61 16. 61 1.97 5.09 3.10 4. 46 3.11 0. 25 2.45 1. 57 99. 22 B3. IV 1.010 .163 .012 .071 .078 .079 . 050 .003 2 60. 40 16.89 1.88 3. 72 3. 82 7. 25 3.80 0. 77 0. 20 0. 09 none 0.61 0.16 0.12 0. 06 99. 87 Al. 1 1.007 .165 .012 .052 .096 .129 .061 .008 .008 .001 .002 — :3 64. 67 16. 62 0.51 0. 76 2. 26 9. 50 • 4.10 0. 34 0. 37 0. 08 0.51 0.12 trace 0. 02 99. 86 Al. 1 1.078 .163 .003 .011 .047 .169 .066 .003 .006 .001 — — 4 60. 09 16. 43 2.28 3. 01 4. 37 5. 76 4. 52 0. 70 1.16 0. 20 0. 07 0.63 0.12 0.12 trace 99. 80 Al. I 1.002 .161 .014 .042 .109 .103 .072 .007 .008 .001 .002 — 5 61. 37 15. 41 3.15 3 89 3. 48 4. 42 3. 76 0. 34 2. 70 0.29 0. 60 0. 08 0.47 0. 08 100.04 Al. I 1.023 .151 .020 .054 .087 .078 .060 .003 i .007 .001 '.007 .001 6 63. 82 16. 53 1.28 2.93 1.99 5.57 4.12 0. 77 1.82 1.10 trace trace 99. 93 2. 689 A3. III 1.064 .162 .008 .040 .050 .100 .066 .008 — — 7 64. 22 16. 36 2. 93 2. 50 1.94 5.85 3. 96 0. 73 0. 84 0.21 trace 99. 54 2. 598 A3. III 1.070 .160 .018 .035 .049 .104 .064 .008 .003 — 8 57. 56 13. 83 2. 46 3. 63 4. 67 7.27 3. 96 0. 48 2. 66 3.50 0.17 trace trace 100.19 A2. II .959 .135 .015 .050 .117 .130 \ 064 .005 .002 —. — 9 56. 63 17. 01 6.15 2. 80 4. 08 6. 83 4. 48 0.25 1.17 0. 02 0.18 0. 28 0. 05 none 100. 02 Al. I .944 .164 .039 .039 102 .121 .072 .003 .002 .002 .001 — 10 59.56 16.10 6. 28 3.02 3.08 6. 32 3. 09 0. 80 0. 44 0.18 1.80 100. 67 A3. III .993 .158 .039 .042 .077 .112 .055 .008 .001 .023 DOSALANE-PLACEROSE. 245 ORDER 4. QUARDOFELIC. AUSTRARE—Continued. SUBRANG 4. DOSODIC. TONALOSE—Continued. Inclusive. Norm. Locality. Analyst. Reference. • Author’s name. Remarks. Q 14.8 or 10.6 ab 28.8 an 29.5 di hy mt 2.7 5.6 5.3 Ivaimeni, Methana, Greece. A. Rohrig. H. S. Washington, J.G., III, p. 150, 1895. Hornblende- hypersthene- andesite. Q 17.0 or 7.8 ab 27.8 an 29.7 di hy mt 3.7 7. 7 5.3 Mount Chelona, Methana, Greece. A. Rohrig. PI. S. Washington, J. G., Ill, p. 150, 1895. Hypersthene- andesite. 1 Q 9.5 or 12.2 ab 24.6 an 26.4 di wo mt 15.6 1.6 7.4 Mount Chondos, 2Egina, Greece. A. Rohrig. PI. S. Washington, J. G., Ill, p. 150, 1895. Hornblende- augite- andesite. Near andose. Q 9.3 or 12.8 ab 28.3 an 19.2 di hy mt 19.1 2.6 4.7 Mytilene Island, Aegean Sea. T. M. Chatard. .T. S. Diller, B. U. S. G. S., 79, p. 29, 1891. Quartz-basalt. Near andose. Q 16.7 or 12.8 ab 34.1 an 20.3 di hy mt hm 1.3 6.8 1.4 3.7 Acropolis, Pergamon, Asia Minor. R. Lepsius. R. Lepsius, Geol. v. Attika, Ber¬ lin, 1893, p. 169. Biotite-dacite. Q 15.8 or 9.5 ab 17.8 an 18.9 di hy mt 17. 5.6 12.8 Richmond, Cape Col¬ ony. Feder. E. Cohen, N. J. B. B. V., p. 240, 1887. Quartz-diaPase. Q 11.9 or 13.9 ab 40.3 an 17.2 di hy mt 7.6 2.3 5.1 Mount Lambie, Rydal, New South Wales. A. Liversidge. A. Liversidge, J. R. Soc. N. S. W., XVI., p. 44, 1883. Quartz- porphyry. SUBRANG 5. PERSODIC. PLACEROSE. Q 23.8 hy 15.6 or 1.7 mt 2.8 ab 26.2 an 22.0 c 3.2 FeSo 0.08 Q 14.3 di 7.6 NiO 0.02 or 4.4 hy 10.2 SrO trace ab 32.0 mt 2.8 LLO trace an 26.7 il 1.1 SrO trace Q 21.1 di 11.1 LioO trace or 1.7 WO 3.0 ab 34.6 mt 0.7 an 26.1 il 0.9 so 3 trace Q 12.8 di 4.8 FeS 2 0.34 or 3.9 hy 11.3 SrO trace ab 37.7 mt 3.2 LLO none an 22.8 il 1.2 SrO trace Q 21.9 hy 12.8 LioO none or 1.7 mt 4.6 ab 31.4 il i.i an 21.7 c 1.0 Q 21.0 di 2.8 or 4.4 hy 7.8 ab 34.6 an 24.5 mt 1.9 Q 99 8 di 3.7 or 4. 5 hy 5.4 ab 33.5 mt 4.2 an 24.5 S none Q 11.5 di 15.4 or 2.8 hy 9.0 ab 33.5 mt 3.5 an 18.3 ZrOo trace Q 10.9 di 6.9 Cl 0.06 or 1.7 hy 7.0 S none ab 37.7 mt 9.0 CoO none an 24.7 Cu 0.04 Pb none Q 19.7 di 3.8 or 4.4 hy 6.3 ab 28.8 mt 9.0 an 26.4 Ely, Minnesota. St. Augustine Vol¬ cano, Cook Inlet, Alaska. English Mountain, Placer County, Cal¬ ifornia. Ophir, Placer County, California. Jenny Lind, Cala¬ veras County, Cal¬ ifornia. Pebbly Beach, Santa Catalina Island, California. Xico Island, Lake Chaleo, Mexico. Caman’s, Barama River, British Guiana. Mazaruni District, British Guiana. Bandai San, Japan. G. F. Sidener. W. F. Hille- brand. W. F. Hille- brand. W. F. Hille- brand. W. F. Hille- brand. W. S. T. Smith. A. Roll rig. J. B. Harrison. J. B. Harrison. Shimidzu. N. H. Winchell, 23 A.R.G.Nh.S.Minn.. p. 204, 1895. G. F. Becker, 18 A. R. U. S. G. S.,III, p. 52, 1898. W. Lindgren, B. U. S. G. S., 148, p. 212, 1897. W. Lindgren, 14 A. R. U. S. G. S.,II, p. 262, 1894. H. W. Turner, 14 A. R. U. S. G. S.,II, p. 473, 1894. W. S. T. Smith, Pr. Cal. Ac. Sc.,Geol. I, p. 25, 1897. H. Lenk, Btr. G. Mex., II, p. 233, 1899. J. B. Harrison, Rep. G. N. W. Dist. p. 12, 1898. J. B. Harrison, Priv. Contrib. T. Wada, Mt. D. Ges. Ostas., V., p. 74, 1889. Felsite. Augite-bronz- ite-andesite. . c , Augite-gramte. Dike rock, al¬ lied to camp- tonite. Porphyrite. Porphvrite. Hornblende- andesite. Diabase. Mica-diorite. Augite-andes- ite. Bomb. Not fresh. Dried at 100°. Dried at 100°. MnO high? Alkalies corr. cf. N. J., 1890, II, p. 102. 246 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS II. DOSALANE—Continued. RANG 4. DOCALCIC. BANDASE. No. Si0 2 A1 2 0 3 Fe 2 0 3 FeO MgO CaO Na 2 0 k 2 o h 2 o+ H 2 0- co 2 Ti0 2 PA MnO BaO Sum Sp. gr. 1 56. 42 16. 81 3. 26 6. 92 3.50 5. 64 1.21 3. 07 2. 25 1.08 0. 23 100. 39 2. 625 A3. Ill .940 .165 .020 .096 .088 .101 .019 .033 .008 .003 2 55. 48 19. 61 4. 06 6. 05 3. 06 8. 75 0.15 1.94 1.18 100. 28 A3. Ill .925 .192 .025 .085 .077 . 156 .002 .021 RANG 4. DOCALCIC. BANDASE. 1 54.61 15. 23 3. 51 4. 80 4. 69 7.41 1. 46 2. 70 2. 47 0. 32 1.46 0. 86 0. 35. 0. 09 0.11 100.11 Al. I .910 .149 .022 .067 .117 .132 .023 .029 .011 .003 .001 .001 2 56. 44 16.17 7. 72 3. 00 2. 02 10.13 1. 17 1.18 2. 37 0.30 100. 50 A3. Ill .941 .158 .049 .042 .051 .180 .019 .013 .004 3 60. 50 15. 95 6. 27 2. 89 3.82 6.51 1.65 2. 24 0. 84 100.67 2. 69 A3. Ill 1.008 .156 .039 .040 . 096 .116 .027 .023 4 59. 55 18.08 2.15 3.13 1.40 9. 36 1.53 2. 06 2. 27 0. 39 0. 24 100. 51 A3. Ill .993 .177 .014 .043 .035 .168 .024 .022 .003 .003 5 57. 69 17.43 0. 94 4. 09 4.80 7.18 1. 69 3. 06 2.83 0. 43 0.18 100. 32 A3. Ill .962 .170 .006 .057 .• .120 .128 .030 .033 .003 .002 6 60. 50 15. 05 1.43 6. 07 3.11 8.61 1. 83 2. 02 0. 21 1.12 0.34 100.29 A3. Ill 1.008 .147 .009 .085 .078 .153 .030 .021 .008 . 005 7 51.15 15. 92 9. 34 2. 87 6. 48 10. 40 1.19 1. 61 0.11 0. 44 0. 06 0.09 99.66 A2. 11 .853 . 156 .058 .040 .162 .185 .019 .017 .006 — .001 8 63.41 16. 50 2. 53 3.36 2. 74 5.80 1.90 2. 26 1.55 0.10 trace 100.15 2. 498 A3. Ill 1.057 .161 .015 .047 .069 .103 .030 .024 .001 — RANG 4. DOCALCIC. BANDASE. 1 58. 57 16.10 2. 89 6.12 2.33 7.39 2. 11 1.01 1.27 0.21 none 1.41 0.37 0.18 trace 100.07 Al. I .976 .158 .018 .085 .058 .132 ' .034 .011 .018 .003 .002 2 56.41 15.19 1. 60 6. 24 7.18 6. 77 2.21 1.34 2.00 0. 08 0. 69 0.05 0.11 100. 06 Al. I .940 .149 .010 .087 .180 .121 .035 .014 .009 — .002 3 55. 97 15. 60 1.21 6. 28 6.83 7.31 2. 23 1.25 1.85 0.18 1. 11 0. 16 0. 08 100.10 Al. I .933 .153 .007 .088 .171 .130 .036 .014 .013 .001 .001 4 55.16 17. 51 2.62 5.83 4. 35 8. 50 1.83 1.08 2.01 0.18 none 0. 64 0. 21 0. 15 trace 100.17 Al. I .919 .172 .016 .081 .109 .151 .029 .012 .008 .002 .002 — 5 52. 94 14. 70 2.52 7.80 4. 49 6. 56 3. 09 0. 04 2.04 4. 86 99. 04 B3. IV .882 .144 .016 .108 .112 .117 .050 — 6 52.31 18.35 5. 90 11.06 1. 00 7. 33 2.90 0. 49 0. 35 99. 69 A3. Ill .872 .180 .037 .154 .025 .130 .047 .005 DOSALANE-BANDOSE. 247 ORDER 4. QUARDOFELIC. AUSTRARE—Continued. SUBRANG 1. PREPOTASSIC. SAGAMOSE. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. • Q 15.7 hy 18.8 or 18.3 mt 4.6 ab 10.0 an 28.1 C 1.2 Monte Rado, n. Lake Bolsena, Italy. L. Ricciardi. C. Klein, Sb. Berl. Ak., p. 119, 1888. Augite-an des¬ ite. Also in N. J. B. B., VI, p. 33, 1889. Q 22.1 hy 15.6 or 11.7 mt 5.8 ab 1.0 an 43.4 Hokizawa, Sagami, Japan. Not stated. T. Harada, Die. Jap. Inseln. Berlin, 1890, p. 118. Tonalite. SUBRANG 2. SODIPOTASSIC. Zr0 2 S0 3 Cl SrO LUO none none none 0.04 trace Q 13.6 or 16.1 ab 12.1 an 27.0 di 7.9 hy 12. 6 mt 5.1 il 1.5 Zosel District, Daylight, Montana. H. N. Stokes. W. H. Weed, B. U. S. G. S. 168, p. 119, 1900. Andesite-por¬ phyry. Not fresh. Q 23.5 or 7.2 ab 10.0 an 35.0 di 11.5 mt 9.7 hm 1.1 Koijiirvi, TJrjala, Finland. A. W. Forsberg. J. J. Sederholm, Finl. G. Und. Bl., 18, p. 49,1890. TJralite-por- phyry. Also in T. M. P. M., XII, p. ' 120,1891. Q 23.4 or 12.8 ab 14.1 an 29.5 di 2.2 hy 8.6 mt 9.2 Unkersdorf, Saxony. W. Bruhns. W. Bruhns, Z. D.G.G., XXXVIII, p. 752,1886. Augite- hornblende- porphyrite. so 3 Cl 0.35 trace Q, 21.2 or 12.2 ab 12. 6 an 36.4 di 8.7 hy 3.0 mt 3.2 Monte Cimino, Vi¬ terbo, Italy. L. Ricciardi. A- A'erri, B.Soc.G. Ital., VIII, p.403,1889. Andesite. Alkalies? so 3 trace Q 10.7 or 18.3 ab 15.7 an 29. 7 di 4.9 hy 16.4 mt 1.4 Monte Cimino, Vi¬ terbo, Italy. L. Ricciardi. A. V erri, B. Soc. G. Ital., VIII, p.403,1889. Andesite. Alkalies? > Q 19.4 or 11.7 ab 15.7 an 26. 7 di 7.7 hy 14.1 mt J2.1 ap 2.5 Lava of 1888, Volca¬ no, Aeolian Islands. L. Ricciardi. G. Merealli, Gior. Min., Ill, p. 110, 1892. Andesite. Q 10.2 or 9.5 ab 10.0 an 33.4 di 14.1 hy 9.7 mt 7.9 il 0.9 hm 3.5 Seven Pagodas, Chingelput, Madras, India. P. Bruhl. T. H. Holland, Rec. G. S. India, XXX, p. 35,1897. Augite-diorite. Nearly in salfe- mane. Also in Q. J. G. S., LIII, p. 409, 1897. Q 25.6 or 13.3 ab 15.7 an 28.6 C 0.4 hy 11.1 mt 3.5 Singalang Volcano, Sumatra. Iv. Sillib. A. Merian, N. J. B. B., Ill, p. 302, 1885. Ilypersthene- andesite. SUBRANG 3. PRESODIC. BANDOSE. Zr0 2 0.09 Q 21.3 di 4.5 Cr 2 d 3 none or 6.1 hy 10.0 v»o 3 0.02 ab 17.8 mt 4.2 NiO trace an 31.4 il 2.8 SrO trace ZrO» 0.14 Q 10.6 di 4.8 Cr 2 0 3 0.05 or 7.8 hy 24.8 ab 18.3 mt 2.3 an 27.8 il 1.4 Cr 2 0 3 0.04 Q 9.7 di 6.0 Li 2 0 trace or 7.8 hy 23.1 ab 18.9 mt 1 6 an 28.6 il 2.0 Zr0 2 0.02 Q 13.5 di 4.6 FeS 2 0.03 or 6.7 hy 16.2 Cr..0 3 trace ab 15.2 mt 3.7 v 2 o 3 o ol an 36.4 il 1.2 NiO 0.01 SrO trace Q 10.0 di 5.3 or none hy 20.8 ab 26.2 mt 3.7 an 26.1 Q 9.7 hy 17.9 or 2.8 mt 8.6 ab 24.6 an 35.6 Stone Run, Cecil County, Maryland. Georgetown, District of Columbia. Triadelphia, Mont¬ gomery County, Maryland. Octoraro Creek, Cecil County, Maryland. Ely, Minnesota. Granite Falls, Yellow Medicine County, Minnesota. W. F. Hille- brand. W. F. Hille- brand. W. F. Hille- brand. W. F. Hille- brand. C. F. Sidener. Id. N. Stokes. A. G. Leonard, E. U. S. G. S., 168, p. 45, 1900. G. H. Williams, 15 A. R. U. S. G. S., p. 673, 1895. G. Id. Williams, 15 A. R. U. S. G. S., p. 673, 1895. A. G. Leonard, B. U. S. G. S., 168, p. 45, 1900. | N. H. Winchell, 23 A. R. G. Nh. S., Minn., p. 204, 1895. W. S. Baylev, B. U. S. G. S., 150, p. 286, 1898. Quartz-diorite. Biotite-diorite. Biotite-diorite. Quartz-diorite. Felsite. Sum low. Not fresh. Gabbro. 248 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS II. DOSALANE—Continued. RANG 4. DOCALCIC. BANDASE—Continued. No. Si0 2 A1.A FeA FeO MgO CaO Na 2 G Iv 2 0 H 2 0+ h 2 o- C0 2 Ti0 2 PA MnO BaO Sum Sp. gr. 7 56. 74 18. 80 0.15 6.91 5.57 7.34 2.32 0. 77 1.09 0. 20 0. 07 99. 96 2. 876 A3. Ill .946 .184 .001 .096 .139 .131 .037 « .008 .001 .001 27° 8 61.58 15. 89 2.19 5. 50 2.69 6. 49 3. 04 0.51 1.26 0. 16 none 0. 63 0. 12 0.20 0. 06 100. 38 Al. I 1.026 . 156 .014 . 076 .067 .116 .049 .006 .008 .001 .003 — 9 56. 51 18.10 4. 26 2. 68 4.52 8. 15 3.23 1.15 0. 69 0. 48 0. 14 0.11 0.04 100.10 Al. I .942 . 177 .027 .038 .113 .145 . 051 .013 .006 .001 .002 — 10 57.04 19. 11 4.37 2. 48 3.94 7.34 3. 48 1. 16 1.09 0.47 0. 08 0.12 . trace? 100. 70 Al. I .951 .187 .027. .035 .099 .131 . 056 . 013 .006 .001 .002 — 11 53.19 17.12 4. 35 5.16 3.98 9.39 2. 79 0. 28 1.21 0.17 1.34 0.13 trace trace 100.05 Al. I .887 .168 .027 .072 .100 .168 .045 .003 .016 .001 — 12 60. 96 18.06 1.42 2. 48 5. 09 6. 67 2. 39 0. 28 1.26 0. 04 1.10 0. 25 0.34 100. 34 2. 856 A2. II 1.016 .177 .009 .035 .127 .120 .039 .003 .014 .002 .005 13 60. 35 18. 71 2.10 2.15 4.08 7. 18 1.54 0. 32 1.50 0.08 0. 70 0. 29 0. 66 99. 67 A2. II 1.006 .183 .013 .030 .102 .128 .025 .003 .009 .002 .009 14 52. 02 17.14 7.96 3.52 3.13 11. 57 2. 38 0. 60 0. 28 trace trace 99.45 2. 76 A3. Ill .867 .168 .050 .049 .078 .207 .039 .006 — — 16° 15 59. 25 16. 75 4. 00 4. 82 3.81 6. 88 2. 56 1.92 n. d. trace • 99.99 A3. Ill .988 .164 .025 . 067 .095 .123 .041 .020 16 58. 30 16.14 4. 76 4.50 2. 68 10. 96 1. 74 0. 94 n. d. 100. 02 2. 842 A3. Ill .972 .158 .030 *062 . 067 .196 .028 .010 17 60. 50 20. 40 1.49 2. 93 2.91 6. 20 3.48 1.32 0.50 99. 77 A3. Ill 1.00s .200 .009 .040 .073 . no .050 .013 18 62.21 15.60 5. 26 1. 36 2.61 6. 55 2.50 1.63 2. 25 99. 97 A3. Ill 1.035 .153 .033 .019 . 065 .117 .040 .017 19 56. 31 20. 83 4.13 1.87 4.91 7. 54 1. 85 1.07 1.23 99. 74 A3. Ill .939 .204 .025 .026 .123 .134 .030 .012 20 54. 39 17. 85 6. 53 4. 71 3. 98 6. 37 2. 99 1.05 2. 59 100.46 A3. Ill .907 . 175 .041 . 065 .100 .114 .048 .011 21 53. 14 17. 82 8. 69 1.98 4. 58 7.26 1.51 1.18 3. 26 99. 42 A3. Ill .886 .174 .054 .028 .115 .129 .024 .013 (99.52) 22 62. 42 17. 15 1.02 5.91 2.14 6.39 2.09 1.21 0. 53 1.45 0. 29 100. 60 A3. Ill 1.040 .168 .006 .082 .054 . 114 .034 .013 .010 .004 23 56. 38 17. 48 5.30 2. 72 3.10 10. 89 1.77 1.38 0. 52 0.33 99. 87 2. 468 A3. Ill .935 .171 .033 .038 .077 .194 .029 .015 .004 24 55. 83 18. 96 5. 64 3. 23 2. 76 7.40 3.12 1.17 1.20 0. 32 99. 63 2. 647 A3. Ill .931 .186 .035 .045 .068 .132 .050 .013 .004 DOSALANE-BANDOSE. 249 ORDER 4. QUARDOFELIC. AUSTRARE—Continued. SUBRANG 3. PRESODIC. BANDOSE—Continued. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. Q 10 8 or 4.4 ab 19.4 an 36.4 C 0.8 hv mt 26 5 0.2 Mount Morrison, Denver Colorado. L. G. Eakins. W. Cross, B. U. S. G. S., 148, p. 159, 1897. Enstatite- diabase- porpbyry. FeS» NiO' SrO Li 2 0 0.06 trace? trace? trace Q 21.5 or 3.3 ab 25.7 an 28.1 di hy mt il 3.5 12.2 3.2 1.2 Karluk, Kadiak Is¬ land, Alaska. W. F. Hille- brand. G. F. Becker, 18 A. R. U. S. G. S., Ill, p. 42, 1898. Diorite. Cr 2 0 3 SrO Li,0 trace? 0.04 trace Q 10.9 or 7.2 ab 26.7 an 31.4 di hy mt il 7. 1 8. i; 6.3 0.9 Lassen Peak, California. W. F. Hille- brand. J. S. Diller, B. U. S. G. S., 79, p. 29, 1891. Quartz-basalt. Dried at 105°. SrO Li,,0 0.02 trace Q 11.2 or 7.2 ab 29. 3 an 32. 8 di hy mt il 2.9 8.8 6.3 0.9 Suppan’s Mountain, Tehama County, California. W. F. Hille- brand. J. S. Diller, B. U. S. G. S., 148, p. 196, 1897. ypersthene- andesite. Dried at 110°. Secretion in No. 49, tonalose. FeS» Cr 2 0 3 0.94 none Q 10A or 1. 7 ab 23.6 an 33.4 di hy mt il pr 10.6 9.5 6.3 2.5 0.9 Grass Valley, Nevada County, California. H. N. Stokes. W. Lindgren, 17 A. R. U. S. G. S., II, p. 71, 1896. Diabase. S trace Q 23.1 or 1. 7 ab 20.4 an 33.4 C 1.5 hy mt il 14.3 2.1 2.2 Smith’s Post Island, Essequibo River, British Guiana. J. B. Harrison. J. B. Harrison, Rep. G. Esseq. Riv., 1900, p. 43. Diorite. Dried at 110°. “Altered.” s trace Q 28.3 or 1.7 ab 13.1 an 35. 6 C 2.8 hy mt il 11.3 3.0 1.4 Smith’s Post Island, Essequibo River, British Guiana. J. B. Flarrison. J. B. Harrison, Rep. G. Esseq. Riv , 1900, p. 43. Diorite. Dried at 110°. so 3 Cl trace trace Q 11.3 or 3.3 ab 20.4 an 34.2 di 16.9 wo 0.8 mt 11.5 Portaiiuela, Yate Volcano, Pata¬ gonia. H. Ziegen speck. H. Ziegenspeck, In. Diss., Jena, 1883, p. 29. Basalt ? Sum low. Q 15.5 or 11.1 ab 21.5 an 28.6 di hy mt 4.5 12.8 5.8 Great Ayton, Eng¬ land. J. E. Stead. J. J. H. Teall, Q. J. G. S., XL, p. 224, 1884. Andesite. Near tonalose, cf. No. 83. Calc, to 100%? Q 19.9 or 5.6 ab 14.6 an 33.4 di hy mt 17.3 2.5 7.0 Castle Rock, Tyne¬ mouth, England. J. E. Stead. J. J. H. Teall, Q. J. G. S., XL, p. 235, 1884. Andesite. Calc, to 100%? Q 18.4 or 7.2 ab 26.2 an 30. 6 C 2.8 hy mt 11.3 2.1 Vallee de Barboull- iere, Pyrenees Mountains, France. A. Pisani. A Lacroix, B. S. C. G. Fr., XI, No. 71, P-31,1900. Hornblende- granite. Q 24.9 or 9.5 ab 21.0 an 26.7 di hy mt hm 4.5 4.4 4.4 2.2 San Pedro, Cabo de Gata, Almeria, Spain. Kottenhain. A. Osann, Z. D. G. G., XLIII, p. 702, 1891. Hvpersthen''- dacite. Near tonalose. Q 17.7 or 6.7 ab 15. 7 an 37.3 C 2.9 hy mt 12.4 5.8 Arnsdorf, Riesenge- birge, Silesia. Herz. L. Milch, N. J. B. B., XII, p. 213, 1899. Lamprophyr Q 12.1 or 6.1 ab 25.2 an 31. 7 C 0.2 hy 13.1 mt 9.5 Lupsa Valley, Per- sanyer Mountains, Hungary. Herbich. J. Budai, F. K., XVI, p. 267, 1886. Diabase. Q 17.5 or 7.2 ab 12.6 an 35.9 C 0.8 hy 11. 5 mt 6.5 hm 4.2 Szekelyko, Sieben- burgen, Hungary. J. v. Szacleczky. J. v. Szadeczky, F. K., XXli, p. 324, 1892. Labradorite- porphyry. Q 24.0 or 7.2 ab 17.8 an 31.7 C 0.7 hy mt 15.4 1.4 Lava of 1888. Vul- cano, jEolian Islands. L. Ricciardi. G. Mercalli, Gior. Min., Ill, p. 110, 1892. Andesite. Q 16.1 or 8.3 ab 15.2 an 35.3 di hy mt 14.7 1.5 7.7 Kaimeni, Methana, Greece. A. Rohrig. 11. S. Washington, J. G., Ill, p. 150, 1895. Hornblende- andesite. Segregation in No. 114, ton¬ alose. Cl trace Q 13.5 or 7.2 ab 26.2 an 34.2 di hv mt il 2.3 6.8 8.1 0.6 Ivosona, Methana, Greece. A. Rohrig. II. S. Washington, . J. G., Ill, p. 150,1895. Hornblende- andesite. Segregation in No. 55, yel- lowstonose. 250 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS II. DOSALANE—Continued. RANG 4. DOCALCIC. BANDASE—Continued. No. Si0 2 A1 2 0 3 Fe 2 0 3 FeO MgO CaO Na 2 0 k 2 o h 2 o+ H 2 0- O o Ti0 2 PA MnO BaO Sum Sp. gr. 25 55. 87 22.40 2. 52 1.80 2.99 9.20 1.80 0. 39 2. 66 0. 16 99. 79 2. 268 A3. Ill .932 .219 .016 .025 .074 .164 .029 .004 .002 26 59.66 15.51 3. 76 5.40 3. 67 6. 56 2.50 1.08 n.d. 0.18 1.40 100.31 A3. Ill .994 .152 .024 .075 .092 .117 .040 .011 .001 .020 27 59. 47 17.12 2. 33 5.69 4. 04 7.24 2.23 0. 30 1.35 99.77 A3. Ill .991 .168 .014 .079 .101 .128 .035 .003 28 57. 47 19. 20 3. 83 3. 22 0. 49 9.35 2. 47 1.36 0. 39 0.12 trace 0. 97 99.10 2. 738 B3. IV .958 .188 .024 .044 .012 .167 .040 .015 .014 21° CLASS II. DOSALANE. RANG 1. PERALKALIC. UMPTEKASE. 1 58.04 17.24 2. 49 1.24 1.79 3.50 3. 37 10. 06 1.95 0. 30 0. 22 trace 100.58 .09 A2. II .967 .169 .015 .017 .045 .062 . 055 .107 .004 .002 — 100.49 2 61.28 14. 71 1.21 2. 85 1.69 5.61 2.99 7. 70 0. 43 0. 28 0. 41 0.16 trace 0. 72 100.16 Al. I 1.021 .144 .007 .040 .042 .100 .048 .082 .005 .001 — .005 3 55.49 14.57 8.68 0. 66 3. 61 0. 68 1.86 7. 87 3. 96 1. 78 0. 27 99.43 2.839 B2. Ill .925 .143 .054 .009 .090 .012 .030 .084 .022 .002 RANG 1. PERALKALIC. UMPTEKASE. 1 62. 99 14. 25 2. 78 5.15 1.30 2. 72 4. 86 6.35 0.18 0.16 0. 18 100. 92 2. 732 B2. III. 1.050 .140 .017 .072 .033 .049 0.78 .068 .002 .003 2 57. 49 16. 54 4. 85 0. 63 4. 73 1.07 3. 79 7.23 3. 08 0. 94 0. 43 100. 89 2.618 B2. III. .958 .162 .030 .009 .118 .019 .061 .077 .012 .003 3 56. 99 15.65 3. 56 1.99 4. 43 3. 75 4.41 6.50 2. 22 0.83 0. 41 100. 84 2. 681 B2. III. .950 .153 .022 .028 .in .067 .071 .069 .010 .003 4 57. 33 14. 06 2.07 3. 59 3. 55 5. 68 3.34 6. 32 3. 08 1.05 0. 09 100.16 A2. II. .956 .138 .013' .050 .089 .102 .054 .067 .013 .001 5 64. 46 14. 96 0. 95 3. 73 1.36 3. 30 4. 39 5. 44 1.07 trace none trace 99.66 A3. III. 1.074 .147 .006 0.52 0.34 .059 .071 .058 — — — 6 55.26 16. 36 5. 26 2. 90 1.14 3.90 4.08 8. 82 1.20 0. 36 99. 28 B3. IV. .921 .160 .033 .040 .029 .054 .066 .093 .005 7 57.91 15. 79 6.81 0.01 1.66 2. 99 6.01 7.27 0. 34 0. 65 0. 01 0. 23 100. 29 2. 516 A2. II. .965 .154 .042 .042 .053 .097 .078 .008 — .003 1 DOSALANE—1LMENOSE. 251 ORDER 4. QUARDOFELIC. AUSTRARE—Continued. SUBRANG 3. PRESODIC. BANDOSE—Continued. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. Q 19.4 or 2.2 ab 15. 2 an 45.6 C 2.2 hv 8.7 mt 3.7 Kakoperato, Aegina, Greece. A. Roll rig. II. S. Washington, J. G., Ill, p. 150,1895. Hornblende- andesite. Segregation in No. 19, da- cose. Nearly in persa- lane. S 0.59 Q 19.6 or 6.1 ab 21.0 an 28.1 di 3.7 hy 14.2 mt 5.6 Obandai. Bandai San, Japan. Shimidzu. T. Wada, Mt. D. Ges. Ostas., V, p. 74, 1889. Augite-andesite. MnO high? Aik. corr., cf. N. J., 1890, II, p. 102. Q 20.5 or 1.7 ab 18.3 an 35.6 C 0.2 hy 18.7 mt 3.2 Bandai San, Japan. Nishiyama. Nishiyama, cf. N. J., 1890, II, p. 102. Andesite. S0 3 0.23 Q 17.5 or 8.3 ab 21.0 an 37.0 di 7.8 mt 5.6 Volcano, New Britain, Pacific Ocean. A. Liversidge. A. Liversidge, J. R. Soc. N. S. W., XVI, p. 50, 1883. Lava. Sum low. ORDER 5. PERFELIC. GERMANARE. SUBRANG 2. DOPOTASSIC. HIGHWOODOSE. S0 3 trace or 59.5 di 9.7 Highwood Gap, E. B. Hurlbut. L. V. Pirsson, Trachyte. Cl 0.38 ab 14. 7 mt 2.6 an 3.3 il 0.6 Highwood Moun- B. U. S. G. S., 148, ne 2.0 hm 0.6 tains, Montana. p. 152, 1897. so 4.9 ap 0.4 S0 3 0.08 Q 3.4 di 16.0 Turnback Creek, H. N. Stokes. H. W. Turner, Augite-svenite. SrO 0.04 or 45.6 wo 1.9 Tuolumne County, B. TJ. S. Gr. S., 148, an 3.9 il 0.8 California. p. 217, 1897. Q 7.6 hy 9.0 Winterbach, Fischer. K. A. Lossen, Augite-syenite- Iron oxides and or 46.7 il 1.5 ab 15.7 hm 8.7 n. St. Wendel, Jb. Pr. G. L-A., X, porphyry. Ti0 2 ? an 3.3 ru 1.0 Harz Mountains. p. 266, 1892. C 1.7 SUBRANG 3. SODIPOTASSIO. ILMENOSE. S0 3 0.11 S0 3 0.10 Cl 0.61 Q 2.6 ac 2.8 or 37.8 di 11.5 ab 37.7 hy 5.5 mt 2.6 or 42.8 hy 6.6 ab 32.0 ol 3.7 an 5.3 il 1.6 C 0.5 hm 4.9 or 38.4 di 9.6 ab 32.5 ol 4.7 an 3.6 mt 4.2 ne 2.6 il 1.5 hm 0.6 ap 1.0 or 37.3 di 19.1 ab 28.3 hv 3.0 an 4.7 mt 3.0 il 2.0 Q 8.6 di 9.5 or 32.2 hv 4.7 ab 37.2 mt 1.4 an 5.0 or 51.7 di 8.0 ab 19.9 WO 2.0 an 0.3 mt 7.7 ne 0.8 Q 0.7 ac 6.0 or 43.4 di 9.1 ab 26.2 WO 1.3 so 8.2 hm 3.4 Beverley, Essex County, Massachusetts. Gotteskopf, n. Ilmenau, Thuringia. Gotteskopf, n. Ilmenau, Thuringia. Gailbach, Spessart, Bavaria. Hengstberg, n. Grimma, Saxony. Madonna di Lauro, Vetralla, Viterbo, Italy. Mte. Santo, Naples, Italy. F. E. Wright. F. E. Wright, T. M. P. M., XIX, p. 318, 1900. Umptekite. Fischer. H. Loretz, Jb. Pr. G. L-A., XIII, p. 135, 1893. Porphyrite. Fischer. IL. Loretz, Jb. Pr. G. L-A., XIII, p. 135, 1893. Porphyrite. E. Goller. E. Goller, N. J. B. B., VI, p. 566, 1889. Kersantite. P. Jannasch. II. Rosenbusch, Elemente, p. 269, 1898. Pyroxene- quartz- porphyry. A. Rohrig. H. S. Washington, J. G., IV, p. 849, 1896. Leucite- trachvte. H. J. Johnston- Lavis. II. J. Johnston-Lavis, Genl. Mag. Dec. Ill, VI, p. 77, 1889. Trachyte. Iron oxides? Near monzo- nose. Sum low. Also in B. C. G., Ital., XX, p. 136,1889. Iron oxides? 252 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS II. DOSALANE—Continued. RANG 3. PERALKALIC. UMPTEKASE—Continued. No. SiO, A1 2 0 3 Fe-A FeO MgO CaO Na 2 0 k 2 o H.,CH H 2 0- C0 2 Ti0 2 PA MnO BaO Sum Sp. gr. 1 59.01 18.18 1.63 3. 65 1. 05 2. 40 7. 03 5.34 0. 50 0.15 0. 81 trace 0. 03 0.08 99. 98 Al. I. .984 .178 .010 0.51 . 026 .043 .113 . 057 .010 — .001 2 64. 28 15.97 2.91 3. 18 0. 03 0. 85 7. 28 5. 07 0. 20 0.50 0. 08 trace none 100. 33 2. 703 A2. II. 1.071 .156 .018 .044 .001 .015 .117 .054 * .006 .001 — 22° 3 59. 66 16.97 3.18 1. 15 0. 80 2. 32 8. 38 4.17 2. 53 0. 07 trace 0.14 0.19 99. 56 A2. II. .994 .166 .034 .016 .020 .042 .135 .044 — .001 .003 4 63. 69 15. 03 2.51 2. 41 0. 80 3.30 6. 54 2. 46 2. 23 trace 0. 55 99. 52 2.55 A3. III. 1.062 .147 .015 .033 .020 .059 .105 .026 — .008 15° 5 58. 81 18. 54 5.00 1.80 1.02 3. 81 7. 90 3. 06 n. d. 99. 94 A3. Ill .980 .182 .031 .025 .026 .068 .127 .033 6 62. 70 16. 40 3. 34 2. 35 0. 79 0. 95 7.13 5. 25 0. 70 0. 92 trace 100. 53 A2. II 1.045 .161 .021 .033 .020 .017 .115 .056 .011 — 7 60. 50 16. 86 1.67 2. 54 1.11 2. 95 6. 46 5.42 1.40 0. 70 0. 75 0. 21 0. 20 100. 77 A2. II 1.008 . 165 .010 .035 .028 .053 .104 .058 .009 .002 .003 8 58. 90 17. 70 3.94 2.37 0. 54 1.05 7. 39 5.59. 1.90 0.40 trace 0. 55 100. 33 A2. II .982 .173 . 025 .033 .014 .019 .119 .060 .005 — .008 9 57. 52 18. 46 2. 23 2. 44 1.08 2.12 7. 58 4. 08 1.80 0. 92 0. 21 99. 64 A2. II .959 .181 .014 .034 .027 .038 .122 .043 .011 .002 10 57.00 18. 03 1.33 3. 52 1.53 3. 55 7. 53 3. 89 1.30 1.05 0. 55 0. 41 0. 49 ICO. 18 A2. II .950 .177 .008 .049 .038 .063 .121 .041 .007 .003 .007 11 63. 71 16. 59 2. 92 0. 66 0.90 3. 11 8. 26 2. 79 0.19 0. 86 0. 20 100.19 A2. II 1.062 .163 .018 .009 .023 . 056 .135 .030 .011 .003 12 57. 78 15. 45 3. 06 3.11 1.13 1.72 11.03 2. 89 0. 94 1. 83 0.98 99. 92 • A2. II .963 .151 .019 .043 .028 .031 .178 .031 .022 .013 13 60. 89 17.16 3. 60 3.18 0. 49 3. 07 6. 88 4. 23 0. 37 99.87 A3. Ill 1.015 .168 .022 .044 .012 . 055 .ill .045 ■ 14 61.01 16. 62 3. 55 2.81 0. 06 3. 27 5.92 5. 22 1. 13 trace 0. 55 100.14 A3. Ill 1.017 .163 .022 * .039 .002 .058 .095 .056 .008 DOSALANE-UMPTEKOSE. 253 ORDER 5. PERFELIC. GERMANARE—Continued. SUBRANG 4. DOSODIC. UMPTEKOSE. Inclusive. vr Norm. Locality. 1 Analyst. Reference. Author’s name. Remarks. ZrOo Cl SrO LUO trace 0.12 trace trace or 31.7 ab 41.9 an 2.2 ne 9.9 di 8.2 ol 1.9 mt 2.3 il 1.5 Red Hill, New Hampshire. W. F. Hi Re¬ brand. W. S. Bavley, B. G. S. A., Ill, p. 250, 1892. Nephelite-sve- nite. Near laurdalose. Q 2.0 or 30.0 ab 53.4 ac 6.9 di 3.7 hy 2.8 mt 0.7 il 0.9 Andrews Point, Cape Ann, Essex County, Massachusetts. H. S. Washing¬ ton. H. S. Washington, A. J. S„ VI, p. 178, 1898. Glaucophane- solvsbergite. Dried at 110°. or 24.5 ab 48.7 ne 8.2 ac 6.0 di 4.3 wo 2.5 mt 3.7 hm 0.8 Peaked Butte, Crazy Mountains, Mon¬ tana. W. H. Melville. Wolff and Tarr, B. M. C. Z., XVI, p. 232, 1893. Nephelite- syenite. so 3 Cl Cu trace trace trace Q 9.8 or 14.5 ab 55.0 an 4.4 di 9.4 mt 3.5 Yate Volcano, Pata¬ gonia. H. Ziegenspeck. FI. Ziegenspeck, In. Diss., Jena, p. 42, 1883. Augite-andesite. Near pantelle- rose and kal- lerudose. or 18.3 ab 54.0 an 6.1 ne 6.8 di 5.6 wo 2.3 mt 5.8 hm 1.0 Ostvaago, Lofoten Islands, Norway. T. Matthiesen. C. F. Kolderup, Berg. Mus. Aarb., 1898, No. 7, p. 23. Labradorite- rock. Near akerose. or 31.1 ab 55.0 ac 4.6 di 3.9 ol 1.1 mt 2.6 il 1.7 Laugendal, Norway. L. Sehmelck. W, C. Brogger, Eg. Kg. I, p. 80,1894. Hornblende- solvsbergite. or 32.2 ab 46.1 an 0.8 ne 4.5 di 10.1 wo 0.6 mt 2.3 il 1.4 Osto, Christiania Fjord, Norway. V. Sehmelck. W. C. Brogger, Eg. Kg., Ill, p. 190, 1899. “ Hedrumite. or 33.4 ab 43.0 ne 8.8 ac 2.8 di 4.7 ol 1.0 mt 4.4 il 0.8 Kjose Aklungen, Norway. V. Sehmelck. W. C. Brogger, Eg. Kg., I, p. 102,1894. Aegirite-mica- solvsbergite. or 23.9 ab 50.3 an 4.4 ne 7.4 di 5.1 ol 2.1 mt 3.2 il 1.7 Skirstad Lake, Gran, Norway. L. Sehmelck. W. C. Brogger, Eg. Kg., I, p.181,1894. Foyaite. “Hedrumite” in Eg. Kg. Ill, p. 190, 1899. or 22.8 ab 45.1 an 4.2 ne 9.9 di 8.4 ol 3.0 mt 1.9 il 1.1 ap 1.1 Brathagen, Laugendal, Norway. TT . Sehmelck. W. C. Brogger, Eg. Kg. Ill, p. 116, 1899. Heumite. Near laurdalose. Border of dike cf. No. 12, es- sexose. or 16.7 ab 69.2 ne 0.3 ac. 0.9 di 5.0 wo 3.9 il 1.7 hm 2.6 Umpjarvi, Ivola, Fin¬ land. W. Petersson. W. Ramsay, Fennia, XI, p. 205, 1894. Umptekite. • or 17.2 ab 52.4 ne 5.7 ac 8.8 ns 4.7 ol 4.0 il 3.4 Tuoljlucht, ITmptek, Kola, Finland. H. Bergholl, V. Hackman, Fennia, XI, No. 2, p. 139, 1894. Nephelite- svenite (Lujavrite). or 25.0 ab 55.5 am 3.3 ne 1.4 di 8.1 wo 1.0 mt 5.1 Steinburg, Wester- wald, Prussia. W. Bruhns. W. Bruhns, Vh. Nh. Ver. Bonn., LIII, p. 51, 1896. Trachyte. Cl trace Q 1.3 or 31.1 ab 49.8 an 3.3 di 4.7 wo 3.1 mt 5.1 Cape Adare, Antarctic Continent. J. A. Schofield. David, Smeeth, and Schofield, V. R. Soc. N. S. W., XXIX., p. 473,1895. Trachyte. Near ilmenose. 254 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS II. DOSALANE—Continued. RANG 2. DOMALKALIC. MONZONASE. No. SiO, ai 2 0 3 Fe 2 0 3 FeO MgO CaO Na 2 0 k 2 o h 2 o+ H 2 0- co 2 Ti0 2 PA MnO BaO Sum Sp. gr. 1 51. 05 14. 49 4.16 4.37 8.16 5.11 1.85 7.25 1.05 1.76 0. 70 99. 94 A2. II .851 .142 .026 .061 .204 .091 .030 .077 .022 .005 2 56. 39 12. 88 2. 36 3. 54., 7.83 4. 06 1.30 7. 84 1.33 2. 07 trace 99. 60 A3. Ill .940 .126 .015 .049 .196 .072 .021 .083 .026 — 3 55. 85 19. 31 3. 77 1.88 1.73 3. 84 3. 39 8. 77 1.14 trace 99. 68 2.648 A3. Ill .931 .189 .024 .026 .043 .068 .055 .094 — 4 57.31 14. 71 1.21 4. 37 7. 80 6.90 1.35 6. 38 0.18 0. 40 trace none 100. 61 A2. II .955 .144 .008 .061 .195 .123 .022 .068 .005 — — 5 55. 46 15. 36 1.34 4. 50 7.90 6. 69 1. 79 6. 63 0. 23 0.15 trace 100. 21 2. 700 A3. Ill .924 .151 .008 .062 .198 .119 .029 .071 — 6 55. 21 19. 81 2. 69 2.86 1.68 4. 61 3.13 8. 45 0. 99 trace 99. 43 2. 609 A3. Ill .920 .194 .016 .040 .042 .082 .050 .090 — 10° RANG 2. DOMALKALIC. MONZONASE. 1 57.97 17.28 2. 23 3. 75 2. 20 4. 33 4. 31 4. 12 0. 57 0.18 0.05 1.54 0. 64 0.15 0. 07 99. 75 Al. I .966 .169 .014 .052 . 055 .077 .071 .044 .018 .004 .002 .001 2 60. 56 16.19 5.19 2.41 1.30 2. 09 4. 78 4. 82 0.51 1.19 0. 30 0.36 99. 70 2. 633 A2. II 1.009 .159 .032 .033 .033 .037 .077 .051 .015 .002 .005 3 61. 65 15.07 2. 03 2.25 3. 67 4.61 4. 35 4. 50 0. 41 0. 26 0. 56 0. 33 0. 09 0. 27 100.15 Al. I 1.028 .148 .013 .031 .092 .083 .070 .048 .007 .002 .001 .002 4 54. 42 14. 28 3. 32 4.13 6.12 7. 72 3.44 4. 22 0. 38 0. 22 0. 80 0. 59 0.10 0. 32 100.19 Al. I .907 .140 .021 .059 .153 .138 . 055 .045 .010 .004 .001 .002 5 52. 26 13. 96 2. 76 4.45 8.21 7. 06 2. 80 3. 87 1.34 1.53 0. 49 0.58 0.52 0.14 0. 23 100. 25 Al. I .871 .137 .017 .062 .205 .126 .045 .041 .007 .003 .002 .002 6 52. 81 15. 66 3.06 4. 76 4. 99 7. 57 3. 60. 4. 84 0. 93 0.16 0. 71 0. 75 trace 0. 24 100. 22 Al. I .880 .152 .019 .066 .125 .135 .058 .051 .009 .005 —- .002 7 Al. I 55. 23 .921 18.31 .179 4. 90 .030 2. 06 .030 1.85 .046 3.62 .064 4.02 .064 6. 43 .068 1.84 none 0. 42 .005 0.58 .004 trace 0. 46 .003 100. 27 .08 100.19 8 51. 65 13. 89 2. 70 4. 80 11.56 4.07 2. 99 4.15 1.89 1.30 0. 55 0.21 0.15 0.19 100. 37 Al. I .861 .136 .017 .067 .289 .073 .048 .044 • .007 .002 .002 .001 9 57.29 18. 45 4. 38 1.20 2. 08 3.57 4. 43 5.43 2. 01 0.17 0. 72 0. 46 trace 100. 31 A2. II . 955 .181 .027 .017 .052 .064 .071 .058 .009 .003 — DOSALANE-MONZONOSE. 255 ORDER 5. PERFELIC. GERMANARE—Continued. SUBRANG 2. DOPOTASSIC. CIMINOSE. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. or 42.8 ab 11.5 am 9. 7 ne 2.3 di 9.3 ol 12.4 mt 6.0 il 3.2 ap 1.7 Durbach, Schwarzwald, Baden. Not stated. A. Sauer, Mt. Bad. G. L-A., II, p. 25S, 1892. Durbachite. Q 1.0 or 46.1 ab 11.0 an 6.0 di 11.1 hy 15.6 mt 3.5 il 4.0 Monte Catini, n. Volterra, Tus¬ cany. H. S. Washing¬ ton. H. S. Washington, A. J. S., IX, p. 47, 1900. Mica-trachyte (selagite). or 52.3 ab 14.7 an 11.1 ne 7.7 di 6.0 ol 1.2 mt 5.6 Bagnorea, n. Orvieto, Italy. H. S. Washing¬ ton. H. S. Washington, J. G., V, p. 370, 1897. Leucite-phono- lite. or 37.8 ab 11.5 an 15.0 di 15.3 by 16.2 ol 1.8 mt 2.2 LaColonetta, Mte. Ci- mino, n. Viterbo, Italy. H. S. Washing¬ ton. H. S. Washington, A. J. S., IX, p. 44, 1900. Ciminite. or 39.5 ab 13.6 an 14.2 ne 0.9 di 15.3 ol 14.2 mt 1.9 Fontana Fiescoli, Mte. Cimino, n. Vi¬ terbo, Italy. H. S. Washing¬ ton. H. S. Washington, A. J. S., IX, p. 44, 1900. Ciminite. or 50.0 ab 12.6 an 15.0 ne 7.4 di 6.3 ol 3.1 mt 3.7 Mte. Venere, Mte. Vico, n. Viterbo, Italy. H. S. Washing¬ ton. H. S. Washington, V. G., IV, p. 849, 1896. Leucite- trachyte. SUBRANG 3. SODIPOTASSIC. MONZONOSE. F 0.04 Q 4.9 di 2.5 FeS., 0.32 or 24.5 hy 6.9 NiO trace ab 37.2 mt 3.2 an 15.0 il 2.9 ap 1.3 Q 8.4 di 1.3 or 28.4 hy 2.7 ab 40.3 mt 4.4 an 8.6 il 2.3 hm 2.0 SrO 0.10 Q 6.2 di 11.9 Li 2 0 trace or 26.7 hv 5.0 ab 36.7 mt 3.0 an 8.3 il !.! SrO 0.13 or 25.0 di 19.1 LioO trace ab 28.8 hy 9.9 an 11.1 mt 2.6 il 1.5 ap 1.3 Cro0 3 trace or 22.8 di 14.8 SrO 0.05 ab 23.6 hy 7.0 LioO trace an 14.2 ol 8.0 mt 3.9 il 1.1 ap 1.1 so 3 trace or 28.4 di 16.6 Cl 0.07 ab 23.1 ol 7.0 F trace an 12.0 mt 4.4 SrO 0.09 ne 4.0 il 1.2 LioO trace ap 1.8 so 3 0.23 Q 5.3 hy 4.6 Cl 0.32 or 37.8 mt 5.8 SrO trace ab 21.0 il 0.8 an 15.0 hm 0.8 so 3.9 ap 1.3 no 1.8 so 3 0.19 or 24.5 di 6.5 Cr 2 0 3 0.08 ab 25.2 hv 2.4 an 12 2 oi 20.6 mt 3.9 il 1.1 NiO 0.12 Q 1.4 di 0.4 or 32.2 hy 5.0 ab 37.2 mt 1.9 an 14.5 il 1.2 hm 3.0 ap 1.1 Mount Ascutney, V ermont. Elliott County, Kentucky. Yogo Peak, Little Belt Mountains, Montana. Yogo Peak, Little Belt Mountains, Montana. Sheep Creek, Little Belt Mountains, Montana. Beaver Creek, Bear- paw Mountains, Montana. Aspen Creek, Highwood Moun¬ tains, Montana. Cottonwood Creek, Montana. Stinkingwater River, Yellowstone Na¬ tional Park. W. F. Hille- brand. R. A. Daly, B. U. S. G. S., 148, p. 69, 1897. Diorite. T. M. Chatard. J. S. Diller, A. J. S., XXXII, p. 125, 1886. Syenite. Also in B. U. S. G. S., 38, p. 24, 1887. W. F. Hille- brand. Weed and Pirsson, A. J. S., L, p. 471, 1895. Syenite. Also in 20 A. R. U.S.G.S.,111, p. 473, 1900. W. F. Hille- brand. Weed and Pirsson, A. J. S., L, p. 473, 1895. Monzonite (yogoite). Also in 20 A. R. U.S.G.S.,III, p. 478, 1900. W. F. Hille- brand. L. V. Pirsson, 20 A. R. U. S. G. S., Ill, p. 531, 1900. Augite-minette. H. N. Stokes. Weed and Pirsson, A. J. S., I, p. 357, 1896. Monzonite. w --4 o o r~t- a> L. V. Pirsson, B. U. S. G. S., 148, p. 152, 1897. Trachyte. T. M. Chatard. G. P. Merrill, Pr. U. S. Nat. Mus., XVII, p. 670, 1895. Lamprophyre. W. H. Melville. J. P. Iddings, J. G., Ill, p. 947,1895. Quartz- banakite. 256 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS II. DOSALANE—Continued. . RANG 2. DOMALKALIC. MONZONASE—Continued. No. Si0 2 A1A 1 FeA FeO 1 MgO CaO Na 2 0 ; k 2 o H 2 0-j- H 2 0— co 2 Ti0 2 PA MnO BaO Sum Sp. gr. 10 52. 63 16. 87 4.52 3.11 3. 69 4. 77 3. 86 5.17 3. 65 0.81 0. 63 0.10 0. 29 100.10 Al. I .877 .164 .028 .043 .092 .086 .062 . 056 .010 .004 .001 .002 11 52. 33 18. 70 4.95 1.83 2.69 4. 71 4.51 5.45 2. 71 0. 74 0. 71 0. 81 0. 03 100. 31 Al. I .872 .183 .031 .025 .067 .084 .072 .059 .009 .005 — 12 Al. I 52.10 .868 16. 34 .160 3. 84 .024 6. 82 .095 4. 33 .108 4. 73 .084 4. 02 .065 4.20 .045 1. 74 0. 79 .010 0. 68 .005 trace 100.18 . 05 100.13 13 51. 82 16. 75 4.56 3. 36 4. 03 4. 94 3. 91 5.02 3.97 0.71 0. 52 0. 23 0. 26 100. 08 Al. I .864 .164 .029 .047 .101 .088 .063 .054 .009 .003 .003 .002 14 51.46 18.32 4.61 2. 71 2.91 6. 03 4.11 4. 48 3. 89 0. 83 0. 86 0.17 100. 38 A2. II .858 IS'" .029 .008 .073 .108 .066 .048 .010 .006 .002 15 59. 78 16. 86 3.08 3. 72 0. 69 2. 96 5.39 5.01 1.58 0. 75 0.14 99. 96 2. 689 A3. Ill .996 . 166 .020 . 051 .017 .053 .087 .054 .002 30° 16 59. 79 17.25 3. 60 1.59 1.24 3. 77 5. 04 5.05 0. 39 0.19 0. 72 0. 67 0. 35 0. 20 0.14 100.14 2. 704 Al. I .997 .169 .023 .022 .031 .068 .081 . 055 .008 .002 .003 . 001 25° 17 57. 48 '18. 04 5. 73 0. 73 1.17 5. 03 4. 28 4.15 0. 55 0. 62 1.00 0. 66 trace 0. 20 99. 98 Al. I .958 .176 .035 .010 .029 .089 .069 .044 .012 .005 — .001 18 57.48 14. 09 5.21 1.35 3. 49 6.05 3. 00 4. 69 1.37 1.20 0. 94 0. 65 0.09 0. 23 99. 92 Al. I .958 .138 .033 .019 .087 .108 .048 .050 .012 .005 .001 .002 19 57. 04 13. 66 4.96 1.77 4. 43 6.23 3. 08 4. 95 1.10 1.11 0. 94 0. 63 0.17 0. 22 100.36 Al. I .951 .134 .031 .025 .ill .Ill .050 .053 .012 .004 .002 .002 t 20 55. 35 12.91 4. 67 2.06 6. 29 5. 77 2. 65 4. 86 1.18 2. 67 0. 87 0. 58 0.08 0.19 99. 98 Al. I .923 .126 .029 .029 .157 .103 .043 .052 .oil .004 .001 .001 21 59.43 16. 68 2.54 3. 48 1.84 4. 09 3. 72 5. 04 0. 72 0. 27 1.38 0. 58 trace 0.14 100.04 2. 61 Al. I .991 .163 .015 .049 .046 .073 .059 .054 .017 .004 — .001 22 58.18 18. 46 2.31 3. 79 1.99 3.11 3. 70 6.58 0. 64 0. 68 0.41 ' 0. 29 100.14 2. 777 A2. II .970 .181 .014 .053 .050 .055 .060 .070 .008 .003 .002 23 52.00 18. 06 2.18 5.14 2. 84 4. 59 3. 78 4. 68 1. 84 3. 59 0. 98 0. 25 99. 93 A2. II .867 .176 .014 .071 .071 .082 .061 .050 .012 .004 24 58.00 16.91 3. 29 3. 74 1.96 3. 60 5.14 5.20 0.60 0. 85 0. 80 100. 09 A2. II . 967 .166 .021 .052 .049 .064 .083 .055 .011 .011 DOS ALAN E-MONZONOS E. 257 ORDER 5. PERFELIC. GERM AN A RE—Continued. SUBRANG 3. SODIPOTASSIC. MONZONOSE—Continued. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. or 31.1 ab 30.9 an 12.8 ne 0.9 di ol mt il ap 6.0 4.9 6.5 1.5 1.4 Hoodoo Mountain, Yellowstone Na¬ tional Park. L. G. Eakins. J. P. Iddings, J. G., Ill, p. 947, 1895. Banakite. NiO 0.14 or 32.8 ab 27.8 an 13.5 ne 5.4 di ol mt il lim ap 3.4 3.6 3.7 1.4 2.4 1.7 Stinkingwater River, Yellowstone Na¬ tional Park. W. H. Melville. J. P. Iddings, J. G-, III, p- 947, 1895. Banakite. so 3 Cl Li 2 0 0.22 0.24 0.13 Q 1.1 or 25.0 ab 22.0 an 16.7 so 3.3 no 2.1 di hy mt il ap 1.5 18.0 5.6 1.5 1.6 Indian Creek Lacco¬ lith, Yellowstone National Park. J. E. Whitfield. J. P. Iddings, M.U.S.G.S., XXXII, p. 83, 1899. Augite-a ndesite- porphyry. Same sheet as No. 8, kental- lenose. or 30.0 ab 28.3 an 13.1 ne 2.6 di ol mt il ap 7.0 5.6 6.7 1.4 1.1 Lamar River, Yellow- stone National Park. L. G. Eakins. J. P. Iddings, J. G., Ill, p. 947,1895. Banakite. or 26.7 ab 30.9 an 18.3 ne 2.0 di ol mt il ap 4.8 3.6 6.7 1.5 2.0 Ishawooa Canyon, Wyoming. L. G. Eakins. .T. P. Iddings, J. G., Ill, p. 947, 1895. Banakite. Q 1.4 or 30.0 ab 45. 6 an 7.0 di hy mt 6.7 2.4 4.6 Silver Cliff, Colorado. L. G. Eakins. W. Cross, Pr. Col. Sc. Soc., II, p. 240, 1887. Syenite. Also in 17 A. R. U.S. G.S.,11, p. 281, 1896. so 3 Cl SrO LioO 0.04 trace 0.11 trace Q 3.1 or 30.6 ab 42.4 an 9.5 di mt il hm ap 6.7 3.2 1.2 1.4 0.8 Near Tirbircio Gulch, La Plata Mountains, Colorado. H. N. Stokes. W. Cross, B. U. S. G.S., 168, p. 162, 1900. Syenite. ZrOo SO,' VoOg SrO 0.04 0.16 0.02 0.12 Q 6.8 or 24.5 ab 36.2 an 17.5 di hy il hm ap 2.3 1.8 1.5 5.7 1.6 Wicher Mountain, Pike’s Peak, Colorado. W. F. Hille- brand. W. Cross, B. U. S. G. S., 148, p. 163, 1897. ' Pyroxene- andesite? Complete in B. U.S.G.S.,168, p. 145, 1900. NiO SrO Li.>0 0.08 trace none Q 9.0 or 27.8 ab 25.2 an 11.1 di hy mt il hm ap 11.5 3.4 1.9 1.8 4.0 1.6 Santa Maria Basin, Arizona. W. F. Hille- brand. J. P. Iddings, B. Ph. Soc. Wash., XII, p, 212, 1892. Mica-basalt. Nearadamellose. Also in B. U. S. G. S., 148, p. 187, 1897. NiO SrO LioO 0.07 trace trace? Q 6.6 or 29.5 ab 26.2 an 9.2 di hy mt il hm ap 9.9 6.5 3.2 1.8 2.7 1.4 Santa Maria Basin, Arizona. W. F. Hille- brand. J. P. Iddings, B. Ph. Soc. Wash., XII, p. 212, 1892. Mica-basalt. Nearadamellose. Also in B. U. S. G. S., 148, p. 187, 1897. NiO SrO LioO 0.05 trace trace Q 4.4 or 28.9 ab 22.5 an 8.6 di hy mt il hm ap 13.0 9.7 4.4 1.7 1.6 1.4 Santa Maria Basin, Arizona. W. F. Hille- brand. J. P. Iddings, B. Ph. Soc. Wash., XII, p. 212, 1892. Mica-basalt. Nearadamellose. Also in B. U. S. G. S., 14s. p. 187, 1897. Zi0 2 SrO LioO 0.08 trace none Q 8.4 or 29.0 ab 30.9 an 13.9 di hy mt il ap 2.3 5.8 3.5 2.6 1.4 Dardanelle Flow, Tuolumne County, California. H. N. Stokes. F. L. Ransome, B. U. S. G. S., 89, p. 58, 1898. Augite-latite. Also in A. J. S. V., p. 363, 1898. Q 0.4 or 38.9 ab 31.4 an 14.2 hy mt il ap 9.1 3.2 1.2 1.0 Tito, Coquimbo, Chile. A. Lindner. F. v. Wolff, Z. D. G. G., LI, p. 531, 1899. Odinite. or 27.8 ab 30.4 an 18.1 ne 0.9 di ol mt il 3.9 8.1 3.2 1.8 Onston Ness, Orkney Islands. J. S. Flett. J. S. Flett, Tr. R. Soc. Edinb., XXXIX, pt. 4, p. 873, 1900. Bostonite. Not fresh. or 30.6 ab 43.0 •an 7.8 ne 0.3 di ol mt il 8.2 2.7 4.9 1.7 Tuft, Laugendal, Norway. V. Schmelck. W. C. Brogger, Eg. Kg., II, p. 33, 1895. Akerite. • 14128 No. 14 03 17 258 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS II. DOSALANE—Continued. RANG 2. DOMALKALIC. MONZOXASE—Continued. No. Si0 2 A1A Fe 2 0 3 FeO MgO CaO Na 2 0 k 2 o H,0+ O co 2 Ti0 2 FA MnO BaO Sum Sp. gr. 25 56. 23 17.22 2. 81 1.01 4. 85 1.79 4. 33 4. 81 4. 87 0.55 1.36 0.21 100. 26 2. 56 A2. II .937 .169 .017 .014 .121 .032 .069 .051 .016 .002 26 58.41 17.01 3. 44 2. 61 2. 95 4. 29 4. 39 4. 23 1.59 0.29 0. 98 0. 40 100. 70 2. 729 A2. 11 .974 .167 .022 .036 .074 .077 .071 .045 .012 .003 27 58. 40 16.81 3.47 2. 69 3. 90 1.54 4.48 5.03 2. 66 0. 48 0. 25 0. 43 100.14 2.642 A2. II .973 . 165 .022 .038 .098 .028 .072 .054 .003 .003 28 58. 40 15. 61 2. 72 2. 94 3.50 3. 97 3.13 5.37 1.72 2. 56 0. 38 0.40 100. 70 2. 674 A2. II .973 .153 .017 .041 .088 .071 .050 .058 .005 .003 \ 29 56. 29 15. 52 5. 28 0. 84 5.31 2.47 3.46 5. 26 3. 86 0. 95 trace 0.37 99. 77 2. 660 A2. II .938 .152 . 033 .011 .133 .045 .056 .057 — .003 30 54. 81 17.80 2.69 4. 46 5.03 1. 78 1.06 3. 86 3. 56 0. 44 0. 75 0.45 99. 69 2. 712 A2. II .914 .174 .017 .062 .126 .032 .065 .011 .009 .003 31 54. 64 17.13 6. 79 1.17 3.00 3. 28 4.43 6. 29 2. 00 1.47 0. 42 100. 75 2. 720 A2. II .911 .168 .042 .017 .075 .059 .071 .067 .018 .003 32 53. 92 16. 60 6. 87 0. 99 4. 26 3 54 3.22 7.45 2.15 1.08 0. 62 100.83 2. 709 A2. II .899 .163 .043 .014 .107 063 .051 .080 .013 .004 33 52.12 13. 52 2.56 4. 53 6.36 5. 78 2. 34 5.36 1.86 3. 59 1.20 0.92 100. 36 2. 726 A2. II .869 .132 .016 .062 .159 .103 .038 .058 .015 .006 34 59. 86 16. 68 2. 79 3. 00 3.51 3. 96 3.58 4.30 1.44 0. 75 99. 87 A3. Ill .998 .163 .017 .042 .088 .071 .058 .046 .009 35 58. 69 13.91 2. 41 3. 94 6.63 3.41 2.62 4.53 2. 69 0. 83 0. 30 99. 96 A2. II .978 .136 .015 .055 .166 .060 .042 .048 .010 .002 36 55. 35 16. 71 3.34 6.31 2. 04 3. 70 3.29 5.69 3. 26 trace trace 99.69 2. 74 A3. Ill .923 .164 .021 .088 .051 .066 .053 .061 — — 37 54.15 18. 25 3. 62 2. 09 2. 56 4. 89 4. 43 6.56 3. 69 trace 0. 41 100.65 2. 632 A3. Ill .903 .179 .023 .029 .064 .087 .071 .070 — .003 38 54. 20 15. 73 3. 67 5.40 3. 40 8.50 3. 07 4. 42 0. 50 0. 40 0. 50 0. 70 100. 50 A2. II .903 .154 .023 . 075 .085 .151 .050 .047 .005 .004 .010 39 59. 73 16.79 , 1.44 3.21 1.47 3. 27 4. 31 6. 09 3. 93 0.17 100. 31 A3. Ill .996 .164 .009 .044 .037 .059 .069 .065 .002 40 56. 75 18. 37 2. 22 3. 04 2. 02 4. 68 4. 85 5. 92 0. 18 1.24 trace 99.38 B2. Ill .946 .180 .014 .042 .051 .083 .078 .063 .015 — DOSALANE-MONZONOSE. 250 ORDER 5. PERFELIC. GERMANARE—Continued. SUBRANG 3. SODIPOTASSIC. MONZONOSE—Continued. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. S0 3 Org 0.15 0.07 Q 1.9 or 28.4 ab 36.2 an 8.9 C 1.7 !F hip 12.1 2.3 2.8 Namborner Miihle, Saar-Nahe Gebiet, Rh. Prussia. K. Gremse. K. A. Lossen, Jb. Pr. G. L-A., X, p. 290, 1892. Meso- keratophyr. Not fresh. S0 3 0.11 Q 5.0 or 25.0 ab 37.2 an 14.2 di hy mt il ap 3.6 6.0 5.1 1.8 1.0 Nahethal, Rh. Prus¬ sia. Hampe. H. Loretz, Jb. Pr. G. L-A., IX, p. 300, 1889. Porphyrite. S0 3 trace Q 2.8 or 30.0 ab 37.7 an 7.8 C 1.1 hy mt il 11.9 5.1 0.5 Ivreiseberg, Thiiring- erwald. G. F. Steffen. H. Loretz, Jb. Pr. G. L-A., IX, p. 300, 1889. Biotite- porphyrite. so 3 trace Q 6.1 or 32.2 ab 26.2 an 12.5 di hy mt il 5.9 8.2 3.9 0.8 Unter Neubrunn, Thiiringerwald. G. F. Steffen. H. Loretz, Jb. Pr. G. L-A., VIII, p. 108, 1888. Mica- porphvrite. Not fresh. so 3 0.16 Q 2.9 or 31.7 ab 29.3 an 10.8 hy mt hm ap 13.3 2.6 3.5 0.8 Gotteskopf, n. Ilmenau, Thuringia. K. Kliiss. H. Loretz, Jb. Pr. G. L-A., XIII, p. 135, 1893. Porphyrite. S0 3 for S. Not fresh. ' so 3 trace Q. 3.1 or 22.8 ab 34.1 an 8.9 C 3.7 hy mt il 17.3 3.9 1.4 Unter Neubrunn, Thiiringerwald. W. Hampe. H. Loretz, Jb. Pr. G. L-A., VIII, p. 105, 1888. Kersantite. Not fresh. so 3 0.13 or 37.3 ab 29.9 an 8.3 ne 4.0 di ol il hm 6.3 3.2 2.6 6.8 Langewiesen, n. Ilmenau, Thuringia. Fischer. H. Loretz, Jb. Pr. G. L-A., XIII, p. 135, 1893. Porphyrite. S0 3 for S. so 3 0.13 or 44.5 ab 19. 9 an 8.9 ne 3.7 di ol il hm ap 6.7 5.3 2.1 6.9 1.4 Langewiesen, n. Ilmenau, Thuringia. Hesse. H. Loretz, Jb. Pr. G. L-A., XIII, p. 135, 1893. Porphyrite. S0 3 for S. so 3 0.22 Q 0.2 or 32.2 ab 20.0 an 10.0 di hy mt il ap 10.3 14.0 3.7 2.3 2.0 Unter Neubrunn, Thiiringerwald. G. F. Steffen. H. Loretz, Jb. Pr. G. L-A., VIII, p. 105, 1888. Kersantite. S0 3 for S. Not fresh. Q 8.4 or 25.6 ab 30.4 an 16.4 di hy mt il 2.6 9.6 3.9 1.4 Farrenkopf, Schwarzwald, Baden. M. Dittrich. A. Sauer, G. Sp. Kt. Baden, Bl. Horn berg, p. 27, 1897. Syenite. Q 8.2 or 26.7 ab 22.0 an 12.8 di 3.1 hy 19.0 mt 3.5 il 1.5 Frohnau, Schwarzwald, Baden. M. Dittrich. A. Sauer, G. Sp. Kt. Baden, Bl. Hornberg, p. 27, 1897. Mica-syenite. Q 0.3 or 33.9 ab 27.8 an 13.9 di 3.8 hy 12.1 mt 4.9 Neudeck, Silesia. H. Traube. H. Traube, N. J., 1890, I, p. 225. Mica-syenite. or 38.9 ab 20.4 an 10.6 ne 9.1 di ol mt 10.9 1.5 5.2 Miihlorzen, n. Gaute, Bohemia. R. Pfohl. J. E. Hibsch, T. M. P. M., XVII, p. 87, 1897. Gauteite. Not fresh. or 26.1 ab 26.2 an 15.8 di hy ol mt il ap 18.4 3.3 2.8 5.3 0.8 1.3 Monzoni, Tyrol. Y. Schmelck. W. C. Brbgger, Eg. Kg., II, p. 24, 1895. Monzoni te. P 2 0 5 approxi¬ mate. Q 1.9 or 36.1 ab 36.2 an 8.3 di hy mt 6.8 5.0 2.1 Mte. Amiata, Tuscany. L. Ricciardi. A. Verri, B. Soc. G. It., VIII, p. 408, 1899. Trachyte. Cl 0.11 or 35.0 ab 30.9 an 10.8 ne 5.4 di ol mt il 10.0 1.4 3.2 2.3 L’Arso, Ischia, Italy. H. S. Washing¬ ton. H. S. Washington, A. J. S., VIII, p. 290, 1899. Trachyte (ciminite). Dried at 110°. Sum low. 260 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS II. DOSALANE—Continued. RANG 2. DOMALKALIC. MONZON-isE—Continued. No. Si0 2 A1A Fe 2 0 3 FeO MgO CaO Na.,0 K.,0 h 2 o+ H,0- o O TiO a PA MnO BaO Sum Sp. gr. 1 46. 77 14. 91 7. 80 4. 90 2. 94 6. 30 4. 97 2. 37 4.28 0. 92 trace 2. 31 0.98 0. 29 0. 04 99.90 Al. I .780 .146 .049 .068 .074 .112 .080 .025 .028 .007 .004 — 2 59. 27 15. 76 2. 07 3. 57 3.04 3. 69 5. 63 3. 33 0. 74 0. 23 0. 30 1.12 0. 42 0.37 trace? 100.10 . 19 Al. I .988 .155 .013 .050 .076 .066 .091 .035 .014 .003 .005 — 99.91 3 56. 53 16. 47 1.58 5. 40 2.67 4. 90 5.59 3. 80 0. 60 0. 23 0. 05 1.40 0. 27 0. 20 trace 99. 98 .09 Al. I .942 .161 .010 .075 .067 .088 .090 .040 .017 .002 .003 — 99.89 4 56. 51 16. 59 1.35 6. 59 2. 52 4. 96 5.15 3.05 0. 71 0.21 0. 33 1.20 0.41 0.24 0. 03 100. 26 . 11 Al. I .942 .163 .008 .092 .063 .089 .083 .032 .015 .003 .003 — 100.15 5 56. 01 15. 19 2. 34 4. 89 4. 67 4. 85 5.66 2.16 0. 90 0.36 1.13 0.53 0.40 trace? 99.21 Al. I .934 .149 .016 .068 .117 .087 .091 .023 .014 .004 .006 — 6 55. 28 17.23 1.54 6.23 2. 69 5.60 5.42 2.10 0. 71 0. 20 0. 04 1.64 0. 73 0. 24 0.06 100.15 . 13 Al. I .921 .169 .010 .087 .067 .100 .087 .023 .020 .005 .003 — 100.02 7 61. 87 17. 26 2. 35 2. 43 1.82 3.23 5.18 3. 83 1.07 0. 87 0.03 99.94 2.67 A2. II 1.036 .169 .015 .034 .046 . 058 .083 .041 .011 — 8 61.08 16. 62 2. 87 2. 56 1.65 3.66 4. 75 3.90 0. 97 0. 44 0. 73 0. 63 trace 0. 32 100. 26 Al. I 1.018 .163 .018 .036 .041 .065 .077 .041 .009 .005 '- .002 9 58. 28 17.89 3. 20 1.73 1.51 3. 69 5. 89 5. 34 0. 98 0.17 0. 68 0. 26 0. 06 0.36 100. 05 Al. I .971 .175 .020 .024 .038 .066 .095 .057 .oos .002 .001 .003 10 56. 75 16. 40 4. 78 3.10 3. 22 5. 34 4.19 3. 36 0. 82 0. 40 0. 86 0.52 0.17 0. 33 100. 34 Al. I .946 .161 .030 .043 .081 .095 .068 .036 .011 .004 .002 .002 11 54. 69 16. 53 4.54 / 2. 83 2. 99 5.34 5.19 3. 93 1.05 0. 32 0. 83 0.91 0. 73 0. 07 0. 37 100. 38 Al. I .912 .162 .028 .040 . 075 .095 .084 .042 .011 . 005 .001 .003 12 52. 47 18.23 3. 31 3. 85 2. 85 4.56' 4. 83 3.81 2. 03 0. 68 1.01 0. 97 0. 64 0.15 0. 23 99.82 Al. I .876 .179 ..020 .054 .071 .081 .077 .040 .012 .005 .002 .002 13 57. 01 18.41 3.69 2. 36 2. 34 4.29 4. 95 3. 72 2. 29 0.27 0. 42 0.21 99. 96 A2. II . 950 .180 .023 .033 .059 .077 .080 .040 .003 .003 .003 • 14 53. 80 20.13 3. 57 2. 63 2. 26 5.60 5. 20 4. 49 0. 90 0.43 0. 56 0. 29 99.86 A2. 11 .897 .197 .022 .036 .047 .100 .084 .048 .005 .004 .004 15 60. 44 16. 65 2. 31 3. 09 2.18 4.22 5.18 2. 71 1.07 0. 36 0. 48 0. 60 0. 29 0. 13 0.12 99.96 2.677 Al. I 1.007 .163 .014 .043 .055 .075 .084 .029 .008 .002 .002 .001 24° DOSALANE-AKEROSE. 261 ORDER 5. PERFELIC. GERMANARE—Continued. SUBRANG 4. DOSODIC. AKEROSE. Inclusive. Norm. ZrO 2 none or 13.9 di 10.8 FeSo 0.07 ab 36.2 Oi 1.7 Cr.)0 3 none an 11.4 mt 11.4 Vo0 3 0.02 ne 3.1 il 4.3 SrO 0.03 ap 2.2 LUO trace ZrOo 0.04 Q 2.8 di 6.0 Cl 0.03 or 19.5 hy 7.8 F 0.42 ab 47.7 mt 3.0 FeSj 0.07 an 8.1 il 2.0 NiO trace ap 1.0 ZrOo 0.03 or 22.2 di 13.2 Cl 0.07 ab 42.4 ol 3.7 F 0.19 an 8.6 mt 2.3 FeS» trace ne 2.6 il 2.6 NiO trace ZrO, 0.04 or 17.8 di 6.8 Cl 0.07 ab 43.5 by 10.9 F 0.24 an 13.3 ol 0.8 FeS 2 0.06 mt 1.9 NiO trace? il 2.3 ap 1.1 FeS.> 0.09 or 12.8 di 8.8 NiO 0.03 ab 47.7 hy 9.4 an 9.7 ol 2.4 mt 3.7 il 2.0 ap 1.3 Zr0 2 trace Q 0.2 di 7.7 S0 3 none or 12.8 by 10.5 Cl 0.07 ab 45.6 mt 2.3 F 0.28 an 13.9 il 3.1 FeS» 0.07 ap 1.7 NiO ? Q 8.1 di 3.0 or 22.8 hy 4.3 ab 43.5 mt 3.5 an 12.5 il 1.7 SrO 0. 08 Q 10.0 di 1.1 LUO trace or 22.8 hy 4.9 ab 40.3 mt 4.2 an 12.5 il 1.4 ap 1.5 SrO 0.05 or 31.7 di 8.0 LUO trace ab 41.9 mt 4.6 an 6.4 il 1.2 ne 4.3 ap 0.7 SrO 0.10 Q 6.1 di 4.9 LiigO trace or 20.0 hy 6.2 ab 35.6 mt 7.0 an 15.8 il 1. 5 ap 1.3 Cl trace or 23.4 di 9.0 SrO 0.06 ab 41.9 ol 2.4 LUO trace an 10.0 mt 6.5 ne 1.1 il 1.7 ap 1.8 ZrOo 0.02 or 22. 2 di 1.2 FeS, 0.04 ab 39.8 ol 7.5 Cr 2 0 3 trace an 17.2 mt 4.6 V2O3 0.03 ne 0.3 il 1.8 NiO trace ap 1.4 SrO 0.11 Q 2.2 di 1.7 or 22.2 hy 5.9 ab 41.9 mt 5.3 an 16.7 il 0.5 ap 1.0 or 26.7 di 4.5 ab 33.0 ol 2.6 an 18.1 mt 5.1 ne 6.0 il 0.8 ap 1.4 S trace Q 7.7 di 5.7 V 2 0 3 0.02 or 16. 1 hy 5.5 NiO none ab 44.0 mt 3.2 SrO 0.11 an 13.9 il 1.2 Li 2 0 trace Locality. Analyst. Reference. Author’s name. Remarks. Mapleton Tpwnship, Aroostook County, Maine. W. F. Hille- brand. H. E. Gregory, B. U. S. G. S., 165, p. 183, 1900. Teschenite. Not fresh. Mount Ascutney, Vermont. IV. F. Hille- brand. R. A. Daly, B. U. S. G. S., 148, p. 68, 1897. Segregation in granite. Mount Ascutney, Vermont. W. F. Hille- brand. R. A. Daly, B. U. S. G. S., 148, p. 69, 1897. Segregation in granite- porphyry. Mount Ascutney, V ermont. IV. F. Hille- brand. R. A. Daly, B. U. S. G. S., 148, p. 68, 1897. Segregation in syenite. Mount Ascutney, Vermont. IV. F. Hille- brand. R. A. Daly, B. U. S. G. S., 148, p. 68, 1897. Segregation in granitite. Sum low. Mount Ascutney, Vermont. IV. F. Hille- brand. R. A. Daly, B. U. S. G. S., 148, p. 70, 1897. Segregation in diorite. Cottonwood Creek, Castle Mountains, Montana. L. V. Pirsson. Weed & Pirsson, B. U. S. G. S., 139, p. 88, 1896. Dioritic syenite. Inclusion in granite. Near laurvikose. Three Peaks, Crazy Mountains, Montana. IV. F. Hille- brand. J. E. Wolff, B. U. S. G. S., 148, p. 142, 1897. Porphyrite. Nearlaurvikose. Shield’s River Basin, Crazy Mountains, Montana. IV. F. Hille- brand. J. E. Wolff, B. U. S. G. S., 148, p. 143, 1897. Syenite. Near monzon- ose Shield’s River Basin, Crazy Mountains, Montana. IV. F. Hille- brand. J. E. Wolff, B. U. S. G. S., 148, p. 143, 1897. Porphyrite. North Part of Crazy Mountains, Montana. IV. F. Hille- brand. J. E. Wolff, B. U. S. G. S., 148, p. 143, 1897. Porphyrite. Dike Mountain, Yellowstone National Park. IV. F. Hille- brand. Hague and Jaggar, B. U. S. G. S., 168, p. 98, 1900. Trachyte- andesite. Lookout Mountain, Silver Cliff, Colo¬ rado. L. G. Eakins. IV. Cross, 17 A. R. U. S. G. S., II, p. 231, 1896. Andesite. Mount Fairvew, Rosita Hills, Colorado. L. G. Eakins. IV. Cross, 17 A. R. U. S. G. S., II, p. 324, 1896. Augite-diorite. La Plata Mountains, Colorado. IV. F. Hille- brand. IV. Cross, B. U. S. G. S., 148, p. 181, 1897. Diorite- porphyry. Complete in B. U.S.G.S. 168, p.162,1900. 262 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS II. DOSALANE—Continued. RANG 2. DOMALKALIC. MONZONASE—Continued. No. Si0. 2 A1A Fe 2 0 3 FeO MgO CaO Na 2 0 K 2 0 h 2 o+ H 2 0- co 2 Ti0 2 PA MnO BaO Sum Sp.gr. 16 55. 53 16. 78 4. 06 3.35 3. 00 6.’96 4.31 3. 57 0. 55 0.09 0. 09 0. 95 0. 47 0.16 0.13 100.17 2. 79 Al. I .926 .164 .025 .047 .075 .125 .069 .038 .012 .003 .002 .001 21 ° 17 54. 34 19. 23 3.19 2.11 1.28 4. 53 6. 38 5.14 1.17 0.14 1.09 0.27 0. 08 0. 24 99. 77 ’2.68 Al. I ' .906 .189 .020 .030 .032 .081 .103 .055 .013 .002 .001 .002 18 49.84 17. 78 5.86 2. 62 3.02 7.35 5. 20 3. 04 2. 02 0.34 0. 52 1.43 0. 76 0.21 0.22 100. 42 Al. I .831 .174 .037 .036 . 076 .131 .084 .032 .017 .005 .003 .002 19 61.26 16.15 4.39 2. 66 2.91 5. 75 4. 93 2. 65 0.15 100. 85 B3. IV 1.021 .158 .027 .037 .073 .102 .079 .028 20 60. 09 19. 04 3.14 1.89 4. 20 2.91 5.26 2. 95 0. 98 100. 46 A3. Ill 1.002 .186 A .020 .027 .105 .051 .085 .032 21 59.54 13.04 4. 74 6.13 1.33 3.81 5.88 3. 86 0. 68 0.18 0. 59 0. 49 100. 32 A3. Ill .992 .128 .029 .085 .033 .068 .095 .041 .004 .007 22 59.06 16. 79 3.47 4.81 3. 00 5.22 4. 60 2. 79 0. 95 100. 69 A3. Ill .984 .164 .022 .067 .075 .093 0. 74 .030 23 59. 56 17. 60 2. 90 3. 38 1.87 3. 67 4. 88 4.40 1.37 1 99 0. 03 101. 32 2. 729 C2. IV .976 .173 .018 .047 .047 .066 .079 .047 .015 — 24 58. 48 19.24 5. 75 n. d. 0.99 5.02 5. 52 3. 06 0. 47 0. 96 trace 99. 41 B4. V .975 .189 .036 (.072) .025 .090 .087 .033 .012 — 25 51. 22 17.56 3.51 4. 34 3. 22 4.52 5. 72 4. 37 1.93 0.60 1.70 1.08 0. 20 99.97 A2. II .854 .172 .022 .060 .081 .081 .092 .046 .021 • .008 .003 26 55.17 13. 49 3.10 3.55 8. 55 3.15 4.43 1.09 4. 27 3.27 0.39 100. 46 A3. Ill . 920 .132 .020 .050 .214 . 056 .071 .012 .006 27 53.12 20. 48 5.13 1.50 1.88 4. 29 6. 20 4. 88 2.25 0. 25 0. 43 100.59 2. 674 A2. II .885 .201 .032 .021 .047 . 076 .100 .052 .003 .003 28 60. 22 16. 96 6. 34 0. 80 1.05 3.19 5. 53 4.32 1.53 trace 0. 44 100. 45 2.662 A2. II 1.004 .166 .039 .011 .026 . 057 .089 .046 .003 29 58. 04 16. 78 5.13 3.63 2. 62 4.52 5.41 4.14 0.57 trace 100. 84 A3. Ill .967 .164 .031 .050 .066 .080 .987 .044 — 30 57. 90 16.01 5. 82 4.21 2.34 5.11 4. 46 3. 73 0. 98 • trace 100. 56 A3. Ill .965 . 157 .036 .058 .059 .091 .072 .039 31 53.60 14.43 1.62 8. 70 0. 41 8.00 5.61 2.03 2. 02 0.52 1.98 0.16 100.16 A2. II. .893 .141 .010 .121 .010 .143 .090 .021 .025 .001 32 53. 26 16. 63 8. 29 3.21 1.10 7.30 5. 31 3. 54 1.43 0. 31 100.38 2. 671 A3. Ill .888 .163 .052 .044 .028 .130 .085 .037 .004 DOSALANE-AKEROSE. 203 ORDER 5. PERFELIC. GERMANARE—Continued. SUBRANG 4. DOSODIC. AKEROSE—Continued. Inclusive. Norm. FeS- 0.04 Q 1.6 di 12.9 Vo0 3 0.02 or 21.1 hy 2.7 NiO trace ab 36.2 mt 5.8 SrO 0.11 an 15.8 il 1.8 Li.>0 trace ap 1.1 ZrOo 0.07 or 30.6 di 6.9 so 3 0.07 ab 34.1 WO 1.3 Cl 0.28 an 9.2 mt 4.6 VoOg 0.02 ne 6.0 il 2.0 SrO 0.16 so 3.9 ap 0.7 LioO trace ZrO, 0.02 or 17.8 di 12.0 so 3 none ab 30.4 ol 1.4 Cl trace an 16.1 mt 4.4 v,, 0 :i 0.03 ne 7.4 il 2 . 6 SrO 0.18 ap 1.8 Li 2 0 trace . Q 8.6 di 11.3 or 15.6 by 3.2 ab 41.4 mt 6 . 3 an 14.2 Q 5.2 hy 11.4 or 17.8 mt 4.6 ab 44.5 an 14.2 c 1.8 Q 1.7 ac 3.7 or 22.8 di 13.3 ab 45.6 hv 6.3 mt 4.9 ap 1.4 Q 1.6 di 19.9 or 16.7 hy 2.9 ab 38.8 mt 5.1 an 16.7 Q 2.8 di 4.5 or 26.1 hy 4.4 ab 41.4 mt 4.2 an 13.1 il 2.3 Q 0.7 di 5.0 or 18.3 hv 7.9 ab 45.6 il 1.8 an 19.2 or 25.6 di 5.3 ab 32.0 ol 5.6 an 9.5 mt 5.1 ne 8.8 il 3.2 ap 2.5 Q 4.4 di 1.5 or 6.7 hy 24.6 ab 37.2 mt 4.6 . an 13.6 so 3 0.14 or 28.9 di 2.0 Cl 0.28 ab 32.5 ol 2.6 an 15.0 mt 4.2 ne 8.8 il 0.5 hm 2.2 ap 1.0 so 3 0.07 Q 5.4 di 3.4 or 25.6 hy 1.0 ab 46.6 mt 2.6 an 8.6 hm 4.5 ap 1.0 Cl trace or 24.5 di 10.6 ab 45.6 hy 0.4 an 9.2 ol 2.4 mt 7.2 Q 4.9 di 10.2 or 21.7 hy 3.9 ab 37.7 mt 8.4 an 12.8 so 3 0.15 or 11.7 di 23.8 X 0.93 ab 41.4 WO 1.9 an 8.3 mt 2.3 ne 3.1 il 3.7 or 20.6 di 6.1 ab 38.8 wo 7.2 an 11.4 mt 9.3 n e 3.1 il 0.6 hm 1.9 Locality. Analyst. La Plata Mountains, W. F. Hille- Colorado. brand. 'Longfellow Mine, Cripple Creek,Colo¬ rado. Bull Cliff, Cripple Creek, Colorado. VV. F. Hille- brand. W. F. Hille- brand. Lava of 1869, Pasta j R. Ktich. Volcano, Colombia. Misti Volcano, Are- F. H. Hatch, quipa, Peru. Tamaya, Chile. C. Schwarz. Cuesta del Cuzco, San B. Wetzig. Antonio Valley, Ar¬ gentina. Vettakollen, n. Chris¬ tiania, Norway. Bananas, Christiania Region, Norway. Brathagen, Laugen? dal, Norway. Vera, Cabo de Gata, Spain. Bauza, Columbretes Islands, Spain. Wambacher Hof, Pfalz, Germany. Bruder Kunzberg, n. Honnef, Siebenge- birge. Bruder Kunzberg, n. Honnef, Siebenge- birge. Gottsbiiren, Reinhardswald, Rh. Prussia. Kauling-Beil stein, n. Kreuzberg, Rhongebirge. P. Jannasch. R. Mauzelius. V. Schmelck. A. Osann. R. Pfohl. K. Kltiss. W. Bruhns. W. Bruhns. P. Jannasch. E. v. Seyfried. Reference. Author’s name. W. Cross, B. U. S. G. S., 148, p. 181, 1897. Diorite. W. Cross, 16 A. R. IT. S. G. S., II, p. 45, 1895. Nephelite- syenite. W. Cross, B. U. S. G. S., 148, p. 162,1897. Local facies of phonolite. R. Kiich, G. Stud. Colomb.. I, p. 141,1892. Pyroxene- andesite. F. H. Hatch, T. M. P. M., VII, p. 328, 1886. Pyroxene- andesite. A. v. Groddeck, Z. D. G. G., XXXIX, p. 251, 1887. Porphyrite. A. Stelzner, Btr. G. Arg. Rep., I, p. 212, 1885. Andendiorite. H. O. Lang, Nyt Mag., XXX, p.40, 1884. Syenite. (Akerite,W. C. B.) W. C. Brogger, Z. K., XVI, p. 46, 1890. Akerite. W. C. Brogger, Eg. Kg., Ill, p. 130, 1899. Soda-minette. A. Osann, Z. D. G. G., XLI, p. 311, 1889. Verite. F. Becke, T. M. P. M., XVI, p. 168, 1896. Trachyte. A. Leppla, Jb. Pr. G. L-A., XIV, p. 139, 1894. Porphyrite. W. Bruhns, Vh. Nh. Ver. Bonn., LIII, p. 48, 1896. Trachyte. W. Bruhns, Vh. Nh. Ver. Bonn., LIII, p. 48, 1896. Trachyte. F. Rinne, Jb. Pr.G.L-A., XIII, p. 98*, 1893. Basalt. E. v. Seyfried, c.f. N. J., 1898, II, p. 61. Tephrite. Remarks. Complete in B. U.S.G.S. 168, p.162,1900. Near essexose. “Silicified.” Also in W. C. Brogger, Z.K., XVI, p. 50, 1890. Not fresh. S0 3 and Cl from sea water. Iron oxides? Nearlaurvikose. Light colored. Dark colored. MgO low? CHEMICAL ANALYSES OF IGNEOUS ROCKS 264 CLASS II. DOSALANE—Continued. RANG 2. DOMALKALIC. MONZONASE—Continued. 1 52. 59 15. 93 6.12 3.96 5. 04 5.55 5. 79 0. 67 2.16 0.16 none 1.36 0.15 0. 25 99. 73 A2. II .877 .156 .038 .055 .126 .099 .093 .007 .017 .001 .004 ! 2 56. 51 14. 07 4. 04 4. 65 3. 95 8. 44 5.32 0. 79 1.51 none 0.19 0. 23 trace 99. 70 ! A2. II .942 .138 .025 .065 .099 .150 .085 .008 .002 .002 — 3 57. 76 18. 64 3. 88 0.18 1.79 6. 56 7.44 1.52 1.08 0. 08 1.06 99.99 2.684 A2. II .963 .183 .024 .003 .045 .117 .120 .016 .001 .015 4 54. 23 15.22 2.84 9. 47 2. 93 8.56 5.80 0. 92 1.00 100.97 B3. IV .904 .149 .017 .133 .072 .152 .093 .010 ] RANG 3. ALKALICALCIC. ANDASE. 1 A2. II 50. 81 .847 15.13 .148 2. 40 .015 3. 52 .049 10.64 .266 4. 96 .088 1.01 .016 7.01 .074 3.07 1.71 .021 0. 62 .004 100 . 88 trace trace DOSALANE-SR 2 OF ANDASE. 265 ORDER 5. PERFELIC. GERM AN ARE—Continued. SUBRANG 4. DOSOOIC. AKEROSE—Continued. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. S0 3 0.08 Q 5.5 or 19.6 ab 32.0 an 15.3 C 1.9 hy 14.6 mt 3.2 il 2.2 Pfeffelbach, St. Wend el, Harz Mountains. Fischer. K. A. Lossen, Jb. Pr. G. L-A., X, p. 316, 1892. Porphyrite. Not fresh. S0 3 Org 0.10 0.09 Q 1.0 or 11.1 ab 36.7 an 14.2 C 3.0 hy mt il 22.7 2.8 2.2 Pfeffelbach, n. St. Wendel, Harz Mountains. Hesse. K. A. Lossen, Jb. Pr. G. L-A., X, p. 316, 1892. Diabase? S0 3 for S. Not fresh. Near andose. so 3 trace Q. 3.3 or 18.9 ab 34.6 an 14.5 di hy mt il 3.2 16.4 4.2 0.9 W iistewaltersdorf, Silesia. A. Steffen. E. Dathe, Z.D.G.G., XXXVII, p. 1035, 1885. Kersantite. Not fresh. so 3 Cl none trace Q 0.4 or 23.4 ab 38.3 an 17.5 di hy mt hm ap 8.8 1.2 4.2 3.0 1.5 Kolme Scheibe, Bohemia. R. Pfohl. J. E. Hibsch, T. M. P. M., XV, p. 258, 1896. Hauyne- tephrite. No S0 3 or Cl? Probably does not belong here. or 21.1 ab 27.8 an 20.0 ne 9.1 di ol mt 14.1 1.9 5.6 Beresowska, Perm, Russia. Loewinson-Les- sing. Loewinson-Lessing, G. Sk. Jushno-Sao., p. 244, 1900. Syenite-diorite. Q 7.7 or 22.2 ab 44.5 an 7.8 di mt il ap 8.8 6.0 0.8 1.0 Kedabeg, Karabagh Distr., Transcaucasus. A. Rohrig. C. R. Thost, Abh. Senkb. N. Ges., XVIII, p. 221, 1894. Augite-granite. Not fresh. so 3 s CuO 0.05 0.05 0.10 Q 3.6 or 16.7 ab 51.4 an 13.9 hy mt il hm ap 4.0 1.2 3.5 4.0 1.6 Kohala Mountain, Waimea, Hawaii. A. B. Lyons. A. B. Lyons, A. J. S. II, p. 424, 1896. Andesite. Calc, to 100 per cent after de¬ ducting H 2 0 H 2 0-f 0.83 H 2 0 — 0.53. SUBRANG 5. PERSODIC. or 3.9 ab 48.7 an 15.6 di hy ol mt il 9.3 7.5 0.5 8.8 2.6 Crystal Falls, Michi¬ gan. H. N. Stokes. J. M. Clements, M. U. S. G. S., XXXVI, p. 106,1899. Meta-basalt. S trace Q 3.0 or 4.4 ab 44.5 an 12.5 di hy mt 23.7 3.7 5.8 Grenada, West Indies. J. B. Harrison. J. B. Harrison, Rocks of Grenada, London, 1896, p. 10. Augite-enstatite- an desite. Average sam pie. or 8.9 ab 55.0 an 13.1 ne 4.3 di wo mt hm 9.7 2.9 1.4 3.3 Lindenberg, Hesse. F. W. Schmidt. C. Chelius, Erl. G. Kt. Hesse, I. Bl. Rossdorf, p. 54, 1886. Syenite. Calc, to 100? or 5.6 ab 40.9 an 12.8 ne 4.3 di ol mt 24.8 7.5 3.9 Victoria Range, West- land, New Zealand. W. A. MacLeod. W. A. MacLeod, Tr.N. Z. Inst., XXXI, p.487, 1899. Dolerite. Sum high. SUBRANG 2. DOPOTASSIC. Cl trace or 41.4 di 3.9 Plauensche Grund, B. Doss. B. Doss, Augite-minette. ab 8.4 hy 5.4 an 16.1 ol 14.7 Dresden, Saxony. T. M. P. M., XI, mt 3.5 p. 27, 1890. il 3.2 ap 1.4 266 CHEMICAL ANALYSES OF IGNEOUS KOCKS CLASS II. DOSALANE—Continued. RANG 3. ALKaLICALCIO. ANDASE. No. Si0 2 A1A Fe 2 0 3 FeO MgO CaO Na 2 0 k 2 o h 2 o+ h 2 o- O o Ti0 2 PA MnO BaO Sum Sp. gr. 1 58. 51 16. 32 2.11 4. 43 3. 73 3. 92 3.11 4.08 2.00 0. 23 none 0. 72 0. 30 trace 99. 46 All . 975 .160 .013 .061 .093 .070 .050 .043 .009 .002 — 2 57.97 15. 65 0. 73 2. 80 4. 96 10.93 3. 03 3.16 0. 38 0. 22 0.60 0.15 trace 0.09 100.69 Al. I .966 .152 .005 .039 .124 .195 .049 .034 .007 .001 .001 3 51.00 17.21 4. 23 2. 41 6.19 9.15 2.88 4.93 0. 63 0.13 0. 33 trace 0. 34 99.60 Al. I .850 .169 .026 .033 .155 .163 .047 .053 .002 .002 — .002 4 52.33 15.09 4.31 4.03 6. 73 7.06 3.14 3. 76 2.68 0.14 1.02 0. 09 0. 07 100. 45 2. 785 Al. I .872 .148 .027 . 056 .168 .126 .051 .040 .002 .007 .001 .001 5 54. 97 18. 38 3. 06 4. 22 2. 38 5.43 3. 45 3. 37 0. 82 2.92 0.97 0.42 trace 100. 45 Al. I .916 .180 .020 . 05S .060 .097 .056 .036 .012 .003 — 6 56. 05 19. 70 3. 74 2. 32 2.51 4. 34 3. 29 4. 44 1.86 0. 98 0. 66 trace 100.14 Al. I .934 .193 .023 .032 . 063 .077 .053 .047 .012 .005 1 7 54. 86 17. 28 4.08 2.28 4.19 5. 42 3. 94 3. 96 2.16 0. 69 0. 48 0.19 0.37 99.90 Al. I .914 .169 .025 .032 .105 .096 .063 .042 .009 .003 .003 .003 8 53. 49 17.19 4. 73 3.25 4. 42. 6. 34 3. 23 3.86 2.17 0.71 0.43 0.14 0.06 100. 02 Al. I .892 .169 .029 .045 .ill .113 .052 .041 .009 .003 .002 — 9 52. 93 19. 67 3. 07 3. 50 2. 88 4. 69 4. 20 4. 75 2. 73 • 0. 72 0. 59 0.15 0. 21 100. 09 Al. I .882 .193 .020 .049 .072 .084 .068 .051 .009 .004 .002 .002 10 52. 86 17.51 5.18 3. 31 4.18 6. 51 3. 22 3.41 1.76 1.04 0.53 trace 99. 93 Al. I .881 .174 .032 .046 .105 .116 .051 .036 .012 .003 11 52. 49 17.89 5. 76 2.08 3. 49 7.01 3.18 3. 73 2. 63 0. 81 0.55 0. 09 0. 30 100. 01 Al. I . 875 . 175 .036 .030 .087 .125 .051 .039 .010 .004 .001 .002 12 52.11 16. 58 3. 66 4. 99 6. 87 6. 43 3.25 3. 20 1.99 0. 53 0. 63 0. 23 100. 47 A2. II .869 .163 .023 .070 .172 .115 .052 .034 .006 .004 .003 13 51.75 17.48 6. 42 1.46 4.05 8. 20 3.33 3. 72 2.26 * 0. 86 0. 67 trace 100. 37 Al. I .863 .172 .040 .020 '.101 .146 .054 .039 .011 .005 — 14 51.56 21.00 5.17 2. 76 2. 52 4. 83 4.37 4.13 2. 27 0. 65 0. 69 trace 100. 29 Al. I .859 .206 .032 .039 .063 .086 .071 .044 .008 .005 — 15 51.17 16.14 4. 11 4. 48 4. 82 7. 72 2.99 3.54 2.24 0. 63 none 1.01 0. 48 0. 21 0. 20 99. 94 Al. I .853 .158 .025 .062 .121 .137 .048 .037 .012 .003 .003 .001 DOSALANE—SHOSHONOSE. 267 ORDER 5. PERFELIC. GERMANARE—Continued. SUBRANG 3. SODIPOTASSIC. SHOSHONOSE. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. Cr»O s NiO none none Q 9.0 or 23.9 ab 26.2 an 18.6 di 0.8 hy 14.0 mt 3.0 il 1.4 Crystal Falls, Mich¬ igan. H. N. Stokes. J. M. Clements, J.G., VI, p. 378,1898. Mica-diorite. Also in M. U. S. G.S..XXXVI, p. 231, 1899. Cl F SrO Li,0 trace trace 0.02 trace Q 3.1 or 18.9 ab 25.7 an 19.5 di hy mt il 27.8 2.7 1.2 1.1 Rock Creek, Crazy Mts., Montana. W. F. Hille- brand. J. E. Wolff, B. U. S. G. S., 148, p. 144, 1897. Diorite. S0 3 Cl SrO 0.03 trace 0.14 or 29.5 ab 11.5 an 19.2 ne 7.7 di ol mt ap 18.8 5.4 6.0 0.7 Highwood Peak, High wood Mts., Montana. E. B. Hurlbut. L. V. Pirsson, B. U. S. G. S., 148, p. 154, 1897. Monzonite. or 22.2 ab 26.7 an 15.8 di hy ol mt ap 10.1 9.3 4.7 6.3 2.3 Cottonwood Creek, Montana. L. G. Eakins. G. P. Merrill, Pr. U. S. Nat. Mus., XVII, p. 648, 1895. Augite- porphyrite. S0 3 Cl Li.jO 0.03 trace 0.03 Q 6.1 or 20.0 ab 29.3 an 24.5 hy mt il ap 9.5 4.6 1.8 1.0 Baldy Mountain, Bear Gulch, Montana. J. P. Whitfield. J. P. Iddings, B. TJ. S. G. S., 148, p. 129, 1897. Shoshonite. SO3 LUO 0.19 0.00 Q 7.0 or 26.1 ab 27.8 an 21.4 C 1.6 hy mt il 6.3 5.3 1.4 Two Ocean Pass, Yellowstone National Park. J. P. Whitfield. J. P. Iddings, J. G., HI, p. 944,1895. Shoshonite. Also in M. U. S. G.S.,XXXII, p.340,1899. Q 1.8 or 23.4 ab 33.0 an 18.1 di hy mt il ap 4.2 8.6 5.8 1.2 1.1 Indian Peak, Yellowstone National Park. L. G. Eakins. J. P. Iddings, J. G., Ill, p. 944,1895. Shoshonite. Also in M. U. S. G.S., XXXII, p.340,1899. Nearmonzonose. Q 2.1 or 22.8 ab 27.2 an 21.1 di hy mt il ap 6.1 9.2 6.7 1.4 1.0 Beaverdam Creek, Y ellowstone National Park. L. G. Eakins. J. P. Iddings, J. G., Ill, p. 944,1895. Shoshonite. Also in M. IT. S. G.S.,XXXII, p.340,1899. Probably same as No. 10 be¬ low. or 28.4 ab 30.4 an 20.6 ne 2.8 di ol mt il ap 2.3 6.3 4.6 1.4 1.2 Beaverdam Creek, Yellowstone National Park. L. G. Eakins. J. P. Iddings, J. G., Ill, p. 944,1895. Leucite- banakite. * Also in M. U. S. G.S.,XXXII, p.349,1899. Same rock as No. 14 below. S0 3 Cl Li 2 0 0.22 0.16 0.04 Q 3.2 or 20.0 ab 26.7 an 24.2 di hy mt il ap 4.3 8.7 7.4 1.8 1.1 Beaverdam Creek, Yellowstone National Park. J. P. Whitfield. J. P. Iddings, B. IT. S. G. S. 148, p. 129, 1897. Shoshonite. Also in M. IT. S. G.S..XXXII, p.340,1899. Probably same as No. 8 above. Q 3.2 or 21.7 ab 26.7 an 23.6 di hy mt il ap 5.3 5.1 4.6 1.5 1.4 Near Pyramid Peak, Yellowstone National Park. L. G. Eakins. J. P. Iddings, J. G., Ill, p.944,1895. Leucite? Shoshonite. Also in M. U. S. G.S.,XXXII. p.340,1899. or 18.9 ab 27.2 an 21.4 di hy ol mt il ap 5.9 11.6 5.9 5.3 0.9 1.3 Hurricane Ridge, Crandall Basin, Yellowstone National Park. L. G. Eakins. J. P. Iddings, M. U. S. G. S., XXXII, p. 260, 1899. Orthoclase- basalt. SO3 Cl Li.,0 0.17 trace trace or 21.7 ab 28.3 an 22.0 di hy ol mt il lim ap 10.8 4.3 0.5 2.3 1.6 4.8 1.7 Sepulchre Mountain, Yellowstone National Park. J.P. Whitfield. J. P. Iddings, M. S. G. S., XXXII, p. 340, 1899. Shoshonite. SO3 Cl Li,0 0.21 trace 0.13 or 24.5 ab 32.5 an 23.9 ne 2.6 ol mt il ap 4.4 7.4 1.1 1.7 Beaver Dam Creek, Y ellowstone National Park. J. P. Whitfield. J. P. Iddings, M. U. S. G. S., XXXII, p. 349, 1899. LeucRe- banakite. Same rock as No. 9 above. Zr0 2 FeS s Cr 2 Og V,Os NiO SrO none 0.05 trace 0.04 0.01 0.10 or 20.6 ab 25.2 an 20.3 di hy ol mt il ap 12.4 8.5 0.6 5.8 1.8 1.1 Dike Mountain, Yel¬ lowstone National Park. W. F. Hille- brand. Hague and Jaggar, B. U. S. G. S., 168, p. 98, 1900. Augite- andesite. 268 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS II. DOSALANE—Continued. RANG 3. ALKALICALCIC. ANDASE—Continued. No. Si0 2 Al-A FeA FeO MgO CaO NajO k 2 0 h 2 0+ H 2 0- co 2 Ti0 2 FA MnO BaO Sum Sp. gr. 16 50. 29 15.85 8. 22 1.43 4. 65 7. 71 2. 98 3.53 1.98 1.77 none 0. 96 0.51 0.15 0.15 100. 27 Al. I .838 .155 .051 .020 .116 .137 .048 .037 .012 .003 .002 .001 17 50. 06 17.00 2. 96 5.42 3.61 8.14 3. 53 3. 40 4. 85 0.51 0. 66 0.14 100. 28 A2. II .834 .167 .024 .075 .090 .145 .057 .036 .006 .005 .002 18 56. 90 18. 50 0.17 4. 61 5.10 6.17 2.99 4.14 0.51 0.19 0. 79 trace 100. 07 A2. II .948 .181 .001 .064 .127 .110 .048 .044 .002 .005 — 19 52. 59 17.91 3. 81 5.18 4. 11 7.24 2. 94 3. 83 1.24 0. 84 0.14 trace 99. 88 2. 83 A2. II .877 .175 .024 .072 .103 .129 .047 .040 .010 .001 — 22°. 5 20 49. 69 18.06 2. 64 6.19 5. 73 8. 24 2.99 3. 90 0.91 m 0. 85 0. 81 0.13 100. 27 A2. II .828 .177 .016 .086 .143 .147 .048 .041 .011 006 .002 21 48. 25 16. 73 3.99 6. 28 5. 77 8. 32 3. 24 4. 08 1. 72 0. 89 0. 68 trace 0. 01 100.16 Al. I .804 .164 .025 .088 .144 .148 .052 .043 .011 .005 — — 22 54.20 15.86 3. 32 4.14 3.51 5. 32 3. 28 3. 30 2. 40 0.55 1.45 1.35 0. 68 0.19 0. 41 100. 28 Al. I .903 .156 .021 .058 .088 .095 .053 .035 .017 .005 .003 .003 23 56. 78 16. 86 3.56 2. 93 3. 41 6.57 3.19 3. 48 1.21 0.15 0.18 1.15 0. 42 99. 89 2. 67 A2. II .946 .165 .022 .040 .085 .118 .051 .037 .014 .003 24 56.19 16. 76 3.05 4.18 3. 79 6. 53 2.53 4. 46 0. 66 0. 34 0. 69 0. 55 0.10 0.19 100. 02 Al. I .937 .164 .020 .058 .095 .117 .041 .048 .009 .004 .001 .001 23 47.6 17.6 4.8 5.8 5.0 8.6 2.3 4.3 2.2 1.6 99.8 A3. Ill .792 .172 .030 .080 .125 .153 .037 .046 .020 26 47.1 18.1 3.0 8.5 7.3 6.6 2.4 2.8 3.6 0.4 0.1 99.9 A3. Ill .785 .177 .019 .118 .183 .118 .039 .030 .005 .001 27 58. 20 19. 20 1.10 3. 52 2. 01 3. 67 3. 60 4. 55 1.40 2. 40 99. 65 A3. Ill .970 .188 .007 .049 .050 .066 .058 .049 28 59. 41 17. 92 1.71 2.40 2. 99 4. 65 2. 63 5.60 1.30 0.01 0. 87 99. 49 A3. Ill .990 - .175 .011 .033 .077 .083 .042 .060 — .006 29 47. 50 17. 57 7.24 5. 08 3. 31 7.09 3. 60 3.28 1.70 0. 30 3. 02 0. 48 100.17 A2. II .792 .172 .045 .071 .083 .127 .058 .035 .036 .003 30 55.19 16. 42 5. 20 4. 28 2.31 8. 23 2. 82 3. 79 2. 26 100. 50 2. 748 A3. Ill .920 .161 .032 .060 .058 .146 .045 .040 31 51.98 18. 84 4. 98 5. 40 2. 77 6.13 3.04 3.60 2. 58 99. 32 A3. Ill .866 .185 .031 .075 .069 .109 .049 .038 32 54.23 14. 37 2.26 4. 76 7. 71 7.00 2. 56 3. 30 1.79 0. 59 0. 89 0. 48 100.09 2. 779 A 2. II .904 .141 .014 .066 .193 .125 .041 .035 ^ .011 .003 DOSALAN E-SHOSHONOSE. 269 ORDER 5. PERFELIC. GERMANARE—Continued. SUBRANG 3. SODIPOTASSIC. SHOSHONOSE—Continued. Inclusive. Cl trace Q 0.9 di 12.3 NiO trace or 20.6 hy 5.9 SrO 0.09 ab 25.2 mt 1.9 LioO trace an 19.5 il 1.8 hm 6.9 ap 1.1 or 20.0 di 12.3 ab 27.2 ol 6.5 an 20.7 mt 5.6 ne 1.4 il 0.9 ap 1.7 Cl trace Q 1.3 di 1.4 or 24.5 hy 21.3 ab 25.2 mt 0.4 an 24.7 ap 1.7 Cl 0.05 or 22.2 di 9.4 ab 24.6 hy 10.1 an 24.5 ol 0.4 mt 5.6 il 1.5 Cl 0.13 or 22.8 di 9.4 ab 19.4 ol 12.8 an 24.5 mt 3.7 ne 3.1 il 1.7 ap 1.9 so 3 0.12 or 23.9 di 14.6 Cl 0.08 ab 14.7 ol 10 . 3 an 19.2 mt 5.8 ne 6.8 il 1.7 ap 1.6 FeS 2 0.26 Q 7.1 di 2.7 NiO 0.02 or 19.5 hy 10.2 SrO 0.04 ab 27.8 mt 4.9 LioO trace an 18.9 il 2.6 ap 1.6 di 8.0 Q 8.6 hy 5.8 or 20.6 mt 5.1 ab 26.7 il 2.2 an 21.4 ap 1.0 SrO trace Q 5.9 di 6.8 Li a O trace o- 26.7 hy 10.1 ab 21.5 mt 4.6 an 20.9 il 1.2 ap 1.2 or 25.6 di 14.3 ab 12.0 ol 7.0 an 24. 7 mt 7.0 ne 4.0 il 3.1 or 16.7 di 2.3 ab 20.4 hy 1.5 an 30.0 Ol 19.5 mt 4.4 il 0.8 Q 6.2 hy 10.5 or 27.2 ab 30.4 an 18.3 C 1.5 mt 1.6 Q 7.4 di 2.2 or 33.4 hy 9.6 ab 22.0 an 20.3 mt 2.6 or 19.5 di 8.2 ab 27.2 ol 3.2 an 22.0 mt 8.1 ne 1.7 il 5.5 hm 1.6 ap 1.1 Q 6.1 •di 15.8 or 22.2 hy 1.8 ab 23.6 an 21.1 mt 7.4 Q 1.4 di 2.5 or 21.1 hy 11.4 ab 25. 7 an 27.2 mt 7.2 so 3 0.15 Q 2.0 di 11.1 or 19.5 hy 19.4 ab 21.5 mt 3.2 an 18.1 il 1.7 ap 1.1 Locality. Deer Creek, Yellow¬ stone National Park. Lamar River, North Bison Peak, Yel¬ lowstone National Park. Turkey Creek, Jeffer¬ son County, Colo¬ rado. Table Mountain, Denver, Colorado. Table Mountain, Denver, Colorado. Valmont, Boulder County, Colorado. Lane and Hayward Mine, Silver Bow Basin, Alaska. Clover Meadow, Tuolumne County, California. Table Mountain, Tuolumne County, California. Malvern, England. Swinyards Hill, Malvern, England. Hopital-Camfront, Brittany, France. | Cabezo Felipe, Cartagena, Spain. Huken, Christiania Fjord, Norway. Gebweiler, Vogesen. Masmiinster, Vogesen. Soterburg, Nahethal, Rh. Prussia. Analyst. Reference. Author’s name. Remarks. W. F. Hille- brand. Hague and Jaggar, ' B. U. S. G. S., 168, p. 97, 1900. Gabbro- porphvry. L. G. Eakins. J. P. Iddings, J. G., Ill, p. 944, 1895. Shoshonite. Also in M. U. S. G.S.,XXXII, p. 340, 1899. L. G. Eakins. W. Cross, M. U. S. G. S., XXVII, p. 310, 1896. Augite-mica- syenite. W. F. Hille- brand. W. Cross, M. U. S. G. S., XXVII, p. 306, 1896. Basalt. Late flow. W. F. Hille- brand. W. Cross, M. U. S G. S., XXVII, p. 308, 1896. Basalt. Early flow. L. G. Eakins. W. Cross, M. U. S. G. S., XXVII, p. 301, 1896. Dolerite. Near kentallen- ose. W. F. Hille- brand. G. F. Becker, B. U. S. G. S., 148, p. 233, 1897. Diorite. Not fresh. G. Steiger. F. L. Ransome, A. J. S., V, p. 363, 1898. Augite-latite. Also in B. U. S. G. S., 89, p. 58, 1898. W. F. Hille- brand. H. W. Turner, 14A. R. U. S.G.S.,II, p. 491, 1894. Basalt. (Aug¬ ite-latite, F. L. R.) Also cf. F. L. Ransome, A. J. S., V, p. 363, 1898. J. H. Player. C. Callaway, Q. J. G. S., XLIX, p. 419, 1893. Diorite. One decimal. J. H. Player. C. Callaway, Q. J. G. S., XLIX, p. 420, 1893. Diorite. One decimal. ' Not stated. C. Barrois, Guide Exc. VIII, Cong. G. Int., VII, p. 19, 1900. Kersantite. Near pulaskose. A. Osann. A. Osann, Z. D. G. G., XLIII, p. 719, 1891. Andesite L. Schmelck. W. C. Brbgger, Q. J. G. S., L, p. 33, 1894. Labrador- porphvrite. V. Traumann. A. Osann, Abh. Sp. K. Els.-Loth., III, p. 117, 1887. Labrador- porphyrite. A. Walther. A. Osann, Abh. Sp.K.Els.-Loth., Ill, p. 125, 1887. Labrador- porphyry. ‘Sum low. Bottcher. K. A. Lossen, Jb. Pr. G-L. A., X, p. 309, 1892. Olivine- weiselbergite. S0 3 for S. 270 CHEMICAL ANALYSES OF IGNEOUS ROCKS. CLASS II. DOSALANE—Continued. RANG 3. ALKALICALCIC. ANDASE—Continued. No. Si0 2 A1A Fe 2 0 3 FeO MgO CaO Na 2 0 k 2 o H 2 0+ ;H 2 0 — C0 2 Ti0 2 PA MnO BaO Sum Sp. gr. 33 52. 25 14. 93 3. 50 3. 70 5. 84 6. 33 2. 86 3. 76 2. 68 2. 62 0. 62 0. 62 99. 92 2. 725 A2. II .871 .146 .022 .051 .146 .112 .046 .040 .008 .004 34 50. 31 16. 72 4.19 5.01 6. 69 7. 73 2. 50 2.53 3.16 0.13 0. 64 99. 98 2. 777 A2. II .839 .164 .026 .070 .167 .137 .040 .026 .008 35 51.80 16. 65 4.93 2.14 6.90 7. 35 3. 68 4. 05 1.32 0. 50 0. 29 99.61 A3. Ill .863 .163 .030 .030 .173 .131 .059 .043 .004 36 54.55 15. 44 3. 48 0. 80 4. 41 7. 85 2.45 4. 09 3.75 2.16 0.96 0.45 100.49 2. 67 A2. II .909 .152 .022 .011 .110 .140 .040 .043 .012 .003 37 51.53 18. 28 4. 89 2.11 1.69 5.10 3.01 4. 74 6. 90 1.33 0. 46 0.18 100. 29 2.554 A2. II .859 .179 .031 .030 .042 .091 .048 .050 .016 .003 .002 38 50. 98 18. 94 5. 82 1.83 0. 32 6. 88 3. 22 4. 67 4.01 1.23 0. 21 98.11 2.548 D2. V .850 .185 .036 .025 .008 .123 .052 .050 .015 .001 39 50. 08 18. 87 3. 48 3. 49 2.14 6. 70 4.10 4. 58 4.17 0. 26 1.39 0. 39 0. 29 100.16 2.651 ! Al. I .835 .185 .022 .049 .054 .120 .066 .049 # .017 .003 .004 40 50. 52 17. 98 5.09 5.90 3. 36 7.95 3. 60 3. 70 1.03 trace 1.31 100.44 2. 855 A3. Ill .842 .176 .032 .082 .084 .143 .058 .039 l — .009 41 49. 75 16. 72 5. 70 4.99 3.89 9. 69 3.08 3.02 2.18 0.18 0. 72 99. 92 2. 857 A2. II .829 .164 .036 .069 .097 .173 .050 .033 .002 .005 42 54. 56 16. 49 1.02 5. 65 8. 57 7. 95 2.07 3. 35 0.15 1. 10 trace 100. 91 B2. Ill .909 .162 .006 .078 .214 .142 .033 .036 .013 — 43 54.14 16.42 1.69 5. 26 8. 44 8. 05 2.20 3. 34 0. 56 1.23 trace 101.33 B2. Ill .902 .161 .011 .073 .211 .144 .035 .036 .015 — 44 56. 76 16. 79 2.07 6. 95 1.63 6.01 2.43 4. 67 2.44 0. 47 100. 22 2. 470 B3. IV .946 .165 .013 .097 .041 .107 .039 .050 .003 45 56. 32 18.17 2. 23 6. 47 2.84 5.33 1.80 4.18 2.15 0. 34 99. 83 2. 520 B3. IV .939 .178 .014 .090 .071 .095 .029 .045 .002 46 58. 78 16.97 1.13 2.10 1.46 7. 27 3.67 4.18 3.60 • 0. 32 0.17 100. 09 A3. Ill .980 .167 .007 .030 .037 .130 .059 .045 .002 .002 47 55. 69 19.08 4. 07 3.26 3. 41 6. 87 2. 89 4. 41 0.17 trace 99. 85 2. 717 A3. Ill .928 .187 .025 .045 .085 .123 .047 .047 — 48 52.12 18. 47 3.40 4. 77 5.11 8. 71 3.07 3.29 0. 46 trace 0. 25 trace 99. 65 A3. Ill .869 .181 .0?1 .067 .128 .155 .050 .035 — .002 — 49 53.31 17.34 9.01 2.00 0. 73 9. 06 3. 42 3. 35 0.14 1.44 99. 80 2.686 A3. Ill .889 .170 .056 .028 .018 .161 .055 .036 .021 15° ^ DOSALANE—SHOSHONOSE. 271 ORDER 5. PERFELIC. GERM AN A RE—Continued. SUBRANG 3. SODIPOTASSIC. SHOSHONOSE—Continued. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. S0 3 0.21 Q 1.7 or 22.2 ab 24.1 an 16.7 di hy mt il ap 8.7 13.4 5.1 1.1 1.4 Breiten brunnen, Querbachthal, Thuringerwald. G. F. Steffen. H. Loretz, Jb. Hr. G.L-A., VIII, p. 112, 1888. Kersantite. S0 3 for S. Not fresh. S0 3 trace Q 0.3 or 14.5 ab 21.0 an 27.2 di hy nit il 8.7 17.2 6.0 1.2 Querenberg, n. Giessubel, Thiiringerwald. G. F. Steffen. H. Loretz, Jb. Pr. G. L-A., IX, p. 306, 1889. Melaphyre. or 23.9 ab 22.5 an 17.0 ne 4.5 di ol mt 15.3 7.2 7.0 Stengerts, Spessart, Bavaria. H. Stuber. E. Goller, N. J. B. B., VI, p. 566, 1889. Kersantite. S0 3 Org 0.10 trace Q G.l or 23.9 ab 21.0 an 19.2 di hy il hm ap 13.2 4.9 1.8 3.5 1.1 Gronig, St. Wendel, Harz Mountains. Hesse. K. A. Lossen, Jb. Pr. G. L-A., X, p. 266, 1892. Diorite- porphyrite. Not fresh. S 0.07 Q 4.0 or 27.8 ab 25.2 an 22.5 hy mt il hm ap 4.2 3.2 2.3 2.7 1.1 Mondhalde, Kaiserstuhl, Baden. F. Graeff. F. Graeff, Mt. Bad. G. L-A., IV. Mondhaldeite. Cl S trace trace Q 2.0 or 27.8 ab 27.2 an 20.3 di wo mt il hm 1.8 4.8 2.3 2.2 15 Fohrenberg, Kaiserstuhl, Baden. K. Gruss. K. Gruss, Mt. Bad. G. L-A., IV, p. 97, 1900. Mondhaldeite. Sum low. Cl s 0.18 0.04 or 27.2 ab 23.1 an 19.5 ne 6.2 di ol mt il ap 9.0 1.7 5.1 2.6 1.0 Mondhalde, Kaiserstuhl, Baden. F. Graeff. F. Graeff, cf. N. J., 1890, II, p. 65. Tephrite. Border of dike. Cf. No. 83, an- dose. or 21.7 ab 28.8 an 22.0 ne 0.3 di ol mt ap 7.3 8.4 7.4 3.0 Rongstock, Bohemia. R. Pfohl. J. E. Hibsch, T. M. P. M., XV, p. 487, 1895. Dolerite (essexite). Alkalies and Ti0 2 ? Cf. No 14, essexose. or 18.3 ab 25.2 an 22.5 ne 0.6 di ol mt ap 16.9 4.3 8.4 1.7 Eichberg, n. Habendorf, Bohemia. R. Pfohl. J. E. Hibsch, T. M. P. M., XIV, p. 112, 1894. Leucite- tephrite. or 20.0 ab 17.3 an 25.9 di hy ol mt il 11.0 20.3 2.1 1.4 2.0 Radicofani, Tuscany. H. S. Washing¬ ton. H. S. Washington, A. J. S„ IX, p. 52, 1900. Andesite (gray) Dried at 110°. Sum high. or 20.0 ab 18.3 an 25.3 di hy oi mt il 9.8 21.2 1.0 2.6 2.3 Castle Gate, Radicofani, Tuscany. H. S. Washing¬ ton. H. S. Washington, A. J. S., IX, p. 52, 1900. i Andesite (black) Dried at 110°. Sum high. ■Q 7.0 or 27.8 ab 20.4 an 21.1 di 4.5 hy 13.0 mt 3.0 ap 1.1 Sassara, n. Lake Bolsena, Italy. L. Ricciardi. C. Klein, Sb. Berl. Ak., 1888, p. 96. Olivine- trachyte. Alkalies low? Also in N. J. B. B., VI, p. 7 y 1889. Q 9.5 or 25.0 ab 15.2 an 26.4 C 0.9 hy mt 17.1 3.2 Mont’ Alfina, n. Lake Bolsena, Italy. . L. Ricciardi. C. Klein, Sb. Berl. Ak., 1888, p. 96. Olivine- trachyte. Alkalies low? Also in N. J. B. B., VI, p. 7, 1889. so 3 Cl 0.44 trace Q 6.7 or 25.0 ab 30.9 an 17.5 di mt ap 13.6 1.6 0.8 Bagnaia, n. Viterbo, Italy. L. Ricciardi. A. Verri, B. Soc. G. Ital., VIII, p. 403, 1889. Trachyte. Alkalies? Q 2.6 or 26.1 ab 24.6 an 25.9 di hy mt 6.8 7.3 5.8 Monte Santa Croce, Rocca Monfina, Italy. II. S. Washing¬ ton. H. S. Washington, J. G., V, p. 252, 1897. Blotite- vulsinite. Dried at 110°. so 3 trace or 19.5 ab 25.2 an 26.7 ne 0.6 di ol mt 13.3 9.1 4.9 Tilba Tilba Lake, South Coast, New South Wales. J. C. H. Min- gaye. W. Anderson, Rec. G. S. N. S. W., II, p. 153, 1902. Hornblende- andesite. Q 5.1 or 20.0 ab 28.8 an 22.0 di wo mt hm 3.9 7.4 6.5 4. 5 Port Resolution, Tanna Island, New Hebrides, Pacific Ocean. A. Liversidge. A. Liversidge, Jour. R. Soc. N. S.W., XX, p. 237, 1887. Glassy lava. A1 2 0 3 and Fe 2 0 3 transposed. MgO low? MnO high. 272 CHEMICAL ANALYSES OF IGNEOUS ROCKS. CLASS II. DOSALANE—Continued. RANG 3. ALKALICALCIC. ANDASE—Continued. No. Si0 2 A1A Fe 2 0 3 FeO MgO CaO Na,0 k 2 o H 2 0 + H,0 C0 2 Ti0 2 PA MnO BaO Sum Sp. gr. 1 46. 61 15.34 8.40 8.14 5.27 9. 27 3. 04 1.41 1.41 0. 55 0. 39 99. 83 A2. II . 777 .150 .052 .113 .132 '. 166 .049 .015 .007 .006 2 52.12 16. 35 3. 68 6. 02 4.14 7.25 3. 65 2. 34 0. 88 0. 25 0. 07 2.10 0. 89 0.17 0.04 100. 33 Al. I .869 .160 .023 .084 .104 .129 .059 .025 .026 .006 .002 — 3 55.51 16.51 1.68 4.57 6. 73 n o o. 16 3.19 2.46 1.53 0.91 0.17 0.11 0.02 100.12 Al. I .915 .161 .011 .064 .168 .120 .051 .026 .011 .001 .002 _ 4 51. 82 17.06 1.97 8. 60 4.87 8. 59 3. 44 1. 77 0. 20 0.11 2.15 trace 100. 58 A3. Ill .864 . 167 .012 .120 .122 .153 . 056 .019 .026 — 5 47.28 20. 22 3. 66 8. 89 3. 17 7. 09 3.94 2. it 2. 73 0. 68 0. 77 100.59 A3. Ill .788 .198 .023 .124 .079 .127 .063 .023 .005 .011 6 55.34 16. 37 0. 77 7.54 5. 05 7. 51 4. 06 2. 03 0. 58 trace 99. 65 A3. Ill .922 .160 . 005 .105 .126 .134 .065 .022 7 50. 86 15. 72 9.77 2. 48 3.55 10. 52 3. 89 0. 90 2. 53 100. 22 A3. Ill .848 .154 .061 .035 .089 .187 .063 .010 8 52. 48 15.47 5.14 9.25 2. 55 7.27 3. 26 1. 75 1.24 1.26 0. 29 0. 51 none 100.47 2. 83 A2. II .875 .151 .032 .129 . .064 .129 .052 .019 .016 .002 .007 — 9 54. 56 17.58 4.30 4. 98 2. 86 6. 00 4. 43 2. 70 0. 38 0. 02 1.34 0. 60 0. 06 0. 27 100.16 Al. I .909 .172 .027 .069 .072 .107 .071 .029 .017 .004 .001 .002 10 53. 48 19. 35 2. 37 4. 90 3. 67 7.55 4. 07 1.41 0. 80 0.16 0. 08 1.07 0. 62 0.06 0.19 99. 89 Al. I .891 .190 .015 . 068 .092 .135 .066 .015 .013 .004 .001 .001 11 50. 73 19. 99 3. 20 4. 66 3.48 8. 55 4.03 1.89 0. 66 0.11 1.59 0.81 0.05 0. 27 100.13 Al. I .846 .196 .020 .065 .087 . 153 . 065 .020 .020 .006 .001 .002 12 56. 80 18. 30 1.64 5.58 3. 63 5.31 4. 35 3. 28 0.53 0. 46 trace trace 0.05 99. 93 2. 83 A2. II .947 .179 .010 .078 .091 .095 .070 .035 .006 — 13 55.13 20. 27 1.52 4. 29 1.80 7. 05 4. 31 2. 84 0. 95 0.14 0. 26 0. 74 0. 40 0. 13 0. 06 100. 00 Al. I .919 .198 .009 .060 .045 .126 .069 .030 .009 .003 .002 — 14 56.41 17. 62 1.24 3.55 3.97 8. 66 3. 35 2. 61 0. 76 0.14 0.68 0.49 0. 08 0. 09 99. 70 Al. I .940 .174 -.007 .050 .099 .154 .054 .027 .008 .003 .001 .001 15 57. 78 16. 28 1.02 4. 92 4. 60 6. 65 3. 25 2. 22 0. 92 0. 34 0.15 1.07 0. 30 0.15 0.12 99. 88 Al. I .963 .160 . 006 .068 .115 .119 .052 .023 • .013 .002 .002 .001 16 58. 05 18. 00 2. 49 4.56 3. 55 6.17 3. 64 2.18 0. 86 1.05 0.17 none 100.79 Al. I .968 .176 .016 .063 .089 .110 . 059 .022 .013 .001 — 17 57.64 18. 43 3. 63 2. 84 3. 32 5. 49 4. 03 3. 33 0. 51 0. 77 0. 34 0.10 100.43 A2. II .961 .181 .023 .040 .083 .098 .065 .035 .010 .002 .001 DOSALANE AN DOSE. 273 ORDER 5. PERFELIC. GERMANARE—Continued. SUBRANG 4. DOSODIC. ANDOSE. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. or 8.3 ab 25.7 an 23.9 di hv ol rat il 18.1 1.0 7.2 12.0 1.1 Coldbrook Marsh, St. John, New Brunswick. W. D. Matthew. W. D. Matthew, Tr. N. Y. Ac. Sei., XIV, p. 214, 1895. Quartz-diabase. Cl F FeS a NiO 0.09 0.03 0.24 trace Q 2.4 or 13.9 ab 30. 9 an 21.1 di hy rat il ap 7.4 11.5 5.3 3.9 2.0 Mount Ascutney, Vermont. W. F. Hille- brand. R. A. Daly, B. U. S. G. S., 148, p. 69, 1897. Diorite. Q 2.3 or 14.5 ab 26.7 an 23.4 di hy rat il 8.1 18.4 2.6 1.7 South Leverett, Massachusetts. L. G. Eakins. B. K. Emerson, M. U. S. G. S.,XXIX, p. 336, 1898. Tonalite. or 10.6 ab 29.3 an 25.6 di hy ol mt il 14.2 8.0 5.8 2.8 4.0 Peach’s Neck, Mar¬ blehead, Massachu¬ setts. H. S. Washing¬ ton. IL S. Washington, J. G., VII, p. 60,1899. Diorite. or 12.8 ab 27.8 an 31.1 ne 2.8 ol mt ap 15.9 5.3 1.6 Medford, Massachu¬ setts. G. P. Merrill. G. P. Merrill, B. G. S. A., VII, p. 353, 1896. Diabase. or 12.2 ab 34.1 an 20.3 di hy ol mt 14.0 11.4 5.3 1.2 Montrose Point, Cort- landt, New York. * M. D. Munn. J. D. Dana, A. J. S., XXII, p. 104, 1881. Norite. Also cf. G. H. Williams, A. J. S., XXXIII, p. 193,1887. Q 3.2 or 5.6 ab 33.0 an 22.5 di wo mt hm 19.3 2.0 8.1 4.2 Near Baptism River, Minnesota. Dodge and Sid- ener. M. E. Wadsworth, B. G. Nh. S. Minn., 2, p. 79, 1887. Gabbro. Near beer- bach ose. SrO none Q 5.6 or 10.6 ab 27. 2 an 22.5 di hy mt il 11.4 11.6 7.4 2.4 Duluth, Minnesota. A. N. Winchell. A. N. Winched, A. G., XXVI, p. 293, 1900. Orthoclase- gabbro. SrO LioO 0.08 trace Q 2.7 or 16.1 ab 37.2 an 20.0 di hy mt il ap 6.3 8.1 1.2 2.6 1.2 Big Timber Creek, Crazy Mountains, Montana. W. F. Hille- brand. J. E. Wolff, B. U. S. G. S., 148, p. 143, 1897. Diorite- porphyrite. SrO 0.11 Q 2.5 or 8.3 ab 34.6 an 30.3 di hy mt il ap 3.2 13.0 3.5 2.0 1.2 Sweet Grass Creek, Crazy Mountains, Montana. W. F. Hide- brand. J. E. Wolff, B. U. S. G. S., 148, p. 143, 1897. Quartz-diorite. SrO LioO 0.11 trace or 11.1 ab 34.1 an 30.9 di hv ol mt il ap 5.0 5.3 3.1 4.6 3.1 1.9 Big Timber Creek, Crazy Mountains, Montana. W. F. Hide- brand. J. E. Wolff, B. U. S. G. S., 148, p. 144, 1897. Diorite. LioO trace or 19.5 ab 36.7 an 20. 6 di hy mt il 4.8 14.9 2.3 0.9 Robinson, Castle Mountains, Montana. L. V. Pirsson. Weed and Pirsson, B. U. S. G. S., 139, p. 90, 1896. Diorite. SrO Li«0 0.11 trace Q 0.7 or 16.7 ab 36.2 an 27.5 di hy mt il 6.2 6.9 2.1 1.4 Carpenter Creek, Little Belt Moun¬ tains, Montana. W. F. Hide- brand. L. V. Pirsson, 20 A. R. U. S. G. S., Ill, p. 490, 1900. Diorite. - Cl SrO 0.07 0.08 Q 4.9 or 15.0 ab 28.3 an 25.9 di hy mt il ap 12.0 8.7 1.6 1.2 1.0 Red Mountains, n. Butte, Montana. II. N. Stokes. W. H. Weed, J. G., VII, p. 739, 1899. Diorite. S NiO SrO 0.02 0.02 0.07 Q. 8.7 or 12.8 ab 27.2 an 23.6 di 7.9 hy 14.1 mt 1.4 il 2.0 Croesus Mine, Hailey, Idaho. W. F. Hide- brand. W. Lindgren, 20 A. R. U. S. G. S., Ill, p. 81, 1900. Gabbro. Near tonalose. so 3 Cl Li 2 0 0.07 trace none Q* 8.9 or 12.8 ab 30.9 an 26.1 di hy mt il 3.7 9.6 3.7 2.0 Electric Peak, Yell. Nat. Park. J. E. Whitfield. J. P. Iddings, 12 A. R. U. S. G. S., I, p. 627, 1891. Pvroxene- mica-diorite. Cl trace Q 5.5 or 19.5 ab 34.1 an 22.5 di hy mt il 3.9 7.3 5.3 1.5 Hurricane Ridge, Crandall Basin, Yell. Nat. Park. L. G. Eakins. J. P. Iddings, M. U. s. G. S., XXXII, p. 261, 1899. Diorite. 14128—No. 14—03-18 274 CHEMICAL ANALYSES OE IGNEOUS ROCKS. CLASS II. DOSALANE—-Continued. RAXG 3. ALKALICALCIC. ANDASE—Continued. No. SiO, AM >3 Fe.XLj FeO MgO CaO Na 2 G k 2 o h 2 o+ H 2 0— C0 2 Ti0 2 PA MnO BaO Sum Sp. gr. 18 57. 38 16. 86 2.49 5.17 5. 51 7.32 3.33 1.45 0. 42 trace trace trace 100. 70 A2. II .956 .165 .016 .072 .138 .131 .054 .015 — — 19 57. 32 17. 29 3. 89 3. 03 3. 56 5.81 3. 89 3. 04 0. 30 0. 33 0.62 0.50 0 . 06 99. 74 A2. II . 955 .170 .024 .042 .089 .104 .063 .032 .008 .003 .001 20 57. 26 19. 40 2. 49 3. 29 2. 57 5. 68 4.21 2. 95 0 . 86 0. 76 0.51 0.16 100.14 A2. II .954 .190 .016 .046 .064 .101 .068 .039 .010 .003 .002 21 57.17 17. 25 2. 48 4.31 4. 83 6.61 3. 44 2. 03 1.20 1.03 0.05 none 100. 40 A2. II .953 .169 .015 .060 .121 .118 . 055 . 022 .013 — — 22 56. 47 15. 33 2. 54 4. 53 5. 08 6 . 93 3.81 1 . 66 1. 65 0. 99 0. 54 0.18 99.71 ' A2. II .941 .150 .015 .062 .127 .123 .061 .018 .012 .004 .003 23 56.21 18. 24 3.26 3. 69 3. 38 5.91 4.15 3.02 0. 78 0 . 88 0.64 0.17 100. 33 A2. II .937 .179 .020 051 .085 .106 .067 .032 .011 .004 .002 24 55. 93 18.32 2. 39 4.91 3.97 6.17 4. 29 2 . 62 0.22 0.81 0. 56 0.14 100.33 A2. II .932 .180 .015 .068 .099 .110 .069 .028 .010 .004 .002 25 55.92 17. 70 3.16 4. 48 4.34 5. 90 4.08 2. 24 1.42 . 0.94 0.18 trace 100. 45 Al. I .932 .174 .020 .062 .109 .105 .066. .025 .012 .001 26 53. 89 18. 81 4. 92 2.81 3. 29 5. 42 3.65 2.98 2. 99 0. 49 0. 52 0.17 ■ 99.94 A2. II .898 .184 .031 .039 .082 .097 . 059 .032 .006 .004 .002 27 53. 75 20. 75 4.50 3. 53 3. 76 7.18 4.16 1.37 1. 55 none none 0.15 trace 100.70 A2. II .896 .203 .028 .049 .094 .128 .067 .015 — .001 — 28 53. 71 18.00 3.99 4. 05 5.19 6 . 88 3.50 3.10 0.55 0. 74 0.38 0. 24 100.33 A2. II .895 .176 .025 .056 .130 .123 . 056 .033 .009 .003 .003 29 53.57 17. 78 3.19 4. 93 4.36 6 . 22 4.04 3.04 0 . 80 0. 27 none 0. 89 0. 44 0. 07 0 . 21 99.91 Al. I .893 .174 .020 .068 .109 .110 .064 .032 .011 .003 .001 .002 30 52. 37 16.57 6 . 34 2. 35 5. 27 8.54 2.99 2.45 1.04 1.18 0. 73 0. 31 0.07 100. 33 A2. II .873 .162 .039 .033 .132 .152 .048 .026 .009 .002 .001 31 52.18 18.19 3. 31 4.36 4.69 6 . 51 4. 58 1.88 2.00 0. 75 none 0.99 0. 29 0.14 0 . 11 100.04 Al. I .870 .178 .021 .061 .117 .116 .074 .020 .012 .002 .002 .001 32 52. 09 17.84 4. 27 4. 56 5. 33 8 . 03 3.39 1.98 1. 77 0. 39 0. 27 0.14 100 . 06 A2. II .868 .175 .027 .081 .144 .143 .055 .021 .005 .002 .002 33 51. 70 17.90 7. 24 1.00 2. 77 6 . 94 4.17 1.62 1.15 3.17 0. 41 trace 100. 23 Al. I .862 .175 .045 .014 .069 .124 .068 .017 .039 .003 — 34 50. 99 15.62 8 . 47 1.43 5. 23 6.53 3. 39 3.05 2. 48 1.39 0. 67 0.53 trace 99. 85 A2. II .850 .153 .053 .019 .131 .116 .055 .032 .008 .003 —- DOSALANE-AN DOSE. 275 ORDER 5. PERFELIC. GERMANARE—Continued. SUBRANG 4. DOSODIC. ANDOSE—Continued. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. so 3 Cl LEO 0.21 0.17 0.39 Q 7.3 or 8.3 ab 28.3 an 26.7 di to¬ rn t 7.9 17.3 3.7 Electric Peak, Yell. Nat. Park. J. E. Whitfield. J. P. Iddings, 12 A. R. U. S. G. S., I, p. 627, 1891. Pyroxene- porphyrite. Li 2 0 high. NiO 0.10 Q 7.1 or 17.8 ab 33.0 an 21.0 di to¬ rn t il ap 3.8 8.4 5.6 1.2 1.1 Hurricane Ridge, Crandall Basin, Yell. Nat. Park. W. H. Melville. J. P. Iddings, M. U. S. G. S., XXXII, p. 261, 1899. Monzonite. Q 2.0 or 21.7 ab 35.6 an 23.1 di hy mt il ap 2.1 8.03 3.7 1.5 1.1 Hurricane Ridge, Crandall Basin, Yell. Nat. Park. L. G. Eakins. J. P. Iddings, M. U. S. G. S., XXXII, p. 261, 1899. Diorite. Facies of gab¬ bro. so 3 Cl LioO trace trace trace Q 7.6 or 12.2 ab 28.8 an 25.6 di hy mt il 5.9 13.6 3.5 1.8 Sepulchre Mountain, Yell. Nat. Park. J. E. Whitfield. J. P. Iddings, 12 A. R. U. S. G. S., I, p. 648, 1891. Pyroxene- andesite. * Q 6.8 or 10.0 ab 32.0 an 22.5 di by mt il ap 6.8 14.0 3.5 1.8 1.2 Near Dunraven Peak, Yell. Nat. Park. F. A. Gooch. .T. P. Iddings, B. U. S. G. S., 148, p. 135, 1897. Pyroxene- andesite. Q 3.8 or 17.8 ab 35.1 an 22.5 di hy mt il ap 3.0 9.7 4.6 1.7 1.3 Hurricane Ridge, Crandall Basin, Yell. Nat. Park. L. G. Eakins. J. P. Iddings, M. U. S. G. S., XXXII, p. 260, 1899. Orthoclase- gabbro- diorite. Q 1.6 or 15.6 ab 36.2 an 23.1 di Li¬ mit il ap 3.5 13.9 3.5 1.5 1.3 Hurricane Ridge, Crandall Basin, Yell. Nat. Park. L. G. Eakins. J. P. Iddings, M. U. S. G. S., XXXII, p. 260, 1899. Orthoclase- gabbro- diorite. so 3 Cl Li 2 0 trace none 0.09 Q. 3.5 or 13.9 ab 34.6 an 23.1 di by mt il 5.0 12.0 4.6 1.7 Sepulchre Mountain, Yell. Nat. Park. J.E. Whitfield. J. P. Iddings, 12 A. R. U. S. G. S., I, p. 648, 1891. Hornblende- andesite. Q 4.9 or 17.8 ab 30.9. an 25.9 hy mt il ap 8.4 1.4 4.8 1.2 Indian Peak, Crandall Basin, Yell. Nat. Park. L. G. Eakins. J. P. Iddings, M. U. S. G. S., XXXII, p. 260,1899. Basalt-glass. In breccia. S0 3 Cl LEO trace none trace Q 2.4 or 8.3 ab 35.1 an 33.6 di by mt 1.6 11.4 6.5 Mount Washburn, Yell. Nat. Park. J. E. Whitfield. J. P. Iddings, B. U. S. G. S, 148, p. 136, 1897. Basalt. or 18.3 ab 29.3 an 24.2 di hy mt 8.0 12.0 7.2 Hurricane Ridge, Crandall Basin, Yell. Nat. Park. L. G. Eakins. J. P. Iddings, M. U. S. G. S., XXXII, p. 260,1899. Mica-gabbro. Cr,0 3 NiO SrO Li. 2 0 none none 0.13 trace or 17.8 ab 33.5 an 21. 7 di by ol mt il 7.0 8.6 2.7 4.6 1.7 Beam’s Hill, Sunlight Valley, Yell. Nat. Park. H. N. Stokes. Hague and Jaggar, B. U. S. G. S., 168, p. 95, 1900. Gabbro. NiO 0.12 Q 3.4 or 14.5 ab 25.2 an 24.5 di by mt il hm 13.9 6.8 5.6 1.4 2.4 Stinkingwater Canyon, Yell. Nat. Park. W. H. Melville. J, P. Iddings, B. U. S. G. S., 148, p. 135, 1897. Basalt. Cl s NiO SrO Li 2 0 trace none trace 0.06 trace or 11.1 ab 38.8 an 23.4 di hy ol mt il 7.2 3.8 5.8 4.9 1.8 Shoshone Canyon, Yell. Nat. Park. W. F. Hille- brand. Hague and Jaggar, B. U. S. G. S., 168, p. 96, 1900. Diabase. or 11. 7 ab 28.8 an 27.5 di hy ol mt il 10.0 11.0 3.7 6 .3 0.8 Timber Creek, Crandall Basin, Yell. Nat, Park. L. G. Eakins. J. P. Iddings, M. U. S. G. S., XXXII, p. 260, 1899. Basalt. so 3 LioO Iron 0.32 0.03 1.81 Q 5.0 or 9.6 ab 35.6 an 27.8 hy il hm P f ir 6.9 2.2 7.2 3.5 1.8 Yellowstone Canyon, Yell. Nat, Park. J.E. Whitfield. J. P. Iddings, B. U. S. G. S., 148, p. 135, 1897. Basalt. Contains metal¬ lic iron; de¬ rived from mortar? NiO 0.07 Q 1.2 or 18.3 ab 28.8 an 18.1 di hy mt il hm ap 8.8 9.0 2.6 1.2 6.7 1.1 Stinkingwater Canyon, Yell. Nat. Park. W.H. Melville. J. P. Iddings, M. U. S. G. S., XXXII, p. 340, 1899. Hornblende- basalt? Near sho- shonose. 276 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS II. DOSALANE—Continued. RANG 3. ALKALICALCIC. ANDASE—Continued. No. Si0 2 A1 2 O s Fe,G :i FeO MgO CaO Na. 2 0 K 2 0 h 2 o+ H 2 0— co 2 TiG 2 FA MnO BaO Sum Sp. gr. 35 56.19 16.12 4. 92 4.43 4. 60 7. 00 2. 96 2.37 1.03 0. 27 trace 99. 91 2. 742 A3. Ill .937 .158 .031 .061 .115 .125 .048 .025 .002 — 36 56. 62 16. 74 4. 94 3. 27 4.08 7. 39 3.50 1.97 0. 92 1.15 trace 0.15 100. 73 A3. Ill .944 .164 .030 .046 .102 .132 . 056 .021 — .002 37 57.42 18. 48 3. 74 2.10 1.71 6.84 4.52 3. 71 0. 28 0. 08 none 0. 86 0. 36 0. 09 0.15 100. 45 2. 767 Al. I .957 .181 .023 .030 .043 .122 .072 .039 .011 .003 .001 .002 26° 38 55. 65 17.04 2. 81 5.17 3. 42 6. 82 3. 27 2. 29 1.49 0.46 0. 90 0.37 0. 20 0. 08 100.02 2. 783 Al. I .928 .167 .017 .072 .086 .121 .053 .024 .011 .003 .003 .001 22 ° 39 52. 97 18. 31 1.86 6. 73 3. 04 6.51 3. 74 3.35 0.31 0.44 1.04 0. 81 0. 09 0.18 99.57 Al. I .883 .179 .012 .093 . 076 .116 .060 . 035 .013 .006 .001 .001 40 47.32 16. 71 6. 92 5.94 5. 69 8.51 2. 70 2.02 1.04 0. 24 none 1.50 0. 96 0. 08 0. 07 99. 95 2. 949 Al. I .789 . 164 .043 .082 .142 .151 .043 . .006 .002 ' .001 — 28 52.81 16. 60 2. 66 6.13 6.12 10.14 2. 79 1.05 0. 54 0. 38 0. 84 0. 23 0.03 100. 32 Al. I .880 .163 017 .085 .153 .181 .045 .011 .010 .002 — 29 51.21 17. 59 4.71 4. 42 7. 12 10.36 2.. 49 0.91 1.07 0. 58 0.31 0.09 trace none 100. 86 Al. I .854 .172 .029 .061 .178 . 185 .040 .010 .004 .001 — —* 30 48. 76 16.60 5. 60 5.01 6. 93 8. 79 2.47 0. 66 2.19 1.49 0. 42 1.26 0.19 0.10 100. 37 2. 78 Al. I .813 .163 . 035 .070 .183 . 157 .040 .007 .016 .001 .001 DOS A LANE-HESSOSE. 289 ORDER 5. PERFELIC. GERM AN ARE—Continued. Sl’BRANG 3. PRESODIC. HESSOSE—Continued. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. SrO none or 2.8 ab 21.0 an 39. 2 di 4.5 hv 12.7 ol 13.9 mt 1.4 il 3.4 Birch Lake, Minnesota. 11. N. Stokes. A. N. Winehell, A. G., XXVI, p. 181,1900. Olivine-gabbro. SO* LioO 0.52 0.02 Q 0.3 or 3.3 ab 25.2 an 35.0 di 10.4 hy 12.0 tn 2.2 il 2.3 hm 7.6 Prospect Peak, Yel¬ lowstone National Park. J. E. Whitfield. J. P. Iddings, M.U.S.G.S.,XXXII, II, p. 438, 1899. Basalt. Same as No. 31 auvergnose, calc, to 100% after deduct- ing iron. Q 0.9 or 9.5 ab 25.2 an 33.4 di 7.8 hy 17.0 mt 5.8 Stony Mountain, Ouray County, Colorado. L. G. Eakins. W. Cross, B. U.S. G. S., 148, p. 180, 1897. Augite-diorite. Not described. S SrO Li,>0 0.02 trace trace Q 2.6 or 7.8 ab 26.2 an 35. 3 di 11.0 hy 6.1 mt 6.0 il 2.5 ap 1.0 Yentna River, Alaska. H. N. Stokes. J. E. Spurr, A. G., XXV, p. 233,1900. Augite-belugite. S Cr 2 0 3 NiO SrO Li 2 0 0.01 none none none trace Q 6.5 or 5.0 ab 22.5 an 29.2 di. 15.2 hy 10.9 mt 4.4 il 3.2 Camas Land, Kittitas County, Washington. H. N. Stokes. G. O. Smith, B. U. S. G. S., 168, p. 225, 1900. Olivine-diabase. S NiO SrO LioO 0.10 none none none or 1.1 ab 18.9 an 44.5 di 19.5 hv 3.1 Ol 7.6 mt 2.0 Beverley Creek, Kittitas County, Washington. H. N. Stokes. G. O. Smith, B.U. S. G. S., 168, p. 225, 1900. Gabbro. SrO LioO 0.07 trace Q 7.6 or 6.1 ab 30.9 an 32.5 di 7.2 hy 7.4 il 1.1 hm 6.2 Lassen Peak, California. W. F. Hille- brand. J. S. Hiller, B. U. S. G. S., 150, p. 218, 1898. Secretion in clacite. Dried at 100°. Near andose. Secretion in No. 40, lassen- ose. Cr 2 0 3 SrO 1 Li.,0 ' trace 0.04 trace Q 3.6 or 4.4 ab 25.2 an 34.8 di 10.6 hy 16.9 mt 2.8 il 0.9 Crater Peak, n. Lassen Peak, California. W. F. Hille- brand. J. S. Diller, B.U. S. G. S., 148, p. 197, 1897. Hypersthene- andesite. Dried at 110°. Secretion in No. 46, ton- alose. SrO Li.,0 0.03 trace Q 4.0 or 6.1 ab 24.6 an 36.1 di 9.9 hy 13.8 mt 4.6 il 1.1 Chaos, Lassen Peak, California. W. F. Hille- brand. J. S. Diller, B.U. S. G. S., 148, p. 194, 1897. Secretion in dacite. Dried at 110°. Secretion in No. 39, lassen- ose. SO* SrO trace trace Q 4.4 or 4.4 ab 30.4 an 31.4 di 9.3 hy 10.9 mt 6.3 il 1.2 Crater Peak, Shasta County, California. R. B. Riggs. J. S. Diller, B. U. S. G. S., 148, p. 200, 1897. Basalt. Dried at 110°. SrO LioO none trace or 1.7 ab 23.6 an 38.1 di 8.9 hy 5.9 ol 17.0 mt 3.2 il 1.1 McCloud River, Mount Shasta, California. PI. N. Stokes. J. S. Diller, B. U. S. G. S., 148, p. 190, 1897. Basalt. Not described. SrO LioO 0.04 trace Q 9.1 or 8.3 ab 27.8 an 30.9 di 5.3 hy 13.2 mt 3.5 il 0.8 Franklin Hill, Plumas County, California. W. F. Hille- brand. H. W. Turner, 17 A.R.U. S. G. S.,I, p. 731,1896. Hypersthene- andesite. Near bandose. SrO Li.,0 0.06 none Q 7.4 or 5.6 ab 26.2 an 31.4 di 9.9 hy 13.3 mt 3.9 il 1.1 Butte Mountain, Plumas County, California. W. F. Hille- brand. J. S. Diller, B. U. S. G. S., 148, p.195,1897. Pyroxene- andesite. Dried at 105°. SrO LioO trace trace Q 2.6 or 8.3 ab 24.6 an 31.7 di 15.8 hy 12.4 mt 3.2 il 0.9 Mount Ingalls, Plumas County, California. W. F. Hille- brand. H. W. Turner, A. J. S., XLIV, p. 458, 1892. Basalt. Also in 14 A. R. U.S.G. S.,II, p. 492, 1894. SrO LioO trace trace Q 2.7 or 6.1 ab 23.6 an 29.7 di 16.7 hy 14.9 nit 3.9 il 1.5 Mount Ingalls, Plumas County, California. W. F. Hille- brand. H. W. Turner, 14A.R. U. S. G. S.,II, p. 492, 1894. Basalt. Near auvergn¬ ose. Li 2 0 none Q 2.5 or 5.6 ab 21.0 an 33.9 di 14.1 hy 15.0 mt 6.7 il 0.6 Franklin Hill, Plumas County, California. G. Steiger. II. W. Turner, 17 A. R. U. S. G. S., I, p. 734, 1896. Olivine-basalt. Q 3.9 or 3.9 ab 21.0 an 32.2 di 9.2 hy 16.8 mt 8.1 il 2.3 Dardanelles, Stanislaus County, California. G. Steiger. 1 F. L. Ransome, B. U. S. G. S., 89, p. 58, 1898. Basalt. Not fresh. 14128— No. 14—03-19 290 CHEMICAL ANALYSES OF IGNEOUS ROCKS. CLASS II. DOSALANE—Continued. RANG 4. DOCALCIC. HESSASE—Continued. No. Si0 2 A1,0, Fe 2 G 3 FeO MgO C'aO Na 2 0 k 2 o h 2 o+ H 2 0- co 2 Ti0 2 P-A MnO BaO Sum Sp. gr. 31 47.27 20. 82 1.85 4. 26 6. 44 13. 02 2. 75 0. 22 1.27 0. 08 none 0. 92 0. 74 trace none 99. 86 Al. I .788 .204 .012 .059 .161 .233 .044 .002 .011 .005 — — 32 49.56 20. 09 2. 32 2. 02 7.01 15.62 1.63 0.34 2.25 100. 84 B3. IV .826 .197 .014 .028 .175 .279 .026 .003 33 50. 38 19. 83 6.05 2. 00 5.36 10. 03 2.15 1.76 1.37 none none 0. 38 100.14 A‘2. II .830 .194 .038 .028 .134 .178 .033 .019 — — .005 34 52. 62 21.77 2.13 3. 58 5. 68 10.19 2.39 0.25 0. 80 0. 04 0. 40 0.01 trace 99. 86 2. 970 A 2. 11 .877 .213 .013 .050 .142 .182 .039 .003 .005 — — 35 52. 20 16.10 3. 56 5. 68 6. 70 8. 58 2.40 0. 89 0. 60 0.01 2.60 0. 37 0. 22 none 99. 94 Al. I .870 .158 .022 .079 .168. .153 .039 .009 .033 .002 .003 36 52.00 21.61 3.01 4. 06 6. 53 8. 80 2.81 0.18 0. 35 — 0. 06 0.53 0.01 0. 05 100.00 3.066 A?2. II? .867 .212 .019 . 057 .163 . 157 .045 .002 .007 — .001 37 51.37 21. 79 3. 60 3. 38 6. 30 10. 36 2. 42 0.06 0. 50 0.10 0.32 trace 0.12 100.32 2. 996 A?2. II? . .856 .214 .022 .048 .158 .185 .039 .001 .004 — .002 38 52.8 17.8 1.2 4.8 4.8 12.9 • 3.0 0. 5 1.2 0.5 99.5 2.91 A3. Ill .880 .174 .007 .067 .120 .230 .048 .005 .006 39 53.50 22. 20 3. 60 2. 64 2. 00 9.45 4. 26 0. 61 1.50 0.45 0. 35 100.59 2. 800 A2. II .892 .218 .022 .037 .050 .169 .069 .006 .006 .005 40 53. 30 20. 99 1.66 6. 34 3.96 8.51 2. 46 0. 93 1.12 0. 32 0.10 99. 69 A3. Ill .888 .205 .010 .088 .099 .151 .040 .010 .001 41 52.60 17. 32 1. 72 12. 04 3. 25 7. 73 2. 62 1.49 1.16 0.14 0.15 100. 22 A3. Ill .877 .170 .011 .167 .081 .137 .042 .016 .001 42 49. 70 22.10 3.17 5. 95 4.97 9.31 2. 32 1.75 0. 75 100. 02 A3. Ill .828 .217 .020 .083 .124 .166 .,037 .019 43 49. 45 20.41 1.34 9. 51 5.34 9.96 2. 73 0. 20 0. 70 0. 32 99. 96 A3. Ill .824 .200 .008 .133 .134 .178 .043 .002 .004 44 49. 30 21.60 2. 28 7.26 7. 82 10. 20 2. 15 0. 29 0.10 101.00 2.97 B3. IV .822 .212 .014 .101 .196 .182 .035 .003 45 51.32 17. 84 4. 34 6. 70 4.18 9.51 3.01 1.52 1.98 100.50 A3. Ill .855 .175 .027 .092 .105 .169 .048 .016 46 47.97 22.16 1.12 4. 10 4. 58 11.96 3. 23 0. 29 2. 05 0.15 0. 44 1.14 99. 54 A2. II .800 .218 .007 . 057 .115 1 .213 .051 .003 .005 .008 47 45.94 21.16 2.21 7.14 7. 80 10. 49 3.21 1.14 1.02 100.11 2. 982 A3. Ill . 766 .207 .014 .099 .195 .187 .052 .012 DOSALANE-HESSOSE. 291 ORDER 5. PERFELIC. GERMANARE—Continued. SUBRANG 3. PRESODIC. HESSOSE—Continued. Inclusive. Norm. FeSo 0.20 or 1.1 di 12.9 C1063 trace ab 23.1 by 2.2 V.O* 0.02 an 43.9 ol 9.0 NiO none mt 2.8 SrO trace il 1.7 Li 2 0 none ap 1.7 Q 1.1 di 24.4 or 1.7 hv 7.7 ab 13.6 mt 3.2 an 46.7 S0 3 0.83 Q 3.8 di 7.7 Li.,0 trace or 10.6 hy 9.9 ab 17.3 mt 6.5 an 39.5 hm 1.6 S trace Q 5.3 hy 18.1 or 1.7 mt 3.0 ab 20.4 il 0.8 an 50.3 ZrO., none Q 8.0 di 9.4 Cl trace or 5.0 hv 15.9 FeS 2 0.03 ab 20.4 mt 5.1 CuO trace an 30.6 il 5.1 s . trace Q 4.3 hy 20.5 or 1.1 mt 4.4 ab 23.6 il 1.1 an 43.6 c 0.8 s trace Q 5.8 di 2.4 or 0.6 hy 17.6 ab 20.4 mt 5.1 an 48.4 il 0.6 Q 2.2 di 24.8 or 2.8 hy 7.0 ab 25.2 mt 1.6 an 33.6 il 0.9 Q 4.2 di 5.8 or 3.3 hy 3.4 ab 36.2 mt 5.1 an 39.8 il 0.9 Q 6.5 hy 20.2 or 5.6 mt 2.3 ab 21.0 an 42.0 c 0.4 Q 2.6 di 5.8 or 8.9 hy 25.7 ab 22.0 mt 2.6 an 31.1 or 10.6 di 1.1 ab 19.4 by 15.3 an 44.8 ol 3.6 mt 4.6 or 1.1 di 5.3 ab 22.5 hy 18.6 an 43.1 ol 6.4 mt 1.9 or 1.7 di 1.8 ab 18.3 by 20.4 an 48.4 oi 7.0 mt 3.2 Q 1.3 di 13.4 or 8.9 by 12.4 ab 25.2 mt 6.2 an 30.9 Fe3 2 0.35 or 1.7 di 5.0 ab 26.7 hv 7.7 an 45.6 ol 5.3 mt 1.6 il 0.8 ap 2.0 I or 6.7 di 7.3 ab 18.9 ol 18.8 an 39.8 mt 3.2 1 ne 4.5 Locality. Analyst. Beaver Creek, Tuolumne County, California. H. N. Stokes. Point Sal, Santa Bar¬ bara County, Cali¬ fornia. H. W. Fair¬ banks. Richmond Mountain, Eureka District, Nevada. J. E. Whitfield. Potaro River, British Guiana. Assistant of J. B. Harrison. Mazaruni District, British Guiana. J. B. Harrison. Essequibo River, British Guiana. Assistant of J. B. Harrison. Essequibo River, British Guiana. Assistant of J. B. Harrison. Druim an Eidhne, Island of Skye, Scotland. J. H. Player. Carrock Fell, Eng¬ land. G. Barrow. Eycott Hill, Lake District, England. J. Hughes. Eycott Hill, Lake District, England. J. Hughes. Vallee de Valbonne, Pyrenees, France. A. Pisani. Pallet, Loire Infer., France. A. Lacroix. Pallet, Loire Infer., France.. A. Pisani. Luciberg, Odenwald, Hesse. F. Kutscher. Oberbeerbach, Hesse. W. Sonne. Veitenfeld, Kreuz- E. v. Seyfried. berg, Rhongebirge. Reference. H. W. Turner, A. J. 8., VII, p. 297, 1899. H. W. Fairbanks, B. Dep. G.Un.Cal.,II, p. 50, 1896. Hague & Iddings, M. U. S. G. S.,XX, 1892. J. B. Harrison, Rep. G. Esseq. River, 1900, p. 63. J. B. Harrison, Priv. Contrib. J. B. Harrison, Rep. G. Esseq. River, 1900, p. 63. J. B. Harrison, Rep. G. Esseq. River, 1900, p. 64. Geikie and Teall, Q. J. G. S., L, p. 653, 1894. A. Harker, Q. V. G. S., L, p. 323, 1894. Ward, Micr. Jour., 1887, p. 246ff. Ward, Micr. Jour., 1887, p. 246ff. A. Lacroix, B. S. C. G. Fr., XI, No. 71, p. 31,1900. A. Lacroix, B. S. C. G. Fr., XI, No. 77, p. 23,1899. A. Lacroix, B. S. C. G. Fr., XI, No. 77, p. 23,1899. C. Chelius, Nbl. Ver. Erdk., XIII, p. 10, 1892. C. Chelius, Nbl. Ver. Erdk., XVIII, p. 24, 1897. E.v. Sevfried, cf. N. J., 1898, II, p. 61. Author’s name. Gabbro. Gabbro. Basalt. Diabase. Diabase-gabbro. Diabase. Diabase. Gabbro. Quartz-gabbro. Lava. Lava. Mica-diorite. Gabbro. Gabbro. Luciite. Gabbro. Basalt. # Remarks. A1 2 0 3 high? Dried at 110°. A1 2 0 3 high? Ti 2 0 and MgO low? Dried at 110°. Near marylan- dose. Dried at 110°. A1 2 0 3 high? Ti 2 0 and MgO low? Dried at 110°. A1 2 0 3 high? Ti0 2 and MgO low? “ Light band.” One decimal. Cf. J. J.H.Teall. Br. Petr.,p. 228, 1888. A1 2 0 3 high? Cf. J. J.H.Teall, Br. Petr., p. 228, 1888. Sum high. A1 2 O s high? 292 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS II. DOSALANE—Continued. RANG 4. DOCALCIC. HESSASE—Continued. No. SiO, AlA Fo,0 3 FeO MgO CaO Na 2 D k 2 o h 2 o+ ILO- C0 2 Ti0 2 1‘A MnO BaO Sum Sp. gr. 48 49. 94 18. 86 1.47 7.12 5. 61 8.54 2.50 1.62 2. 77 0. 23 0. 63 99. 29 2. 88 B3. IV .832 . 185 .009 .099 .140 .152 .040 .017 .009 49 49. 46 19. 82 5. 69 5. 82 1.93 10.62 3.38 0. 71 0. 06 0.31 1.88 99. 68 A3. Ill .824 .195 .035 .080 .047 .189 .055 .008 .023 50 49. 95 19.17 4. 72 6. 71 5.03 9. 61 3.13 0. 74 0.09 0. 69 trace 99.84 2. 939 A3. Ill .833 .188 .029 .093 .126 .171 .050 .007 .009 — 15° 51 50. 56 17. 67 1.04 8. 79 4. 77 8.25 3.23 0. 93 0.19 0. 20 2. 43 0. 34 0. 25 99. 21 Bl. II .843 .173 .006 .122 .119 .147 .052 .010 .030 .002 .004 52 49.13 18. 48 0. 41 11.69 5. 77 7. 42 3. 08 1.09 0.07 0. 06 1.61 0. 34 0.15 99. 53 Al. I .819 .181 .003 .162 .144 .132 .050 .012 .020 .002 .002 53 49. 05 19.84 3.46 8. 62 2.51 8. 95 2. 92 0. 53 2. 34 1.96 0.21 100. 44 A2. II .818 .194 .022 .120 .063 .160 .047 .006 .024 .002 54 52. 03 20.57 1.60 6.97 5. 39 7.80 2. 37 1.34 1.27 0. 26 99. 60 2. 855 A3. Ill . 867 .201 .010 .097 .145 .139 .039 .014 RANG 5. PERCALCIC. CORSASE. 1 44.04 20. 01 4. 22 8. 61 5. 01 11.68 1.24 0.15 1.90 0.11 none 2. 24 0. 52 0. 28 none 100. 42 Al. I .734 .196 .026 .120 .125 .209 .020 .002 .028 .003 .004 — 2 43. 41 23.15 3. 72 4. 39 7. 65 14.27 0. 82 0. 22 1.53 0.18 0.10 0.39 0. 02 0.08 none 100. 09 Al. I .724 .226 .023 .061 .191 .255 .013 .002 .005 — .001 — 3 42. 92 26. 42 3. 97 2. 81 7. 26 15.40 0. 63 trace 0. 80 100. 21 A3. Ill .715 .259 .025 .039 .182 .272 .009 — CLASS II. DOSALANE. RANG 1. PERALKALIO. LAURDALASE. 1 51.75 14. 52 5.08 3. 58 4. 55 7.04 2. 93 7.61 2. 25 0. 23 0.18 trace 0. 30 100.14 Al. I .863 .142 .035 .050 .114 .126 .047 .081 .003 .001 — .002 RANG 1. PERALKALIO. LAURDALASE. 1 53. 09 21.16 1. 89 2. 04 0. 32 3.30 6. 86 8.42 1. 13 0. 24 0. 82 0.11 0.15 0. 20 0. 61 100. 48 2. 599 Al. I .885 .198 .012 .028 .008 .059 .ill .089 .001 .001 .003 .004 26° 2 52.91 19. 49 4. 78 2. 05 0. 29 2. 47 7.13 7.88 1.19 none none trace 0. 44 100. 25 Al. I .882 .191 .030 .029 .007 .045 .114 00 -o — — .006 3 57. 63 17.53 3. 46 1.18 0. 22 1.35 5. 80 9.16 3. 22 0. 23 trace trace 99. 86 A2. II .961 .172 .022 .016 .006 .024 .094 .098 .003 — — DOS ALANE-JU DITHOSE. 293 ORDER 5. PERFELIC. GERMANARE—Continued. ? SUBRANG 3. PRESODIC. HESSOSE—Continued Inclusive. Norm. or 9.5 di 5.6 ab 21.0 by 18.8 an 35.6 ol 3.2 mt 2.1 Q 3.4 di 12.8 f or 4.4 hv 1.4 ab 28.8 mt 8.1 an 36.7 il 4.5 Q 0.4 di 9.2 or 3.9 hy 15.5 ab 26.2 mt 6.7 an 36.4 il 1.4 Cl 0.11 Q 0.4 di 8.3 s 0.20 or 5.6 by 19.3 X 0.25 ab 27.2 mt 1.4 an 30.9 il 4.5 Cl 0.08 or 6.7 di 3.1 s 0.15 ab 26.2 by 11.3 an 33.1 ol 14.6 mt 0.7 il 3.1 Fe (met) 0.04 Q 3.7 di 4.6 or 3.3 hy 13.8 ab 24.6 mt 5.1 an 39.2 il 3.7 Q 2.3 by 25.5 or 7.8 mt 2.3 ab 20.4 an 38.6 c 0.9 Locality. Prisednice, n. Zbirov, Bohemia. Ditro, Siebenburgen, Hungary. Near I vrea, Piedmont. Goroschki, Yolhynia, Russia. Gaskowskaia Rudnja, Volhynia, Russia. Rowno, Yolhynia, Russia. Dargo, Victoria. Analyst. Reference. Author’s name. Remarks. F. Schulz. F. Slavik, cf. N. J., 1901,1, p. 63. Mica-diabase. Sum low. J. v. Szadec- zky. J. v. Szadeczky, cf.N. J.,1901,I,p. 402. Camptonite. A1 2 0, high? MgO low? M. Dittrich. F. R. Van Horn, T. M. P. M., XVII, p. 404,1898. Norite. W.Tarassenko. W. Tarassenko, cf.N. J., 1899,1,p.463. Olivine-norite. Sum low, due to h 2 o+ W.Tarassenko. W. Tarassenko, cf. N. J., 1899,1,p. 463. Olivine-norite. S. Pfaffius. A. Lagorio, T. M.P. M. f VIII, p. 480,1887. Basalt. Iron bearing. A1 2 0 3 high? MgO low? A. W. Howitt. A. W. Howitt, cf.N. J., 1889,1, p. 121. Quartz-diorite. SUBRANG. NOT NEEDED. ZrO.) FeS 2 Cr./) ;! V.,0 !( NiO SrO 0.10 0.25 none 0.05 0.01 none Q 2.1 di 5.9 or 1.1 hy 18.6 ab 10.5 mt 6.0 an 48.4 il 4.3 ap 1.1 Stone Run, Cecil County, Maryland. W. F. Hille- brand. A. G. Leonard, B. U. S. G.S.,168, p.45,1900. Diorite. Not described. Cl FeSo Cr..d 3 NiO SrO LioO trace 0.14 none none none trace or 1.1 di 9.9 ab 6.8 hy 7.1 an 58.7 ol 8.2 mt 5.3 il 0.8 ab 4.7 di 5.6 an 69,5 hy 7.0 ol 6.6 mt 5.8 Phoenix Reservoir, Tuolumne County, California. Talaya, Ural Moun¬ tains, Russia. H. N. Stokes. L.-Lessing and Kultacheff. H. W. Turner, J.G., VII, p.150,1899. Loewinson-Lessing, G. S. K. Jushno-Saos., 1900, p. 166. Qlivine-gabbro. Pyroxene- granulite. (gabbro). ORDER 6. LENDOFELIC. NORGARE. SUBRANG 2. DOPOTASSIC. PERGUSOSE. S0 3 trace Cl 0.05 SrO 0.07 or 45.0 di 24.7 ab 3.1 ol 1.2 an 3.9 mt 8.3 ne 11.6 Shonkin Creek, High- wood Mountains, Fergus County, Montana. E. B. Hurlbut. L. V. Pirsson, B. U. S. G.S., 148, p. 154, 1897. Pseudoleucite- syenite. SUBRANG 3. SOD1POTASSIC. JUDITHOSE. Zr0 2 0.04 or 49.5 di 5.8 so 3 none ab 6.3 WO 4.1 Cl 0.02 ne 27.8 mt 2.8 s 0.08 X 0.48 or 46.7 ac 3.2 Cl 0.53 ab 8.4 di 3.2 s 0.52 ne 27.8 WO 3.7 SrO 0.09 mt 5.3 Li a O trace Cl 0.08 or 54.5 ac 9.2 Li 2 0 trace ab 7.9 di 5.2 ne 22.4 mt 0.5 Diamond Jo Quarry, H. S. Washing- Magnet Cove, Ar- ton. kansas. Neasch’s Gulley, Mag¬ net Cove, Arkansas. J. F. Williams. H. S. Washington, J. G. IX, p. 611,1901. J. F. Williams, A. R. Ark. G. S.,1890, II, p. 287, 1891. Cone Butte, Judith Mountains, Mon¬ tana. L. X. Pirsson. Weed and Pirsson, A. J. S., II, p. 192, 1896. Foyaite. Leucite- tinguaite. Tinguaite. Cf. No.4, laurda- lose. Cl high? Also in 18 A. R. U.S. G. S. Ill, p. 569, 1898. 294 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS II. DOSALANE—Continued. RANG 1, PERALKALIC. LAURDALASE—Continued. No. Si0. 2 AlA Fe 2 0 3 FeO MgO CaO Na 2 G k 2 o h 2 o+ H 2 0- co 2 Ti0 2 p 2 o 5 MnO BaO Sum Sp. gr. 4 57. 46 15. 40 4. 87 0. 87 1.37 2.59 5. 48 9. 44 0. 82 .009 0.13 0. 60 0. 21 trace 0. 60 100.42 0. 05 Al. I .958 .151 .030 .012 .034 .046 .088 .100 .008 .002 — .004 100.37 5 5J.94 15. 78 4. 07 3.17 3. 48 6. 04 3. 44 7.69 2.17 0. 39 0.59 trace 0.42 99. 83 Al. I .866 . 155 .025 .044 .087 .108 .055 .082 .005 .004 — .003 6 56. 06 20. 10 3. 82 n. d. 0. 83 2. 53 7.50 8. 78 1.18 100. 80 At. IV .934 .197 (.017) (.014) .021 .046 .121 .093 RANG 1. PERALKALIC. LAURDALASE. 1 53. 74 14.02 10. 63 1.71 1 Trace. 1.18 9.02 4. 77 3. 40 0. 36 100. 96 B2. Ill .896 .137 . 066 .024 .021 .145 .051 .005 2 52. 53 18.31 0. 34 6. 43 1.82 3.15 7.26 6.47 1.16 1.59 0.15 99.93 .22 A2. II . 876 .179 .002 .089 .046 .056 .117 .069 .011 .002 99.71 3 54. 04 20. 27 4. 66 0. 64 0.16 2. 75 8.56 6. 79 1.93 99. 80 A3. Ill .901 .198 .029 .009 .004 .049 .138 .072 4 53.38 20. 22 1.56 1.99 0. 29 3. 29 7. 89 6. 21 3. 43 trace 100.03 A3. Ill .890 .198 .010 .028 .007 .059 .127 .066 — 5 54.42 20. 76 2.64 1.33 0.22 1.34 10.41 4. 89 2. 50 0. 22 0. 40 0.11 0.15 0. 04 99. 82 2.559 Al. I .907 .203 .016 .018 .006 .024 .168 .053 .005 .001 .002 19.5° 6 ' 47.61 14. 26 4. 90 4. 07 2. 62 8. 71 6. 70 4. 08 1. 89 0. 26 1.38 1.38 0. 30 0. 41 100.68 2. 79 Al. I .793 .140 .031 . 057 .066 . 155 .108 .043 .017 .010 .004 .003 25° 7 55. 90 19. 00 2. 05 2.54 1.10 3.12 8. 49 5. 41 n.d. 1.45 0. 28 99.34 2. 642 A2. II .932 .186 .013 .035 .028 .056 .137 .058 .018 .004 8 59. 88 17.87 2.67 1.50 1.04 2. 01 7. 96 5.69 0. 90 0. 85 0.32 trace 100. 69 A2. II .998 .175 .017 .021 .026 .036 .128 .061 .011 .002 9 56. 58 19. 89 3.18 0. 56 0.13 1.10 10. 72 5. 43 1.77 0.47 99. 83 A3. Ill .943 .195 .020 .008 .003 .020 .173 .058 .007 10 55. 65 20. 06 3. 45 1.25 0. 78 1.45 8. 99 6. 07 1.51 99.21 B3. IV .928 .197 .022 .017 .020 .026 .145 .065 11 56. 35 19. 85 1.91 2. 03 1.17 2. 60 8. 89 5.31 0. 70 1.00 0. 67 0. 20 100. 68 A2. II .939 .195 .012 .028 .029 .046 .143 .056 .012 .005 .003 12 55.18 17. 44 5.56 1.36 0. 27 5.10 6. 83 5. 48 0. 88 2.38 100. 48 A3. Ill .920 .171 .035 .019 ,007 .091 .110 .058 .030 . 13 54. 55 19.07 2.41 3.12 1.98 I 3.15 7. 67 4. 84 0. 72 1.40 0.74 0.17 99.82 A2. II .909 .187 .015 .043 050 1 .056 .124 .051 .017 1 .005 .002 DOSALANE—LAURDALOSE. 295 ORDER 6. LENDOFELIC. NORGARE—Continued. SUBHANG. SODIPOTASSIC. JUDITHOSE—Continued. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. S0 3 0.13 or 55.6 ac 13.9 Bean Creek, Bearpaw II. N. Stokes. Weed and Pirsson, Tinguaite. Cl 0.20 F trace ab 5.8 di 8.0 ne 9.9 wo 1.0 Mountains, Mon- A. J. S., II, SrO 0.16 so 2.9 il 1.2 tana. p. 192, 1896. Li«0 trace S0 3 0.29 or 45.6 di 16.9 Shonkin Creek, High- W. M. Bradley. L. V. Pirsson, Trachyte. Cl 0.08 SrO 0.28 ab 9.4 ol 1.8 an 5.0 mt 5.8 wood Mountains, B. U. S. G. S., 148, ne 7.1 il 0.8 Montana. p. 152, 1897. no 2.8 ap 1.4 or 51.7 ac. 7.9 Serra de Tingua, E. Hussak. E. Hussak, Foyaite. ab 2.6 di 8.0 ne 28.1 wo 1.3 Brazil. . N. J., 1892, II, p. 146. SUBRANG 4. DOSODIC. LAURDALOSE. Zr0 2 2.13 or 28.4 ab 16.8 ne 15.3 Z 3.1 ac 27.3 di 4.7 mt 4.6 | Kangerdluarsuk, Greenland. N. Y. Ussing. H. Rosenbusch, Elemente., p. 126, 1898. Lujaurite. Near judithose. Sum high. Cl F 0.40 0.32 or 38.4 ab 21.5 ne 15.3 so 5.3 di 2.9 ol 11.0 mt 0. 5 ap 3.6 ft 0.8 Alton Township, Clin¬ ton County, New York. E. W. Morley. H. P. Cushing, B. G. S. A., IX, p. 248, 1898. Syenite- porphyry. Near judithose. or 40.0 ab 15.2 ne 27.5 ac 5.6 di 0.9 wo 5.2 mt 2.1 hm 1.1 Neasch’s Gulley, Mag¬ net Cove, Ar¬ kansas. R. N. Brackett. J. F. Williams, A.R. Ark. G. S., 1890, II, p. 287, 1891. Leucite- tinguaite. FeSo 1.77 or 36.7 ab 19.9 an 1.4 ne 25.5 di 6.0 wo 3.3 mt 2.3 pr 1.8 Diamond Jo Quarry, Magnet Cove, Arkansas. Brackett and Smith. J. F. Williams, A. R. Ark. G. S. 1890, II, p. 238, 1891. N e p h e 1 ite- syenite. Not fresh? Cf. No. 1, judithose. Zr0 2 Cl s Cr 2 0 3 NiO SrO 0.15 0.23 0.01 none none trace or 29.5 ab 23.6 ne 30.4 ac 7.4 di 4.9 wo 0.6 il 0-8 Between Black and Big Mountains, Uvalde County, Texas. W. F. Hille- brand. W. Cross, B. U. S. G. S., 168, p. 62, 1900. Phonolite. Zr0 2 SO :( Cl F S Cr s 0 3 NiO SrO Li 2 0 0.18 1.17 0. 37 trace 0.03 trace trace 0.36 trace or 23.9 ab 19. 9 an 2.5 ne 1.4 so 10.6 no 4.9 di 16.7 wo 4.2 mt 7.0 il 2.6 ap 3.3 Two Buttes, Colorado. W. F. Hille- brand. W. Cross, B. U. S. G. S., 148, p. 182, 1897. Tinguaite? or 32.2 ab 26.2 ne 22.2 ac 4.2 di 7.8 wo 2.5 mt 0.9 il 2.8 Foia, Portugal. G. Pajkull. K.-Koschlau and Hack- man, T. M. P. M., XYI, p. 262, 1896. Miea-tinguaite. or 33.9 ab 36. 7 ne 12.5 ac 6.5 di 7.8 mt 0.7 il 1.7 Sundet, Asrum Lake, Norway. V. Schmelek. W. C. Brogger, Eg. Kg., Ill, p. 190, 1899. Hedrumite. or 32.2 ab 25.7 ne 25.0 or 36.1 ab 22.0 ne 25.6 ac 9.2 ns 2.0 di 2.8 wo 0.-8 ac 6.0 di 6.1 mt 2.1 Hedrum, Laugendal, Norway. Hedrum, Laugendal, Norway. G. Pajkull. V. Schmelek. IV. C. Brogger, Z. K., XVI, p. 41, 1890. W. C. Brogger, Eg. Kg., 1, p. 191, 1894. Tinguaite. Tinguaite. Border of dike. Cf. No. 10. Also in Eg. Kg. I, p. 113,1894. Center of dike. Cf. No. 9. Sum low. or 31.1 ab 32.0 ne 22.2 ac 1.8 di 7.0 ol 0.4 mt 1.9 il 1.8 ap 1.6 Pollen, Farrisvand, Laugendal, Norway. Y. Schmelek. W. C. Brogger, Eg. Kg., Ill, p. 19, 1899. Laurdalite. or 32.2 ab 34.1 an 0.8 ne 12.8 di 1.5 wo 8.3 il 2.9 hm 5.6 pf 1.4 Sandefjord, Hedrum, Norway. G. Pajkull. W. C. Brogger, Z. K., XVI, p. 31, 1890. Mica-syenite. MgO low? Cat) high? or 28.4 ab 34.0 an 3.3 ne 16.8 di 6.0 ol 2.5 mt 3.5 il 2.6 ap 1.7 Love, Laugendal, Norway. Y. Schmelek. W. C. Brogger, Eg. Kg., Ill, p. 19, 1899. Laurdalite. CHEMICAL ANALYSES OF IGNEOUS ROCKS. 296 CLASS II. DCSALANE—Continued. RANG 1. PERALKALIC. LAURDALASE—Continued. No. SiO, A1.A FeA FeO MgO CaO Na 2 0 K 2 0 HAf H 2 0- C0 2 TiO, PA MnO BaO Sum Sp. gr. 14 53.81 19. 69 6. 20 3. 63 0.85 1. 73 7. 77 4. 58 1.52 99. 78 • A3. Ill .897 .193 .039 .050 .021 .031 . 125 .049 15 51. 95 14. 95 4.09 5. 70 3.54 6.10 5. 43 4.45 1.10 1.95 1.15 0. 30 100. 71 A2. II . 866 .147 .026 .079 .089 .109 .088 .Q47 .024 .008 .004 16 45.16 15. 26 9. 57 4. 99 3.18 2. 87 6.57 3. 87 n. d. 6. 98 1.54 0.63 100.62 A2. II . 753 .150 .060 .069 .080 .051 .106 .041 • *• . 085 .011 .009 17 50. 26 20.15 3. 67 2.62 1.43 3.28 8.09 4. 67 3.85 0.24 0. 05 trace 100.18 Al. I .838 .198 .023 .036 .036 .058 .130 .050 .003 — — 18 53. 00 16. 47 5. 29 3. 10 0. 63 4.15 7. 21 5.09 1.68 0.72 : 3.20 trace trace 0.37 100. 91 2.527 B2. Ill .883 .161 .033 .043 .016 .074 .116 . 055 — — .005 19 55.10 19. 25 2. 77 1. 66 0. 83 5.14 7.41 4. 68 2.19 0.40 j 0.22 0. 48 0.41 0. 32 100. 86 2. 544 A2. II .918 .189 .017 .023 .021 .092 .120 .050 .006 .003 .005 20 57.81 18. 74 5. 76 0. 42 trace 1.28 9.35 4.52 1.50 trace ; . 99. 38 2. 64 B3. IV .964 .184 .036 .005 — .023 .151 .048 — 21 53. 73 20. 35 3. 74 2.13 0. 47 2. 72 7. 94 6. 05 2. 02 0. 09 0.51 99.98 A2. II .896 .199 .023 .030 .012* .048 .128 .065 .001 .007 22 60. 41 17. 44 1.98 1.78 1.85 2. 79 7.51 5. 64 0. 51 99. 91 A3. Ill 1.007 .171 .013 .025 .046 .050 .121 .060 RANG 2. DOMALKALIC. ESSEXASE. 1 51.35 20.21 4. 90 n. d. 1.53 5. 75 4.43 6.68 n. d. 0.80 0.28 100. 04 A3. Ill .856 .198 .031 (.062) .039 .103 .071 .071 .010 .002 2 49. 70 18. 45 3. 39 4. 32 2. 32 7.91 5.33 4. 95 1.09 0. 25 1.33 0. 40 trace 99. 44 A2. II .828 .181 .021 .060 .058 .141 .086 .053 .017 .003 — 3 52. 05 15. 02 2. 65 5.52 5. 39 8.14 3.17 6.10 0.35 0.47 0.21 trace 0. 42 100. 03 Al. I .868 .147 .017 . 076 .135 .145 .051 .065 .006 .002 — .003 4 50.11 17.13 3. 73 3. 28 2. 47 5.09 3. 72 7. 47 4. 47 0. 82 0. 67 trace 0.63 100. 09 Al. I .835 . 168 .023 .046 . 062 .091 .059 .080 .010 .005 — .004 5 47.8 20.1 6. 7 0.8 1. 1 5.4 5. 5 7.1 2.4 0. 7 0.8 0.8 99.3 B2. Ill .797 .197 .042 .011 .028 .096 .089 .075 .009 .011 .005 6 51.02 18. 63 3.14 0. 84 1.02 7. 89 4.13 6.08 1.10 4. 53 trace 0.16 0. 59 99. 66 2. 480 Al. I .850 .183 .020 .011 .026 .141 .066 .065 — .001 .008 7 50. 24 20. 09 2.54 5. 65 3. 65 7.83 2. 97 7. 45 0.36 trace 100. 78 A3. Ill .837 .197 .016 .079 .091 .140 .048 .079 DOSA LANE—BOR( )LAN( >SE. 297 ORDER (5. LENDOFELIC. NORGARE—Continued. SUBRANG 4. DOSODIC. LAURDALOSE—Continued. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. or 27.2 ab 36.7 an 5.3 ne 15.6 di ol mt 2.7 1.9 9.0 Stoksund, Norway. G. Forsberg. W. C. Brogger, Z. K., XVI, p. 116, 1890. Syenite- pegmatite. or 26.1 ab 28.3 an 3.3 ne 9.7 di ol mt il ap 16.8 3.2 6.0 3.7 2.7 Had, Langesund Fjprd, Norway. V. Schmelck. W. C. Brogger, Eg. Kg., Ill, p. 139, 1899. • Soda-minette. or 22.8 ab 32. 0 an 0.8 ne 12.8 ol il hra Pf ap 5. 6 10.6 9.6 1.6 3.6 Lysebofjord, Norway. P. Schei and L. Schmelck. W. C. Brogger, Eg. Kg., Ill, p. 19, 1899. Olivine- laurdalite. H,0 n. d. TiO a high? so 3 X 0.16 0.75 or 27.8 ab 21.0 an 5.0 ne 25.6 di ol mt il 9.0 0.4 5.3 0.5 Alno, Sweden. P. Jannasch. H. Rosenbusch, Element e, p. 215, 1898. Tinguaite. so 3 Cl none none or 30.6 ab 25.2 ne 17.6 ac di wo mt 4.6 8.4 4.4 5.3 Near Topkowitz, Bohemia. F. Hanusch. J. E. Hibsch, T. M. P. M., XIX, p. 33, 1900. Tinguaite- porphyry. Not fresh. or 27.8 ab 32.5 an 6.3 ne 16.5 di wo mt il 4.5 6.1 3.9 0.9 Madstein, n. Nesch- witz, Bohemia. F. Hanusch. J. E. Hibsch, T. M. P. M., XIV, p. 98, 1894. Sanidine- phonolite. or 26.7 ab 41.9 ne 15.9 ae wo mt hm 6.9 2.7 1.2 2.6 Edda Gijorgis, Abyssinia. G. T. Prior. G. T. Prior, Min. Mag., XII, p. 269, 1900. Tinguaite. Sum low. Cl 0.23 or 36.1 ab 23.1 an 1.7 ne 23.9 di wo mt 4.4 2.7 5.3 Near Renseburg, Zwartkopjes, Transvaal. E. A. Wiilfing. E. A. Wiilfing, N. J., 1888, II, p. 32. Nephelite- syenite. Near miaskose or 33.4 ab 36.2 ne 11.9 ac di ol mt 4.6 11.5 1.2 0.7 Tongging, Toba Lake, Sumatra. W. Herz. L. Milch, Z. D. G. G., LI, p. 70, 1899. Trachyte- andesite. Alkalies high? SUBRANG 3. SODIPOTASSIC. BOROLANOSE. so 3 Cl FeS 2 0.04 0.06 4.01 or 39.5 ab 7.3 an 15.6 ne 16.2 di ol il pr 11.0 4.7 1.5 4.0 Near Dr. Thornton’s, Magnet Cove, Arkansas. W. A. Noyes. J. F. Williams, A. R.Ark.G. S.,1890, II, p. 263, 1891. Nephelite- felsite. or 29.5 ab 10.5 an 11.7 ne 18.7 di wo mt il ap 18.4 0.8 4.9 2.6 1.0 Schoolhouse, Magnet Cove, Arkansas. H. S. Wash¬ ington. H. S. Washington, B. G. S. A., XI, p. 399, 1900. Shonkinite (covite). Complete in J. G. IX, p. 612, 1901. S0 3 Cl SrO 0.02 0.24 0.28 or 36.1 ab 6.3 an 8.6 ne 11.1 di ol mt il 25.8 5.9 3.9 0.9 Middle Peak, High wood Moun¬ tains, Montana. E. B. Hurlbut. L. V. Pirsson, B. U. S. G. S., 148, p.154,1897. Monzonite. Near monchi- quose. so 3 Cl SrO 0.08 0.07 0.35 or 44.5 ab 9.4 an 8.1 ne 11.6 di ol mt il ap 10.6 2.9 5.3 1.5 1.6 Palisade Butte, Highwood Moun¬ tains, Montana. II. W. Foote. L. V. Pirsson, B. U. S. G. S.,148, p.153,1897. Syenite. • so 3 0.4 or 41.7 ab 1.6 an 9.2 ne 24.4 di wo mt il hm 6.0 4.1 0.7 1.4 6.2 Lake Borolan, Sutherland, Scot¬ land. J. II. Player. Horne and Teall, Tr. R. Soc., Edin., XXXVi, Pt, I, p.178,1893. Borolanite. One decimal. Sum low. so 3 Cl F Cr 2 0 3 Cu 0.29 0.09 trace trace 0.15 or 36.1 ab 14.1 an 14.5 ne 11.1 di wo mt hm 5.6 7.4 2.6 1.4 Gennersbohl, Hegau. G. F.'Fohr. G. F. Fohr, In. Diss. Wurzburg, p. 24,1883. Phonolite. ' or 28.4 an 19.5 le 12.2 ne 13.6 di ol mt 16.1 6 . a 3.7 Monte Cavallo, n. Orvieto, Italy. H. S. Washing¬ ton. H. S. Washington, J. G., V, p. 370, 1897. Leucite- tephrite. Near subrang 2 of essexase. 298 CHEMICAL ANALYSES OF IGNEOUS ROCKS. CLASS II. DOSALANE—Continued. RANG 2. DOMALKALIC. ESSEXASE. No. Si0 2 ai 2 o 3 FeA EeO MgO CaO Na 2 0 K.,0 H 2 0+ H 2 0- co 2 Ti0 2 PA MnO BaO Sum Sp. gr. 1 48. 98 17. 76 2.14 6.52 2. 09 8. 36 6. 77 2. 08 4. 50 0. 82 0.56 100. 58 A3. Ill .816 .174 .013 .090 .052 .149 .109 .022 .007 2 47.94 17. 44 6. 84 6.51 2. 07 7. 47 5. 63 2. 79 2. 04 0. 20 1.04 99. 92 A2. II .799 .171 .043 .090 .052 .133 .091 .030 .003 .007 3 46. 99 17. 94 2. 56 7.56 3.22 7.85 6. 35 2. 62 0. 65 2. 92 0.94 trace none 99.60 2. 919 A2. II .783 .176 .016 .105 .080 .140 .102 .029 • .036 .006 — — 12 ° 4 48. 23 17.43 2. 77 5. 92 2. 99 6. 38 6. 87 2. 78 2. 84 0. 54 2. 00 0.69 0.18 0. 08 99.97 2. 742 Al. I .804 .171 .017 .082 .075 .114 .111 .030 . 025 .005 .003 .001 23° 5 51.03 18. 48 11.95 3.21 6. 34 6. 96 5. 42 4.83 1.68 100.94 2.86 A3. Ill . 851 .181 .075 .044 .159 .124 .087 .051 09 100.85 6 47. 67 18. 22 3.65 3.85 6. 35 8.03 . 4.93 3. 82 2.97 0.38 0. 28 100.15 A3. Ill .795 .179 .023 .053 .159 .143 .080 .041 .004 7 52. 83 17. 67 7.50 1.68 2. 47 7. 35 6. 61 2. 52 2.32 100. 95 B3. IV .881 .173 .047 ,023 .062 1.31 .107 .027 8 46. 39 19. 03 9. 79 0. 96 5.33 7. 02 5. 47 2. 47 2.04 0. 26 0. 72 0. 88 101.21 2. 779 B2. Ill .773 .187 .061 .013 .133 .125 .088 .026 .009 .006 9 55.11 20. OS' 2.30 3.87 1.67 ( 5.06 7. 88 3.16 0. 59 .. \ 99. 72 A3. Ill .919 .197 .014 .054 .042 .090 .127 .034 10 55. 07 19.57 3. 38 3. 42 1.68 5. 56 7.10 3. 34 0. 38 99. 50 A3. Ill .918 .192 .021 .048 .042 .100 .114 .035 11 51.90 22. 54 4. 03 3.15 1.97 3.11 8.18 4. 72 0. 22 99.82 A3. Ill .865 .221 .025 .044 .049 . 056 .114 .050 12 48. 46 16.81 1.46 9. 14 4. 44 6.14 6.31 2.33 0. 59 1.28 3. 05 0. 67 trace 100. 68 A2. II .808 .165 .009 .127 l.ll .110 .102 .025 .038 .005 — 13 51.91 19. 58 6. 39 2. 30 0. 54 5.50 7. 70 3,32 0. 50 trace 1.56 0. 72 trace trace 100. 02 2. 715 A2. II .865 .192 . .040 .032 .014 .098 .124 .034 .020 .005 — — 14 50. 50 17. 71 5.41 4. 02 3. 33 7.91 5. 52 3. 02 0. 45 1.91 0. 92 100. 70 2. 855 A2. II .842 .174 .034 .056 .083 .141 .089 , .032 .023 .006 15 49. 90 19. 89 2.55 4. 78 5. 05 7.21 5.60 3. 74 0.19 0.13 0. 93 trace trace 99.97 A2. 11 .832 .195 .016 .066 .126 .129 .090 .040 .011 — — 16 48. 35 19. 94 2. 48 5. 25 5.15 7. 98 5. 47 3. 99 0. 22 0.16 0.12 0. 84 trace 99.95 A2. II .806 .195 .016 •° 7S .129 .142 l .088 .042 4 .002 .006 DOS A LANE-ESSEXOSE. 299 ORDER 6. LENDOFELIC. NORGARE—Continued. SUBRANG 4. DOSODIC. ESSEXOSE. Inclusive. Norm. Locality. or 12.2 di 24.8 ab 21.0 ol 1.4 an 12.0 mt 3.0 ne 19.6 il 1.1 or 16.7 di 14.3 ab 25.7 ol 3.1 an 13.9 mt 9.9 ne 11.9 ap 2.3 or 16.1 di 17.7 ab 17.3 ol 4.5 an 12.5 mt 3.7 ne 19.6 il 5.5 ap 1.9 Zr0 2 0.04 or 16.7 di 15.9 Cl 0.03 ab 23.6 ol 3.7 S 0.08 an 8.3 mt 3.9 Cr 2 0 3 none ne 18.7 il 3.7 v 2 o 3 0.04 ap 1.7 NiO trace SrO 0.08 so 3 0 .6/ or 28.4 >di 14.7 Cl 0.37 ab 13.6 ol 6.4 an 15.6 mt 10.2 ne 6.0 hm 5.0 so 5.0 no 4.6 or 22.8 di 19.2 ab 6.8 ol 7.3 an 16.1 mt 5.3 ne 19.0 or 15.0 di 13.4 ab 35.6 wo 3.5 an 10.8 mt 5.3 ne 11.1 hm 3.8 so 3 0.47 or 14.5 di 9.1 Cl 0.38 ab 24.1 ol 6.4 an 17.5 mt 0.9 ne 11.9 il 1.4 hm 9.1 ap 2.0 or 18.9 di 12.6 ab 35.1 ol 2.4 an 10.0 mt 3.2 ne 17.0 - or 19.5 di 13.1 ab 36.2 ol 0.8 an 12.0 mt 4.9 ne 12.8 or 27.8 ol 5.4 ab 25.2 mt 5.8 an 15.6 ne 18.7 or 13.9 di 13.1 ab 26.2 ol 10.2 an 10.6 mt 2.1 ne 11.8 il 5.8 ap 1.6 Cl trace or 18.9 di 3.1 S trace ab 37.2 wo 3.9 Cr*>0 3 trace an 9.5 mt 2.8 SrO trace ne 15.1 il 3. 1 Li 2 0 trace hm 4.5 ap 1.7 or 17.8 di 15.8 ab 21.0 ol 2 .5 an 14.7 mt 7.9 ne 13.9 il 3.5 ap 2.0 or 22.4 di 14.8 ab 13.6 ol 7,6 an 18.1 mt 3.7 ne 18.2 il 1.7 or 23.4 di 13.4 ab 8.9 ol 10.1 an 18.1 mt 3.8 ne 20.1 ap 1.8 St. John, New Bruns¬ wick. Salem Neck, Essex County, Massachusetts. Salem Neck, Essex County, Massachusetts. Near Big Mountain, Uvalde County, Texas. Three Peaks, Crazy Mountains, Montana. Liftuaugu v » Crazy Mountains, Montana. Analyst. Reference. Author’s name. Remarks. W. D. Matthew. M. Dittrich. H. S. Washing¬ ton. W. F. Hille- brand. A. M. Comey. G. Schneider. Sunium Point, Car- J. Posada, melo Bay, Cali¬ fornia. Ferrera, Columbretes R. Pfohl. Islands, Spain. Stoksund, Norway. G. Forsberg. Stoksund, Norway. G. Forsberg. Norway Brathagen, Laugen- dal, Norw’ay. Kauling, Rhonge- birge. Rongstock, Bohemia. G. Forsberg. O. N. Heiden- reich. M. Scheldt. Ilermos River, Kula, Asia Minor. Well Digging, Kula, Asia Minor. R. Pfohl. H. S. Washing¬ ton. II. S. Washing¬ ton. W. D. Matthew r , Tr. N. Y. Acad., XIV, p. 213, 1895. Diorite-por- phyrite. II. Rosenbusch, | Essexite. Elemente, p. 172,1898. H. S. Washington, J.G., VII, p. 57, 1899. W. Cross, B. U. S. G. S;, 168, p. 61, 1900. Essexite. Basanite. Not fresh. TiO., low? Dried at 110°. J. E. Wolff, Theralite. North. Transc. Surv., , (Rosenbusch.) p. 11, 1885. J. E. Wolff, B. U. S. G. S., 150, p. 201, 1898. A. C. Law'son, B. Dep. G. Un. Cal., I, p. 38, 1893. F. Becke, T. M. P. M., XVI, p. 173, 1896. IV. C. Brogger, Z. Iv., XVI, p. 116, 1890. W. C. Brogger, Z. K., XVI, p. 116, 1890. IV. C. Brogger, Z. K., XVI, p. 33, 1890. W. C. Brogger, Eg. Kg., Ill, p. 106, 1899. H. Lenk, Vh. Ph. Med. Ges. Wurzb.,XXI, p. 36, 1887. J. E. Hibsch, T. M. P. M., XIV, p. 99, 1894. H. S. Washington, J. G., VIII, p. 613, 1900. H. S. Washington, J. G., viii, p. 613, 1900. Theralite. Carmeloite. Inclosure in trachyte. Pressed rhom- benporphyry. Pressed rhom- benporphyry. Laurdalite (nepheline- rich). Heumite. Phonolite. Dolerite (essexite). Leucite-kulaite. Kulaite. A1 2 0 3 corrected, given as 8.48. Sum high. Sum high. Iron oxides? S0 3 and Cl from sea w’ater? Outer part of lense. Inner part of lense. Cf. Eg. Kg., III, p. 19, 1899. Center of dike, cf. No. 10, umptekose. A1 2 0 3 as in T. M. P. M., XV, p. 487, 1895. Cf. No. 40, sho- shonose. Hornblende- basalt. Hornblende- basalt. 800 CHEMICAL ANALYSES OF IGNEOUS ROCKS. CLASS II. DOSALANE—Continued. RANG 3. ALKALICALCIC. SALEMASE. No. SiC 2 ai 2 0 3 Fe 2 0 3 FeO MgO CaO Na.,0 K 2 0 h 2 o+ hr! MH tc o 1 co 2 Ti0 2 p 2 o 5 MnO BaO Sum Sp. gr. 1 B3. IV 49. 23 . 821 17.69 .173 6. 87 : 043 2.03 .028 4.20 .105 12. 73 .226 2. 05 .033 5.18 • .056 6. 80 • 0.30 101.08 2. 885 20° RANG 3. ALKALICALCIC. SALEMASE. 1 44. 22 19. 54 2. 27 4. 33 6. 96 9. 02 2.46 3.84 5. 60 trace trace 0.12 99. 72 A3. Ill . 737 .191 .013 .060 .174 .160 .040 .041 — — .002 2 45. 53 18.37 4. 85 3. 43 4.11 8.15 3.93 4.16 2.62 1.68 1.54 1.50 0. 86 0. 72 101. 45 2. 657 C2. IV . 759 .180 .030 .048 .103 .145 .063 .044 .018 .006 .010 RANG 3. ALKALICALCIC. SALEMASE. 1 45. 20 17.12 5. 98 6. 55 5.29 7. 89 4. 23 2.31 5. 35 0. 68 100.60 A3. Ill .753 .168 .037 .091 .132 .141 .068 .024 .008 2 45. 32 18. 99 3. 78 9. 78 4. 68 9.19 3. 78 2.12 0. 31 0.09 1.94 99. 98 2.975 A3. Ill . 766 .186 .023 .136 .117 .164 .061 .023 .024 11° 3 41.28 18. 48 9. 44 8. 20 7.49 7.04 3. 52 2. 21 2. 74 100. 40 A3. Ill .688 .181 .059 .114 .187 .126 .056 .023 4 50. 47 18. 73 4. 19 4. 92 3. 48 8.82 4. 62 3.56 0. 58 trace 0.51 0.10 0.11 100.09 A2. II .841 .185 .026 .068 .087 .157 .074 .038 .006 .001 .002 5 44. 85 20. 63 6.91 5.10 6. 27 8.69 3.28 2. 65 1.15 0. 69 0.41 100. 63 A3. Ill .748 .202 .043 .071 .157 .155 .053 .029 .006 6 46. 40 21.90 3. 87 5. 80 3.97 7.96 4.81 3. 84 1.08 • 99.63 A3. Ill .773 .215 .024 .081 .099 .142 .078 .041 7 44. 50 20.31 2. 27 8.84 3. 90 11.44 3. 70 1.64 1.40 trace 0.31 1.22 0. 50 100.03 A2. II .742 .199 .014 .123 .098 .204 .059 .017 .004 .008 .007 8 44. 25 19. 26 5.83 6. 63 6. 98 9.15 4. 43 1.00 3. 30 trace 100. 83 A3. Ill .738 .188 .036 .092 .175 .162 .071 .011 — 9 43.19 19. 43 9. 67 2. 45 3. 43 11.48 3.93 1.25 3. 49 0. 67 0.14 0. 43 99.56 2.858 A2. II .720 .190 .060 .034 .086 .205 .003 .013 .002 .003 15° 10 50.16 17.97 2. 23 6. 25 4. 70 11.85 3.50 2. 80 none trace trace 0.30 100. 66 3. 03 A3. Ill .836 . 176 .014 .087 .118 .211 .056 .030 — — .004 11 48. 60 17. 87 6. 20 5. 76 4.32 9.11 4. 66 2. 06 1.78 100. 36 2. 77 A3. Ill . .810 . 175 .039 .080 . 108 .161 .075 . 022 DOSALANE-SALEMOSE. 301 ORDER 6. LENDOFELIC. NORGARE—Continued. SUBHANG 2. DOPOTASSIC. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. or 31.1 di 22.7 an 23.4 wo 4.3 ne 9.4 mt 6.5 hra 2.4 Morolo, Ernici, Italy. C. Viola. C. Viola, N. J., 1899, I, p. 97. Leucite-basalt. Sum high. SUBRANG 3. SODIPOTASSIC. S0 3 1.36 or 22.8 di 7.4 an 35.3 hv 5. 6 no 9.4 ol 10.2 mt 3.0 Hiisengebirge, n. Ur- berach, Hesse. Ivutscher and Rudolph. C. Chelius, cf. N. J., 1892, II, p. 252. Basaltic rock. or 24.5 di 11.8 ab 12.1 ol .3.5 an 20.3 mt 7.0 ne 11.4 il 2.8 ap 1.9 Madstein, n. Nesch- witz, Bohemia. F. Hanusch. J. E. Hibsch, T.M. P. M., XIV, p. 103, 1894. Camptonite. Sum high. Not fresh. SUBRANG 4. DOSODIC. SALEMOSE. Cl trace S0 3 Cl trace trace or 13.3 di 14.6 ab 17.8 Ol 8.9 an 21.2 mt 8.6 ne 9.7 il 1.2 or 12.8 di 14.2 ab 14.1 ol 11.9 an 28.4 mt 5.3 ne 9.7 il 3.7 or 12.8 di 5.5 ab 10.0 ol 16.8 an 28.4 mt 13.7 ne 10.5 or 21.1 di 18.9 ab 17.3 ol 3.2 an 20.3 mt 6.0 ne 11.6 il 0.9 or 16.1 di 7.8 ab 11.0 ol 11.3 an 33.4 mt 10.0 ne 9.1 or 22.8 di 10.5 ab 4.2 ol 8.6 an 26.7 mt 5.6 ne 19.9 or 9.5. di 12.8 ab 12.1 ol 13.3 an 34.2 mt 3.2 ne 10.2 ap 2.7 or 6.1 di 12.9 ab 15.7 ol 13.2 an 29.5 mt 8.4 ne 11.6 or 7.2 di 17.5 ab 16.2 ol 0.4 an 31.7 mt 7.9 ne 9.1 hm 4.2 ap 1.0 or 16.7 di 27.5 ab 11.5 ol 5.8 an 25.0 mt 3.2 ne 9.7 or 12.2 di 18.8 ab 22.5 ol 5.2 an 21.7 mt 9.0 ne 9.1 land, Maine. Essex County, Massachusetts. Russell Mine, South Mountain, Pennsyl¬ vania. Mount Fairview, Ros- ita Hills, Colorado. Mount Franklin, Vic¬ toria, British Co¬ lumbia. Ullernas, Norway. Steinburg, Wester- wald, Rh. Prussia. Krotenkopf, Hesse. Spreudlingen, n. Frankfort a. M. Hesse. Crater Walls, Kilauea, Hawaii. Dyer’s Pass, Canter¬ bury, New Zealand. E. C. E. Lord. H. S. Washing¬ ton. C. H. Hender¬ son. L. G. Eakins. F. G. Wait. G. Forsberg. Jungeblodt. Ivrauss. Not stated. C. Silvestri. R. Speight. E. C. E. Lord, A. G., XXII, p. 344, 1898. H. S. Washington, J. G., VII, p. 63, 1899. C. H. Henderson, Tr. Am. Inst. M. E., XII, p. 82, 1884. W. Cross, pr. Colo. Sc. Soc., II, p. 247, 1887. G. C. Hoffman, A. R. G. S. Can.,VI., p. 31 R., 1895. W. C. Brogger, Z. K., XVI, p. 49, 1890. j A. Dannenberg, T. M. P. M., XVII, p. 480, 1898. j K. Oebbeke, Jb. Pr. G. L-A., IX, p. 406, 1889. C. Chelius, N. J. 1894, II, p. 419. C. Silvestri, B. C. G. It., XIX, p. 191, 1888. R. Speight, Tr. N. Z. Inst., XXVI, p. 409, 1894. Camptonite. Hornblende- gabbro. Basalt. Augite-diorite. Lava. Near limburgose. Also in 17 A. R. U. S. G. S., II, p. 324, 1896. Syenite-diorite. ; Border of mass. Cf. No. 16, pu- laskose. Augite-andesite. Nepbelite-ba- ] Near subrang 5. sanite. Hornbl ende- basalt. Augite-ande¬ site. Dolerite. 302 CHEMICAL ANALYSES OF IGNEOUS ROCKS. CLASS II. DOSALANE—Continued. RANG 3. ALKALI CALCIC. SALEMASE. No. Si0 2 A1A Fe,0 3 FeO MgO CaO Na 2 0 k 2 o h 2 o+ h 2 o- co 2 Ti0 2 p 2 0 5 MnO BaO Sum Sp. gr. 1 49.61 19.18 2.12 5.01 4. 94 10. 05 5. 62 1.04 3. 55 0. 27 101. 39 2. 782 C3. V .827 .188 .013 .070 .124 .180 .091 .011 .002 2 47. 30 18. 27 2.24 6.95 6. 78 7.95 5.99 1.00 0. 07 1.47 1.61 99. 63 2. 856 A2. II .788 .179 .014 .097 .170 .142 .097 .011 .018 .011 RANG 4. DOCALCIC. 1 45. 76 20. 48 1.99 4.18 8.50 11.57 3.56 0. 80 2.80 99. 64 A3. Ill .763 .200 .013 .058 .213 .207 .057 .008 2 45.11 19. 67 4.32 8.57 5. 65 10. 45 3. 87 0.64 0.83 0.17 0.21 0. 25 100. 07 A2. II . 752 .192 .027 .120 .141 .186 .063 .006 .003 .002 3 42. 08 20. 88 6. 77 3.17 6. 85 12. 48 3.37 0. 44 3.18 99. 22 B3. IV .701 .204 .042 .044 .171 .223 .055 .005 ♦ CLASS II. DOSALANE. RANG 1. PERALKALIC. LUJAVRASE. 1 51.93 20. 29 3. 59 1.20 0. 22 1.65 8. 49 9.81 0. 99 0.10 0. 25 0. 20 0. 06 trace 0. 09 100. 58 .27 ' Al. I. .866 .199 .022 .018 .006 .030 .137 .104 .003 — — .001 100.31 2 53.10 19.07 5. 57 none 0.17 1.33 9.41 6. 84 3. 98 0.10 99.57 A3. III. .885 .187 .035 — .004 .024 .152 .073 3 52.16 20.14 6. 45 n.d. 1.54 4. 64 5. 73 8.12 1.39 trace trace trace 100.17 A4. IV. .869 .197 .040 (.080) .039 .083 .092 086 — — RANG 1. PERALKALIC. LUJAVRASE. 1 51.62 15. 63 6. 06 4. 98 trace 3. 45 10.09 4.19 2.12 0. 33 100. 61 A2. II. .860 .153 .038 .069 — .062 .163 .045 .005 2 49. 46 23. 53 3. 04 1.02 0.03 0. 80 14. 71 4. 34 1.38 101.27 .51 A‘2. II. .824 .231 .019 .014 .001 .014 .237 .046 100.76 3 48. 13 18. 44 3.41 4. 30 3.06 5. 89 8. 00 3. 80 . 1.59 0.18 1.74 0. 49 0.19 0.10 99. 93 .09 Al. I. .802 .180 .021 .060 « .077 .105 .129 .040 .022 .003 .003 .001 99.84 4 51.94 16. 66 3. 68 2. 68 3. 81 4. 81 7.53 5.63 0. 58 • 3.30 0.20 100. 82 2. 579 B2 III. .866 .163 .023 .037 .095 0.86 .120 .060 .041 .003 5 51.04 20. 47 1.89 2.19 0. 97 2.62 11.62 3. 52 5.85 0.62 0. 29 0. 27 101. 35 2. 460 C2. IV. .851 .200 .012 .030 .024 .047 .187 .038 .004 .002 6 49.07 19. 46 2. 30 3. 50 0. 60 3. 82 9. 25 4. 39 5. 99 trace 0. 64 trace 0. 38 99. 40 B2. III. .818 .191 .014 .049 .015 .068 .149 .047 1 .008 .005 DOSALANE-LUJAVROSE. 303 ORDER 6. LENDOFELIC. NORGARE—Continued. SUBRANG 5. PERSODIC. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. SO 3 trace or 6.1 ab 23.1 an 23.9 lie 13.3 di 21.8 ol 6.6 mt 3.1 Point Sal, California. H. W. Fair¬ banks. H. W. Fairbanks, B. Dep. G.,Un. Cal. II, p. 30, 1896. Augite-teschen- ite. Sum high. or 6.1 ab 29.'3 an 19.7 ne 11.6 di 7.0 ol 16.1 mt 3.2 il 2.8 ap 3.9 Pedregal, Tlalpam, Mexico. P. Krais. Felix and Lenk, Btr. G. Mex. I, p. 103, 1890. Basalt. SUBRANG 3. PRESODIC. or 4.4 di 16.0 ab 12.6 ol 14.1 an 37.5 mt 3.0 ne 9.4 Rosswein, Saxony. Sachsse and Becker. Sachsse and Becker, cf. N. J., 1893, II, p. 503. Gabbro. • FeSo 0.33 or 3.3 di 14.7 ab 17.3 ol 14.0 an 34.2 mt 6.4 ne 8.5 Lindenfels, Hesse. R. Marzahn. C. Chelius, Erl. G. Kte. Hesse, IV Lief., p. 37, 1896. Diorite. or 2.8 di 17.2 ab 8.9 ol 6.6 an 40. 0 mt 9. 7 ne 10.8 Burberg, n. Carls- berg, Bohemia. J. M. Clements. J. M. Clements, Jb. G. R-A. Wien., XL, p. 345, 1890. Basalt. Sum low. ORDER 7. LENFELIC. ITALARE. y SUBRANG 3. SODIPOTASS1C. JANElltOSE. SO a 0.67 or 33. 9 ac 10.2 Beaver Creek, II. N. Stokes. Weed and Pirsson, Leucite- Cl 0.70 F 0.27 1c 18.7 di 5. 1 so 9.8 il 0.5 Bearpaw Mountains, A. J. S., II, p. 196, tinguaite. SrO 0.07 no 5.3 ft 0.7 Montana. 1896. LioO trace or 40. 6 ac 16.2 Km 37, Sta. Cruz R. R. P. Jannasch. H. Rosenbusch, Tinguaite. ab 5.8 di 1.0 ne 30.1 wo 2.3 Rio Janeiro, Elemente, p. 215, Brazil. 1898. S0 3 trace or 41.1 di 15.2 Pogos de Caldas, F. W. Dafert. E. Hussak, Leucitophyre. Cl trace an 5.3 ol 6.1 lc 5 2 Sao Paolo, N. J. 1892, 11, p. 149. 1 ne 26.5 Brazil. * SUBRANG 4. DOSODIC. LUJAVROSE. Zr0 2 2.14 or 25.0 ac 17.6 ab 7.9 ns 2.0 ne 26.4 di 15.4 z 3.1 ol 0.7 ZrOo 0.54 or 25.6 ac 8.8 Cl 2.25 ab 8.9 di 4.5 ne 17.9 SO 31.4 Z 0.7 ZrOo 0.05 or 22.2 di 18.6 Cl 0.29 ab 14.1 ol 0.8 F 0.06 an 3.1 mt 4.9 S 0.09 ne 29.0 il 3.4 Cro0 3 none ap 1.1 Ni'O 0.02 SrO 0.10 or 33.4 ac 7.9 ab 7.3 di 18.5 ne 25.3 ol 0.7 il 6.0 hm 1.0 or 21. 1 ac 5.5 ab 18.3 ns 1.4 ne 36.4 di 11.0 ol 0.5 or 26.1 ac 2.3 ab 13.6 di 13.2 ne 33.5 wo 1.6 mt 2.1 il 1.1 Kangerdluarsuk, Greenland. N. V. Ussing. H. Rosenbusch, Elemente, p.' 126, 1898. Lujaurite. Kangerdl uarsuk, Greenland. N. V. Ussing. H. Rosenbusch, Elemente, p. 126, 1898. Sodahte- syenite. Mount Inge, Uvalde County, Texas. W. F. Hille- . brand. W. Cross, B. U. S. G. S., 168, p. 61, 1900. Basanite. Picota, Serra de Monehique, Portu¬ gal. Zilliacus. K.-Koschlau and Hack- man, T. M. P. M., XVI, p. 272, 1896. Camptonitic tinguaite. Elfdalen, Dalarne, Sweden. P. Mann. P. Mann, N. J. 1884, II, p. 193. Phonolitg. (Cancri nite-aegi rite-syenite.) Not fresh. Slid Berge, Ainu, Sweden. N. Sahlbom. N. Sahlbom, N. J. 1897, II, p. 97. Nephelinite. Not fresh. Sum low. 304 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS II. DOSALANE—Continued. RANG 1. PERALKALIC. LUJAYRASE—Continued. No. Si0 2 A1A Fe 2 0 3 FeO MgO CaO Na^O k 2 o h 2 o+ 11,0 co 2 Ti0 2 FA - \ - MnO BaO Sum Sp. gr. 7 54.14 20.61 3. 28 2. 08 0. 83 1.85 9. 87 5. 25 0. 40 0.95 0. 25 100. 55 A2. II. .902 .202 .020 .030 .021 .033 .159 .057 .012 .004 8 52. 25 22.24 2. 42 1.98 0. 96 1.54 9. 78 6.13 0. 73 0. 60 0. 53- 99.16 B2. III. .871 .218 .015 .028 .024 .027 . 158’ . 065 .007 .008 RANG 2. DOMALICALIC. VULTURASE. 1 49. 73 19.20 5. 50 2. 41 (2.63) 7. 96 1.99 9.39 1.19 trace 100. 00 2. 655 B3. IV. .829 .188 .034 .033 .066 .142 .032 .100 — 2 47. 89 18. 25 4. 93 3. 64 3. 68 8. 70 2. 60 8.23 0.65 0. 77 99. 34 2. 781 B2. III. .798 .179 .031 .051 .092 .155 .042 .088 .010 3 48. 99 19.82 5. 26 2.59 2. 82 8.13 Q 1 *7 O. 1 / 9.06 n. d. 0. 33 100.17 A3. III. .817 .194 .033 .036 .071 .145 .051 .096 .002 RANG 2. DOMALKALIC. VULTURASE. 1 50.55 20. 48 2. 66 4. 02 4.24 7.30 8.37 2. 27 A3. III. .843 .201 .017 . 056 .106 .130 .135 .024 2 42.46 18. 49 3. 35 6.31 3. 64 8. 70 7.12 4.58 A3. III. * .708 .181 .021 .088 .091 .106 .114 .049 0. 44 2.31 100.33 99. 92 RANG 3. ALKALICALCIC. i 47.40 19. 84 2. 72 4. 40 4. 23 9. 88 2. 93 5.91 1. 66 0.30 99. 27 B2. III. .790 .194 .017 .061 .106 .177 .047 .063 .004 RANG 3. ALKALICALCIC. 1 39. 08 22.13 3. 40 5. 72 5. 44 12. 56 6. 85 1.77 1.28 0. 85 0. 50 trace 99. 58 2.910 A2. II. .651 .217 .021 .079 .136 .224 .110 .019 .011 .003 — 2 39. 03 21.57 8. 98 6. 82 4. 52 12. 58 3.82 2. 63 0. 55 100. 50 3.145 A3. III. .651 .211 . 056 .094 .113 .225 .061 .027 CLASS II. DOSALANE. RANG 1. PERALKALIC. 1 47. 43 23. 60 4. 59 1.20 0. 67 4. 42 15. 08 2. 00 n. d. 0.10 99.09 A3. Ill .791 .231 .029 .017 .017 .078 .243 .021 DOSALANE-CAMPANARE. 305 ORDER 7. LENFELIC. ITALARE—Continued. SUBRANG 4. DOSODIC. LOT A VROSE—Continued. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. ZrO., 0.92 Cl " 0.12 or 31.7 ab 18.3 ne 31.2 Z 1.3 ac 6.5 di 7.6 mt 1.4 il 1.8 Tschasnatsch orr, Umptek, Kola, Finland. F. Eichleiter. F. Eichleiter, Vh. G. R-A. Wien, XXVII, p. 218, 1893. Nephelite- syenite ' (lujavrite). Also in V. Hack- man, Fennia, XI, No. 2, p. 132, 1894. or 36.1 ab 12.6 ne 36.6 ac 2.3 di 6.0 ol 0.6 mt 2.3 il 1.1 Rabot’s Spitze, Umptek, Kola, Finland. V. Hackman. V. Hackman, Fennia, XI, No. 2, p. 132, 1894. Lujavrite. Sum low. SUBRANG 2. DOPOTASSIC. BRAC'CIANOSE. or 28.4 an 15.6 lc 21.4 ne 9.1 di 14.2 wo 2.3 mt 7.9 Bracciano, Italy. H. S. Washing¬ ton. H. S. Washington, J. G., V, p. 49, 1897. Leucite- tephrite. MgO from loss. or 14.5 an 13.6 lc 27.0 ne 11. 9 di 23.2 mt 7.2 il 1.5 Crocicchie, Lake Bracciano, Italy. H. S. Washing¬ ton. H. S. Washington, J. G., V, p. 49, 1897. Leucitite. Sum low. or 15.6 an 13.1 lc 29.6 ne 14.5 di 16.1 wo 3.9 mt 7.7 Lava of 1893, Mt. Vesuvius, Italy. Mrha. F. Becke, T. M. P. M., XVIII, p. 94, 1898. Leucite- basanite. MgO low? SUBRANG 4, DOSODIC. VULTUROSE. Cl trace or 13.3 di 19.6 ab 17.8 ol 5.0 an 11.7 mt 3.9 ne 28.7 Cuyamas, San Luis Obispo County, California. V. Lenher. H. W. Fairbanks, B. Dep. G. Un. Cal., I., p. 293, 1895. Analcite- diabase. (teschenite). H 2 0 low? so 3 2.44 or 19.5 di 13.9 Melfi, Monte Vulture, C. F. Rammels- C. F. Rammelsberg, Hauynophyr. Cited for com- Cl 0.52 an 15.3 ol 8.2 lc 6.1 mt 4.9 so 6.9 no 21.3 Italy. berg. Z. D. G. G., XIII, p. 273, 1860. parison. In Roth., 1861, p. 37. SUBRANG 3. SODIPOTASSIC. or 16.7 di 21.1 Orchi, RoccaMonfina, A. Rohrig. H. S. Washington, Leucite- Sum low. an 23.4 ol 4.3 lc 14.4 mt 3.9 Italy. J. G., V, p. 247, 1897. tephrite. ne 13.3 SUBRANG 4. DOSODIC. Cl S Cr 2 0 3 trace an 24.5 ol 14.3 trace lc 6.5 am 12.7 trace kp 1.3 mt 4.9 ne 31.2 il ap 1.6 1.1 an 34.2 di 7.7 lc 11.8 ol 9.0 ne 17.3 am mt 6.9 13.0 Lenbach, Rhbnge- birge. Kreuzberg, Rhonge birge. H. Lenk. E. v. Seyfried. H. Lenk, Vh. Ph. Med. Ges." Wurzb., XXI, p. 54, 1887. E. v. Seyfried, cf. N. J., 1898, II, p. 61. Nephelinite. Neph elite- basalt. A1 2 0 3 high? ORDER 8. FELDOLENIC. CAMPANARE. SUBRANG 5. PERSODIC. or 11.7 ac 13.4 ab 1.6 ns 0.5 ne 58.5 di 7.9 WO 5.1 9 Penikkavaara, Kuuosamo, Finland. M. Dittrich. V. Hackman, B. G. G. Fink, No. 11, p. 22, 1900. Soda-sussexite. Low sum, to H 2 0? due 14128 — No. 14—03 20 306 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS II. DOSALANE—Continued. RANG 2. DOMALKALIC. VESUVASE. No. Si0 2 A1A Fe 2 O s FeO MgO CaO Na-jO K 2 0 H,0+ h 3 o- co 2 Ti0 2 PA MnO BaO Sum Sp. gr. 1 47.71 18. 44 2. 46 5. 68 4. 80 9. 42 2. 75 7. 64 trace none 0. 37 trace 99. 27 B2. Ill .795 .181 .015 .079 .120 .168 .044 .081 — .005 — 1 2 47. 65 19. 28 2. 63 6. 48 4.19 9.01 2. 78 7.47 0.13 0.11 none trace 0. 50 trace 100.23 A2. II .794 .189 .016 .090 .085 .160 .045 .080 .003 — RANG 2. DOMALKALIC. VESUVASE. 1 38.11 20. 84 5. 67 1.46 3. 80 14. 44 6.65 2.12 4.51 0.57 0. 65 0. 48 0. 84 0.14 none 100.60 Al. I .635 .204 .035 .020 .095 .258 .107 .023 .006 .006 .002 CLASS II. DOSALANE. RANG 1. PERALKALIC. URTASE. 1 44. 40 19.95 5.15 2.77 1.75 8.49 6.50 8.14 1.17 0. 24 0.12 1.53 0. 37 0. 08 0. 01 100.76 2. 770 Al. I .740 .196 .032 .039 .044 .152 .105 .087 .019 .003 .001 — 26° 2 45. 64 19.50 3.47 3.34 3. 04 4. 45 11.57 6. 96 0.16 2. 44 0.19 100.76 A2. II .761 .191 .022 .046 . 076 .079 .187 .074 .031 .003 3 46. 48 19.00 4. 74 2. 30 2. 49 4. 35 8.46 6. 78 3. 31 0. 36 1. 22 0.15 trace 99.91 2.58 Al. I .741 .186 .030 .032 .062 .078 .136 .072 .015 .001 — RANG 1. PERALKALIC. URTASE. 1 45.18 23. 31 6.11 n. d. 1.45 4.62 11. 17 5.95 1.14 98.92 D4. V .753 .228 (.038) (.044) .036 .082 .180 .064 2 45. 46 26. 73 4.31 0. 60 trace 2.09 15.07 4.23 0. 44 0.12 99. 05 B3. IV . 758 .262 .027 .008 — .037 .243 .045 .002 3 45. 43 28. 77 3.10 0.40 0. 22 1.86 16.16 3.38 n. d. 99. 32 A3. Ill . 757 .282 .019 .006 .006 .033 .261 .036 4 45. 28 27. 37 3. 53 0. 49 0.33 1. 22 17.29 3. 51 0.40 0.19 99. 53 A3. Ill . 755 .268 .022 .007 .008 .022 .279 .037 .003 5 43. 02 24. 63 3. 59 2.17 1.96 5. 47 14. 81 2. 99 n. d. 0.63 0. 70 99.97 A2. II .717 .241 .022 .030 .049 .098 . 239 .032 .008 .005 DOSALANE-URTOSE. 307 ORDER 8. FELDOLENIC. CAMPANARE—Continued. SUBRANG 2. DOPOTASSIC. VESUVOSE. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. or 3.9 di 2o. 4 Lava of 1631, LaScala, H. S. Washing- H. S. Washington. Leucite- Sum low. an Id. t> ol o. 4 lc 32.3 mt 3.5 Mount Vesuvius. ton. Not published. basanite. ne 12.5 il 0.7 or 13.3 di 19.9 Lava of 1872, near H. S. Washing- H. S. Washington. Leucite- an 1 / . o ol o. 3 lc 24.4 mt 3.7 Observatory, ton. Not published. basanite. ne 12.8 ap 1.1 Mount Vesuvius. . SUBRANG 4. DOSODIC. ZrOo SO,' S 0.18 an 20.6 wo 5.7 none lc 10.0 ol 6.7 0.14 ne 30.4 am 11. 3 mt 3.2 il 0.9 hm 3.3 ap 2.0 Baptist church, Magnet Cove, Arkansas. H. S. Washing¬ ton. H. S. Washington, J. G., IX, p. 619,1901. Biotite-ijolite. Not fresh. ORDER 9. PERLENIC. LAPPARE. SUBRANG 3. SODIPOTASSIC. ARKANSOSE. ZrOo S0 3 ' S so. Cl 0.03 an i.i di 9.6 0.06 lc 37.9 wo 12.0 none ne 29.8 mt 4.9 il 2.8 hm 1.8 lc 29.6 ac 10.2 ne 33.2 ns 5.9 kp 1.9 ol 7.0 am 8.1 il 4.5 0.19 lc 31.5 ac 10.2 0.08 ne 32.4 di 15.6 am 0.8 mt 1.9 il 2.3 Diamond Jo Quarry Magnet Cove, Arkansas. Wudjavrtschorr, Umptek, Kola, Finland. Etinde Volcano, Ivamerun, Africa. H. S. Washing¬ ton. H. S. Washington, J. G., IX, p. 616,1901. Arkite (leucite- syenite). V. Hackman. V. Hackman, Fennia, XI, No. 2, p. 151, 1894. Nephelite- Alkalies high? porphyry. M. Dittrich. E. Esch, Sb. Berl. Ak., 1901, p. 299. Leucitite. SUBRANG 4. DOSODIC. URTOSE. lc 27.9 ac 7.4 ne 46.6 di 1.0 ol 6.7 am 7.7 Beemerville, New Jersey. J. F. Kemp. J. F. Kemp, Tr. N. Y. Ac., XI, p. 67, 1892. Nephelite- porphyry (sussexite). lc 19.6 ac 12.0 ne 61.6 di 2.1 wo 3.3 Lujavr-Urt, Kola, Finland. W. Petersson. W. Ramsay, G. F. F., XVIII, p. 462, 1896. Urtite. Sum low. “Ti0 2 ca. 2.00, with Si0 2 .” or 5.6 ac 6.9 lc 11.3 di 1.8 ne 69.9 wo 2.9 mt 0.9 Lujavr-Urt, Kola, Finland. A. Zilliacus. W. Ramsay, G. F. F.; XVIII, p. 462, 1896. Urtite. Low sum, due to H 2 0. lc 16.1 ac 10.2 ne 65.0 ns 3.4 di 3.4 wo 0.8 Lujavr-Urt, Kola, Finland. N. Sahlbom. W. Ramsay, G. F. F., XVIII, p. 462, 1896. Urtite. “Ti0 2 ca 2. 00, with Si0 2 .” lc 9.6 ac 10.2 kp 3.2 ns 1.0 ne 59.4 ol 5.8 am 8. 2 mt 1.1 ap 1.7 Iivaara, Kuuosamo, Finland. A. Zilliacus. V. Hackman, B. G. G. Finl., No. 11, p. 17, 1900. Ijolite (nephelite- rich). 308 CHEMICAL ANALYSES OF IGNEOUS ROCKS. CLASS II. DOSALANE. SECTION 1. C EXTREME OVER Z RANG 2. DOMALKALIC. No. Si0 2 Al 2 () 3 Fe 2 0 3 FeO MgO CaO Xa 2 0 K,0 h 2 o+ h 2 o- C0 2 Ti0 2 pa MnO BaO Sum Sp. gr. 1 B3. IV 58.60 .977 22. 90 .224 2. 52 .016 6. 98 .097 3.97 .099 1.65 .030 3.25 .052 0.51 .005 0.63 101.01 2. 85 SECTION 1. C EXTREME OVER Z. RANG 2. DOMALKALIC. 1 50.10 27.60 3.65 9.14 3.86 1.53 3. 04 0. 81 1.00 100. 73 2. 92 A3. Ill .835 .270 .023 .127 .097 .027 .049 .008 RANG 3. ALKALICALCIC. 1 52. 84 23. 62 0.65 10. 00 3.16 3. 92 2.64 0. 67 1.87 trace 0.43 none 99. 80 2. 83 A2. II .881 .231 .004 .140 . 056 .070 .042 .007 — .006 — 2 58.00 22.20 1.97 7. 24 3. 84 2.17 3.18 0. 68 0.40 99. 68 2. 85 A3. Ill .967 .218 .012 .100 .('96 .039 .051 .007 DOSALANE-SUBCLASS II. 309 SUBCLASS II. Q+F + L DOMINANT OVER C + Z. ORDER 3. QUARFELIC. SUBRANG 3. PRESODIC. Q 23.4 hy 21.3 or 2.8 ab 27.2 rat 3.7 • an 8.3 C 11.0 « Le Pallet, Loire In¬ fer., France. A. Pisani. A. Lacroix, B. S. C. G. Fr., LXVII, p. 23, 1899. Norite. Product of con¬ tact rneta- morphism? ORDER 4. QUARDOFELIC. SUBRANG 3. PRESODIC. Q 13.7 hy 23.5 Le Pallet, Loire In- A. Pisani. A. Lacroix, Norite. Product of con- or 4.4 ab 25.7 an 7.5 C 19.0 mt 5.3 fer., France. B. S. C. G. Fr., LXVII, p. 23, 1899. tact meta- morphism? SUBRANG 3. PRESODIC. SrO none Q 15.3 hy 24.4 or 3.9 mt 0.9 ab 22. 0 an 19.5 C 11.4 Snowbank Lake, Min¬ nesota. \ A.N.Winchell. A. N. Winchell, A. G., XXVI, p. 303, 1900. Cordierite- norite. Product of con¬ tact meta¬ morphism? Q 21.4 hy 21.1 or 3.9 mt 2.8 ab 26.7 an 10. 8 C 12.3 Le Pallet, Loire In¬ fer., France. A. Pisani. A. Lacroix, B. S. C. G. Fr., LXVII, p. 23, 1899. Norite. Near order 3. Product of contact meta¬ morphism? 310 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS III. SALFEMANE. SUBCLASS I. Q+F+L EXTREME OVER C+Z. RANG 1. PERALKALIC. ROCKALLASE. No. SiO, A1A Fe 2 0 3 FeO MgO CaO Na 2 0 k 2 o h 2 0+ H.,0- O ° Ti0 2 p 2 o 5 MnO BaO Sum Sp. gr. 1 A3. Ill 68. 75 1.146 5.91 .058 5.81 .036 5.33 .074 0. 08 .002 2.11 .038 7.52 .121 4. 28 .046 n. d. 100.02 2. 47 RANG 1. PERALKALIC. ROCKALLASE. 1 73. 60 4. 70 13.10 n. d. •o. 11 0. 37 6. 96 trace n. d. trace 0. 93 99. 83 2.8 A3. Ill 1.227 .046 .082 .032 .003 .006 .112 — — .012 CLASS III. SALFEMANE. RANG 3. ALKALICALCIC. VAALASE. 1 53. 35 12.90 2.64 , 11.28 2. 68 6. 96 2.83 1.40 1. 76 0. 91 2. 44 0.45 0. 25 0. 05 100. 07 Al. I .889 .126 .016 .157 . 067 .124 .045 .015 .030 .003 .004 — 2 50. 85 12. 54 10. 03 7.11 5. 57 9.33 2. 37 1.13 0. 34 0. 76 100.08 A3. Ill .848 .123 .062 .099 .139 .166 .039 . 012 .005 3 55. 87 13. 52 2. 70 5.89 6. 51 8.87 2. 42 1. 72 1. 56 0. 09 0. 56 0. 25 0. 10 0. 02 100. 08 Al. I .931 .132 .017 .082 .163 .159 .039 .018 .007 .002 .001 — ' 4 50.57 11. 70 12.36 5.89 3. 98 7. 89 3. 70 0. 82 1. 44 1.02 99.37 2.913 B2. Ill .843 .115 .077 .082 .100 .141 .060 .009 .013 5 49. 07 10. 60 12. 03 6.57 4. 68 8.58 2.56 1.76 1.70 1.65 99. 20 3. 020 B3. IV .818 .104 . 075 .092 .117 .153 .041 .019 • 6 52.7 11.4 9.0 3.7 7.4 11.6 2.3 0.7 1.4 100.2 A3. Ill .878 .112 .056 .051 .185 .207 .037 .007 7 52. 67 10. 62 10. 43 4.21 7.04 11.70 2.19 Q. 65 0. 38 99. 89 A3. Ill .878 .104 .065 .058 .176 .209 .035 .007 8 52. 22 10. 66 9.39 5.15 6. 64 11.27 2. 34 0.51 100.16 A3. Ill .870 .104 .059 .072 .166 .201 .038 .005 RANG 4. DOCALCIC. 1 56.18 14. 76 2.12 6. 98 8.11 7.97 1.62 0.80 1.37 0. 08 0.17 100.16 A3. Ill .936 .145 .013 .097 .203 .143 .026 .008 .001 .002 2 52.11 13. 70 * 1.22 9. 86 8:08 12.16 1.31 0. 16 0.53 0. 06 0. 32 0. 05 0. 20 none 99. 79 Al. I .869 .134 .008 .138 .202 .217 .021 .002 .004 — .003 — 3 51.68 13. 52 4. 87 9.71 5.19 8. 84 2. 14 0.12 0. 50 0.04 1.20 0.17 0. 66 none 100.08 Al. I .861 .133 .030 .136 .130 .158 .034 .001 .015 .001 ’ .009 — 4 51.82 13.55 10. 07 2. 85 7.35 10. 86 2.52 0. 23 1.40 100. 65 A3 III .864 .133 .063 .040 .184 .194 .040 .002 SALFEMANE-VAALOSE. 311 ORDER 3. QUARFELIC. ATLANTARE. SUBRANG 2. DOPOTASSIC. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. Q 28.0 ac 16.6 or 25. 6 ns 8. 5 ab 6.3 di 9.4 hy 5.1 Fossa del Gallo, Cud- dia Randazzo, Pan- telleria. H. Forstner. H. Forstner, Z. K., VIII, p. 179, 1884. Pantellerite. SUBRANG 5. PERSODIC. ROCKALLOSE. NiO 0.06 Q 38.0 ac 30.5 ab 24.1 di 1.4 hy 5.5 Rockall Island, N. At¬ lantic Ocean. C. J. S. Makin. J. W. Judd, Tr. R. Ir. Ac., XXXI, Pt. Ill, p. 54, 1897. Rockallite. MnO used in calculating norm. ORDER 4. QUARDOFELIC. VAALARE. SUBRANG 4. DOSODIC. VAALOSE. FeS., Cr»0 3 v»o 3 NiO SrO 0.13 none 0.04 trace trace Q 10.2 or 8.3 ab 23.6 an 18.3 di 11.7 hy 15.3 mt 3.7 il 4.6 ap 1.0 Teanaway River, Kit¬ titas County, Wash¬ ington. W. F. Hille- brand. G. O. Smith, B. U. S. G. S., 168, p. 225, 1900. Basalt. so 3 0.05 Q 8.6 or 6.7 ab 20.4 an 20.0 di 17.8 hy 10.3 mt 14.4 ap 1.7 Rockland Ridge, Columbia River, Washington. E. A. Schnei¬ der. • E. A. Schneider, A. J. S., XXXVI, p. 237, 1888. Augite- andesite. SrO Li 2 0 none trace Q 8.0 or 10.0 ab 20.4 an 20. 9 di 19.0 hy 14.6 mt 3.9 il 1.1 Emigrant Gap, Placer County, California. W. F. Hille- brand. W. Lindgren, B. U. S. G. S., 148, p. 212, 1897. Gabbro. Cf. No. 63, andose. Q 8.5 or 5.0 ab 31.4 an 12.8 di 20.6 hy 0.5 mt 16.2 il 2.0 hm 1.1 Rio de Janeiro, Brazil. T. L. Bailey. E. O. Hovey, T. M. P. M., XIII, p. 216, 1892. Diabase. Sum low. Q 7.0 or 10.6 ab 21.5 an 12.2 di 26.3 hy 1.5 mt 17.4 Rio de Janeiro, Brazil. F. Quincke. E. 0. Hovey, T. M. P. M., XIII, p. 216, 1892. Diabase. Sum low. Q 9.2 or 3.9 ab 19.4 an 18.9 di 30.1 hy 4.6 mt 11.8 hm 0.8 Oudedrift, Beaufort West, Cape Colon}'. Wappler. E. Cohen, N. J. B. B., V, p. 233, 1887. Olivine-diabase. Iron oxides? Q 10.7 or 3.9 ab 18.3 an 17.2 di 31.8 hy 2.9 mt 13.5 hm 1.1 Nel’s Poort, Beaufort West, Cape Colony. Holdermann. E. Cohen, N. J. B. B., V, p. 233, 1887. Olivine-diabase. Q 10.3 or 2.8 ab 19.9 an 17.0 di 30.7 hy 3.8 mt 13.7 Powder Tower, Coles- burg, Cape Colony. A. Bernthsen. E. Cohen, N. J. B. B., V, p. 245, 1887. Diabase- podphvrite. SUBRANG 3. PRESODIC. Q 12.1 di 9.4 Rock Creek tunnel, L. G. Eakins. G. H. Williams, Hornblende- Not described. or 4.4 ab 13.6 an 28.1 hy mt 26.8 3.1 Washington, D. C. B. U. S. G. S., p. 85, 1897. 148, diorite. ZrO- none Q 10.5 di 29.4 Near Cranberry, North W. F. Hille- A. Keith, Diabase (gar- S NiO SrO trace 0.03 none or 1.1 ab 11.0 an 30.9 hy mt il 13.8 1.9 0.6 Carolina. brand. B. U. S. G. S., p. 52, 1900. 168, netiferous). Li,,0 trace ZrO-. trace Q 10.4 di 13.9 Mazaruni District. J. B. Harrison. J. B. Harrison, Diabase. Dried at 100°. so 3 FeS 2 0.06 0.80 or , 0.6 ab 17.8 hy mt 18.2 7.0 British Guiana. Priv. contrib. CoO 0.55 an 27.2 il 2.3 Cu 0.01 Pb 0.02 Q 8.6 di 22.3 Lobbes Farm, n. Riet- Ehrhardt and E. Cohen, Olivine-diabase. Iron oxides? or 1.1 ab 21.0 an 25.3 hy mt hm 8.1 9.3 3.7 fluss, Orange River Colony. Schwedes. * N. J. B. B., V p. 233, 1887. 312 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS III. SALFEMANE—Continued. RANG 1. PERALKALIC. ORENDASE. No. Si0 2 A1 2 O s FeA FeO MgO CaO Na 2 0 K,0 h 2 0+ H 2 0- C0 2 Ti0 2 PA MnO BaO Sum Sp. gr. 1 54.17 10.16 3.34 0.65 6. 62 4.19 1.21 11.91 1.01 0. 52 0. 49 2. 67 1.59 0. 06 0. 59 100.21 0.17 2.699 Al. I .903 .100 .021 .009 .166 .075 .019 .126 .033 .011 .001 .004 100.04 19° 2 54. 08 9.49 3.19 1.03 6. 74 3. 55 1.39 11. 76 2. 71 0. 79 2. 08 1.35 0. 05 0.67 99. 97 0. 21 2. 686 Al. I .901 .093 .020 .014 .169 .063 .022 . 125 .026 .009 .001 .005 99.76 23° 3 53. 70 11.16 3.10 1.21 6. 44 3. 46 1.67 11.16 2. 61 0.80 1.92 1.75 0.04 0. 62 100. 40 0.19 2. 627 Al. I .893 .109 .019 .017 .161 .061 .027 .119 .024 .013 .001 .004 100.21 30° RANG 1. PERALKALIC. ORENDASE. 1 51.08 11.37 11.17 5.64 3. 96 5. 20 5.54 1.50 1.31 0.19 2. 67 0. 39 0. 22 100.24 A2. II .851 .in .070 .078 .099 .093 .089, .016 .033 .003 .003 2 49. 57 9.61 5.59 4. 59 1.28 13.91 4. 90 3. 23 0. 38 none 0.65 5.98 0. 57 100. 26 A2. II .826 .094 .035 .064 .032 .248 .079 .034 .008 .042 .008 RANG 2. DOMALKALIC. KILACASE. 1 50. 41 12. 30 5. 71 3.06 8. 69 7.08 0.97 7.53 1.80 0. 46 1.47 0.46 0.15 0. 23 100. 42 2. 88 Al. I .840 .120 . 035 I .043 .217 .127 .016 .080 .018 .003 .002 .002 29° RANG 2. DOMALKALIC. KILAUASE. 1 49.13 9. 05 3. 57 5. 05 17.21 5. 68 2. 01 2. 24 3.50 0. 84 0. 42 0. 38 0.15 0.05 99. 67 Al. I .819 .088 . 022 .071 .430 .101 .032 .023 .005 .003 .002 — 2 48. 95 12.98 3.63 4.68 11. 73 7. 66 2.31 3. 96 3.16 0. 49 0. 67 0.13 , 100.35 A2. II .816 . 127 .022 .065 .293 .136 .037 .042 .006 .005 .002 3 47.32 11.22 2.91 5.81 15.96 7.11 1.88 3. 79 1.71 0.31 0.13 0. 75 0. 61 0.11 0. 22 99. 89 Al. I .789 .110 .018 l .080 .399 .127 .030 .040 .009 .004 .002 .002 SALFEMANE—LAM AROSE. 813 • ORDER 5. PERFELIC. GALLARE. SUBRANG 1. PERPOTASSIC. ORENDOSE. Inclusive. Norm. ZrO.. 0.22 ks 4.1 SO, 0.16 ac 8.8 Cl 0.06 or 55.6 di 0.9 F 0.36 hv 16.2 Cr.iO., 0.05 il 1.4 Ni'O trace tn 3.4 SrO 0.18 ap 3.7 ft 1.0 SO, 0.29 ks 4.9 Cl 0.04 Q 2.2 ns 0.2 F 0. 49 or 51.7 ac 9.2 Cr»0 3 0.07 di 1.7 SrO 0.20 hv 16.1 LioO trace il 2.2 tn 3.1 ap 3.2 ft 1.0 SO, 0.06 ks 1 .5 Cl 0.03 or 60.6 ns 1.0 F 0.44 ac 8.8 Cr 2 0 3 0.04 di 0.9 SrO 0.19 hy 10.7 LioO trace ol 4.2 il 2.6 pf 0.9 ap 4.4 ft 0.7 Locality. North Table Butte, Leucite Hills, Wyoming. 15-mile Spring, Leucite Hills, Wyoming. 15-mile Spring, Leucite Hills, W yoming. Analyst. W. F. Hille- brand. W. F. Hille- brand. W. F. Hille- brand. Reference. W. Cross, A. J. S., IV, p. 130, 1897. W. Cross, A. J. S., IV, p. 130, 1897. W. Cross, A. J. S., IV, p. 130, 1897. Author’s name. Remarks. Orendite. Orendite. Wyomingite. SUBRANG 4. DOSODIC. Q 1.4 or 8.9 ab 46. 6 an 1.7 di 18.8 hy 1.2 mt 10.4 il 5.1 hm 4.0 Front Royal, Virginia. G. Steiger. A. Keith, 14 A. R. U. S. G. S., II, p. 305, 1894. Andesite. Metamor¬ phosed. or 18.9 ab 31.4 ac 8.8 di 16.3 wo 4.4 mt 3.9 il 1.2 ap 13.8 Ahvenvaara, Kuuo- samo, Finland. N. Sahlbom. V. Hackman, B. C. G. Finl., XI, p. 36, 1900. Pyroxene- apatite- syenite. SUBRANG 2. DOPOTASSIC. PROWERSOSE. ZrOo so 3 ‘ Cl none none trace or ab an 44.5 4.2 6 . 7 di 20.4 ol 8.6 mt 5.8 Two Buttes, Prowers County, Colorado. W. F. Hille- brand. W. Cross, B. U. S. G. S., 148, Syenitic- 1am pro- s none lie 2.3 il 2.8 p. 182, 1887. phyre. NiO 0.04 hm 1.6 SrO 0.06 ap 1.0 SUBRANG 3. SODIPOTASSIC. LAMAROSE. Cr„0 3 0.39 or 12.8 di 15.0 NiO trace ab 16.8 hy 17.7 an 9.8 ol 16.9 mt 5.1 il 5.9 or 23.4 di 15.0 ab 17.8 ol 18.5 an 13.3 mt 5.1 ne 0.9 il 0.9 ap 1.7 Cr 2 0 3 trace or 22.2 di 16.4 NiO trace ab 9.4 ol 27.8 SrO 0.05 an 11.1 mt 4.2 LioO trace ne 3.4 il 1.4 ap 1.4 Bear Creek, Madison Valley, Montana. Lamar River, Yellow¬ stone National Park. Sunlight Valley, Yellowstone National Park. T. M. Chatard. L. G. Eakins. H. N. Stokes. G. P. Merrill, Pr. l\ S. Nat. Mus., XVII, p. 641, 1895. J. P. Iddings, J. G., Ill, p. 938, 1895. Hague and Jaggar, B. U. S. G. S., 168, p. 97, 1900. Basalt? Absarokite. Leucite- absarokite. Near kental- lenose. - Also in M. U. S. G. S. XXXII, p. 329, 1899. 314 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS III. SALFEMANE—Continued. RANG 2. DOMALKALIC. KILAUASE. No. Si0 2 A1 2 0 3 Fe 2 0 3 FeO MgO CaO Na 2 0 K 2 0 h 2 0+ II 2 0- C0 2 Ti0 2 PA MnO BaO Sum Sp. gr. 1 46. 87 13. 36 9. 79 2. 71 4.35 14. 70 4.64 2.01 n. d. 1.98 100. 41 A3. Ill .781 .131 .061 .038 .109 .262 .075 .021 .025 2 46. 52 10. 48 4. 40 7. 79 10. 58 9.49 3.12 1. 55 1. 79 trace 2. 98 0. 83 0.11 100.37 2. 99 Al. I .775' .103 .028 .108 . 265 .169 .050 . 016 .037 .006 .002 3 52. 85 13. 25 2.36 8. 71 6. 84 8. 47 4. 72 1.53 0. 93 0.35 0. 40 100. 41 2. 93 A2. II .881 .130 .015 .121 .171 .151 . 076 .016 .004 .003 4 49. 16 14.17 4. 62 6. 60 7.01 6. 45 4. 61 2. 23 4. 22 inH 2 0 0. 42 trace 99. 49 2. 72 A3. Ill .819 .139 .029 .092 .175 .115 .074 .023 . C05 — 5 46. 84 13. 98 8. 99 5. 46 0. 80 10.41 3.59 2. 59 2. 69 0. 47 0. 30 1.88 0. 59 1. 79 100. 38 2. 794 A2. II .781 .137 . 056 .076 .020 .186 .058 .028 • .023 .004 . 026 6 44.17 11. 24 9. 97 6. 22 6. 55 10. 77 3.04 1.97 2. 31 2. 8.3 99. 07 4 B2. Ill . 736 .110 .062 .086 .164 .193 .049 .021 .035 7 54. 53 13. 06 6. 85 4. 86 3. 14 9. 83 4. 62 1.59 1 0.52 0. 96 99. 44 2. 687 B2. Ill .909 .128 .043 .068 .078 .176 .074 .018 .012 8 53. 09 10. 87 8. 03 3. 87 8.85 9. 63 3.23 1.57 1.13 100.27 A3. Ill .885 .106 .050 .054 221 .171 .051 .017 9 49. 45 13. 97 8.10 11. 17 1.90 5.92 5. 05 1. 75 1.19 trace 0.16 0. 85 99.51 2. 74 A2. II .824 .137 .050 .156 .048 .105 .082 .019 — .001 .012 10 47. 63 15. 02 8.15 10. 40 3. 50 6. 87 4.92 1.80 0. 30 0.12 0. 08 0. 80 99. 59 2. 76 A2. II .794 .147 .051 .144 .088 .123 .079 .020 .002 .001 .011 RANG 2. DOMALKALIC. KILAUASE. 1 A2. II 41. 32 .689 to o c 15.13 .094 7. 36 .102 3.56 .089 10. 33 .184 4.19 .068 0.85 .009 4. 38 0. 20 0. 35 .004 0.97 .007 99. 59 RANG 3. ALKALICALCIC. CAMPTONASE. 1 49. 71 13.30 4. 41 3.37 7.96 8. 03 1.49 4. 81 4.07 1. 57 0. 66 0.17 0. 46 100. 01 Al. I .829 .130 .027 .048 .199 .143 .024 .051 .019 .005 . 002 .003 2 48. 36 12.42 5. 25 2.48 9. 36 8. 65 1.46 3. 97 5. 54 1.18 0. 84 0.13 0.29 99. 93 Al. I .806 .122 .033 .03* .234 .154 .023 .042 .014 .006 .002 .002 3 49. 03 15.18 2.07 6.32 6. 05 12. 58 1.49 4. 07 2.09 0. 86 0.19 99. 93 2. 743 A?3. III? .817 .149 .013 ..088 .151 .225 .024 .043 .006 .003 4 52. 35 15. 08 Trace. 8. 38 5.41 11. 12 1. 28 4.12 1.84 0. 85 trace 100. 43 2. 735 A?3. III? . 873 .147 — .117 .135 .198 .021 .043 .006 — 5 49. 63 11.90 2.64 9.16 8. 02 12. 78 . 1.08 3.58 1.27 trace trace 100. 06 2. 876 A?3. III? .827 .117 .016 .128 .201 .228 .018 .038 — — 25° SALFEMANE-ABSaROKOSE. 315 ORDER 5. PERFELIC. GALLARE—Continued. SUBRANG 4. DOSODIC. KILAUOSE. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. 1 or 11.7 ab 27.2 an 9. 7 ne 6.5 di 17.0 wo 13. 7 mt 3.2 il 3.9 hm 7.5 Birdsboro, Norristown, Pennsylvania. H. Fleck. W. C. Day, 19 A. R. U. S. G. S., VI, p. 222, 1898. Diabase. Iron oxides? CaO high? MgO low? X 0.73 Li 2 0 trace • or 8.9 ab 24.1 an 10.3 ne 1.1 di 24.6 ol 14.8 mt 6.5 il 5.7 ap 1.9 Volcano Butte, Castle Mountains, Montana. L. V. Pirsson. . Weed and Pirsson, B. U. S. G. S., 139, p. 130, 1896. Basalt. or 8.9 ab 35.1 an 10.6 ne 2.6 di 23.4 Ol 14.0 mt 3.5 il 0.6 ap 1.0 Cerro San Miguel, Puebla, Mexico. A. Hoppe. A. Hoppe, in Felix and Lenk, Btr. G. Mex., II, p. 215, 1899. Basalt. S trace or 12.8 ab 29.3 an 11.7 ne 5.1 di 16.5 ol 12.4 mt 7.5 Barenstein, Thuringia. R. Pohlmann. R. Pohlmann, N. J. B. B., Ill, p. 97, 1885. Kersantite. Not fresh. Center of dike. Cf. No. 8, ker¬ santite, Pt. II. Q 0.2 or 15.6 ab 30.9 an 14.2 di 10.1 wo 8.9 mt 13. 0 il 3.5 ap 1.3 Falkenberg, Tetsehen, Bohemia. F. Ilanusch. .1. E. Hibsch, T. M. P. M., XIV, p. 107, 1894. Nephelite- leucite- tephrite. Alkalies low? MnO high. k or 11.7 ab 15. 7 an 11.1 ne 5.4 di 33.1 ol 0.8 mt 12.1 il 5.4 hm 1.6 Mokraja Wolnowacha, Mariupol, Russia. J. Morozewicz. J. Morozewicz, cf. N. J., 1900, I, p. 394. Augitite. Sum low. Near monchi- quose. • Q 3.2 or 10.0 ab 38.8 an 10.0 di 20.0 hy 5.7 mt 10.0 il 1.8 Mount Kouragio, vEgina, Greece. A. Rohrig. H. S. Washington, J. G., Ill, p. 150, 1895. / Augi te¬ ll ypersthene- andesite. Sum low. Q 2.6 or 9.5 ab 26.7 an 10.6 di 29.0 hy 9.2 mt 11.6 Richmond, Cape Col¬ ony. Kinnicut and Birney. E. Cohen, N. J. B. B., V, p. 234, 1887. Diabase. or 10.6 ab 38.3 an 10.0 ne 2.6 di 16.4 ol 7.9 mt 11.6 Crater walls, Ivilauea, Hawaii. O. Silvestri. 0. Silvestri, B. C. G. It., XIX, p. 178, 1888. Basalt. or 11.1 ab 28.3 an 13.3 ne 7.1 di 17.5 ol 9.1 mt 11.8 Crater walls, Ivilauea, Hawaii. 0. Silvestri. 0. Silvestri, B. C. G. It., XIX, p. 181, 1888. Basalt. SUBRANG 5. PERSODIC. or 5.0 di 19.3 Gedern, Vogelsberg, J. M. Ledroit. J. M. Ledroit, Basalt. A1 2 0 3 low? ab 28.8 wo 4.9 ail 8.3 mt 21.8 Hesse. Ber. Oberh. Ges., Fe 2 0 3 high? ne 3.7 il 0.6 XXIV, p. 152, 1886. ap 2.3 SUBRANG 2. DOPOTASSIC. ABSAROKOSE. Cr»0 3 trace Cr._.0 3 trace Li._,0 trace or 28.4 di 15.6 ab 12.6 hy 12.1 an 15.2 ol 0. 5 mt 6.3 il 2.9 ap 1.6 Cache Creek, Yellowstone National Park. L. G. Eakins. J. P. Iddings, J. G., III. p. 938, 1895. Absarokite. Also in M.U. S. G. S., XXXII, II, p. 329, 1899. or 23.4 di 17.2 ab 12.1 hy 13.3 an 15.8 ol 1.6 mt 4.9 il 2.2 hm 1.9 ap 1.8 Clark’s Fork River, Yellowstone National Park. L. G. Eakins. J. P. Iddings, J. G., Ill, p. 938, 1895. Absarokite. Also in M.U. S. G.S., XXXII, II, p. 329, 1899. or 23.9 di 27.7 ab 6.3 ol 8.5 an 22.8 mt 3.0 ne 3.4 ap 2.0 Toscanella, n. Lake Bolsena, Italy. L. Ricciardi. C. Klein, Sb. Berl. Ac., 1888, p. 111. Leucite- basanite. AlsoinN. J.B.B., VI, p.23,1889. Alkalies low? or 23.9 di 22.0 ab 11.0 hy 14. 8 an 23.1 ol 2.3 ap 2.0 Mezzano, n. Lake Bolsena, Italy. L. Ricciardi. C. Klein, Sb. Berl. Ac., 1888, p. 106. Leucite- tephrite. AlsoinN. J.B.B., VI, p. 19,1889. Alkalies low? or 21.0 di 38.0 Mte. Jugo, Monte- L. Ricciardi. L. Ricciardi, Basalt. Alkalies low? ab 4.7 ol 12.0 an 17.0 mt 3.7 ne 2.6 fiascone, Italy. Att. Soc. Ital. Mil., . XXVIII, p.130,1885. 316 CHEMICAL ANALYSES OF IGNEOUS ROCKS. CLASS III. SALFEMANE—Continued. RANG 3. ALKALICALCIC. CAMPTONASE. No. Si0 2 ai 2 0 3 Fe 2 0 3 FeO MgO CaO Na 2 0 K 2 0 h 2 o+ h 2 o- co . 2 Ti0 2 PA MnO BaO Sum Sp. gr. 1 52. 37 15. 06 2. 34 9. 82 5.38 7.33 4. 04 0. 92 2. 24 0.21 0. 32 100.03 2. 965 A2. II. .873 .148 .014 .137 .135 .130 .065 .010 .003 .005 2 45.15 15. 39 2. 76 5. 64 6. 38 8. 83 2. 67 2. 77 2. 85 4.27 2.80 0. 56 0.14 100. 21 2. 70 A2. II . 756 .151 .017 .078 .160 .158 .043 .029 .035 .004 .002 3 50. 82 11.44 0.25 8. 94 14.01 8.14 1. 79 3.45 0. 58 0.59 0. 20 0.19 0. 06 100.49 Al. I .847 .112 .002 .124 .350 .145 .029 .•037 .007 .001 .003 — 4 46. 90 10.17 1.22 5.17 20. 98 6. 20 1. 16 2. 04 4. 38 1.04 0. 41 0. 44 0.10 100. 54 2. 86 Al. I .782 .100 .007 .072 .525 .110 .019 . 022 .005 .003 .001 5 49.22 12.02 2. 77 8. 80 9.29 10.56 1.90 1. 70 1.63 0. 27 0. 95 0. 43 trace 0. 03 99. 77 Al. I .820 .118 .017 . 122 .232 .189 .030 .018 .012 .003 — — 6 51.76 12. 36 4. 88 4. 60 9. 57 7.14 1.99 3. 83 3. 05 0. 47 0. 56 0. 11 100. 32 A2. II .863 .121 .030 .064 .239 .127 • .032 .040 .006 .004 .002 - 7 51.68 14. 07 4. 71 4.57 7. 72 6. 65 2. 45 4: 16 2.09 1. 08 0. 72 trace 100.03 A2. 11 .861 .138 .029 .064 .193 .119 .040 .045 .013 .005 — 8 50. 59 11.53 1. 83 7.64 11.27 8. 79 2. 27 2. 33 1.76 0.21 0. 80 0. 48 0. 17 0.10 99. 90 Al. I .843 .112 .011 .106 .282 .157 .1537 .025 .010 .003 .002 .001 9 48. 73 11.92 4. 79 4. 56 5.93 9. 24 2. 62 2. 47 1.52 5. 80 1.34 0.32 0. 36 trace 100. 05 Al. I .812 .117 .030 .064 .148 .165 .042 .026 .017 .002 .005 — » 10 47. 25 15.14 5.05 4. 95 6. 87 9. 98 2. 39 2. 60 2.12 0. 40 1. 87 1.22 0. 25 0.17 0. 08 100. 46 2. 906 Al. I .788 .148 .032 .069 .172 .178 .039 .027 .015 .002 .002 .001 2 i» 11 52. 09 11.93 1.84 7.11 12.48 7. 84 2. 04 3. 01 0. 35 0.16 0. 73 0. 34 0.15 100. 24 2. 94 Al. I .885 .117 .012 .099 .312 .140 .032 .032 .009 .002 .002 12 54. 09 15. 02 4.12 5.15 7. 28 7. 72 1.99 3.55 1.49 100.39 A3. Ill .902 .147 .025 0.72 .182 .137 .032 .038 13 50. 35 15. 76 2. 32 7.30 7.40 10.12 2. 75 3. 89 0. 45 0. 30 0. 39 0. 35 101.38 C2. IY .839 .155 .015 .101 .185 .181 .044 .041 .004 .003 .007 14 50. 00 13. 99 5.13 9.10 4. 06 10.81 3. 02 2. 87 0. 24 0. 71 0. 42 100. 35 A3. Ill .833 .137 .032 .126 .102 .193 .048 .030 .005 .006 15 54. 50 13. 67 0. 63 11.44 3.25 6.41 2. 97 3. 07 0.13 0.15 2.18 0. 46 0.21 99. 60 A2. II ^908 .134 .004 .159 .081 .114 .048 .033 .027 .003 .003 16 46. 67 12. 64 6.13 10.07 5.64 11.48 1.64 2.31 2.64 0. 74 0.19 100.49 2. 703 A3. Ill .778 .124 .038 .140 • .141 .205 .026 .024 .005 .003 11 ° 17 45. 57 13. 07 6. 72 12. 43 2. 80 6. 79 2.04 3. 36 6. 06 0.52 0.21 99. 85 2. 331 A3. Ill .760 .128 .042 .172 .070 .121 .032 .036 .004 .003 11 ° SALFEMANE-KENTALLENOSE. 317 ORDER 5. PERFELIC. GALLARE—Continued. SUBRANG 3. SODIPOTASSIC. KENTALLENOSE. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. or 5.6 ab 34.1 an 20.3 di hy of rnt 13.1 14.4 6.5 3.2 Meriden, Connecticut. J. F. Pratt. W. C. Day, 18 A. R. U. S. G. S., Y, p. 958, 1897. Diabase. LLO trace or 16.1 ab 18.9 an 22.0 ne 2.0 di ol Hit il ap 15.0 8.7 3.9 5.4 1.3 Fourmile Creek, Castle Mountains, Montana. L. V. Pirsson. Weed and Pirsson, B. U. S. G. S., 139, p. 112, 1896. Augite- vogesite. Not fresh. Cr»0 3 NiO 0.03 trace or 20.6 ab 12.6 an 12.8 ne 1.4 di ol mt il 22.3 28.6 0.5 1.1 Bet. South Boulder and Antelope Creeks, Montana. L. G. Eakins. G. P. Merrill, Pr. U. S. Nat, Mus., XVII, p. 670, 1895. Lamprophyre. Cr 2 0 3 0.33 or 12.2 ab 10.0 an 16.4 di hy ol mt il ap 9.5 13.0 30.3 1.6 0.8 1.0 Fort Ellis, n. Boze¬ man, Montana. T. M. Chatard. G. P. Merrill, Pr. U. S. Nat, Mus., XVII, p. 640, 1895. Basalt? Not fresh. so 3 Cl s SrO 0.04 0.08 0.05 0.03 or 10.0 ab 15.7 an 19. 5 di hy ol mt il ap 24.5 14.5 6.6 3.9 1.8 1.0 Red Mountains, Montana. H. N. Stokes. W. H. Weed, J. G., VII, p. 739, 1899. Gabbro. Contact facies of granite. or 22.2 ab 16.8 an 13.6 di hy mt il ap 14.4 21.0 7.0 0.9 1.4 Raven Creek, Yellowstone National Park. L. G. Eakins. J. P. Iddings, J. G., Ill, p.938,1895. Absarokite. Also in M. U. S. G.S. XXXII, p. 329, 1899. SO., LLO 0.13 trace or 25.0 ab 21.0 an 14. 7 di hv of mt il ap 11.7 13.1 2.7 6.7 2.0 1.7 Two Ocean Pass, Yellowstone National Park. J. E. Whitfield. J. P. Iddings, M.U. S.G.S., XXXII, p. 329,1899. Absarokite. SO, Cl V,0, NiO SrO Li.,0 none trace 0.04 0.06 0.03 trace or 13.8 ab 19.4 an 13.9 di hy ol mt il ap 22.4 8.7 14.1 2.6 1.5 1.0 Indian Creek lac¬ colith, Yellowstone National Park. W. F. Hille- brand. J. P. Iddings, M.U.S.G.S., XXXII, p. 83,1899. Augite- andesite. Lower part of sheet; cf. No. 12, monzon- ose. so 3 Cl Li.,0 0.34 0.11 trace Q 1.4 or 14.5 ab 22.0 an 13.6 di hy mt il 25.6 5.0 7.0 2.5 Bighorn Pass, Yellowstone National Park. J. E. Whitfield. J. P. Iddings, M.U.S.G.S., XXXII, p. 70,1899. Kersantite. Not fresh. S V.0 3 NiO SrO Li 2 0 none 0.05 0.02 0.05 trace or 15.0 ab 17.8 an 22.8 ne 1.4 di ol mt il 21.4 7.2 7.4 2.3 Snowstorm Peak, La Plata Mts., Colorado. W. F. Hille- brand. W. Cross, B. U. S. G. S., 1698, p.162,1900. Camptonite. Not fresh. Cr 2 0 3 NiO 0.10 0.07 or 17.8 ab 16.8 an 14.7 di 19.4 hy 14.9 ol 12.3 mt 2.8 il 1.4 Glen Shira, Argyllshire, Scotland. W. Pollard. . Hill and Kynaston, Q. J. G. S., LVI, p. 537,1900. Kentallenite. Q 2.3 or 21.1 ab 16.8 an 21.4 di hy mt 13.5 17.9 5.8 Ben an Fhurain, Inchnadampf, Scotland. . J. J. H. Teall. J. J. H. Teall, G.M., XXIII,p. 350, 1886. Diorite- porphyrite. Near shoshon- ose. or 22.8 ab 11.0 an 18. 3 ne 6.5 di ol mt il ap 23.6 13.1 3.5 0.6 1.0 Smiilingen, Fahlun, Sweden. L. Schmelck. W. C. Brogger, Eg. Kg. II, p. 46,1895. Olivine- monzonite. Sum high. so 3 Cl trace trace or 16.7 ab 22.0 an 16.4 ne 1.7 di ol mt ap 26.8 6.8 7.4 1.7 Lava of 1891, Stromboli, iEolian Islands. L. Ricciardi. Ricco and Mercalli, Ann. Uff. Meteor, XI, p.202,1892. Basalt. Cl s 0.12 0.25 Q 3.3 or 18.3 ab 25. 2 an 14. 7 di hy mt il ap 12.0 19.0 0.9 4.2 1.1 Goroschki, Volhvnia, Russia. W. Tarassenko. W. Tarassenko, cf. N. J., 1899,1, p. 463. Pyroxene- syenite. Cr,0 3 0.34 or 13.3 ab 13.6 an 20.6 di hv of mt ap 26.4 8.3 4.5 8.8 1.7 Assab, n. Massowa, Abyssinia. L. Ricciardi. L. Ricciardi, B. Soc. G. Ital., V, p. 58,1886. Basalt. Cr 2 0 3 0.28 • or 20.0 ab 16.8 an 16.7 di 11.4 hy 14.6 ol 2.9 mt 9.7 ap 1.3 Assab, n. Massowa, Abyssinia. L. Ricciardi. L. Ricciardi, B.Soc.G. Ital., V, p. 59,1886. Basalt. Not fresh. 318 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS III. SALFEMANE—Continued. RANG 3. ALKALI CALCIC. CAMPTONASE. ' No. Si0 2 A1A Fe 2 0 3 FeO MgO CaO Na 2 0 K 2 0 h 2 o+ H 2 0- co 2 Ti0 2 PA MnO BaO Sum Sp. gr. 1 43. 94 16.17 3.96 10. 06 5. 05 9. 59 2.93 1.51 1.42 0.13 0.09 4.13 0. 69 trace none 99. 67 A2. II .732 .159 .025 .140 .126 .171 .047 .016 .052 .005 — 2 42. 73 14. 50 4.03 7. 28 5. 46 8. 46 3.11 2. 28 3. 08 0. 36 3. 76 4. 30 0. 93 0. 19 trace 100. 65 Al. I .713 .142 . 025 .101 .137 .151 .050 .023 .054 .006 .003 — 3 48. 22 14. 27 2. 46 9.00 6. 24 8. 45 2. 90 1.93 1. 66 0. 28 0.15 2. 79 0. 64 0.20 0. 04 99. 80 Al. I .804 .140 .015 .125 .156 .151 .047 .020 .035 .004 .003 — 4 47.12 14. 43 3.33 11.71 6. 05 9. 63 2. 58 1. 11 0. 34 0. 28 3. 27 99. 85 3. 072 A2. II .785 .142 .021 .163 .151 .172 .042 .012 .041 12° 5 52. 37 15. 06 2. 34 9. 82 5.38 7.33 4. 04 0. 92 2. 24 0. 21 0. 32 100. 03 A2. II .873 .147 .015 .137 .135 . .130 .065 .010 .003 .005 6 47.16 14. 45 1.61 13.81 5.24 8. 13 3. 09 1.20 0.48 0.12 0. 35 3. 37 0.57 0. 24 trace 99.98 Al. I . 786 .142 .010 .192 .131 .144 .050 .013 .042 .004 .003 — 7 46. 74 16. 63 2.17 10. 60 6.11 8. 66 3.81 0. 86 0. 73 0.12 0. 07 2.54 0. 33 0. 26 trace 99. 77 Al. I .779 .163 .014 .147 .153 .154 .061 .009 .032 .002 .004 — 8 44. 77 12. 46 4. 63 12. 99 5.34 10. 20 2. 47 0.95 0. 48 0.12 0. 37 5. 26 0. 28 0.17 trace 100. 75 3. 090 Al. I .736 .122 .029 .180 .134 .182 .040 .010 .064 .002 .002 — 9 50. 34 15. 23 2. 82 11.17 5. 81 9.61 2. 93 1.02 0. 07 0.19 1.56 0. 20 0.14 101.09 2. 968 B2. Ill .839 .149 .018 .155 .145 .172 .047 .011 .019 .001 .002 10 48.11 14. 74 2. 54 11.85 5.10 6. 72 2. 92 1.92 1. 73 0. 27 3.17 0. 44 0.19 0. 04 99,96 Al. 1 .802 .144 .015 .165 ■ .128 .120 .047 .020 .040 .003 .003 11 48.85 15. 83 2. 50 10. 79 5. 82 6. 20 2. 79 1.31 3. 77 0. 27 none 1.28 0. 22 0.11 none 99. 89 Al. 1 .814 .155 .016 .150 .146 .110 .045 .014 .016 .002 .002 12 45. 65 15. 20 6. 71 13. 81 2. 95 6. 33 3. 09 1.05 2. 29 1.66 0. 25 0. 71 none 99. 70 Al. 1 .761 .149 .042 .192 .074 .112 .050 .011 .021 .002 .010 • 13 48.47 16. 07 4.12 7. 47 5.96 4. 84 2. 43 1.41 4. 63 2. 30 1.51 0. 44 0. 23 0. 03 100.15 Al. I .808 .157 .026 .104 .149 .086 .039 .015 .019 .003 .003 14 53. 56 16. 07 3. 21 5.29 7.23 8. 77 3. 06 1.94 0.19 0. 68 0.18 0.11 100. 29 * A2. II .893 .158 .020 .073 .181 .157 .049 .021 .008 .001 .002 15 51.81 15. 24 3. 66 4. 86 8. 89 9. 06 2.83 2. 08 0. 67 0. 77 0.18 0. 08 100.13 A2. II .864 .149 .023 .068 . 222 .162 .045 .022 .010 .001 .001 16 51. 70 15.18 2.09 8. 54 8.18 8. 73 2.31 1.81 0.16 1.24 0.21 trace 100. 24 Al. I .862 .149 013 .119 .205 .155 .037 .020 .015 .002 — • SALFEMANE-CAMPTONOSE. 3H> ORDER 5. PERFELIC. GALLARE—Continued. SUBRAN(4 4. DOSODIC. CAMPTONOSE. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. or 8.9 ab 19.9 an 26.7 ne 2.6 di 16.0 : ol 9.4 | mt 4.8 [ il 8.0 1 ap 1.6 1 Locke’s Hill, Mount Belknap, New Hampshire. H. S. Washing¬ ton. Not published. Hornblende- gabbro. Cl s NiO CuO trace 0.18 trace none or 12.8 ab 21.0 an 19.2 ne 2.8 di 16.9 ol 6.8 mt 5.8 il 8.3 ap 2.5 Mount Gunstock, Mount Belknap, New Hampshire. H. S. Washing¬ ton. Not published. Camptonite. Not fresh. so 3 Cl F FeSj NiO none 0.10 0.05 0.36 0.03 or 11.1 ab 24.6 an 20.3 di 15.1 hv 9.2 ol 6.4 mt 3.5 il 5.4 ap 1.3 Mount Ascutney, Vermont. W. F. Hille- brand. R. A. Daly, B. U. S. G. S., 148, p. 70,1897. Camptonite. or 6.7 ab 22.0 an 24. 5 di 19.3 hv 7.3 ol 8.6 mt 4.9 il 6.3 Rockport, Cape Ann, Massachusetts. H. S. Washing¬ ton. H. S. Washington, J.G., VII, p.289,1899. Diabase. or 5.6 ab 34.1 an 20.0 di 13.5 hy 14.6 ol 6.2 mt 3.5 Middlefield, Connecticut. J. H. Pratt. H. E. Gregory, B.U. S. G.S.,165, p. 176,1900. Diabase. S Cr»0 3 NiO SrO Li 2 0 0.14 trace 0.02 trace trace or 7.2 ab 26.2 an 22.0 di 12.5 hv 8.1 ol 12.8 mt 2.3 il 6.4 ap 1.3 Elizabethtown, Essex County, New York. W. F. Hille- brand. J. F. Kemp, B.U.S. G.S.,168, p. 37,1900. Norite. S Cr 2 0 3 NiO SrO Li 2 0 0.11 trace 0.03 trace trace or 5.0 ab 26.2 an 25.0 ne 3.1 di 14.9 ol 15.9 mt 3.2 il 4.9 Elizabethtown, Essex County, New York. W. F. Hille- brand. J. F. Kemp, B. U. S. G. S., 168, p. 37,1900. Norite. Derived from No. 9, auver- gnose by pressure. S NiO 0.26 trace or 5.6 ab 21.0 an 19.5 di 25.9 hy 4.0 ol 5.9 mt 6.7 il 9.9 Lincoln Pond, Essex County, New Tork. G. Steiger. J. F. Kemp, 19 A. R.U. S.G.S., III, p.407,1899. Gabbro. or 6.1 ab 24.6 an 25.3 di 18.7 hy 12.8 ol 5.9 mt 4.2 il 2.9 Rocky Hill, New Jersey. A. H. Phillips. A. H. Phillips, A. J.S., VIII, p. 279,1899. Basalt. Sum high. FeSo. Cr»0 3 v 2 o 3 NiO Sr© Li.,0 0.13 0.01 0.03 0.03 0.02 trace or 11.1 ab 24.6 an 21.4 di 7.9 hy 17.3 ol 4.5 mt 3.5 il 6.2 ap 1.0 Limestone Cove, Unicoi County, Tennessee. W. F. Hille- brand. A. Keith, B. U. S. G. S., 168, p. 59,1900. Gabbro. S0 3 SrO 0.06 0.09 or 7.8 ab 23.6 an 26.7 di 3.2 hy 26.4 ol 1.7 mt 3.7 il 2.4 Marquette district, Michigan. G. Steiger. C. R. Van Hise, B.U.S. G.S.,148, p. 98,1897. Altered greenstone (diabase). Not described. SrO none or 6.1 ab 26.2 an 24.5 di 5.2 hy 19.5 Ol 1.7 mt 9.7 il 3.2 Duluth, Minnesota. A. N. Winchell. A. N. Winchell, A. G.,NXVI, p.293,1900. Orthoclase- gabbro. FeS., NiO SrO Li 2 0 ]• Cu 0.24 trace trace trace trace Q 6.2 or 8.3 ab 20.4 an 23.9 C 1.7 hy 22.8 mt 6.0 il 2.9 Black Jack Mine, Silver City, Idaho. W. F. Hille- brand. i W. Lindgren, 20 A. R. U. S. G. S., Ill, p. 176, 1900. Diabasic basalt. Not fresh. Q 0.1 or 11.7 ab 25.7 an 24.5 di 15.6 hy 16.5 mt 4.6 il 1.2 Hurricane Ridge, Crandall Basin, Yell. Nat. Park. L. G. Eakins. J. P. Iddings, M. U. S. G. S., XXXII, p. 260, 1899. Mica-gabbro- porphyry. Near andose. or 12.2 ab 23.6 an 22.8 di 17.6 hy 10.4 ol 5.9 mt 5.3 il 1.5 Hurricane Ridge, Crandall Basin, Yell. Nat. Park. L. G. Eakins. J. P. Iddings, M. U. S. G. S., XXXII, p. 260, 1899. Gabbro- porphyry. Cl s trace 0.09 or 11.1 ab 19.4 an 25.6 di 14.3 hy 20.8 Ol 3.6 mt 3.0 il 2.3 Dunraven Peak, Yellowstone National Park. F. A. Gooch. J. P. Iddings, B. U. S. G. S., 148, p. 135, 1897. ’ Basalt. 320 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS III. SALFEMANE—Continued. RANG 3. ALKALICALCIO. CAMPTOXASE—Continued. No. SiOj A1A Fe,0 3 FeO MgO CaO Na 2 0 K 2 0 h 2 o+ H 2 0- co 2 Ti0 2 PA MnO BaO r Sum Sp. gr. 17 50. 72 16.01 4. 35 4. 20 7. 06 9. 02 2.92 1.13 2.14 0. 40 0.85 1.08 0.29 0.07 0.11 100.44 Al. I .845 . 157 .027 .058 .187 .160 .047 .012 .013 .002 .001 .001 18 47. 28 11.56 3. 52 5. 71 13.17 9.20 2. 73 2.17 2. 96 0. 88 0. 59 0.13 100. 08 A2. II .788 .113 .022 .079 .329 .164 .043 .023 .011 .004 .002 19 48. 35 15. 47 4. 80 7. 58 8.15 8.81 3.09 0.95 0. 73 0. 28 1. 33 0. 33 0. 21 0. 06 100.26 2. 970 Al. I .806 .152 .030 .106 .204 .157 .050 .010 .016 .002 .003 — 21°. 5 20 43. 98 13. 30 3. 67 6. 92 7.03 10. 66 2.15 1.64 1.52 0. 42 6. 46 1. 18 0.32 0. 22 0. 06 100.15 2. 912 Al. I .733 .130 .023 .096 . 176 ' .190 .035 .017 .015 .002 .003 — 19°. 5 21 54. 56 16. 04 0. 95 6. 07 8. 71 8.89 3. 05 1.18. 0. 28 0.53 0.18 0.17 0. 03 100.38 Al. I .909 .157 .006 .085 .218 .159 -.049 .013 .007 .001 .002 — 22 53.46 14.81 2. 60 5.15 7.27 8.44 2. 60 1.30 2.13 0.12 0. 44 0. 70 0.16 0.18 0. 05 99. 76 Al. I .891 .145 .016 .072 .182 .150 .042 .014 .009 .001 .003 — 23 51.27 12. 14 2.51 6. 71 10. 88 10. 32 2. 00 1.63 1.16 0.17 0. 60 0.21 0.21 0. 07 99. 92 Al. I .855 .119 .015 .093 .272 .184 .032 .017 .008 .002 .003 .001 24 54. 64 12.09 1.81 5.03 11.86 7. 74 2.35 1.01 2.44 0.12 none 0. 61 trace 0.13 0.05 100. 01 Al. I .911 .119 .011 .070 .297 .138 .038 .011 .008 — .002 — 25 50. 66 13.97 2. 55 10. 20 4. 45 8. 08 3.32 1.95 0. 43 0. 27 none 2.39 1.01 0. 29 0. 22 99.81 Al. I .844 .137 .016 .141 .in .144 .053 .020 .030 .007 .004 .002 26 47. 91 14.26 1.65 7.80 10. 83 9. 60 3.01 1.89 0.37 2. 70 trace 100. 02 A2. 11 .799 .140 .010 .108 .271 .171 .048 .020 .034 ' a 27 45.30 14. 95 1.98 9. 32 8. 29 8. 87 4. 27 1.27 0. 85 2. 66 2. 23 trace 99. 99 A2. II . 755 .147 .012 .129 .207 .159 .069 .013 .033 .015 — 28 49. 83 15. 11 9. 78 2. 57 7. 55 8. 92 2. 84 1.32 1.00 0. 09 0.16 0.17 0. 05 none 100.11 Al. I .831 .148 .061 .036 .189 .159 .045 .014 .002 .001 .001 — 29 49.12 13. 82 6. 76 12.53 3.19 8. 70 2. 49 1.26 0. 78 0. 80 0. 08 99. 53 A2. II .819 .135 .042 .174 .080 .155 .040 .014 .010 .001 30 52. 47 12.15 3.47 5.23 9. 94 9. 71 2.81 2. 26 1.62 0. 54 100. 20 A3. Ill .875 .119 .022 .072 .249 .173 .045 .024 31 47. 45 14. 83 2. 47 14. 71 5.00 8. 87 2.97 0. 99 1.00 0. 36 1.47 100.12 A3. Ill .791 . 145 .015 .204 .125 • .159 .048 .011 0.18 32 51.22 14.06 4. 32 8. 73 4. 42 8. 33 2. 55 1.25 1.28 — 0.19 2. 42 0. 25 0.16 99. 67 2.98 A2. II .854 .138 .027 .121 .111 .148 .042 .014 .030 .002 .002 33 50. 71 14. 78 3. 52 8. 95 5.90 8.21 2. 76 1.39 1. 78 0.25 1.92 0. 31 100. 48 2. 944 A2. II .845 .145 .022 .125 .148 .146 .044 .015 . 023 .004 SALFEMANE-CAMPTONOSE. 321 ORDER 5. PERFELIC. GALL ARE—Continued. SUBRANG 4. DOSODIC. CAMPTONOSE—Continued. Inclusive. Norm. Cr,0 3 none Q 1.7 di 14.0 NiO none or 6.7 by 14.3 SrO 0.09 ab 24. 6 nit 6.3 LioO trace an 27.2 il 2.0 Cl 0.18 or 12.8 di 17.9 ab 15. 2 ol 21.8 an 19.5 mt 5.1 lie 4.0 il 1.7 ap 1.4 ZrO., none or 5.6 di 14.. 7 so 3 0.07 ab 26.2 hy 6. 7 s trace an 25.6 ol 10.5 Cr 2 0 3 trace mt 7.0 NiO 0.02 il 2.5 SrO 0.03 FeS 2 0.54 or 9.5 di 25.5 NiO 0.03 ab 15.7 ol 9.3 SrO 0.05 an 21.7 mt 5.3 LioO trace ne 1.4 il 2.3 Cr 2 0 3 trace or 7.2 di 14.4 SrO trace ab 25.7 hy 22.9 LioO trace an 26.4 ol 1.3 mt 1.4 il 1.1 FeSo 0.26 Q 5.2 di 13.9 NiO 0.05 or 7.8 hy 17.7 SrO trace ab 22.0 mt 3.7 LioO trace an 24.7 il 1.3 NiO 0.04 or 9.5 di 25.4 SrO trace? ab 16.8 hy 16.5 LioO trace an 19.5 of .5.7 mt 3.5 il 1.2 NiO 0.05 Q, 3.6 di 15.3 SrO trace or 6.1 hy 29.3 LioO trace ab 19.9 mt 2.6 an 19.5 il 1.2 Cl 0.02 or 11.7 di 14.0 NiO trace ab 27.8 hy 17.9 SrO trace an 17.5 mt 3.7 LioO trace il 4.6 ap 2.2 LioO trace or 11.1 di 19.9 ab 15.2 ol 18.7 an 22.8 mt 2.3 ne 5.4 il 5.3 or 7.2 di 7.7 ab 25. 2 ol 20.4 an 20. 9 mt 2.8 ne 6.0 il 5.1 ap 5.0 Zr0 2 none Q 2.3 di 15.0 Cl 0.02 or 7.8 hy 12.0 s none ab 23.6 mt 8.4 CoO 0.64 an 25.0 hm 4.0 Cu 0.05 Pb 0.01 Q 3.4 di 17.4 or 7.8 hy 15.4 ab 21.0 mt 9.7 an 22.5 il 1.5 or 13.3 di 28.2 ab 23.6 hy 5.4 an 13.9 ol 8.6 mt 5.1 or 6.1 di 17.1 ab 25.2 hy 1.8 an 23.9 ol 18.4 mt 3.5 il 2.8 FeS 2 0.49 Q 6.8 di 14.9 or 7.8 hy 12.3 ab 22.0 mt 6. 3 an 22.8 il 4.6 Q 1.9 di 13.7 or 8.3 hv 18.7 ab 23.1 mt 5.1 an 23.9 il 3.5 Locality. Eagle Creek, Yellowstone National Park. Ishawooa Canyon, Wyoming. San Rafael Flow, Colfax County, New Mexico. Indian Trail Ridge, La Plata Mountains, Colorado. Cinder Cone, California. Near Sonora, Tuolumne County, California. Milton, Sierra County, California. Near Table Mountain, Butte ( ountv, California. Oroville, Table Moun¬ tain, Butte County, California. American Flat Creek, Washoe, Nevada. Near Mount Trum¬ bull, Arizona. Mazaruni District, British Guiana. Cape Weissenfels, King Charles Land, Spitzbergen. Inchnadampf, Assvnt, Scotland. Scourie, Sutherlandshire, Scotland. Whin Sill, Durham, England. Whin Sill, Northumberland, England. 14128 — No. 14—03 - 21 Analyst. H. N. Stokes. J. E. Whit¬ field. W. F. Hille- brand. W. F. Hille- brand. W. F. Hille- brand. W. F. Hi lie- brand. W. F. Hille- brand. W. F. Hille- brand. W. F. Hille- brand. S. L. Penfield. L. G. Eakins. J. B. Harrison. N. Sahlbom. J. J. H. Teall. J. J. H. Teall. J. J. H. Teall. J. J. H. Teall. Reference. Author’s name. Remarks. Hague and Jaggar, B. IJ. S. G. S., 168, p. 97, 1900. Llornblende- pyroxene- andesite. A. Hague, A. J. S., XXXVIII, p. 46, 1889. Leucite- phonolite. Leucite-absaro- kite, in J. P. hidings, J.G., III, p. 938, 1895. W. Cross, B. U. S. G. S., 168, p. 171, 1900. Plagioclase- basalt. W. Cross, B. U. S. G. S., 168, p. 163, 1900. Camptonite. Not fresh. J. S. Diller, B. U. S. G. S., 79, p. 29, 1891. Quartz-basalt. Dried at 105°. H. W. Turner, 17 A. R. U. S. G. S., I, p. 731, 1896. Diorite. Near andose. IT. W. Turner, 17 A. R. U. S. G. S., I, p. 734, 1896. Diabase- porphyry. H. W. Turner, 17 A. R. U.S.G. S.,I, p. 731, 1896. Quartz-diorite. H. W. Turner, 14 A. R. U. S. G.S.,11, p. 491, 1894. Basalt. Hague and Iddings, B. U. S. G.S.,17, p. 33, 1885. Basalt. B. U. S. G. S., 148, p. 188, 1897. Lava., Not described. J. B. Harrison, Priv. contrib. Epidiorite. “Altered gab- bro.” A. Hamberg, G. F. F., XXI, p. 523, 1899. Basalt. J. J. H. Teall, G. M., XXIII, p. 350, 1886. J. J. LI. Teall, Q. J. G. S., XLI, p. loo, 1885. Diorite. Dolerite. “Plagioclase- p y roxe n e- horn blende rock.” J. J. H. Teall, Q. J. G. S., XL, p. 654, 1884. Diabase. Dried at 110°. J. J. H. Teall, Q. .T. G. S., XL, p. 654, 1884. Diabase. Dried at 110°. 322 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS III. SALFEMANE—Continued. RANG 3. ALKALICALCIC. CAMPTONASE—Continued. No. Si0 2 A1A Fe-A FeO MgO CaO Na,0 k 2 o h 2 o+ H 2 0- co 2 Ti0 2 PA MnO BaO Sum Sp. gr. 34 47. 90 16. 55 5. 67 7.50 4. 44 9. 35 3. 23 2. 08 0. 20 1.91 0. 32 0. 60 99. 75 A3. Ill .798 . 162 .035 .104 .ill .167 . 045 .022 .023 .002 .009 35 45. 55 15. 40 2. 43 9.12 5. 20 7.70 4. 54 2.04 2. 35 2.15 4.45 100. 93 B2. Ill . 759 .151 .015 .127 .130 .137 .063 .022 .056 36 44. 22 12. 73 5. 68 5.18 6. 98 11.57 2.12 1.71 2. 74 3. 66 2.50 1.05 0. 45 100. 59 A2. II .737 .125 .036 .072 .175 .207 .034 .018 .031 .008 .006 • 37 51. 23 12. 70 4.00 10. 48 6.51 8. 40 3.04 1.55 0. 39 1.21 0.19 trace 99. 70 A2. II .854 . 124 .025 .146 .163 .150 .049 .017 .015 .001 — 38 50.15 15. 02 5.17 5.17 6. 90 8. 25 2. 59 1.33 4. 08 0.32 0. 33 0. 26 99. 66 2. 753 A2. II .836 .147 .032 .072 .173 .147 .042 .014 .004 .002 39 47.67 14. 83 5. 01 6. 34 5. 50 9.31 3. 49 1.57 1.91 0. 83 2.56 0. 20 0. 08 100.16 2. 994 Al. I .795 .145 .031 .088 .138 .166 .056 .017 .032 .001 .001 26° 40 46.19 12.15 3. 28 7. 81 11.65 8.53 3.05 2.02 2. 63 0.18 2. 01 1.03 100.53 2. 92 A2. II .770 .119 .021 .108 .291 .151 .049 .021 .025 .007 41 48. 89 13. 66 3. 64 1 7.44 8. 83 8. 68 3.14 1.20 2. 59 1. 76 0.39 100. 29 2. 876 A2. II .815 .134 .022 .103 .221 . 155 .050 .013 .022 .003 42 50. 22 15.31 4.87 6.54 7.13 8. 72 3. 02 1.68 2. 78 0. 54 100. 91 A3. Ill .837 .150 .030 .091 .178 . 155 .048 .018 .004 43 49. 56 16. 32 3.69 6. 97 7. 50 8:83 2.91 1.87 2. 36 100.08 2.88 A3. Ill .826 .160 .023 .097 .188 .157 .047 .020 44 49. 97 16. 38 3. 62 6. 76 7. 50 8. 95 3. 22 1. 55 2.18 100.19 2. 84 A3. Ill .833 .160 .022 .094 .188 .160 .052 .017 45 49. 55 14.97 4. 78 6. 90 7.36 8.57 3.47 2.27 2. 09 99. 96 2. 91 A3. Ill ,826 .146 .030 .096 .184 .153 .056 .024 46 49. 08 13. 43 6. 49 5. 92 9.58 8. 92 3. 42 1.00 0. 32 1.82 0. 51 100. 49 A2. II .818 .132 .040 .082 .240 .159 . 055 .011 .023 .004 47 48.39 12. 07 8.23 7. 82 8. 48 8.81 2. 67 0. 90 1.81 0.36 0.25 0.97 100. 76 A2. II .807 .118 .051 .108 .212 .157 .043 .010 .003 .007 48 48. 41 16. 24 4.89 6.41 7.25 9. 38 3. 23 2. 33 2.11 trace 100. 25 A3. Ill .807 .159 .031 .089 .181 .168 .051 .024 — 49 54. 73 14. 02 2. 34 4. 92 7.40 10. 20 2. 98 2. 67 1.23 trace trace 100.49 A3. Ill .912 .137 .014 .068 .185 .182 .048 .028 -— — 50 45. 75 15. 85 7.40 5.82 6. 90 7.20 3. 44 1.33 3.20 1.68 0. 55 0. 31 99. 61 A2.II . 763 .155 .046 .080 .173 .128 . 055 .014 .021 .004 .004 S ALFEM ANE-0 A M PTONOSE. 323 ORDER 5. PERFELIC. GALLARE—Continued. SUBRANG 4. DOSODIC. CAMPTONOSE—Continued. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. or 12.2 ab 23.6 an 26.4 di by ol rat il 16.7 4.2 3.4 8.1 3.5 Tofteholmen, Christiania Fjord, Norway. V. Schmelck. W. C. Brogger, Eg. Kg., Ill, p. 83, 1899. Essexite. or 12.2 ab 22.0 an 18.3 ne 6.0 di ol rat il 16.3 9.1 3.5 8.6 Hvinden, Gran, Norway. L. Schmelck. W. C. Brogger, Eg. Kg M III, p. 60, 1899. Camptonite. or 10.0 ab 17.8 an 20.3 di hv ol nit il ap, 24.0 4.7 3.1 8.4 4.8 2.5 Kj dse-Aklungen, Norway. V. Schmelck. W. C. Brogger, Eg. Kg., Ill, p. 51, 1899. Camptonite. or 9.5 ab 25.7 an 16.1 di hy ol mt il 21.0 15. 3 3.5 5.8 2.3 Halleborg, Sweden. A. Merian. A. Merian, N. J. B. B.,Ill, p. 289, 1885. Diabase. so 3 0.09 Q 3.2 or 7.8 ab 22.0 an 25.3 di hy mt il 12.4 16.2 7.4 0.6 Hbringen, Pfalz. K. Kliiss. A. Leppla, Jb. Pr.G. L.-A., XIV, p. 150, 1894. Melaphyre. X so 3 Cl 0.66 0.05 0.15 or 9.5 ab 28.3 an 20.0 ne 0.6 di ol mt il 20.7 5.5 7.2 4.8 Hirzstein, Habichtswald, Nassau. O. Fromm. O. Fromm, Z. D. G. G., XLIII, p. 70, 1891. Basalt. so 3 trace or 11.7 ab 19.9 an 13.6 ne 3.1 di ol mt il ap 17.7 20.9 4.9 3.7 2.3 Breitenberg, Bl. Altmorschen, Prussia. Not stated. F. Bevschlag, Erl. G. Kt. Preuss., Bl. Altmorschen, p. 24, 1891. Basalt. so 3 0.07 or 7.2 ab 26.2 an 19.7 di hy ol mt il ap 16.5 7.3 12.1 5.1 3.4 1.0 Gangolfsberg, Rhongebirge. Haefcke. H. Proescholdt, Jb. Pr. G. L.-A.,XIV, p. 12, 1894. Dolerite. Cl 0.10 or 10.0 ab 25.2 an 23.4 di hy ol mt ap 13.1 14.4 3.8 7.0 1.3 Eisenberg, Hesse. H. Wolff. K. Oebbeke, Jb. Pr. G. L.-A., IX, p. 395, 1889. Basalt. Cl 0.07 or 11.1 ab 24.6 an 25.9 di hy ol mt; 14.6 2.4 13.8 5.3 Eisenberg, Hesse. H. Wolff. K. Oebbeke, Jb. Pr. G. L.-A., IX, p. 394, 1889. Basalt. Cl 0.06 or 9.5 ab 27. 2 an 25.3 di hy ol mt 15.8 0.8 14.4 5.1 Krotenkopf, Hesse. H. Wolff. K. Oebbeke, Jb. Pr. G. L.-A., IX, p. 393, 1889. Basalt. • or 13.3 ab 24.1 an 18.3 ne 2.8 di ol mt 19.5 12.9 7.0 Hohebaum, Lottersberg, Hesse. H. Wolff. K. Oebbeke, Jb. Pr. G. L.-A., IX, p. 397, 1889. Basalt. t or 6.1 ab 28.8 an 18.3 di hy Ol mt il ap 17.6 8.3 7.0 9.3 3.5 1.3 Londorf, Vogelsberg, Hesse. A. Streng. A. Streng, N. J., 1888, II, p. 211. Dolerite. Q 1.3 or 5.6 ab 22.5 an 18.1 di hy mt ap 15.7 21.0 11.8 2.3 Laubach, Vogelsberg, Hesse. J. M. Ledroit. J. M. Ledroit, Ber. Oberh. Ges., XXIV, p. 151,1886. Basalt. or 13.3 ab 19.4 an 23.3 ne 4.0 di ol mt 19.3 11.7 7.2 Der Sabbel, Hesse. Krauss. K. Oebbeke, Jb. Pr. G. L-A., IX, p. 410, 1889. Nephelite- basanite. or 15.6 ab 25.2 an 17.0 di 27.0 hy 12.2 mt 3.2 Topla, S. Carinthia. H. V. Graber. H. V. Graber, Jb. G. R-A. Wien., XLV1I, p. 278,1897. Basic concretion in granite. s 0.18 or 7.8 ab 28.8 an 23.8 di 6.9 hy 7.7 ol. 5.6 mt 10. 7 il 3.3 ap 1.3 Steinberg, Salzkammergut, Tyrol. C. v. John. C. v. John, Jl>. G. R-A. Wien., XLIX, p. 252,1899. Gabbro. Remarks. Not fresh. Not fresh. S0 3 for S? SO g for S. Dried at 100°. Near kentallen- ose. 324 CHEMICAL ANALYSES <>E IGNEOUS HOCKS CLASS III. SALFEMANE—Continued. RANG 3. ALKALICALCIC. CAMPTOffASE—Continued. No. Si0 2 A1A Fe 2 0 3 FeO MgO CaO Na 2 G K 2 0 h 2 0+ h 2 o- C0 2 Ti0 2 PA MnO BaO Sum Sp. gr. 51 53. 04 13.06 8. 19 2.40 5.17 10. 61 3. 27 2.06 2.21 0. 56 0.16 100. 73 A3. Ill . 884 .128 .051 .033 .129 .189 .057 . 022 .004 .002 52 48. 64 11. 68 10. 57 6.31 6. 78 10. 88 2.90 1.01 1.02 0. 39 100.18 A3. Ill .811 .115 .066 .088 .170 .194 .047 .011 .006 53 49. 97 14. 22 8.14 3. 79 4.14 11.21 2. 79 2.39 3. 50 trace 100.15 2.976 A3. Ill .833 .139 .051 .053 .104 .200 .045 .025 — 54 47. 73 13.33 0.68 14.99 5. 63 7.41 2. 77 1. 17 0.11 4. 04 0.61 0.30 99.13 B2. Ill . 796 .131 .004 .208 .141 .132 .045 .012 .050 .004 .004 55 % 47. 34 14. 03 0. 80 17.20 2. 24 6.89 2. 74 2. 34 0. 05 4.17 1.07 0. 21 99. 48 A2. II .789 .137 .005 .239 . 056 .123 .044 .025 .052 .008 .003 56 46. 30 13. 44 4.11 12. 61 4. 42 11.88 2.13 1.94 3.02 0. 59 0. 22 100. 92 2. 401 B2. Ill .772 .132 .026 .175 .ill .212 .034 .020 .004 .003 11° 57 51. 68 13. 88 6. 59 4. 44 7. 87 10. 99 2. 93 0, 81 0. 74 99. 93 A3. Ill .861 1.36 .041 .061 .197 .196 .047 .009 58 49. 80 13. 76 3.09 11.97 5.02 10. 25 3. 00 1.15 trace .• ' 0. 95 0. 22 0.10 99. 31 B2. Ill .830 .135 .020 .167 .125 .183 .048 .013 .012 .002 .001 59 48.04 14. 62 9.18 11. 68 2.17 7. 66 4. 00 1. 28 none trace 0. 45 1.91 100. 99 2. 78 B2. Ill .801 .143 . 057 .162 .054 .136 .064 .014 .003 .027 60 47. 61 16. 09 7.00 10. 60 3.10 8.15 2. 98 1.15 0. 70 0. 39 trace 1.72 99. 49 2. 93 B2. Ill .794 .157 .044 • 147 .078 .145 .048 .013 .005 — .024 61 45. 79 15. 09 5.34 5. 58 5. 92 10. 21 3. 67 0. 90 n. d. 3. 25 0. 29 0. 49 99. 25 Bl. II .797 .148 .033 .078 .148 .182 .059 .010 .041 .002 .007 62 43. 70 14. 98 5. 38 5.44 7. 45 9. 64 3.02 2. 38 5. 27 trace 2.15 0. 66 0. 06 100. 24 2.98 Al. I .728 .147 .034 .075 .186 .172 .048 . 025 .026 .005 .001 63 50. 22 16. 20 3.13 8.07 7. 54 8. 57 3. 36 1. 38 0. 22 1.95 trace 100. 64 2. 79 A2. II .837 .158 .020 .112 .189 .153 .054 . 015 .024 — 64 48.97 16.12 1.90 9.63 7. 64 8. 73 2. 99 1.21 1.39 1.62 trace 100. 20 •2.89 A2. II .816 .158 .012 .134 1.91 1.55 .048 .013 .020 — SALFEMANE—CAMPTONOSE. 325 ORDER 5. PERFELIC. GALL A RE—Continued. SUBRANG 4. DOSODIC. CAMPTONOSE—Continued. Inclusive. Norm. Locality. 1 O 3.5 di 27.4 Punta Luccia, or ah 12.3 29.9 mt hm 7. 7 2.9 Yulcano, ^Eolian Islands. an 13.6 ap 1.4 Q 1.4 di 30.4 Pikonkorpi, Kalvola, or ab 6 . 1 24.6 ny o. o mt 15.3 Finland. an 15.6 Q 2.3 di 23.0 Jalguba, Olonez, or ab 13.9 23.6 Wo 2.9 mt 11.8 Russia. an 19.2 Cl 0.10 or 6.7 di 10.5 Goroschki, A r olhvnia, s 0.26 ab an 23.6 20.6 hy 21.1 ol 6.3 Russia. mt 0.9 il /. / ap 1.4 Cl 0.10 or 13.9 di 6.8 Goroschki, A r olhynia, s 0.30 ab 23.1 an 18.9 hv ol 19.2 5. 4 Russia. mt 1.2 il 7.9 ap 2.6 Cr 2 0 3 0.26 or 11.1 di 27.7 Assab, Alassowa, ab an 14.7 21.7 ol mt 13.3 5.8 Abyssinia. ne 1.7 ap 1.4 Q or ab 1.9 5.0 24.6 di hy mt 25.3 10.4 9.5 Colesburg, Cape Colony. an 22.2 or 7.2 di 25.4 Kilauea, Hawaii. ab 25.2 hv 5.3 an 20.6 ol 9.2 mt 4.6 il 1.8 or 7.8 di 14.6 Kilauea, Hawaii. ab 33.5 hv 7. 7 an 18.1 oi 3.1 mt 13.2 ap 1.0 or 7.2 di 11.5 Kilauea, Hawaii. ab 25.2 hy 15.0 an 26.7 mt 10.2 il 0.8 S0 3 2.64 or 5.6 di 22.5 Kilauea, Hawaii. CuO 0.18 ab 30.1 ol 3.5 an 22.0 mt 7.7 ne 0.4 il 6.3 so 3 0.11 < r 13.9 di 17.7 Alas River, Timor CuO trace ab 14.7 an 20.6 ol mt 8.7 7.9 Island, Dutch East ne 5.7 il 4.0 Indies. ap 1.7 or 8.3 di 14.4 Cockburn Island, ab an 28.9 24.7 hy ol 4.4 12.1 Antarctic. mt 4. 6 il 3.7 or 7.2 di 13.3 Cockburn Island, ab an 25.2 27.0 hv ol 5.0 15.5 Antarctic. mt 2.8 il 3.1 Analyst. L. Ricciardi. A. AY. Forsberg. Loewinson- Lessing. AV. Tarassenko. AY. Tarassenko. L. Ricciardi. Gridmore and Halberstadt. 0. Silvestri. * 0. Silvestri. O. Silvestri. A. B. Lyons. O. Pufahl. G. T. Prior. G. T. Prior. Reference. Author’s name. G. Alercalli, Gior. Alin., Ill, p. 102, 1892. Basalt. J. J. Sederholm, Finl. G. Und., Bl. 18, p. 49,1890. L T ralite- porphyrite. Loewinson-Lessing, T. M. P.M.,VI, p. 294, 1885. A^ariolite- aphanite. AY. Tarassenko, cf. N. J., 1899,1, p. 463. Olivine-gabbro. A\ T . Tarassenko, cf. N. J., 1899,1, p. 463. Olivine- pyroxene- syenite. L. Ricciardi, B.S. G. It., V, p. 58, 1886. Basalt. E. Cohen, N. J. B. B., A', p. 233, 1887. Olivine- diabase. O. Silvestri, B. C. G. It., XIX, p. 141, 1888. Basalt. O. Silvestri, B. C. G. It., XIX, p. 175, 1888. Basalt. 0. Silvestri, B. C. G. It., XIX, p. 183, 1888. Basalt. A. B. Lvons, A. J. S., II, p. 424, 1896. Basalt (Pele’s hair). A. AVichmann, Gest. v. Timor, . Leiden, 1887, p. 128. Basalt. G. T. Prior, Min. Mag., XII, p. 89, 1899. Basalt glass. G. T. Prior, Min. Alag., XII, p. 89, 1899. Basalt. Remarks. “ Basalt” in T. M.P. M., XII, p.107,1891. Sum low, due to H 2 0+. “H 2 0+” in¬ crease. Sum low, due to H 2 0 + . “H 2 0+” in¬ crease. Sum high. Sp. gr. low. Near kentallenose. Sum low. Sum high. MnO high. MnO high. Ignited before analysis. S0 3 from fumarole action. 326 CHEMICAL ANALYSES OF IGNEOUS ROCKS. CLASS III. SALFEMANE—Continued. RANG 3. ALKALICALCIC. CAMPTONASE. No. Si0 2 Al-A FeA FeO MgO CaO Na 2 0 K 2 0 H,0 + H 2 0- co 2 Ti0 2 PA MnO BaO Sum Sp. gr. 1 42.25 16. 87 5.24 10. 72 6.91 3.33 3.96 0. 77 5.58 0. 43 none 2. 93 0. 34 0. 40 trace? 99.84 Al. I 7.04 1.65 .032 .149 .168 .059 .059 .008 .035 .002 .006 — 2 50. 76 12. 83 4. 98 10. 09 6. 67 9. 88 3.52 0.62 0. 87 100. 22 A3. Ill .846 .126 .031 .140 .167 .177 0.56 .006 3 51.08 15. 55 7.71 8. 55 4. 48 9. 00 3. 29 0.53 n. d. 0. 04 100. 23 A3. Ill .851 .151 .049 .319 .112 .160 .053 .006 — 4 51.07 14. 93 6.44 5. 98 4.84 7. 89 5.04 0.16 1. 73 0. 24 1. 65 0. 19 0. 22 100. 38 Al. I .851 .146 .040 .083 .121 .141 .081 .002 .021 .001 .003 5 51.01 11.89 1.57 6. 08 8.87 10. 36 4.17 0.15 2. 09 0. 24 0. 98 0.17 trace 99. 35 Bl. II .850 .117 .010 .085 .222 .185 .068 .002 .012 .001 — 6 51.58 14. 99 2.04 8.36 6. 51 8. 59 3. 08 0.31 2. 67 0. 34 1.05 0. 24 trace 99. 76 A2. II .860 .147 .013 .117 .163 .153 .050 .003 .013 .002 — 7 51. 28 15. 05 2.42 8. 01 6.07 7.08 4. 43 0.12 2. 96 0. 39 1.33 0.13 0. 25 99. 62 A2. II .855 ,ii.; .015 .ill .152 .127 .071 .001 .017 .001 .004 8 49.08 14. 68 1.95 9. 63 6.69 10. 09 4. 60 0. 20 1.18 0. 28 1.72 0. 23 0.15 100. 48 A2. II .818 .144 .012 .134 .167 .180 .074 .002 .021 .002 .002 9 46.11 15. 97 3.31 9.16 8.35 8.49 3.42 0. 63 1.99 0. 54 0. 47 0. 65 99. 09 (99.10) B2. Ill . 769 .156 .021 .127 .209 .151 .055 .006 .007 .003 . 009 10 52. 73 14. 35 4. 37 7. 60 5.13 7.26 3. 57 0.82 1.33 0.22 2.34 0. 46 trace trace 100.18 2.872 A2. II . .846 .141 .027 .106 .128 .129 .058 .009 .029 .003 — — 15° 11 51.82 11.66 4.39 5.46 7. 02 12. 65 3.38 0.32 1.25 1.01 0. 44 100. 72 3. 008 A2. II .864 .114 .027 .076 *175 .226 . 055 .003 .006 12 44. 64 13.97 5. 69 5. 75 9. 78 11. 50 2. 99 0. 43 4. 22 1.80 100. 77 A3. Ill .744 .137 .035 .080 .245 .205 .048 .004 .022 13 53. 52 13. 56 4.93 6.61 7. 37 7.39 3. 22 0. 68 1.03 1. 84 100. 05 A3. Ill .892 .133 .031 .092 .184 .132 .051 .007 .023 14 41.32 12.27 15.13 7.36 3. 56 10. 33 4. 19 0.85 4. 38 0. 20 0. 35 0. 97 100. 91 B2. Ill .689 .120 .094 .102 .089 .184 .068 .009 .004 ,007 15 47.98 12.52 8. 07 7.09 7.41 10. 56 3.58 0. 58 trace 1.95 0.33 100. 07 2. 75 A2. II .800 .123 .050 .099 .185 .188 .058 .006 — .014 .005 20° 16 47. 53 12. 35 8. 32 7.15 7.18 11.54 3. 60 none 0. 04 1.98 0. 28 99.97 3.11 A2.|II .792 .121 .052 .100 .180 .206 .058 — .014 .004 20° 17 47. 51 12. 53 8. 08 7.05 8. 40 10.05 3. 85 none 0. 03 2.05 0. 28 99. 83 3.02 A2. II .792 .123 .050 .098 .210 .179 .062 — — .015 .004 20° SALFEMANE-ORNOSE. 327 ORDER 5. PERFELIC. GALLARE— Continued. SUBRANG 5. RERSODIC. ORNOSE. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. ZrOo s Cr»0 3 V2O3 NiO SrO none trace 0.03 0.07 0.01 none or 4.4 ab 33.5 an 16.4 C 3.5 hy 2.6 oi 21.8 mt 7.4 il 5.4 Mars Hill, Aroostook County, Maine. W. F. Hille- brand. H. E. Gregorv, B. U. S. G. S., 165, p. 179, 1900. Diabase glass. or 3.3 ab 29.3 an 17.8 di 25.9 hy 8.5 ol 7.3 mt 7.2 Little John Island, Portland, Maine. E. C. E. Lord. E. C. E. Lord, A. G., XXII, p. 341, 1898. Diabase- porphyry. Q 3.7 or 3.3 ab 27.8 an 25.9 di 15.5 hy 12.8 nit 11.4 The Dalles, Columbia River, Oregon. H. W. Muth- raann. Iv. Oebbeke, N. J., 1885, I, p. 226. Basalt. S0 3 Cl F trace trace trace or 1.1 ab 42.4 an 17.5 di 17.7 hy 6.5 mt 9.3 il 3.2 Forbestown, Butte County, California. H. N. Stokes. IL W. Turner, 17A.R.U. S.G. 8., I, p. 731, 1896. Uralite-diorite. FeS 2 CuS' Cr 2 0 3 1.73 trace 0.04 or 1.1 ab 34.1 an 13.1 ne 0.9 di 30.7 ol 11.4 mt 2.3 il 1.8 pr 1.7 Grass Valley, Nevada County, California. H. N. Stokes. W. Lindgren, 17 A. R. U. S. G. S., II, p. 66, 1896. Diabase. Sum low. Q 2.5 or 1.7 ab 26.2 an 26.1 di 13.6 hy 21.7 nit 3.0 il 2.0 Mitchell Canyon, Mount Diablo, California. W. H. Mel¬ ville. W. H. Melville, B. G. S. A., II, p. 412, 1891. Diabase. Not fresh. NiO 0.10 or 0.6 ab 37.2 an 21.1 di 11.6 hy 17.4 ol 1.9 mt 3.5 il 2.0 Sulphur Bank, California. W. H. Mel¬ ville. G. F. Becker, M. U. S. G. S., XIII, p. 99, 1888. Pseudodiabase. or 1.1 ab 28.8 an 18.9 ■ne 5.4 di 25.5 ol 12.9 mt 2.8 il 3.2 Mount St. Helena, California. W. H. Mel¬ ville. G. F. Becker, M. U. S. G. S., XIII, p. 98, 1888. Pseudodiabase. or 3.3 ab 27.8 an 26.4 ne 0.6 di 10.6 ol 21.1 mt 4.1 il 1.1 ap 1.1 Orno, Sweden. R. Mauzelius. A. Cederstrom, G. F. F., XV, p. 108, 1893. Ornoite. Sum low. Cl F Cr,0 3 trace trace trace Q 4.3 or 5.0 ab 30.4 an 20.6 di 10.1 hy 14.6 nit 6.3 il 4.5 ap 1.1 Riidigheim, Hanau, Rh. Prussia. T. Petersen. T. Petersen, cf. N. J., 1894, I, p. 460. Basalt. S 0.32 Q 0.9 or 1.7 ab 28.8 an 15.6 di 37.8 hy 5.2 mt 6.3 il 0.9 Rauenthal, Taunus Mountains, Hesse-Nassau. L. Milch. L. Milch, Z. D. G. G., XLI, p. 430, 1889. Diabase. • or 2.2 ab 18.3 an 23.6 ne 3.7 di 26.4 ol 10.6 mt 8.1 il 3.4 Albacher Hof, Giessen, Ober Hesse. A. Streng." A. Streng, Ber. Oberh. Ges., XXIX, p. 99, 1893. Basalt. Q 6.9 or 3.9 ab 26.3 an 20.9 di 12.7 hy 17.3 mt 7.2 il 3.5 Londorf, Vogelsberg, Hesse. A. Streng. A. Streng, N. J., 1888, II, p. 217. Basalt-obsidian. Nearly in Order 4. or 5.0 ab 26.2 an 12.0 ne 5.1 di 21.3 wo 2.5 mt 21.8 ap 2.3 Gedern, Vogelsberg, Hesse. J. M. Ledroit. J. M. Ledroit, Ber.Oberh.Ges. XXIV, p. 152, 1886. Trachvdolerite. or 3.3 ab 30. 4 an 16.4 di 18.5 hy 12.1 oi 3.0 mt 11.6 ap 4.6 Pianeti, Rovereto, Ty¬ rol. P. Giacomelli. P. Giacomelli, Soc. Alp. Trident, XIX. p. 407, 1894. Basalt. Dried before analysis. H 2 0=1.56. ab 30.3 an 17.5 di 21.8 hy 12.4 ol 1.0 mt 12.1 ap 4.6 Pradaglia, Rovereto, Tyrol. P. Giacomelli. P. Giacomelli, Soc. Alp.Trident, XIX, p.409, 1894. Basalt. Dried before analysis. H 2 O=0.95. ab 32.5 an 17.0 di 15.1 hy 14.1 oi 4.4 mt 11.6 ap 4.9 Manzano, Rovereto, Tyrol. P. Giacomelli. f P. Giacomelli, Soc. Alp. Trident, XIX, p. 410, 1894. Basalt. Dried before analysis. H,0=2.35. 328 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS III. SALFEMANE—Continued. RANG 3. ALKALICALCIC. CAMPTOXASE—Continued. No. Si0 2 Al 2 O s FeA FeO MgO CaO Na 2 0 k 2 o h 2 o+ 1 o co 2 Ti0 2 PA MnO BaO Sum » Sp. gr. 18 46.18 13.45 8.18 7. 01 7.35 12. 26 3.05 0. 57 trace 1.56 0.31 99.92 3. 01 A2. II .770 .132 .051 .097 .184 .219 .049 .006 — .011 .004 20° 19 45. 76 13. 50 8. 43 6.96 7.38 12.19 3. 09 0. 55 1.72 0. 35 99.93 3. 05 A2II .763 .132 .052 .097 .185 .218 . .050 .006 .012 .005 20° 20 51.63 12.10 8. 67 3.10 9.40 9.17 3.10 0.30 2.47 0. 26 0-30 101.08 Bl. II .861 .119 .054 .043 .235 .163 ' .050 .003 .031 .002 .004 21 49. 88 13. 79 9.65 2.61 6.12 9. 59 3.30 0.17 3. 97 0. 26 0.67 100. 26 Al. I .831 .135 .060 .036 .153 .171 .053 .002 .050 .002 .010 RANG 4. DOCALCIC. AUVERGNASE. 1 46. 86 13. 96 5.23 4. 67 7. 69 9. 42 1.85 2. 02 3.43 1.29 2.19 1.13 0.15 trace 0. 03 99. 92 Al. I .781 .137 .032 . 065 .192 .168 .030 .021 .014 .001 — — 2 50. 03 14.08 2. 92 6.11 10. 73 7.46 1.46 2. 64 3. 70 0.61 0. 42 0. 08 0. 04 100.28 Al. I .834 .138 .018 .085 ,268 .133 .023 .027 .008 .003 .001 — 3 47.5 15.6 2.6 7.1 11.7 9.8 1.4 1.5 2.4 99.7 2.96 A3. Ill .792 .153 .016 .099 .293 .175 .022 .016 4 53. 63 14.17 1.46 8. 07 7. 05 8.52 1.80 2.03 2.01 0.93 trace 100.29 2. 789 B2. Ill .894 .139 .009 .112 .176 .151 .029 .021 .006. — 6° RANG 4. DOCALCIC. AUVERGNASE . 1 ! 47.20 1 18. 64 1.96 6. 82 8. 28 11.52 2. 91 0. 28 1.44 0. 84 99. 89 2. 02 A3. Ill .787 .182 .013 .094 .207 .205 .047 .003 .010 2 46.29 17.16 2. 57 9.87 7. 79 12. 04 2.21 0.16 0. 51 1.21 99.81 3. 06 A3. HI .772 .168 .016 .138 .195 .215 .035 .002 .015 ¥ 3 45. 66 16. 26 2. 97 8.51 10. 21 12. 25 1. 34 0. 31 0. 92 1.39 99. 82 3. 04 A3. Ill .761 .159 .019 .118 .255 . 219 .021 .003 .017 4 ' 44.79 15.18 4.13 8. 21 7.93 14.10 2.18 0. 30 1.33 1.84 99. 99 3. 04 A3. Ill . 747 .148 .025 .114 .198 .251 .035 .003 .023 5 49.63 14. 40 2.85 8. 06 7.25 9.28 2. 47 0. 70 1.47 0. 27 1.36 1.68 0. 25 0.17 trace? 100.17 Al. I .827 .141 .018 .112 .181 .166 .040 .008 .021 .002 .002 — 6 46. 59 17. 55 1.68 10. 46 7. 76 10. 64 3. 31 0. 72 0. 07 0.10 1.41 100. 29 3. 047 A3. Ill .777 .172 .011 .145 ..194 .190 .053 .008 .017 11° 7 52. 40 13. 55 2. 73 9. 79 5.53 10. 01 2. 32 0. 40 1.05 0. 62 1.08 0.12 0.26 trace? 99. 99 Al. I .873 .133 .017 .137 .138 .178 .037 .004 .014 .001 .004 — S ALFEM A N E-A U VE RG NOS E. 329 ORDER 5. PERFELIC. GALLARE—Continued. SUBRANG 5. PERSODIC. ORNOSE—Continued. Inclusive. Norm. or 3.3 di 23. G ab 25. 7 hv 2.6 an 21.4 oi 7.6 mt 11.8 ap 6 or 3.3 di 22.7 ab 26.2 hv 1.4 an 21.1 ol 8.7 mt 12.1 ap 4.0 SO ;) 0.07 Q 4.7 di 21.0 S 0.03 or 1.7 hy 13.8 Cr.,0 :! trace ab 26.2 mt 3.0 Cub 0.48 an 18.3 il 4.8 hm 6 .4 so 3 0.09 Q 6.6 di 16.9 s 0.02 or 1.1 hm 7.5 Cr.,0 :t trace ab 27.8 il 5.5 CuO 0.14 an 22.2 hn 9.7 Pf 1.9 Locality. Analyst. Reference. Author’s name. Remarks. Valle del Parol, Ro- vereto, Tyrol. P. Giacomelli. P. Giacomelli, Soc. Alp. Trident, XIX, p. 407, 1894. Basalt. Dried before analysis. H, 0-1.27. Tierno, Rovereto, Tyrol. P. Giacomelli. P. Giacomelli, Soc. Alp. Trident, XIX, p. 405, 1894. Basalt. Dried before analysis. HjO=1.34. Waianae, Oahu, Ha¬ waii. A. B. Lyons. A. B. Lyons, A. J.S., II, p. 424, 1896. Basalt. Sum high. Dried before analysis. H 2 0 f =0.33. H 2 0— =0.47. Koolan Range, Oahu, Hawaii. A. B. Lyons. A. B. Lyons, A. J. S., II, p. 424, 1896. Basalt. Dried before analysis. H 2 0 + =1.14. H 2 0 —=1.84. SUBRANG 2. SODIPOTASSIC. F trace Q 0.5 di 18.0 Meriden, Connecticut. H. N. Stokes. SrO trace or 11. 7 hy 13.3 Li.,0 trace ab 15.7 mt 7.4 an 23.9 il 2.2 Cr..Ofj trace or 15.0 di 10.2 South Boulder Creek, L. G. Eakins. NiO trace ab 12.1 an 24.5 hy ol 26.5 2.2 Montana. mt 4.2 il 1.2 ap 1.0 Cr 2 0 3 0.1 or 8.9 di 13.5 Ben Damhain, Loch J. H. Player. ab 11.5 an 32.0 hy ol 11.9 15.8 Garabal, Scotland. mt 3.7 SO, Cl 0.62 trace Q 5.6 or 11.7 di hv 10.0 27.3 Radicofani, Tuscany. L. Ricciardi. ab 15.2 mt 2.1 an 24. 7 ap 1.9 B. Iv. Emerson, B. G. S. A., VIII, p. 77, 1897. G. P. Merrill, Pr. U. S. Nat. Mus., XVII, p. 670, 1895. Dakyns and Teall, Q. J. G. S., XLVIII, p. 115, 1892. G. Mercalli, Att. Soe. Ital., Milano, XXX, p. 371, 1887. Diabase pitch- stone. Lamprophyre. Biotite-diorite. Andesite. Not fresh. Near kentallen- ose. Also in M. U. S. G. S., XXIX, p. 437, 1898. One decimal. SUBRANG 3. PRESODIC. AUVERGNOSE. or 1.7 di 16.6 ab 21.5 ol 15.9 an 36.7 mt 3.0 ne 1.7 il 1.5 or 1.1 di 19.5 • ab 18.3 hy 2.4 an 36.4 ol 15.8 mt 3.7 il 2.2 or 1.7 di 19.3 ab 11.0 hy 11.2 an 37.5 ol 11.2 mt 4.4 il 2.6 or 1.7 di 31.8 ab 12.6 ol 9.5 an 30.6 mt 5.8 ne 3.1 il 3.6 SO, none Q 1.5 di 16.6 Cl 0.07 or 4.4 hy 19.8 F trace ab 21.0 mt 4.2 FeS. 0.22 an 25.9 il 3.2 NiO' 0.04 or 4.4 di 18.3 ab 16.8 ol 18.8 an 30.9 mt 2.6 ne 6.0 il 2.6 Fe^ 0.13 Q 6.7 di 19.7 NiO trace or 2.2 hy 18.1 SrO none ab 19.4 mt 3.9 Li.,0 none an 25.6 il 2.2 Green Point, Monhe- gan Island, Maine. Monhegan Island, Maine. Monhegan Island, Maine. Seal Ledge, Monhe¬ gan Island, Maine. Mount Ascutney, Ver¬ mont. Salem Neck, Essex County, Massachu¬ setts. Pine Hill, South Brit¬ ain, Connecticut. E. C. E. Lord. E. C. E. Lord. E. C. E. Lord. E. C. E. Lord. W. F. Hille- brand. H. S. Washing¬ ton. W. F. Hille- brand. E. C. E. Lord, A. G., XXVI, p. 340, 1900. E. C. E. Lord, A. G., XXV, p. 346, 1900. E. C. E. Lord, A. G., XXVI, p. 346, 1900. E. C. E. Lord, A. G., XXVI, p. 340, 1900. R. A. Daly, B. U. S. G. S., 148, p. 70, 1897. H. S. Washington, J. G., VII, p. 285, 1899. W. H. Hobbs, B. U. S. G. S., 168, p. 35, 1900. Gabbro-diorite. Beerbachite. Malchite. H ornblende- gabbro. Diabase. Camptonite. Olivine-basalt. Sp. gr. 3.0 Near h 6 specime 6 specime 5 specimens. 330 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS III. SALFEMANE—Continued. RANG -1. DOCALCIC. AUVERGNASE—Continued. No. SiO., ! alo 3 Fe 2 0 3 FeO MgO CaO Na. 2 0 k 2 o H 2 0+ H 2 0- C0 2 Ti0 2 r-A MnO BaO Sum Sp. gr. 8 46. 85 , 18.00 6.16 8. 76 8.43 10.17 2.19 0.09 0. 30 100.95 3. 097 B3. IV .781 .176 .039 . 122 .211 .182 .035 .001 9 44.97 15.38 2. 29 12. 39 10. 89 7. 50 3.02 0. 56 0. 65 0.10 0. 23 1.18 0.14 0.22 trace? 99. 64 Al. I . 750 .150 .014 .172 .272 .134 .048 .006 .015 .001 .003 — 10 51. 36 16.25 2.14 8. 24 7. 97 10. 27 1.54 1.06 1.33 0. 09 100.28 A3. Ill .856 .159 .013 .114 .199 .184 .025 .011 .001 11 51. 68 15.87 1.46 8. 43 7.84 11.08 1.86 0. 34 0.15 0.16 0.72 0.12 0.15 99. 86 A2. II .861 . 155 .009 .117 .196 .198 .030 .003 .009 .001 .002 12 48.02 17. 50 1.80 7. 83 ,10. 21 13.16 1.48 trace 0. 79 100.79 B3. IV .800 .171 .011 .108 . 255 .235 .024 —- 13 46. 85 19. 72 3, 2 7.99 7. 75 13.10 1.56 0. 09 0. 56 100. 84 B3. IV .781 .193 .020 .111 .194 .234 .025 .001 14 46. 68 17.12 2.18 7.61 10. 34 13. 46 1.75 trace 0. 88 .trace trace 100.02 3. 069 A3. Ill .778 .168 0.14 .106 .259 .240 .028 — 15 51.31 13. 64 % 0. 52 8.49 12. 73 12. 41 1.40 0. 32 n. d. trace trace trace 100. 82 B3. IV .855 .134 .003 .118 .318 .221 .022 .003 — — — • 16 50. 88 13.17 1. 11 9. 66 13.05 10. 19 1.17 0.31 0.14 trace 99. 67 A3. Ill .SIS .129 .007 .135 .326 .182 .019 .003 _ 17 46.91 15.85 2. 86 9. 95 7.01 9. 62 2.65 0. 69 1.62 0. 24 2. 03 0. 26 0. 22 trace? 99. 98 Al. I .782 . 155 .018 .139 . 175 .171 .043 .007 .025 .002 .003 —- 18 47.90 15.60 3.69 8.41 8.11 9. 99 2. 05 0. 23 2. 34 0.15 0. 38 0. 82 0.13 ' 0.17 0. 05 100.12 Al. I .798 .153 .023 .117 .203 .178 .033 .002 .010 .001 .002 — 19 51.46 14.35 3. 90 5.28 9. 54 9. 08 2. 92 0. 24 I 3.30 i 0. 20 100.27 A3. Ill .858 .140 .024 .074 .239 .161 .047 , . 003 20 48. 23 18. 26 1.26 6.10 10. 84 9. 39 1.34 0. 73 2. 00 0.26 0. 43 1.00 0.07 99.91 A2. II .804 .179 .008 .085 .271 .168 .021 .007 .012 .001 21 44.29 17. 46 3. 82 10. 35 7. 03 8. 68 2.19 0. 71 J 4.11 | 0. 21 1.40 0. 20 trace none 100. 45 A2. II .738 | .171 .024 .144 .176 .155 .035 .008 .017 .001 1 — — 22 48. 35 15. 40 4.04 4. 63 11.61 10. 38 1.87 0. 35 3.60 0. 08 100. 31 A3. Ill .806 .151 .025 .064 .290 .185 .030 .004 23 47.96 16. 85 4.33 4.17 9.15 13.25 1.25 0.30 2. 89 0. 08 100. 23 A3. Ill .799 . 165 .027 .058 .229 .236 .020 ; .003 - 24 49.65 16.36 4. 39 7.19 8. 00 9.18 2.49 1.17 2. 39 • 100.82 B3. IV .828 .160 .027 .100 .200 .164 .040 .013 25 40. 07 17.21 i 0.46 12.18 3.60 9. 66 2.96 trace 1.55 2. 70 trace 99.89 A3. Ill .818 .169 .003 .170 .090 .172 .048 — — SALFEMANE-AUVERGNOSE. 331 ORDER 5. PERFELIC. GALL ARE—Continued. SUBRANG 3. PRESODIC. AUVERGNOSE—Continued. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. or 0.6 ab 18.3 an 38.9 di 9.5 hv 16.6 ol 7.8 mt 9.0 Wilmurt Lake, Ham¬ ilton County, New York. C. H. Smyth, jr. C. H. Smyth, jr., A. J. S., XLVIII, p. 61, 1894. Gabbro. Sum high. s Cr 2 03 v s 0 3 NiO SrO LloO 0.06 trace 0.02 0.02 trace trace or 3.3 ab 21.0 an 26. 7 ne 2.3 di 8.7 ol 30.6 mt 3.2 il 2.3 Elizabethtown, Essex County, New York. W. F. Hille- brand. J. F. Kemp, B. U. S. G. S., 168, p. 37, 1900. Diabasic norite. NiO 0.03 Q 2.0 or 6.1 ab 13.1 an 34.2 di 13.9 hy 26.5 mt 2.0 Watchung Mountain, Orange, NewJersey. L. G. Eakins. J. P. Iddings, B. U. S. G. S., 150, p. 255, 1898. Basalt. Q 2.9 or 1.7 ab 15.7 an 33.9 di 17.2 hy 24.3 mt 2.1 il 1.4 Rocky Ridge, Mary¬ land. E. A. Schneider. J. S. Diller, B. U. S. G. S., 148, p. 90, 1897. Diabase. Not.described. ab 12.6 an 40.9 di 20.0 hv 12.0 ol 11.9 mt 2.6 Baltimore area, Maryland. L. McCay. G. H. Williams, B. U. S. G. S., 28,' p. 39, 1886. Gabbro-diorite. 19 specimens. or 0.6 ab 13.1 an 43.9 di 17.3 hy 11.4 ol 8.4 mt 4.6 Baltimore area, Maryland. L. McCay. G. H. Williams, B. U. S. G. S., 28, p. 39, 1886. Gabbro. 23 specimens. ab 14. 7 an 38.9 di 22.6 hv 0.9 ol 18.9 mt 3.2 Windsor road, Balti¬ more, Maryland. L. McCay G. H. Williams, B. U. S. G. S., 28, . p. 37, 1886. Gabbro-diorite. or 1.7 ab 11.5 an 30. 3 di 25.1 hv 22.3 of 9.0 mt 0.7 The Twins, Culpeper County, Virginia. W. G. Brown. Campbell & Brown, B. G. S. A., II, p. 346, 1891. Hypersthene- di abase. Sum high. or 1.7 ab 10.0 an 29. 7 di 16.9 hv 35.4 Ol 4.3 mt 1.6 The Twins, Culpeper County, Virginia. W. G. Brown. Campbell & Brown, B. G. S. A., II, p. 346, 1891. Olivine- hypersthene- diabase. . ZrO, S Cr„0 3 VaO, NiO SrO none none 0.01 0.03 0.03 trace ? or 3.9 ab 22.5 an 29.2 di 15.1 hy 8.1 ol 10.7 mt 4.2 il 3.8 Hump Mountain, Mitchell County, North Carolina. W. F. Hille- brand. A. Keith, P>. U. S. G. S., 168, p. 52, 1900. Diorite. Cr 0 0 3 ■ NiO trace 0.10 Q 0.3 or 1.1 ab 17.3 an 32.8 di 13.5 hy 24.8 mt 5.3 il 1.5 Sec. 13, T. 47 N., R.46 W., Penokee-Gego- bicReg., Michigan. T. M. Chatard. C. R. Van Hise, M. U. S. G. S., XIX, p. 357, 1892. Diabase. Q 1.0 or 1.7 ab 24.6 an 25. 3 di 15.7 hy 22.8 mt 5.6 Sturgeon Falls, Menominee Valley, Michigan. R. B. Riggs. G. H. Williams, B. U. S. G. S., 62, p. 76, 1890. Gabbro. Dried at 105°. Altered. or 3.9 ab 11.0 an 42.0 di 3.9 hy 29.9 ol 2.9 mt 1.9 il 1.8 Crystal Falls, Michi¬ gan. G. Steiger. J. M. Clements, J. G., VI, p. 382, 1898. Corrected. Bronzite- norite. Also in M. U. S. G.S.,XXXVI, p. 245, 1899. or 4.4 ab 18.3 an 35. 6 di 6.1 hy 10.0 ol 13.3 mt 5.6 il 2.6 Mansfield, Crystal Falls District, Michigan. G. Steiger. C. R. Van Hise, B. U. S. G. S., 168, p. 68, 1900. Metadolerite. Not fresh. or 2.2 ab 15.7 an 32.5 di 15.0 hv 21.1 ol 4.3 mt 5.8 Upper Quinnesec Falls, Menominee River, Wisconsin. R. B. Riggs. G. H. Williams, B. U. S. G. S., 62, p. 104, 1890. Greenstone. (Diabase.) Not fresh. Dried at 105°. Q 1.4 or 1.7 ab 10.5 an 39.5 di 21.1 hy 16.9 mt 6.2 Lower Quinnesec Falls, Menominee River, Wisconsin. R. B. Riggs. G. H. Williams, B. U. S. G. S., 62, p. 89, 1890. Gabbro- diorite. Dried at 105°. or 7.2 ab 21.0 an 29.7 di 12.8 hy 16.1 ol 5.3 mt 6.3 Frogrock Lake, Minnesota. Dodge and Si- dener. M. E. Wadsworth, B. G. Nh. S. Minn., p. 126, 1887. Porphyrite. ab 25.2 an 33.6 di 12.2 hy 19.7 ol 3.6 mt 0.7 Bashitanaqueb Lake, Cook County, Min¬ nesota. A. D. Meeds. N. H. Winchell, 21 A. R. G. Nh. S. Minn., p. 151, 1893. Gabbro. 332 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS III. SALFEMANE—Continued. RANG 4. DOCALCIC. AUVERGNASE—Continued. No. Si0 2 A1A Fe 2 0 3 FeO MgO CaO Na 2 0 K 2 0 H 2 0+ H,0- C0 2 Ti0 2 PA MnO BaO Sum Sp. gr. 26 49. 56 17.81 2. 76 9.48 5. 93 9. 70 2.87 none 0. 50 0.48 0. 57 0. 06 99. 82 2. 967 A2. II .826 . 175 .017 .133 .148 .173 .047 — .006 .004 . 001 27 45. 66 16. 44 0. 66 13. 90 11.57 7.23 2.13 0.41 0. 83 0.07 0.92 0.05 trace 100.03 Al. I .761 .161 .004 .193 .289 .129 .034 .004 .011 — — 28 43. 50 18. 06 7.52 7.64 3. 47 13. 39 2.00 1.30 1.22 2.10 100. 20 A3. Ill . 725 .177 .047 .106 .087 .239 .032 .014 .026 29 42. 03 13. 60 7.55 6. 65 6. 41 14.15 1.83 0.97 1.08 3. 70 0.57 99. 23 A2. II .701 .133 .048 .093 .160 .252 .030 .010 .046 .004 30 45. 71 10. 80 4. 43 9. 35 13. 75 10. 48 1.58 0. 85 0.97 1.83 0.11 0.17 trace 100.13 A2. II .762 .106 .028 .130 .344 .187 .025 .009 . 023 .001 .002 — 31 47.17 17. 85 7.42 1.18 6. 54 10. 12 2. 94 0.56 0. 65 2.13 0. 20 none 100.55 A2. II .786 .175 .046 .015 . 166 .180 .047 .006 .027 .001 . — 32 47. 54 16. 73 6. 69 6. 67 6. 38 8- 74 2.81 1. 10 0. 36 2. 76 0.51 0.19 0. 03 100.51 A2. II .792 .164 • .042 .093 .160 .156 .045 .012 .034 .004 .003 — 33 51.32 15. 28 0. 47 8.59 7. 25 11. 58 2. 92 0. 22 0. 95 0. 06 1.23 0. 25 0.16 none 100. 28 A2. II . 855 .150 .003 .120 .181 .207 .047 .002 .015 .002 .002 — 34 50. 89 16. 76 3.86 4. 69 8. 49 11. 72 2.61 0. 32 0.41 0. 79 0. 09 0. 13 trace 100.76 A2. II .848 .164 .024 .065 .212 .209 .042 .003 .010 .001 .002 — 35 47.93 18.51 . 2 ' 07 7. 25 9. 03 11.14 2.28 0. 24 0. 76 none 0. 73 0.11 0. 20 100.25 A2. 11 .799 .181 .013 .101 .226 .199 .037 .003 — .009 .001 .003 • 36 44. 77 17. 82 5. 05 6. 95 8. 22 10. 36 2.13 0. 92 2. 64 0.53 0. 72 trace 100.11 A2. II . 746 .175 .032 .097 .206 .185 .034 .010 .007 .005 — 37 48. 26 14. 83 3.27 5. 97 8. 77 11.38 1.57 1.13 3. 37 0.10 1.24 0.51 0. 25 0.15 0. 05 100.85 Al. I .804 . 145 .020 .083 .219 .203 .026 .011 .006 .002 .002 — 38 52. 06 14. 34 2.11 7. 74 9. 26 8.05 1.74 0. 73 2.90 0.59 . 0. 47 0.13 trace 100.12 A. II .868 .140 .013 .107 .232 .144 .028 .008 .006 .001 — 39 49. 36 16.35 2. 93 8. 55 7. 06 10. 08 2. 67 0. 82 0. 65 0. 22 0.98 0.30 0. 19 0.04 100. 25 Al. I .823 .160 .018 .119 .177 .180 .043 .009 .012 .002 .003 — 40 52.18 15.44 4. 26 5.10 8.89 8. 57 2.11 0. 55 2.16 trace trt c * 99. 26 2. 848 B3. IV .870 .151 .027 .071 . 222 .153 .034 .006 — — 41 52. 78 13. 66 2. 40 8. 64 7. 95 9.52 2. 34 0. 20 1.89 none 0.23 none 0.11 99. 72 A2. II .880 .134 .015 .120 .199 .169 .037 .002 .003 — .002 42 52.16 14. 72 4. 11 7.18 9. 44 8. 44 1.49 0. 32 1.06 none 0. 42 0. 06 0.48 100.17 A2. II .869 .144 .026 .100 .236 .150 .024 .003 .005 _ .007 SALFEMANE-AUVERGNOSE. 333 ORDER 5. PERFELIC. GALEA RE—Continued. SUBRANG 3. PRESODIC. AUVERGNOSE—Continued. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. ab 24.6 an 35.6 di 6.4 by 26.1 mt 3.9 il 0.9 ap 1.7. Sec. 26, T. 64 N.,R. 8 W., Minnesota. W JL Melville. W. S. Bavley, J. G., Ill, p. 10, 1895. Gabbro. Cr«0 3 NiO trace 0.16 or 2.2 ab 17.8 an 34.2 di 1.4 hy 10.1 ol 30.3 mt 0.9 il 2.6 Birch Lake, Minnesota. H. N. Stokes. W. S. Bayley, J. G , I, p. 712, 1893. Olivine-gabbro. or 7.8 ab 12.1 an 37. 0 ne 2.6 di 24.1 ol 1.1 mt 10.9 il 4.0 Magnet Cove, Arkansas. W. A. Noyes. J. F. Williams, A.R. Ark. G.S., 1890, • II, p. 295, 1891. Amphibole- monchiquite. so 3 NaCl FeS 2 0.08 0.03 0.56 or 5.6 ab 12.6 an 25.9 ne 1.7 di 31.8 ol 0.9 mt 11.1 il 7.0 ap 1.2 Fourche Mountain, Little Rock, Arkansas. Noyes and Brackett. J. F. Williams, A.R. Ark. G.S., 1890, 11, p. 108, 1891. . Fourchite. Sum low. or 5.0 ab 13.1 an 20.0 di 26.2 hy 6.3 ol 18.3 mt 6.5 il 3.5 Conical Peak, Crazy Mountains, Montana. L. G. Eakins. J. P. Iddings, B. U. S. G. S., 148, p. 146, 1897. Hornblende- picrite. Nearly in do- femane. S0 3 Li.,0 Fe’ 0.51 0.02 3.26 or 3.3 ab 24.6 an 33.9 di 10.4 hy 11.8 il 2.3 hm 7.4 tn 2.0 ir 3.3 Prospect Peak, Yellowstone National Park. J. E. Whitfield. J. P. Iddings, B. U. S. G. S. 148, p. 135, 1897. Basalt. Iron from mor¬ tar? Near No. 16, hessose. Q 1.3 or 6.7 ab 23. 6 an 29.7 di 8.2 hy 14.3 mt 9.7 il 5.2 ap 1.2 Near Grant’s Moun¬ tain,Taylor Region, New Mexico. T. M. Chatard. J. S. Diller, B. U. S. G. S., 148, p. 185, 1897. Basalt. SrO LioO trace trace or 1.1 ab 24.6 an 28.1 di 23.9 hy 13.3 ol 4.9 mt 0.7 il 2.3 Hornitos, Mariposa County, California. W. F. Hille- brand. , H. W. Turner, J. G., Ill, p. 403, 1895. Diabase. Also in 17 A. R. U. S. G. S., I, p. 694, 1896. Q 0.4 or 1.7 ab 22.0 an 33.1 di 20.0 hy 15.9 mt 5.6 il 1.5 Inskip Crater, Lassen Peak, California. Hillebrandand Chatard. J. S. Diller, B. U. S. G. S., 148, p. 200, 1897. Basalt. Dried at 110°. or 1.7 ab 19.4 an 39.2 di 13.2 hy 8.3 ol 13.2 mt 3.0 il 1.4 Paine’s Creek, Lassen Peak, California. T. M. Chatard. J. S. Diller, B. U. S. G. S., 148, p. 200, 1897. Basalt. or 5.6 ab 17.8 an 36.4 di 8.8 hy 6.8 ol 12.7 mt 7.4 il 1.1 ap 1.6 Kosk Creek, Shasta County, California. L. G. Eakins. J. S. Diller, A. G., XIX, p. 255, 1897. Hornblende- basalt. - • SrO LioO trace trace or 6.1 ab 13.6 an 30.0 di 21.2 hv 18.2 ol 0 .7 mt 4.6 il 0.9 Brow'n’s Valley, Yuba County, California. W. F. Hille- brand. W. Lindgren, B. U. S. G. S., 148, p. 228, 1897. Diabase- porphyrite. Not fresh. Q 5.0 or 4.4 ab 14. 7 an 28.9 di 9.1 hy 30.5 mt 3.0 il 1.1 Mitchell Canyon, Mount Diablo, California. W. H. Melville. W. H. Melville, B. G. S. A., II, p. 412, 1891. Diabase. NiO SrO LioO 0.05 none none or 5.0 ab 22.5 an 30.0 di 16.3 hy 12.1 ol 6.9 mt 4.2 il 1.8 Santa Maria Basin, Arizona. W. F. Hille- brand. J. P. Iddings, B. U. S. G. S., 148, p. 187, 1897. Mica-basalt. Not described. Q 6.0 or 3.3 ab 17.8 an 30.9 di 9.4 hy 23.5 mt 6.4 Cerro San Miguel, Puebla, Mexico. A. Rohrig. A. Hoppe, in Felix and Lenk, Btr. G. Mex., II, p. 213, 1899. Hypersthene- basalt. Sum low. S none Q 4.7 or 1.1 ab 19.4 an 26.4 di 16.8 hy 25.7 mt 3.5 Urinambo, Barama River, British Guiana. J. B. Harrison. J. B. Harrison, Rep. G. N. W. Dist., II, p. 11, 1898. Epidiorite Dried at 110°. FeS., 0.29 Q 8.0 or 1.7 ab 12.6 an 32.5 di 7.5 hy 28.2 mt 6.0 il 0.8 Upper Barama River, British Guiana. J. B. Harrison. J. B. Harrison, Rep. G. N. W. Dist., II, p. 9, 1898. Diorite Dried at 110°. 334 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS III. SALFEMANE—Continued. RANG 4. DOCALCIC. AUVERGNASE—Continued. No. SiO, A1A Fe 2 O a FeO MgO CaO Na/> k 2 o h 2 o+ H 2 0— C0 2 Ti0 2 P-A MnO BaO Sum Sp. gr. 43 49.46 16. 77 1.98 6. 57 9. 33 11. 17 1.55 0. 04 2. 02 0. 27 0. 79 none trace 99. 95 A2. II .824 .164 .013 .092 .233 .200 .025 — .010 — — 44 47. 28 13. 24 4.44 10. 50 5. 94 11.04 2. 62 0.31 2. 00 1.48 0.40 99.25 B2. Ill . 788 .130 .027 .146 .149 .197 .042 .003 .018 .006 45 45. 96 12. 68 7. 63 7.94 8.25 8. 36 1.88 0. 98 4.10 2. 43 0. 61 100.78 2. 96 A3. Ill .766 .124 .048 .110 .206 .149 .030 .010 .009 46 47.29 16. 93 1.58 2. 67 21.01 8. 56 1. 17 0.39 0. 29 99. 89 • A3. Ill . 788 .166 .010 .038 .525 .152 .019 .004 47 44.90 17. 25 1.71 4. 30 20.41 10. 89 1.22 0. 56 0.33 101.57 C3. V . 747 .169 .011 .060 .510 . 194 .019 .006 ; 48 42. 68 18. 36 5.27 7.02 12. 89 10.05 1.69 0.51 1.25 99. 80 A3. Ill .711 .180 .033 .097 .322 .179 .027 .005 49 47.00 15. 20 5.69 6.59 8. 76 12. 60 1.45 0. 66 0. 30 2.30 trace 0.26 100. 81 B2. Ill .783 .149 .035 .092 .219 .225 .023 .007 .029 — .004 50 50. 05 16. 80 0. 84 11.06 10.97 6. 46 1.75 1.13 0.10 0. 54 99. 70 A3. Ill .834 .165 .005 .154 .274 .115 .028 .012 .008 51 46. 52 16.11 11. 76 6. 31 5.45 9. 79 2. 20 1.83 100.38 A3. Ill . 775 .158 .067 .088 .136 .175 .035 .020 52 47. 72 18. 49 0. 68 4. 54 12.88 11.59 2. 81 0.41 1.30 none 0. 24 0. 04 trace j 100. 76 2.916 A2. II .795 .181 .004 .063 .322 .207 .045 .004 .003 — — 14° 53 47. 57 17. 52 0. 80 8. 22 10. 77 9. 53 1.69 1.10 2. 66 99. 86 2. 88 A3. Ill .793 .172 .005 .114 .269 .169 .027 .011 54 49. 31 16. 93 4. 02 5.90 9. 36 9. 57 2.41 0.47 2. 35 100.32 A3. Ill .822 .166 .025 .082 .234 .171 .039 .005 55 48. 87 16. 24 5.30 5.21 7. 65 8.92 3. 03 0.96 2. 20 0. 82 0. 31 99.51 A2. II .815 .159 .033 .072 .191 .159 .048 .010 .010 .002 56 B3. IV 48. 90 . 815 18. 08 .177 2. 52 .016 3. 20 .044 11.43 .286 14.10 .251 1.53 .024 0.25 .003 0. 88 trace 100. 89 57 48. 65 15.95 2. 49 6. 32 11.53 11.66 1.96 none 1.67 100. 23 A3. Ill .811 .156 .015 .088 .288 .208 .032 — 58 46.15 13. 57 3. 61 8.15 12. 63 15.15 1.29 trace n. d. 100.55 A3. Ill .769 .133 .022 .113 .316 .271 .021 — 59 45. 45 17. 40 4.43 7. 34 li. 06 11.95 1. 76 trace 0. 36 99. 75 A3. Ill . 758 .170 .027 .102 .279 .213 .028 — 60 43. 75 18. 02 7.50 5.31 10. 68 12. 40 1.46 0. 51 1.21 100. 84 B3. IV .729 .176 .047 .074 . 267 . 221 .023 .005 61 46. 16 13. 86 5. 26 1.81 11.60 15. 74 1.05 0. 30 3.40 trace 99.18 3. 00 B3. IV .769 .136 .033 .025 .290 .281 .017 003 — 15° SALFEMANE-AUYERGNOSE. 335 ORDER 5. PERFELIC. GALLARE—Continued. SUBRANG 3. PRESODIC. AUVERGNOSE—Continued. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. s NiO CoO none trace trace Q 2.0 ab 13.1 an 3S. 6 di hy mt il 13.6 26.0 3.0 1.5 Barima District, British Guiana. J. B. Harrison. J. B. Harrison, Rep.G. N.W. Di-t., II, p. 6, 1898. Diabase. or 1.7 ab 22.0 an 23.6 di o? mt il 25.5 12.6 2.3 6 .3 2.8 Cape Flora, Franz Josef Land. J. J. H. Teall.? J. J. H. Teall, Q. J. G. S., LIV, p. 647, 1898. Basalt. Q 1.5 or 5.6 ab 15.7 an 23.4 di hy mt 14.9 21.5 11.1 Binniaro Firth, Orkney Islands. J. S. Flett. J. S. Flett, Tr. R. Soc. Edinb., XXXIX, p. 887,1900. Camptonite. or 2.2 ab 10.0 an 39.8 di hy ol mt 2.0 15.1 28.3 2.3 Etang cle Lherz, Pyrenees, France. A. Pisani. A. Lacroix, C. R. VIII, Cong. < i. lilt., p. 833, 1901. Ariegite. or 3.3 ab 3.1 an 40.0 ne 3.7 di ol mt 11.0 37.4 2.6 Tuc d’Ess, Pyrenees, France. A. Pisani. A. Lacroix, C. R. VIII, Co ig. G. Int., p. 833, KOI. Ariegite. or 2.8 ab 12.1 an 41.1 ne 1.1 di ol mt 6.9 26. S 7.7 Escourget, Pyrenees, France. A. Pisani. \ A. Lacroix, C. R. VIII, Cong. G. Int., p. 833, 1901. Ariegite. Q 0.7 or 3.9 ab 12.1 an 33.1 di hy mt il 23.9 14.2 8.1 4.5 Solvsberget, Gran, Norway. G. Sarnstrom. W. C. Brogger, Q. J. G. S., L, p. 19, 1894. Essexite. or 6.7 ab 14.7 an 32.0 C 1.0 hy of mt 33.7 9.8 1.2 Elestad, West Blekinge, Sweden. H. Santesson. J. C. Moberg, Afh. Sv. G., Und., No. 158, p. 27, 1896. Diabase. Q 0.6 or 11.1 ab 18.3 an 28.6 di 15.9 hy 8.9 mt 15.5 Ivantua, Eura, Finland. Not stated. H. Gylling, Finl.G., Und., Bl. 12, p. 55, 1888. Diabase. Cl SrO Li 2 0 trace trace trace or 2.2 ab 14.7 an 36.7 ne 4.8 di ol mt 16.7 22.9 0.9 Hohenberg, n. Buhne, W estphalia. P. Jannasch. F. Rinne, Sb. Berl. Ak., 1891, p. 980. Olivine-gabbro. or 6.1 ab 14.1 an 37.3 di hy ol mt 7.9 12.1 IS. 5 1.2 Reiffenberg, Schorbach, Hesse. H. W T olff. II. Wolff, cf. N. J., 1891, II, p. 279. Nephelite- basanite. or 2.8 ab 20.4 an 33.9 di hy ol mt 11.0 20.0 4.3 5.8 St. Sigismund, Tyrol. Not stated. H. v. Foullon, Jb. G. R-A. Wien, XXXVI, p. 771, 1886. Porphyrite. t or 5.6 ab 25.2 an 28.1 di hy ol mt il 12.9 14.2 2.0 7. 7 1.5 Fitz am Berg, Salzkammergut, Tyrol. C. v. John. C. v. John, Jb. G. R-A. Wien, XLIX, p. 254, 1899. Diabase. s trace or 1.7 ab 12.6 an 41.7 di hy ol mt 22.1 9.1 9.0 3.7 Mount Collon, Arolla, Switzerland. A. Brunet. A. Brun, cf. N. J. 1897, I, p. 475. Gabbro. NiO trace ab 16.8 an 34.5 di hy ol mt 18.7 13.7 11.2 3.5 Gaggio Montano, Bologna, Italy. P. E. V. de Regny. P. E. V. de Regnv, cf. N. J., 1900, II, p. 397. Gabbro. ab 7.9 an 31.1 ne 1.7 di ol mt 36.3 18.3 5.1 Deneschkin Kamen, Ural Mountains, Russia. Krekmeyerom and Kulta- cheff. Loewinson-Lessing, G. Sk. Jushno-Saos., Dorpat, 1900, p. 166. Hvpersthene- gabbro. ab 14. 7 an 39.5 di hy ol mt 16.0 4.3 18.6 6.3 Supreya, Ural Mountains, Russia. Kultacheff. Loewinson-Lessing, G. Sk. Jus-hno-Saos., Dorpat, 1900, p. 167. Pyroxene- granulite (gabbro). or 2.8 ab 10.5 an 41.1 di hy ol mt 16.6 5.3 11.7 10.9 Between Solwa and Supreya, Ural Mountains, Russia. Kultacheff. Loewinson-Lessing, G. Sk. Jushno-Saos, Dorpat, 1900, p. 166. Microdiorite. or 1.7 ab 8.9 an 32.2 di hy ol mt 35.7 4.9 5.3 7.1 Villia, n. Laurion, Greece. R. Lepsius. R. Lepsius, G. v. Attika, Berlin, 1893, p. 98. Gabbro. Remarks. Dried at 110°. “Altered.” Sum low. Not fresh. Near kedabek- ase. Sum high. Near kedabekase. Incomplete i n Z. K., XVI, p. 27, 1890. Cof norm isTi0 2 and P 2 0 5 . “Ap¬ atite abun¬ dant.” Inclusion in ba¬ salt. Alkalies? Sum low. Npt fresh. 336 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS III. SALFEMANE—Continued. RANG 4. DOCALCIC. AUVERGNASE—Continued. No. Si0 2 A1 2 0 3 Fe 2 O s FeO MgO CaO Na 2 0 K 2 G h 2 o+ h 2 o- co 2 Ti0 2 PA MnO BaO Sum Sp. gr. 62 45. 30 13. 40 7.25 6. 26 11.53 10.34 2.17 0. 23 0.18 2. 50 0. 39 0. 34 99. 89 A2. II .755 .131 .045 . 087 .288 .184 .037 .002 .031 .003 .005 63 44. 06 15.10 5. 23 7.93 9. 84 12. 56 2.20 0.93 0. 30 1.80 0.53 0. 36 100. 84 A2. II .734 .148 .032 .110 .245 .224 .035 .010 .023 .004 . 005 64 02. IV 42. 72 .712 16. 46 .161 5. 74 .035 5.53 .076 6. 27 .157 11.20 .200 2. 94 .047 0. 66 .007 3. 23 3.10 .039 0.91 .006 0. 26 .004 101.02 (99.02) 65 42. 08 16. 04 5. 93 8. 75 6. 95 12. 66 1.88 0.93 2. 76 2.26 0. 34 0. 32 100. 90 B2. Ill .701 . 157 .037 .122 .174 .226 .030 .010 .028 .002 .005 66 51. 75 14. 67 6. 27 4. 73 5.19 11.94 2. 70 0. 58 1.86 99.69 A3. Ill .863 .144 .039 .065 .130 .213 .043 .006 • 67 50.17 15. 83 9.32 4. 87 7. 21 9. 34 3. 00 0. 71 0. 74 101.19 B3. IV .836 . 155 .058 .068 .180 .167 .048 .008 • 68 49. 50 14. 89 5.93 6. 42 6. 73 12. 45 1.68 0. 56 2. 84 101. 00 B3. IV .825 .146 .037 .089 .168 .222 .027 .006 69 50. 76 14. 75 2. 89 9. 85 6.54 11.05 2. 70 0. 88 n. d. 0. 26 0. 41 100. 09 • A3. Ill .846 .145 .018 .138 .164 .197 .043 .009 .002 .006 70 49. 20 14.90 4.51 12. 75 3. 90 9. 20 1.96 0. 95 0.10 1. 72 0. 42 0. 28 99. 89 A2. II .820 .146 .028 .177 .098 .164 .032 .010 .022 .003 .004 71 48. 82 15. 22 5. 72 9.65 4. 55 10. 40 2.10 0. 90 none 1. 16 trace 0. 67 99.19 3.01 B2. Ill .814 .149 .035 .135 .114 .185 .034 .010 .014 .010 RANG 5. PERCALCIC. KEDABEKASE. 1 48.02 20.01 . 1. 13 7.29 10. 05 11.42 0. 51 0. 05 0.57 0.10 0. 25 0. 23 trace 0. 18 none 99. 98 Al. I .800 .196 .007 .101 .251 .203 • .008 .001 .003 — .003 — 2 46. 85 20. 02 2.30 4. 60 10.16 13.84 1.32 trace 0. 88 0. 30 trace trace 100. 27 2. 996 A3. Ill .781 .196 .014 .064 .254 .247 .021 — .004 — — 3 44. 76 18. 82 2.. 19 4. 73 11.32 14. 58 0. 89 0.11 2.36 0.17 0.13 none 0. 15 100.29 Al. I . 746 .184 .014 . 065 .283 .260 .014 .001 $ .002 —' .002 4 47.49 15.81 1.07 4. 50 10. 39 15. 53 1.16 trace 1.83 1.20 trace 0.41 99. 45 A3. Ill .792 . 155 .007 .062 .260 .277 .019 — — .006 5 50. 76 16. 83 4.16 4.45 10. 09 11.30 0.97 0. 06 0.14 none 0. 46 none 0. 69 99.91 A2. II .846 .165 .026 .062 .252 .201 .016 .001 .006 — .010 6 47. 09 16. 99 1.62 3.60 19. 92 9. 20 0. 50 0. 25 0. 83 100. 00 A3. Ill .785 .167 .010 .050 .498 .164 .008 .003 7 44. 38 17.60 1.42 3.91 15.14 16. 03 0. 78 0.15 0. 59 100. 00 A3. Ill .740 .172 .009 .054 .379 .286 .013 .002 SALFEMANE—KEDEBAKASE. 337 ORDER 5. PERFELIC. GALLARE—Continued. SUBRANG 3. PRESODIC. AUVERGNOSE—Continued. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. or 1.1 ab 19.4 an 25.6 di 18.1 hv 12.8 Ol 6.3 mt 10.4 il 4.8 ap 1.0 Punta Delgada, San Miguel, Azores. C. v. John. C. v. John, Jb. G. R-A. Wien, XLVI, p. 291, 1896. Basalt. or 5.6 ab 13.1 an 28.6 ne 2.8 di 21.7 ol 15.6 mt 7.4 il 3.5 ap 1.3 Punta Delgada, San Miguel, Azores. C. v. John. C. v. John, Jb. G. R-A. Wien, XLVI, p. 291, 1896. Basalt. or 3.9 ab 23.1 an 29.7 ne 0.9 di 15.7 ol 6.1 mt 8.1 il 6.0 ap 2.0 Mindello, San Vicente, Cape Verde Islands. C. v. John. C. v. John, Jb. G. R-A. Wien, XLVI, p. 286, 1896. Limburgite. Sum uncertain. or 5.6 ab 8.9 an 32.5 ne 3.7 di 24.6 ol 9.5 mt 8.6 il 4.3 Mindello, San Vicente, Cape Verde Islands. C. v. John. C. v. John, Jb. G. R-A. Wien, XLVI, p. 285, 1896. Basalt. Q 6.3 or 3.3 ab 22.5 an 26.4 di 26.2 hy 4.0 mt 9.0 North Kimberley, Griqualand West, South Africa. Dodge. . E. Cohen, N. J. B. B., V, p. 233, 1887. Olivine- diabase. Q 2.6 or 4.4 ab 35.2 an 27.5 di 15.0 hv 12.2 mt 13.5 Pfandstall, Colesberg, Cape Colony. Wetzig. E. Cohen, N. J. B. B., V, p. 245, 1887. Diabase- porphyrite. Sum high. Q 4.3 or 3.3 ab 14.1 an 31.4 di 24.4 hy 12.0 mt 8.6 Philipolis, Orange River Colony. Liepmann. E. Cohen, N. J. B. B., V, p. 244, 1887. Diabase- porphyrite. Sum high. or 5.0 ab 22.5 an 25.9 di 24.0 hy 12.3 ol 6.8 mt 4.2 Kilauea, Hawaii. A. H. Phillips. A. H. Phillips, A. J. S., XLVII, p. 473, 1894. Basalt. Pele’s hair. Q 4.4 or 6.6 ab 16.8 an 28.9 di 13.9 hy 19.8 mt 6.5 il 3.4 Lava of May, 1883, Kilauea, Hawaii. 0. Silvestri. O. Silvestri, B. C. G. It., XIX, p. 135, 1888. Basalt. Q 3.6 or 5.6 ab 17.8 an 29.2 di 18.6 hy 13.5 mt 8.1 il 2.2 Kilauea, Hawaii. O. Silvestri. 0. Silvestri, B. C. G. It., XIX, p. 185, 1888. Basalt. Sum lov r . SUBRANG. NOT NEEDED. ZrOo Fe3-j Cr„0, V 2 0 3 NiO SrO none 0.11 0.03 0.02 0.01 ■ none Q 0.7 or 0.5 ab 4.2 an 52.0 di 3.7 hv 35.7 mt 1.6 McKinsev’s Mill, Cecil County, Maryland. W. F. Hille- brand. A. G. Leonard, B. U. S. G. S. 168, p. 45, 1900. Norite. Not described. ab 11.0 an 48.7 di 16.0 hy 9.3 ol 11.5 mt 3.2 Pikesville, Baltimore County, Maryland. L. McCay. G. H. Williams, B. U. S. G. S. 28, p. 37, 1886. Gabbro-diorite. ■f Cr 2 03 Li 2 0 0.08 trace or 0.6 ab 7.3 an 47.0 di 20.1 hy 3.1 ol 16.0 mt 3.2 Wetheredville, Baltimore County, Maryland. W. F. Hille- hrand. G. H. Williams, 15 A. R. U. S. G. S., p. 673, 1895. Hypersthene- gabbro. NiO 0.06 . ab 10.0 an 37.8 di 31.8 hy 7.8 ol 7.0 mt 1.6 Bagley Canyon, Mount Diablo, California. W.H. Melville. IV. H. Melville, B. G. S. A., II, p. 404, 1891. Gabbro. Near auver- gnose. S CoO none trace Q 6.7 or 0.6 ab 8.4 an 41.1 di 11.8 hy 23.8 nit 6.0 il 0.9 Barima District, British Guiana. J. B. Harrison. J. B. Harrison, Rep. G. N. W. District, II, p. 6, 1898. Diabase. Dried at 11.0°. or 1.7 ab 4.2 an 43.4 di 1.8 hy 25.8 Ol 20.0 mt 2.3 Etang de Lherz, Pyrenees, France. A. Pisani. A. Lacroix, C. R. VIII. Cong. G. Int., p. 833, 1901. Ariegite. an 43.6 lc 0.8 ne 3.7 di 23.8 ol 23.3 am 1. 9 mt 2.1 Etang de Lherz, Pyrenees, France. A. Pisani. A. Lacroix, C. R. VIII. Cong. G. Int., p. 832, 1901. Ariegite. 14128— No. 14- 03 22 338 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS III. SALFEMANE—Continued. RANG 4. I’ERCALCIC. KEDABEKASE—Continued. No. Si0 2 A1,0 3 Fe,O s FeO MgO CaO Na 2 0 k 2 o H 2 0+ H 2 0- C0 2 Ti0 2 pa MnO BaO Sum Sp. gr. 8 42. 32 15.41 2. 69 5. 96 19.25 11.97 1.04 0. 24 1.23 100.11 A3. Ill . 705 . 151 .017 .083 .481 .214 .016 .002 9 38. 95 19.80 3.01 4.54 16. 42 12. 05 0. 89 0. 37 3.36 99. 39 A3. Ill .649 . 195 .019 .063 .411 .215 .014 .004 10 44. 64 18.54 6. 63 4. 65 2. 52 22.17 0. 80 0. 05 0. 18 0. 09 100. 27 A3. Ill .744 .182 .041 .065 .063 .396 .013 .001 11 44. 11 19. 38 5.17 5.44 2. 90 21.98 0. 50 0.13 0. 26 99.87 A3. Ill . 735 .190 .032 .075 .073 .393 .008 .001 CLASS III. SALFEMANE. RANG 1. PERALKALIC. WYOMINGASE. 1 Al. I 50. 23 .837 11.22 .110 3.34 .021 1.84 .026 7.09 .177 5.99 .107 1.37 .022 9.81 .104 1. 72 0. 93 2.27 .028 1. 89 .013 0.05 .001 1.23 .008 100. 62 0. 22 2. 779 13° 100.40 RANG 1. PERALKALIC. WYOMINGASE. 1 48. 90 7. 85 11.46 13. 32 0. 38 1.95 7.40 3. 23 1.80 1.11 99. 39 B2. Ill .815 .077 .072 .185 .010 .035 .119 .034 .016 2 50. 00 9. 87 3. 46 5.01 11.92 8. 31 2. 41 5.02 1.16 0.17 0. 31 0. 73 0. 81 trace 0. 32 100.01 Al. I .833 .096 .022 .070 .298 .148 .039 .053 ,009 .005 .002 RANG 1. PERALKALIC. AVYOMINGASE. 1 50. 70 13. 72 6.07 7. 64 0. 04 0.86 12. 32 1.91 4.84 1.42 100. 56 . A2. II .845 .134 .03£ .106 .001 .015 .199 .020 .020 2 40. 03 10. 88 12. 24 5.12 4.13 11. 74 3. 67 3. 33 2. 22 1.15 5.46 0. 76 trace 100.73 A2. II .667 .107 .077 .071 .103 .210 .059 .035 .068 .005 — 3 48. 39 11.64 4.09 3.57 12. 55 7. 64 4.14 3. 24 2. 56 0. 28 none 0. 73 0. 45 trace 0. 32 99. 90 Al. I .807 .114 .025 .049 .314 .136 .067 .034 .009 .003 — .002 4 45. 72 14.25 4.10 5. 56 2.67 10. 41 5.52 3. 62 4. 80 3. 25 0. 20 100.10 2. 766 A2. II .762 .140 .026 .077 . 067 .186 .089 .038 .041 .001 SALFEMANE-SR 3 OF WYOMINGASE. 339 ORDER 5. PERFELIC. GALLARE—Continued. SUBRANG. NOT NEEDED—Continued. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. or 1.1 di 17.8 Etang de Lherz, A. Pisani. A. Lacroix, Ariegite. Near auver- an 37.0 ol 33.6 lie 4.5 mt 3.9 Pyrenees, France. C. R. VIII. Cong. G. gnose. Int., p. 833, 1901. an 49.2 ol 33.2 Etang de Lherz, A. Pisani. A. Lacroix, Ariegite. ic u. 4 am 6. 9 kp 0.9 mt 4.4 Pyrenees, France. C. R. VIII. Cong. G. ne 4.0 Int., p. 833, 1901. Q 0.5 di 19.5 Keclabek, A. Kupffer. E. C. Federoff, Kedabekite. or 0.6 wo 1<>. 4 ab 6.8 mt 9.5 Elizabethpol, Ann. Inst. Agr. Mosc., an 46.7 Russia. VII, 1901. or 0.6 di 26.4 Kedabek, A. Kupffer. E. C. Federoff, Kedabekite. ab 2.1 wo 10.3 an 52.5 mt 7.4 Elizabethpol, Ann. Inst. Agr. Mosc., ne 1.1 Russia. VII, 1901. ORDER 6. LENDOFELIC. PORTUGARE. SUBRANG 1 . PERPOTASSIC. WYOMINGOSE. S0 3 0.74 or 44.5 ac 7.4 Boar’s Tusk, W. F. Hille- W. Cross, Wvomingite. Cl 0.03 F 0.50 lc 10.5 di 13.9 ne 1.7 ol 7.9 Leucite Hills, brand. A. J. S., IV, Cr„0 3 0.10 il 4.1 W yoming. p. 130, 1897. SrO 0.24 hm 0.8 Ce.,0 3 0.03 ap 4.5 SUBRANG 3. SODIPOTASSIC. Zr0 2 1.96 or 18.9 ac 33.3 Kangerdluarsuk, C. Detlefsen. H. Rosenbusch, Schlieren in Sum low. Cl 0.03 ab -7.9 ns 0.4 ne 8.0 di 8.5 Z 3.0 ol 17.8 Greenland. Elemente, p. 133, 1898. lujavrite. Nearly in dofemane. so 3 Cl F Cr 2 0 3 NiO SrO 0.02 0.08 0.16 0.11 0.07 0.07 or 29.5 di 28.9 ab 8.9 ol 14.8 an 1.1 mt 5.1 ne 6.2 il 1.4 ap 1.7 Beaver Creek, Bear- paw Mountains, Montana. FI. N. Stokes. Weed and Pirsson, A. J. S., I, p. 360, 1896. Shonkinite. SUBRANG 4. DOSODIC. Zr0 2 1.04 or 11.1 ab 26. 7 ne 17.9 Z 1.5 ac 17. 6 ns 5.7 di 3.8 ol 11.3 Kangerdluarsuk, Greenland. C. Detlefsen. H. Rosenbusch, Elemente, p. 215,1898. Arfvedsonite- analcite- tinguaite. or 19.5 ab 4.2 an 3.6 ne 14.5 di 22.3 wo 8.9 mt 0.9 il 10.3 hm 11.7 ap 1.8 Oxford, New Jersey. P. Jannasch. H. Rosenbusch, Elemente, p. 235,1898. Camptonite. Near mon- chiquose. Not fresh. so 3 Cl Cr s 0 3 NiO SrO LioO 0.08 trace 0.07 none 0.15 trace or 18.9 ab 14. 7 an 3.6 ne 11.1 di 24.4 Ol 15.2 mt 5.8 il 1.4 ap 1.1 Bandbox Mountain, Little Belt Mts., Montana. W. F. Hille- brand. L. V. Pirsson, 20 A. R. U.S. G. S., Ill, p. 545, 1900. Analcite-basalt. or 21.1 ab 10.5 an 3.6 ne 19.6 di 16.9 wo 11.2 mt 6.0 il 6.3 Fohberg, Kaiserstuhl, Baden. K. Grass. K. Grass, Mt. Bad. G. L-A. IV, p. 115, 1900. Monchiquite. Near malignose. 340 CHEMICAL ANALYSES OF IGNEOUS ROCKS. CLASS III. SALFEMANE—Continued. RANG 2. DOMALKALIO. MONCHIQUASE. No. Si0 2 A1A Fe 2 0 3 FeO MgO CaO Na,0 K 2 0 h 2 0+ H 2 0 co 2 Ti0 2 i J A MnO BaO Sum Sp. gr. 1 49. 59 14.51 3.51 5. 53 6. 17 9. 04 3.52 5.60 1.95 0. 36 0.15 trace 0. 49 100. 78 Al. I .827 .142 .022 .076 .154 .160 . 056 .060 .004 .001 — .003 2 47. 98 13. 34 4.09 4. 24 7.01 9. 32 3.51 5.00 2.10 1.24 0.58 1.03 trace 0. 50 100. 29 Al. I .800 .131 .026 .059 .175 . 166 .056 .054 .007 .007 — .003 3 46. 73 10. 05 3. 53 8.20 9.25 13.22 1.81 3. 76 1.24 0. 78 1.51 0. 28 100. 54 Al. I .779 .099 . 022 .114 .231 .236 .030 .040 .010 .010 .004 4 48.98 12. 29 2. 88 5. 77 9.19 9.65 2. 22 4. 96 0. 56 0. 26 1.44 0. 98 0.08 0. 43 99. 99 Al. I .816 .120 .018 .080 .230 .172 .036 .053 .018 .007 .001 .003 ■ 5 49. 09 16. 00 7. 14 4.30 5. 02 8. 27 4. 49 4. 79 0. 77 0. 23 • 100.10 A3. Ill .818 .157 .045 .060 .126 .148 .072 .051 .003 6 45.19 10. 49 8. 60 5. 04 5. 97 12. 94 2. 04 4. 09 3.31 0. 77 1.01 0.50 100.15 A2. II .753 .104 .054 .070 .149 .231 .033 .043 .013 .007 7 43. 85 15. 25 7. 63 4. 57 4. 47 8. 54 4. 22 4.04 1.80 0. 63 1.67 3.25 0. 79 A QQ U. DO 101.04 2. 778 B2. Ill .731 .150 .048 . 063 .112 .153 .068 .043 .041 .005 .005 8 49. 65 14. 39 4.21 3.48 6. 27 10.12 3. 21 5. 46 2. 37 0. 79 0. 25 100.19 A3. Ill .828 .141 .026 .049 . 157 .180 .051 .059 .005 .004 RANG 2. DOMALKALIC. MONCHIQUASE. 1 48. 35 13. 27 4.38 3. 23 8.36 9.94 3.35 3.01 2. 89 0. 90 0. 30 0. 52 0. 40 0.19 0. 54 100.01 Al. I .806 .130 .027 .044 .209 .177 .054 .032 .006 .003 .003 .004 2 47.82 13. 56 4. 73 4. 54 7. 49 8.91 4. 37 3. 23 3.37 0. 67 1.10 trace 0. 50 100. 20 Al. I .797 .133 .029 .062 .187 .159 .071 .034 .008 .008 .003 3 44.66 12.12 5.81 3. 20 8.77 8.14 4.47 2. 75 4.33 2.19 1.02 2. 02 0.21 99. 69 A2. II .744 .119 . 036 .044 .219 .145 .072 .029 .012 .014 .003 4 45. 59 12. 98 4. 97 4. 70 8. 36 11.09 4. 53 1.04 3. 40 0.51 1.32 0.91 0.14 0.13 99.87 Al. I .760 .127 .031 ’ .065 .209 .198 .072 • .011 .016 .006 .002 .001 5 49. 09 11.98 6. 22 7. 94 7.62 10. 59 3. 93 2.00 n. d. 0. 58 0. 50 100. 45 2. 33 A2. II .818 .117 .039 .110 .191 .189 .063 .021 .007 .004 6 46. 48 16.16 6. 17 6. 09 4.02 7.35 5. 85 3. 08 4.27 0. 45 0. 99 100. 91 2. 723 A2. Ill . 775 .158 .039 .085 .101 .131 .094 .033 .012 7 44. 39 13.12 4.19 7.38 9. 54 9. 55 4.17 2. 22 1.96 0.16 2. 40 0.93 100.18 A2. II .740 .129 .026 .103 .238 .170 .068 .023 .030 .006 8 43. 84 12. 82 8.99 5.11 2.39 13.57 3. 52 2.90 3.12 3. 55 99.81 2.859 A3. Ill .731 .125 .056 .071 .060 .242 .056 .031 .044 SALFEMANE-MONCHIQUOSE. 341 ORDER 6. LENDOFELIC. PORTUGARE—Continued. SUBRANG 3. SODIPOTASSIC. SHONKINOSE. Inclusive. Norm. so 3 0.02 or 33.4 di 30.0 Cl 0.13 an 7.2 ol 5.9 SrO 0.21 ne 15.0 mt 5.1 il 0.6 S0 3 trace or 30.0 di 27.8 Cl 0.21 ab 4.7 ol 5.4 SrO 0.14 an 5.8 mt 6.0 ne 13.3 il 1.1 ap 2.2 Cl 0.18 or 22.2 di 40.1 an 8.2 ol 10.3 ne 8.5 mt 5.1 il 1.5 ap 3.2 F 0.22 or 29.5 di 26.5 Cr.,0 3 trace ab 5.3 ol 11.7 SrO 0.08 an 8.6 mt 4.2 LinO trace ne 6.8 il 2 . 6 ap 2.2 S0 3 trace or 28.4 di 25.0 ab 7.9 ol 2.1 an 9.5 mt 10.4 ne 16.2 MoSo 0.20 or 23.9 di 33.3 an 7.8 wo 5.8 ne 9.4 mi 12.5 il 2.0 or 23.9 di- 20.7 ab 7.9 ol 1.5 an 10.8 mt 5.1 ne 15.1 il 6.9 hm 4.2 ap 1.9 or 32.8 di 28.9 ab 3.1 ol 3.6 an 8.6 mt 6.0 ne 12.8 ap 1.8 Locality. Davis Creek, High wood Mts., Montana. Near High wood Peak, High wood Mts., Montana. Square Butte, High wood Mts., Montana. Yogo Peak, Little Belt Mts., Montana. Laacher See, Rh. Prussia. Rosengiirtchen, Heubach, Hesse. Ziegenberg, Neste rsitz, Bohemia. Near Ivhoi, Persia. Analyst. E. B. Hurlbut. IE W. Foote. L. Y. Pirsson. \V r . F. Ilille- brand. W. Bruhns. K. Tichauer. F. Hanusch. J. Steinecke. Reference. Author’s name. Remarks. L. V. Pirsson, B. U. S. G. S., 148, p. 153, 1897. Leucite- syenite. L. V. Pirsson, B.U.S.G.S., 148, p. 153, 1897. Leucite-basalt. Weed and Pirsson, B. G.S. A., VI, p. 414, 1895. Shonkinite. MgO corrected, L. V. P., priv. contrib. 9.68 in.original. Weed and Pirsson, A. J. S., L., p. 474, 1895. Shonkinite. Also in 20 A. R. U.S. G.S.,111, p. 484, 1900. W. Bruhns, cf. N. J. 1892, II, p. 418. Trachyte. R. W T edel, Jb. Pr.G. L-A., XI, p. 33,* If 92. Nephelite- basalt. J. E. Hibsc.h, T. M.P. M.,XIV, p. 101, 1894. Camptonitic monchiquite. Sum high. Not fresh. J. Steinecke, Z. Nw. Halle, YI, p. 12, 1887. Leucitophyre. P 2 Cb given as 1.08 II 3 P0 4 . SUBRANG 4. DOSODIC. MONCHIQUOSE. F 0.25 or 17.8 di 27.2 Cr.,0 3 trace ab 14.7 ol 6.7 Ni'O 0.04 an 12.2 mt 7.2 SrO 0.09 ne 7.4 il 0.9 Li.,0 trace ap 1.0 so 3 trace or 18.9 di 23.9 Cl 0.04 ab 17.8 ol 7.4 SrO 0.14 an 7.8 mt 8.0 ne 10 5 il 1.2 ap 2.5 or 16.1 di 18.4 ab 19.9 ol 9.4 an 5.0 mt 8.4 ne 9.7 il 1.8 ap 4.5 ZrOo 0.03 or 6.1 di 30.0 Cl 0.05 ab 18.9 ol 6.5 SrO 0.12 an 12.2 mt 7.2 Li 2 0 trace ne 10.2 il 2.5 ap 1.9 or 11.7 di 32.1 ab 9.2 ol 8.7 an 21.0 mt 9.0 ne 6.5 il 1.1 ap 1.2 or 18.3 di 22.3 ab 14.1 ol 2.9 an 8.6 mt 9.0 ne 19.0 il 1.8 S0 3 0.17 or 12.8 di 24.8 ab 10.5 ol 13.1 an 10.6 mt 6.0 ne 13.6 il 4.6 ap 2.0 or 17.2 di 13.0 ab 12.1 wo 16.7 an 10.6 mt 6.3 ne 9.4 il 6.8 1 hm 4.8 Big Baldy Mountain, Little Belt Mts., Montana. High wood Gap, High wood Mts., Montana. Musselshell River, Crazy Mountains, Montana. “The Basin,’’ Cripple Creek, Colorado. Santa Maria, Puebla, Mexico. Santa Ciuz R. R., Cabo Frio, Brazil. Freidrichstollen, Allendorf, Rh. Prussia. Blankenhornberg, Kaiserstuhl, Baden. W. F. Hille- brand. L. V. Pirsson, 20 A. R. U. S. G. S., Ill, p. 548, 1900. Analcite-basalt. Near shonkin- ose. H. W. Foote. L. V. Pirsson, B. U. S. G. S., 148, p. 153, 1897. Monchiquite. L. G. Eakins. W. H. Weed, B. U. S. G. S., 148, p. 144, 1897. Monchiquite? Not described. W. F. Hille- brand. W. Cross, J. G., V., p. 689, 1897. Analcite-basalt. Not fresh A. Hoppe. A. Hoppe, in Felix and Lenk, Btr. G. Mex., II, p. 220, 1899. J Basalt. Dried before analysis? M. Hunter. Hunterand Rosenbusch, T. M. P. M., XI, p. 454, 1890. Monchiquite. Border of es- sexose. Not stated. F. Beyschlag, Erl.G. Kt. Preus. Bl. Allendorf, p. 47, 1886. Basalt. K. Gruss. K. Gruss, Mt. Bad. G. L-A., IV, p. 126, 1900. Leucite- basanite. 342 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS Ill. SALFEMANE—Continued. KANG 2. DOMALKALIC. MONCHIQUASE—Continued. No. SiO., Al./ >3 Fe 2 0 3 FeO MgO CaO Na 2 0 k 2 o h 2 0+ H 2 0- co 2 TiO a P-A MnO BaO Sum Sp. gr. 9 47. 83 16.09 4. 32 3.62 5.53 10. 68 4.46 4.05 0. 24 0. 05 2.27 1.33 trace 100. 47 2. 858 A2. II .797 .158 .027 .050 .138 .191 .072 .043 .028 .009 10 45. 56 14. 43 7. 71 6. 07 0. 87 9.23 5. 57 2. 45 2. 79 0. 49 0. 25 1. 73 1.02 1.47 99. 64 2. 759 A2. II . 759 .141 .048 .084 .022 .165 .090 .026 .022 .007 .021 11 43. 35 11.46 11.98 2. 26 11.69 7. 76 3. 88 0. 99 2.41 0. 59 2. 43 1.54 100. 34 2. 974 A2. II .723 .112 . 075 .031 .292 .138 .063 .011 .030 .011 12 44. 64 12. 74 4. 21 11.17 5.82 10.12 4.31 1.41 0.51 5. 86 0.20 100. 99 B2. III. .744 . 125 .026 .156 .146 .180 .069 .015 .073 CC o o 13 44.63 13. 77 7. 30 5. 60 4. 47 7. 96 4. 20 2. 65 4.04 1.34 4.25 0. 09 0. 08 100. 43 A.2 II .744 .135 .045 .078 .112 .142 .068 .029 . 053 .001 .001 14 45. 61 15. 70 6.17 7. 29 4. 84 6. 34 5. 06 2. 67 2.34 3. 48 trace 99. 50 2.87 A3. Ill .760 .154 .039 .101 .121 .112 .081 .029 .044 RANG 3. ALKALICALCIC. LIMBURGASE. 1 42. 46 12.04 2. 19 5.34 12.40 12.14 1.21 2. 68 4. 03 | 0.55 2. 47 0. 84 0.16 99.51 2.94 A2. II .708 .118 .014 .074 .310 .217 .020 .029 .031 .006 .002 2 43. 74 14. 82 2. 40 7.52 6. 98 10.81 3. 08 2.90 2. 94 1.50 2.80 0. 64 100.23 2. 914 A2. II G .729 .145 .015 .104 .175 .193 .050 .031 .035 .004 RANG 3. ALKALICALCIC. LIMBURGASE. 1 45.11 12.44 2. 67 9. 36 11.56 10. 61 3. 05 1.01 0. 78 0.16 2. 34 0.51 0. 22 trace 100. 02 3.118 Al. I . 752 .122 .017 .130 .289 .189 .049 .011 .029 .003 , .003 — 20° 2 42. 35 12. 29 3. 89 7. 05 13. 09 12. 49 2. 74 1.04 1.50 0. 32 1.82 0. 99 0.21 0.10 100.19 3.122 Al. I .706 .120 .024 .098 .327 .223 .043 .011 .023 .007 .003 .001 22° 3 43.66 17.35 7. 88 5.40 4. 27 9. 39 5.12 2. 07 1.99 1.21 1.32 99. 66 A2. II .728 .170 .019 . 075 .107 .167 .083 .022 .015 .009 4 44. 82 13. 68 2. 76 7. 57 10.11 12. 76 2. 83 0.89 2.81 1.35 0.15 99. 73 3. 016 A2. II . 747 .134 .017 .106 .253 .227' .045 .009 .017 .001 5 42.13 16. 31 6. 43 7. 93 7.37 9. 62 2. 27 2. 48 3.16 2.12 0.50 100. 32 2. 98 A3. Ill .702 .160 .040 .110 .186 .171 .037 .026 .007 6 39.13 11. 38 7.33 8.13 8.64 11.77 2. 47 1.93 2. 87 2.41 4. 02 0.42 100. 50 3. 07 A2. II .652 .ill .045 .112 .216 .210 .040 .020 .050 .006 7 43.65 11.48 6. 32 8. 00 7.92 14. 00 2. 28 1.51 1.00 trace 4. 00 trace 100.16 A2. II .728 .114 .039 .111 .198 .250 .037 .016 .0.50 — SALFEMANE-LIMBURGOSE. 343 ORDER 6. LENDOFELIC. PORTUGARE—Continued. SUBRANG 4. DOSODIC. MONCHIQUOSE—Continued. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. SrO none or 23.9 di 23.9 Falkenberg, Tetschen, R. Pfohl. J. E. Hibsch, Leucite- LioO none ab 6.3 ol 1.9 an 14. 7 mt 6.3 Bohemia. T. M.*P. M., XIV, tephrite. nel6.8 il 4.3 p. 105, 1894. ap 2.8 S0 3 trace or 14.5 di 8.5 Schichenberg, Tet- F. Hanusch. J. E. Hibsch, Nephelite- MnO high? ab oU.4 wo y.o an 7.0 mt 11.1 schen, Bohemia. T. 31. P. 31., XIV, tephrite. ne 9.1 il 3.4 p. 104, 1894. ap 2.2 or 6.1 di 14.5 Hutberg, Tetschen, R. Pfohl. J. E. Hibsch, Augitite. ab h.'l ol 15.8 an 10.6 mt 0.2 Bohemia. T. 31. P. 31., XIV, ne 3.1 il 4.6 p. 110, 1894. hm 11.8 ap 3.4 or 8.3 di 31.4 Island of 1891, II. Foerstner. H. Foerstner, Basalt. Sum high. ab 16.2 ol 5.3 an 11.4 mt 6.0 n. Pantelleria, T. 31. P. 31., XII, ne 10.8 il 11.2 Mediterranean. p. 512, 1891. CuO 0.05 or 16.1 di 22.6 Banatette River, O. Pufahl. A. Wichmann, Samml. Foyaite. ab iy. 4 ol 0.5 an 10.6 mt 6.0 Kupang Bay, G. 31us. Leiden, 11, ne S. 8 il 8.2 Timor Island. p. 87, 1887. hm 3.0 SnO» trace or 16.1 di 15.0 Franklin Island, G. T. Prior. G. T. Prior, Basalt. Near essexose. ab 21.5 ol 5.4 an 12.2 mt 9.0 Antarctic. 31 in. 31ag., XII, ne 11.4 il 6.6 p. 80, 1899. SUBRANG 3. SODIPOTASSIC. OUROSE. LioO trace or 12.2 di 29.8 an 19.2 ol 14.5 lc 3.1 mt 3.2 ne 5.7 il 4.8 ap 1.9 Willow Creek, Castle Mountains, 31on- tana. L. V. Pirsson. Weed and Pirsson, B. IT. S. G. S., 139, p. 115, 1896. 3Ionchiquite. Cl s trace 0.10 or 17.2 di 26.3 ab 3.1 ol 8.7 an 17.8 mt 3.5 ne 12.5 il 5.4 ap 1.3' Rio do Ouro, Serra de Tingua, Brazil. P. Jannasch. Hunter and Rosenbusch, T. M. P. 31., XI, p. 464, 1890. Monchiquite. Not fresh? SUBRANG 4. DOSODIC. LIMBURGOSE. Cl 0.11 or 6.1 di 26.4 s 0.01 ab 13.1 ol 19.8 Voo 3 0.04 an 17.2 mt 3.9 NiO 0.04 ne 6.8 il 4.3 SrO trace ap 1.1 LioO trace ZrOo none or 6.1 di 30.2 so 3 ‘ 0.05 ab 3.7 ol 17.9 S trace an 18.3 mt 5.6 Cr»0 3 0.10 ne 10. 2 il 3.5 YoO, 0.04 ap 2.2 Nio 0.03 SrO 0.09 / or 12.2 di 16.6 ab 1U ol 3.0 an 18.1 mt 11.4 ne 14.5 il 2.3 ap 2.8 or 5.0 di 31.8 ab 7.3 ol 14.2 an 23.4 mt 3.9 ne 8.8 il 2.6 or 13.5 di 16.8 ab 5.2 ol 14.4 an 27.0 mt 9.3 ne 7.7 or 9.5 di 34.7 an 14.2 ol 5.5 lc 1.3 mt 10.4 ne 11.4 il 7.7 or 8.9 di 41.6 ab 5.8 ol 2.3 an 17.0 mt 9.0 ne 7.4 il 7.7 Pinto Mountain, Uvalde County, Texas. Ciruella, Colfax County, New Mexico. Island of Cabo Frio, Rio Janeiro, Brazil. Las Amolanas, Atacama, Chile. Wart of Skaill, Sandwick, Orkney Islands. Hoxa, Orkney Islands. Brandberget, Gran, Norway. W. F. Hille- W. Cross, brand. B. U. S. G. S., 168, p. 61, 1900. W. F. Hille- brand. W. Cross, B. U. S. G. S., 168, p. 171, 1900. M. Dittrich. H. Rosenbusch, Elemente, p. 172, 1898. 31. Dittrich. J. S. Flett. J. S. Flett. L. Schmelck. F. v. Wolff, Z. D. G. G., LI, p. 506, 1899. J. S. Flett, Tr. R. Soc. Edinb., XXXIX, p. 887,1900. J. S. Flett, Tr. R. Soc. Edinb., XXXIX, p. 887,1900. IV. C. Brugger, Q. J. G. S., L, j). 19, 1894. Basalt. Nephelite- basanite. Essexite. Limburgite. Camptonite. Camptonite. Olivine- gabbro- diabase. Near monehi- quose. Not fresh. Not fresh. 344 CHEMICAL ANALYSES OF IGNEOUS ROCKS. CLASS III. SALFEMANE—Continued. RANG 3. ALKALICALCIC. LIMBURGASE—Continued. No. Si0 2 AlA Fe-A FeO MgO CaO Na,U k 2 o h 2 o+ H 2 0- co* Ti0 2 PA MnO BaO Sum Sp. gr. 8 40. 60 12. 55 5. 47 9. 52 8. 96 10. 80 2.54 1.19 2. 28 2. 68 4. 20 100.79 B2. nr .677 .123 .034 .133 . 224 • .193 .041 .013 .053 9 37. 90 13.17 8. 83 8. 37 9. 50 10. 75 2. 35 2.12 1.40 5.30 trace 99. 69 A2. II .632 .129 .055 .116 .238 .192 .039 .022 .066 — 10 43. 50 14. 74 6. 53 5.'32 3. 19 14. 93 3.49 2. 11 3.69 2.55 0.61 100. 66 2. 932 A2. II .725 .144 .041 .074 .080 .266 .056 .022 .032 .004 11 43.18 13. 43 5. 06 6.41 11. 79 10.39 3. 05 1.41 2.36 0. 43 2.16 0. 38 101.08 3.021 B2. Ill .720 .132 .032 .089 .295 .185 .050 .015 ■ .027 .003 12 41.80 12. 43 6. 29 4. 84 . 13.62 10. 88 3. 40 1. 71 2.17 0. 65 2.15 trace 101.01 3. 011 B2. Ill .697 . 121 .039 .067 .341 .194 . 055 .018 .027 — 13 43.10 11.71 4. 43 8. 28 13. 20 10. 84 2. 78 1.27 1.71 1.88 0. 49 99. 78 3. 088 A2. II .718 .114 .027 .115 .330 .193 .045 .014 .023 .004 • 14 44.81 15. 35 3.37 6. 69 12. 77 9. 83 3.03 1.69 2. 13 0. 48 100.31 2. 98 A3. Ill .747 .150 .021 .093 .319 .175 .018 .018 .003 15 42. 32 12.11 4.97 6.13 15. 21 91 78 2. 66 1.92 2.17 0. 62 2.17 0. 26 0.14 101.56 3. 069 C2. IV .706 .119 .031 .085 .380 .175 .043 .020 .027 .002 .002 19° 16 42. 02 13.86 5.81 5. 84 10. 39 11.43 3. 61 0. 86- 2.41 0. 56 1.88 0.11 0. 31 101.28 3. 028 C2. IV .700 .136 .036 .081 .260 .203 .058 .009 .023 .001 .004 19° 17 44. 78 12. 76 5. 42 8.34 10.17 10. 23 3.56 1. 81 1.42 0. 93 0. 25 0.92 100. 59 2. 952 A2. II . 746 .125 .034 .116 .254 .182 .057 .020 .003 .006 18 43. 63 14.14 7. 72 4. 96 9. 73 11.83 2. 84 1.45 3. 22 trace 0.94 100. 46 2. 934 A3. Ill .727 .138 .049 .069 .243 .210 .045 .016’ — .006 19 41. 58 16. 96 8. 06 4. 61 10. 76 11.12 4. 23 1.23 1. 74 trace 0. 41 100. 70 3. 00 A3. Ill .693 .166 .050 .064 .269 .198 .068 .013 — .003 20 42. 75 17.24 8.10 5. 88 | 6.17 11. 14 4.21 2.48 . 1.06 2.13 trace 101.16 3.008 B2. Ill .713 .169 .051 .082 .154 .199 .068 ! .026 .027 — RANG 4. DOCA.LCIC. 41. 99 17.58 6.17 8. 33 8.03 8. 53 2.12 2. 81 2. 99 1.80 0. 29 100.64 3.01 .700 .172 .039 .115 .201 .151 .034 .030 .004 A3. Ill SALFEMANE-LIMBURGOSE. 345 ORDER 6. LENDOFELIC. PORTUGARE—Continued SUBRANG 4. DOSODIC. LIMBURGOSE—Continued. Inclusive. Norm. or 7.2 di 27.6 ab 6.8 ol 11.1 an 19.2 mt 7.9 ne 8.0 il 8.2 or 7.2 di 26.9 an 18.9 ol 8.0 lc 3.9 mt 11.6 ne 11.1 il 10.2 hm 0.8 or 12.2 di 17.3 ab 11.0 wo 12.4 an 18.3 mt 9.5 ne 9.9 il 5.1 • ap 1.4 X 0.80 or 8.3 di 26.1 Cl 0.23 ab 7.3 ol 15.0 an 18.6 mt 7.4 ne 10.2 il 4.2 X 0.94 or 10.0 di 31.6 so 3 0.13 an 13.3 ol 13.8 C1‘ trace ne 15.6 mt 9.0 il 4.2 so 3 0.09 or 7.8 di 27. 7 ab 6.3 ol 20.4 an 15.3 mt 6.3 ne 9.4 il 3.5 np 1.2 Cl 0.16 or 10.0 di 17.8 ab 7.9 ol 23.6 an 23.4 mt 4.9 ne 9.4 ap 1.1 X 0. 94 or 11.1 di 26.0 so 3 trace ab 0.5 ol 21.1 Cl 0.16 an 15.6 mt 7.2 ne 11.9 il 4.2 X 1.99 or 5.0 di 29.7 Cl 0.20 ab 6.8 ol 10.3 an 19.2 mt 8.4 ne 12.8 il 3.5 so 3 trace or 11.1 di 25.6 ab 10.0 ol 17.3 an 13.3 mt 7.9 ne 10.8 ap 2.0 or 8.9 di 25.4 ab 11.0 ol 10.5 an 21.4 mt 11.4 ne 6.8 ap 1.9 or 7.2 di 22.7 ab 1.6 ol 12 .9 an 23.6 mt 11.6 ne 18.5 ap 1.0 or 14.5 di 27.1 ab 0.5 ol 2.5 an 20.9 mt 11.8 ne 19.0 il 4.2 Locality. Maena, Gran, Nor¬ way. Brandberget, Gran, Norway. Limberg, Kaiserstuhl, Baden. Ulmenstein, Rhongebirge. Pietzelstein, Rhongebirge. Ilmenberg, Rhongebirge. Steller’s Kuppe, Hesse. Schaumburg, n. Cassel, Hesse-Nassau. Hunrodsberg, n. Cassel, Hesse-Nassau. Hiinenberg, Bl. Melsungen, Prussia. Bachelsdorf, Tetschen, Bohemia. Bachelsdorf, Tetschen, Bohemia. Scharfenstein, Bohemia. Analyst. Reference. Author’s name. Remarks. V. Schmelck. W. C. Brugger, Q. J. G. S., L, p. 26, 1894. Camptonite. Not fresh. V. Schmelck. W. C. Brogger, Eg. Kg., Ill, p. 93, 1899. Hornblendite. K. Grass. K. Grass, Mt. Bad. G. L-A., IV, p. 134, 1900. Augitite. E. Moller. E. Moller, N. J., 1888, I, p. 112. Limburgite. Sum high. E. Muller. E. Moller, N. J., 1888, I, p. 116. Nephelite- basalt. Sum high. Kltiss. H. Proescholdt, Jb. Pr. G. L-A., XIV, p.12, 1894. Basalt. II. Wolff. K. Oebbeke, Jb. Pr. G. L-A., IX, p. 402, 1889. Nephelite- basanite. O. Fromm. O. Fromm, Z. D. G. G., XLIII, p 68, 1891. Limburgite. Sum high. O. Fromm. 0. Fromm, Z. D. G. G., XLIII, p. 75, 1891. Nephelite- basalt. Sum high. G. F. Steffen. F. Beyschlag, Erl. G. Kt. Preus. Bl. Melsungen, p. 20, 1891. Basalt. R. Pfohl. J. E. Hibsch, T. M. P. M., XV, p. 247, 1896. Basalt. R. Pfohl. J. E. Hibsch, T. M. P. M., XV, p. 247, 1896. Basalt. Near etindose. R. Pfohl. J. E. Hibsch, T. M. P. M., XVII, p. 48, 1897. Basalt. Sum high. SUB RANG 2. SODIPOTASSIC. or 16.7 di 9.7 ab 4.2 ol 18.4 an 30. 0 mt 9.0 ne 7.4 Rennibuster, Orkney Islands. J. S. Flett. J. S. Flett, Tr. R. Soc. Edinb., XXXIX, p. 887,1900. Camptonite. Properly in lim- burgose, if Ti0 2 were de¬ termined. Cf. Nos. 5 and 6. 340 CHEMICAL ANALYSES OF IGNEOUS ROCKS. CLASS III. SALFEMANE—Continued. RANG 4. DOCALCIC. No. Si0 2 A1A Fe 2 0 3 FeO MgO CaO Na.,0 KoO h 2 o+ h 2 o- C0 2 Ti0 2 i J A MnO BaO Sum Sp. gr. 1 38. 58 20. 42 7.60 5.91 12. 93 9. 43 2. 29 1.39 1.25 99.80 A3. Ill .643 .200 .048 .082 .323 .168 .037 .015 2 41.18 17.94 9.81 1.16 11.18 12.38 3.15 0.93 2. 03 0. 50 100.26 3. 064 A3. Ill .686 . 176 . 061 .017 .280 .221 .051 .010 .006 3 41.13 18.18 4. 71 7. 64 10. 59 13. 20 2.00 1.59 1. 74 100.78 A3. Ill .686 .178 .029 .106 .265 .235 .032 .017 4 42.71 16. 03 9.31 1.83 10. 44 14. 70 2. 71 0. 24 2. 78 100.75 A3. Ill .712 .157 .058 . 025 .261 .262 .043 .003 5 39. 84 19. 71 7. 73 8. 89 7.33 13. 52 1.59 0. 53 0. 86 0. 08 trace trace 100. 08 3.182 A2. II .664 .193 .049 .124 .183 .241 .026 . 006 .001 — — 15° 6 38. 62 13. 90 5. 97 8.65 11.21 15. 54 2. 01 0.57 1.46 1.86 0.60 0.30 100. 69 A2. II .644 .136 .037 .121 .280 .277 .032 .007 .023 .004 .004 CLASS III. SALFEMANE. RANG 1. PERALKALIC. MALIGNASE. 1 47. 85 13. 24 2. 74 2. 65 5.68 14. 36 3. 72 5. 25 2. 74 2. 42 100. 65 2. 879 A3. Ill .798 .130 .017 .037 .142 .256 .060 .056 .017 RANG 1. PERALKALIC. MALIGNASE. 1 51. 88 14.13 6. 45 0. 94 3.44 10. 81 6. 72 4.57 0. 18 0. 33 0. 96 9 100.41 2. 88 A2. II .865 .139 . .040 .013 .086 .193 .108 .049 .004 .007 2 51.38 15.88 1.48 4.37 4.43 8. 62 7.57 4. 20 0. 42 0.12 0. 98 99. 45 A2. II .856 .156 .009 .061 .ill .154 .122 .045 .002 .007 3 44. 65 13. 87 6. 06 2. 94 5.15 9.57 5. 67 4.49 2.10 0. 96 0.11 0. 95 1.50 0.17 0. 76 99. 92 Al. I .744 .136 .038 .041 .129 .171 .091 .048 .012 .011 .002 .005 4 42.02 12. 05 7. 93 5.06 2.18 17.01 4.95 3. 15 0. 67 2.36 1.66 0.96 100. 54 .34 A2. II .700 .118 .050 .071 . 055 .304 .080 .034 .029 .012 .014 100.20 RANG 2 . DOMALKALIC. KAMERUNASE. 1 46. 04 12. 23 3. 86 4.60 10. 38 8.97 2. 42 5. 77 2. 87 0. 64 1.14 trace 0. 48 99. 76 Al. I . 767 .120 .024 .064 .260 .160 .039 .062 .008 .008 — .003 SALFEMANE-SR 3 OF KAMERUNASE. 347 ORDER 6. LENDOFELIC. PORTUGARE—Continued. SUBRANG 3. PRESODIC. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. or 1.1 an 41.1 le 5.7 ne 10.5 di 4.3 ol 24.7 mt 11.1 Lherz, Pyrenees, France. A. Pisani. A. Lacroix, C. R. VIII. Cong. G. Int., p. 833, 1901. Ariegite. or 4.5 an 32.0 lc 0.9 ne 14.5 di 22.9 ol 12.2 mt 2.6 il 0.9 hm 8.0 Kreuzberg, Rhongebirge. E. v. Seyfried. E. v. Sevfried, cf. N. J., 1898, II, p. 65. Basanite. Iron oxides? an 35.9 lc 7.4 ne 9.1 di 16.7 ol 19.2 am 3.2 mt 6.7 Eckmannshain, Vogelsberg, Hesse. H. Sommerlad. H. Sommerlad, N. J., 1884, II, p. 223. Leucite-basalt. or 1.7 ab 3.7 an 30. 9 ne 10.2 di 32.6 ol 7.7 mt 5.8 hm 5.3 Burberg, n. Carlsbad, Bohemia. J. M. Clements. J. M. Clements, Jb. G. R-A. Wien, XL., p. 345, 1890. Basalt. Iron oxides? or 3.3 ab 0.5 an 44.8 ne 7.1 di 18.3 ol 13.9 mt 11.4 Pavone, n. Ivrea, Piedmont. M. Dittrich. F. R. van Horn, T. M. P. M., XVII, p. 414, 1898. Hornblende- gabbro. an 27.0 lc 3.1 ne 9.1 di 17.9 ol 19.7 am 8.8 mt 8.6 il 3.5 ap 1.3 Dakar Peak, Cape Verde Islands. C. v. John. C. v. John, Jb. G. R-A. Wien, XLVI, p. 288, 1896. Limburgite. ORDER 7. LENFELIC. KAMERUNARE. SUBRANG 3. SODIPOTASSIC. or 23.4 di 35.6 Poohbah Lake, F. L. Ransome. A. C. Lawson, Nephelite- an 3.9 wo 3.3 1c fi 1 mt, 4 0 Rainy River dis- B. Dep. G. Un. Cal.. pyroxene- ne 17.0 ap 5.3 trict, Ontario. I, p. 350, 1896. malignite. SUBRANG 4. DOSODIC. MALIGNOSE. or 27.2 ac 8.3 ab 7.9 'di 18.5 * ne 21.3 wo 10.0 mt 2.1 il 0.6 hm 2.0 ap 2.2 or 25.0 ac 4.2 ab 2.6 di 36.8 ne 27.3 ol 0.7 ap 2.2 so 3 0.61 or 26.7 di 27.9 Cl trace ab 2.6 wo 0.2 SrO 0.37 an 1.1 mt 6.6 Li 2 0 trace ne 18.5 il 1.8 no 5.0 hm 1.4 ap 3.5 S 0.54 or 18.9 di 11.9 ab 1.6 wo 23.8 an 1.1 mt 9.7 ne 21.9 il 4.5 hm 1.3 ap 4.0 Poohbah Lake, Rainy River district, Ontario. Poohbah Lake, Rainy River district, Ontario. Gordon’s Butte, Crazy Mountains, Montana. As, Alno, Sweden. W. C. Blasdale. A. C. Lawson, B. Dep. G. Un. Cal., I, p. 356, 1896. J. W. Sharwood. A. C. Lawson, B. Dep. G. Un. Cal., I, p. 359, 1896. W. F. Hille- brand. J. E. Wolff, B. U. S. G. S., 150, p. 201, 1898. X. Sahlbom. X. Sahlbom, X. J., 1897, II, p. 99. Garnet- pyroxene- malignite. Amphibole- malignite. Theralite. Ijolite- porphyry. Sum low. SUBRANG 3. SODIPOTASSIC. SO-, trace or 22.2 di 26.3 Arrow Peak, II. W. Foote. L. V. Pirsson, Leucite-basalt? Cl 0.11 SrO 0.25 an 5.3 ol 12.3 lc 9.6 mt 5.6 High wood Moun- B. U. S. G. S., 148, ne 11.1 il 1.2 tains, Montana. p. 153, 1897. ap 2.6 . 348 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS III. SALFEMANE—Continued. RANG 2. DOMALKALIC. KAMERUNASE. No. Si(>2 A1A Fe 2 0 3 FeO MgO CaO Na 2 0 K^O h 2 o+ H.,0— co 2 Ti0 2 P-A MnO BaO Sum Sp. gr. 1 44. 31 17. 20 4. 64 3. 73 6. 57 10. 40 4. 45 3. 64 3. 30 0. 77 0.10 99.11 B3. IV .739 .169 .029 .051 .164 .185 .072 .038 .001 2 41.80 14.56 6. 09 6.41 4. 66 14. 87 4.25 1.94 1. 18 0.40 4.14 0. 52 100. 82 B2. Ill .(197 .143 .038 .089 .117 . 265 . 069 .021 .052 .004 3 47. 10 16. 42 4.63 7.04 5. 00 7. 64 6. 36 • 3.47 0. 40 1. 75 0. 48 0. 36 100.65 A2. II .785 .161 .029 .098 .325 .136 .103 .037 . 022 .003 . 005 4 45. 77 16. 66 3. 72 6. 21 7.03 9.01 6. 23 2. 28 1.87 trace 1.70 0. 29 trace 100. 27 A2. II . 763 .158 .023 . 086 .176 .161 .105 .024 — .021 .002 — 5 42. 77 14.16 . 5.05 6.26 2. 69 14. 34 4. 67 2.51 3.60 3. 05 0.30 99. 40 2.904 A3. Ill .713 .139 .032 .087 .067 .255 . 075 .027 .038 .002 6 39. 88 15. 37 8. 67 2. 91 7. 16 13. 83 4. 73 2.01 2.17 1.04 2. 29 trace 100. 06 2. 918 A2. II .665 .150 .054 .040 .179 .246 .076 .022 .013 .016 — ' 7 48. 87 12.11 3.17 10. 21 3. 52 15. 18 5.11 1.81 0. 58 0. 72 trace 101.28 3.10 B2. Ill .815 .119 .020 .142 .088 .271 .082 .019 .009 — 8 46. 53 14.31 3.61 8.15 6. 56 12. 13 4.95 1.58 0. 20 2. 99 0. 22 101.23 2. 96 B2. Ill . 776 .140 .023 .113 .164 .217 .080 .018 .036 .003 * 9 40.10 15.27 10.13 1.85 4. 59 12.08 4. 78 3. 34 2. 93 0. 23 3.64 0. 87 0.08 99. 89 2.91 A2. II .668 .150 .063 .026 .115 .216 .077 .035 .046 .006 .001 10 39. 97 17.30 7.41 3.05 3. 82 10. 53 5.14 3. 56 4.11 0. 33 3. 34 0. 84 0. 09 99.89 2. 86 At. I .666 .170 .046 .043 .096 .387 .083 .038 .042 .006 .001 11 39. 30 13. 66 7.42 4.45 4. 46 11.37 5. 78 1.44 4. 53 0.15 3. 62 0. 85 0. 08 99. 76 2. 79 0.11 At. I . 655 .134 .046 .062 .112 .203 .093 .016 .045 .006 .001 99.65 RANG 3. ALKALICALCIC. ETINDASE. 1 36.40 12. 94 8. 27 4.59 11.44 14.46 0.97 3.01 2.36 3. 94 0.42 1.04 99. 84 A2. II .607 .127 . 052 .064 . 286 .258 .016 .032 i . 005 .007 salfemane-SR 3 OP 1 etindase. 349 ORDER 7. LENFELIC. KAMERUNARE—Continued. SUBRANG 4. DOSODIC. KAMERUNOSE. Inclusive. Norm. Locality. Analyst. Reference. Author’s name \ or 12.2 di 27.8 Gordon’s Butte, E. A. Schneider. J. E. Wolff, Theralite. an 16.4 ol 4.5 lc 7.0 lilt 6.7 Crazy Mountains, B. U. S. G. S., 150, ne 20.4 Montana. p. 201, 1898. or 11.7 di 25.3 Monchique, Serra de Singhof. K.-Koschlau and Hack- Basic segrega- an 14.7 mt 8.8 Monehique, - mann, T. M. P. M., tionin nephe ne 18.7 il 8.0 Portugal. XVI, p. 237, 1896. lite-syenite. ap 1.2 or 20.6 di 24.4 Heum, V. Schmelck. W. C. Brogger, Heumite. ab 8. y ol 4. / ail 5.8 mt 6.7 Laugendal, Eg. Kg., Ill, ne 24.4 il 3.4 Norway. p. 91, 1898. ap 1.0 or 13.3 di 29.5 Kjose Aklungen, O. Heidenreich. W. C. Brogger, Farrisite. ab o. 8 ol o. 4 an 8.1 mt 5.3 Laugendal, Pig. Kg., Ill, ne 26.7 il 3.2 Norway. p. 65, 1898. or 15.0 di 18. 7 Kiechlingsberg, K. Grass. K. Grass, Monchiquite. ab 4.2 wo 14. 7 an 10.3 mt 7.4 Kaiserstuhl, Mt. Bad. G. L-A., ne 19.0 il 5.9 Baden. IV, p. 113, 1900. ap 0.7 4 or 5.6 di 30.4 Lobauer Berg, J. Stock. J. Stock, Nephelite- an 14. 5 ol 2. 6 lc 5.2 mt 6.3 Saxony. T. M. P. M., IX, dolerite. ne 21.6 il 2.0 p. 466, 1888. hm 4.3 ap 5.3 or 10.6 di 47.1 Poutelitschorr, H. Berghell. V. Hackman, Augite- ab 7.3 wo 6.1 an 5.0 mt 4.6 Umptek, Kola, Fennia, XI, No. 2, porphyrite. ne 19.3 il 1.4 Finland. p. 193, 1894. or 10.0 di 39.3 Kunjokthal, Kola. F. Eichleiter. F. Eichleiter, Theralite. ab 6.8 ol 3.4 an 11.7 mt 5.3 Finland. Vh. G. R.-A. Wien, ne 19.0 il 5.5 XXVII, p. 217, 1893. - or 12.8 di 24.9 Etinde Volcano, M. Dittrich. E. Esch, Leucite- an 10.6 wo 2.7 lc 5.2 il 4.0 Kamerun, Africa. Sb. Berl. Akad., nephelinite. ne 21.9 hm 10.1 1901, p. 299. pf 2.7 ap 2.0 X 0.20 or 10.0 di 20.7 Etinde Volcano, M. Dittrich. E. Esch, Leucite- SO3 U. 06 Cl 0.14 an 13.6 wo 2.5 lc 8.7 il 6.5 Kamerun, Africa. Sb. Berl. Akad., nephelinite. ne 23.6 hm 7.4 1901, p. 299. ap 1.9 S0 3 2.17 Q 3.3 di 24.2 Etinde Volcano, M. Dittrich. E. Esch, Hauynophyr. Cl 0.48 or 8.9 wo 1.4 an 16.4 mt 3. 9 Kamerun, Africa. Sb. Berl. Akad., so 6.9 il 6.9 1901, p. 299. no 18.2 hm 4.6 ap 2.0 SUBRANG 2. DOPOTASSIC. an 22.0 di 6.9 lc 14.0 ol 18.6 ne 4.5 am 12.5 mt 12.1 il 0.8 ap 2.3 Near Hot Springs, Arkansas. L. G. Eakins. J. F. Kemp, A. R. Ark. G. S., 1890, p. 399, 1891. Ouachitite. Remarks. Sum low. Prop¬ erly in malig- nose, if Ti0 2 were deter¬ mined. Near malignose. Sum high. Sum high. Also in V. Hack- man, Fennia, XI, No. 2, p. 168, 1894. Not fresh. 350 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS III. SALFEMANE—Continued. RANG 3. ALKALICALCIC. ETINDASE. No. Si0 2 A1A Fe 2 0 3 FeO MgO CaO Na.,0 A K 2 0 H,0+ h 2 0 - co 2 Ti0 2 . FA MnO BaO Sum Sp. gr. 1 42. 51 12. 85 2. 67 7. 52 12 . 00 11.83 2. 75 2.15 2. 96 3. 46 0. 83 100. 53 2. 905 A3. Ill .709 .126 .017 .104 .300 '.210 .044 .023 .012 2 43.18 12.66 3. 66 8.69 13. 74 12. 51 3.19 1.22 1.42 0 . 88 101.15 2. 99 B2. Ill .720 .124 .023 .121 .344 .223 .051 .013 .006 3 41. 67 11.39 4. 81 9. 72 12.37 11.23 3. 57 1.06 2 . 57 1.39 99. 78 2.42 A3. Ill .695 .112 .030 .136 .309 .200 . 058 .011 .010 4 41.68 17.98 5.40 8 . 42 7.40 11.84 4. 28 2.07 1.09 1.21 trace 101.37 3. 015 C2. IV .695 .176 .034 .117 .185 .211 .069 .022 . 015 — 5 39. 33 15. 26 6 . 36 5. 99 9. 78 14.52 3. 47 1.53 2. 54 0.12 1.01 0. 93 100.84 3. 082 B2. Ill . 656 .150 .040 .083 .245 .259 .056 .016 .012 .006 6 39. 37 16. 50 2 . 28 7.97 4.48 10 . 22 4. 73 3. 38 4. 77 0. 64 3.31 0.13 0 . 06 100. 07 2 . 82 Al. I . 656 .162 .014 .in .112 .164 .076 .036 .041 .001 .001 RANG 3. ALKALICALCIC. ETINDASE. 1 40. 73 20. 70 4. 26 8 . 38 5.32 10. 78 7. 28 0 . 60 2 . 00 trace 0. 46 0. 49 trace 101.00 3.141 B2. Ill .679 .203 .027 .117 .133 .193 .118 .006 — .006 .003 — CLASS III. SALFEMANE. RANG 1. PERALKALIC. CHOTASE. 1 46. 51 11.86 7. 59 4. 39 \ 70 4. /o 7.41 2. 39 8 71 2.45 1.10 none 0. 83 0 . 80 0 . 22 0.50 99. 78 Al. I . 775 .115 .047 .061 .118 .132 .038 .092 .010 .006 .003 .003 RANG 2. DOMALKALIC. ALBANASE. 1 45.99 17.12 4.17 5.38 5. 30 10. 47 2 . 18 8 . 97 0. 45 0. 37 trace 0. 25 100.65 A2. II . 767 .168 .026 .075 .133 .187 .035 .095 .005 — .002 RANG 2. DOMALKALIC. ALBANASE. 36. 36 11.67 6 . 62 5. 36 13. 58 9. 48 3. 59 3. 74 6 . 18 trace 99.61 3. 078 .606 .115 .041 .075 .340 .169 .058 .039 - .077 t A2. II SALFEMANE-SR 3 OF ALBANASE. 351 ORDER 7. LENFELIC. KAMERUNARE—Continued. SUBRANG 4. DOSODIC. ETINDOSE. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. an 16.4 lc 10.0 ne 12.5 di 31.3 ol 18.8 am > 1.2 nit '3.9 Grainbank, Kirkwall, Orkney Islands. J. S. Flett. J. S. Flett, Tr. R. Soc. Edinb., XXXIX, p. 891,1900. 31onchiquite. Not fresh. or 2.8 an 16.7 lc 3.5 ne 14.5 di 32.0 ol 23.1 mt 5.3 ap 2.0 Ibrakuppe, Oberaula, Hesse. ✓ H. Wolff. LI. AVolff, cf. N. J., 1891, II, p. 279. Nephelite- basalt. Sum high. or 6.1 ab 4.2 an 12.0 ne 14.2 di 27.7 ol 22.8 mt 7.0 ap 3.3 Dohnberg, Oberaula, Hesse. H. Wolff. H. Wolff, cf. X. J., 1891, II, p. 279. Nephelite- basalt. Nearly in dofe- mane. an 23.6 lc 9.6 ne 19.6 di 23.2 ol 11.6 am 2.5 mt 7.9 il 2.3 Paudler’s Berg, Giintersdorf, Bohemia. R, Pfohl. J. E. Hibsch, T. 31. P. 31., XV, p. 247, 1896. Basalt. Sum high. an 21.7 lc 7.0 ne 15.9 di 18.6 ol 14.1 am 7. 7 mt 9.3 il 1.8 ap 2.0 Grosswohlen, Bohemia. R. Pfohl. J. E. Hibsch, T. 31. P. 31., XVII, p. 49, 1897. Nephelite- basalt. S0 3 2.14 Cl 0.09 or 12.2 an 21.4 lc 6.1 no 18.0 di 19.7 ol 6.6 mt 3.2 il 6.3 Etinde Volcano, Kamerun, Africa. 31. Dittrich. E. Esch, Sb. Berl. Akad., 1901, p. 299. Hauynophyre. SUBRANG 5. PRESODIC. Cl trace S trace NiO trace an 21.9 di 23.9 lc 2.6 ol 9.6 ne 33.5 mt 6.3 il 0.9 ap 1.1 Volkersberg, n. Briickenau, . Rhbngebirge. 0 H. Lenk. H. Lenk, Vh. Ph. Ges. Wurzb., XXI, p. 76, 1887. Nepholite- basalt. Sum high. ALOg high? Alkalies? ORDER 8. FELDOLENIC. BOHE31ARE. SUBRANG 2. DOPOTASSIC. CHOTOSE. S0 3 0.05 Cl 0.04 F trace Cr»0 3 none Ni'O 0.04 SrO 0.16 or 7.8 ac 6.9 lc 34.0 di 25.1 ne 10.8 ol 2.5 mt 7.4 il 1.5 ap 1.9 Bearpaw Peak, Bearpaw 3Iountains, Choteau County, 3Iontana. LI. N. Stokes. Weed and Pirsson, A. ,T. S., II, p. 147, 1896. *. Leucitite. Contains traces ofCoO, CuO, and Li 2 0. Complete in B, U.S.G.S.,148. p. 157, 1897. SUBRANG 2. DOPOTASSIC. ALBANOSE. SrO none an 10. 6 di 12.0 lc 41.4 ol 9.7 ne 9.9 am 9.7 mt 6.0 il 0.8 Capo di Bove, Alban Hills, Italy. Id. S. Washing¬ ton. H. S. Washington, A. J. S., IX, p. 53, 1900. Leucitite. Near vesuvose. SUBRANG 3. SODIPOTASSIC. § Cr,0 3 2.93 an 5.0 di 5.3 lc 17.0 ol 22.1 ne 16.5 an 10.2 il 8.6 cm 4.3 hm 6. 6 pf 2.6 Neuhbwen, Hegau, Baden. U. Gruben- mann. U. Grubenmann, In. Diss. Zurich, 1886, p. 28. 3Ielilite-basalt. Dried before analysis. Ignition —2.01 . 9 352 CHEMICAL ANALYSES OF IGNEOUS ROCKS. ('LASS III. SALFEMANE—Continued. KANG 2. DOMALKALIC. ALBANASE. No. SiO, A1A Fe,0 3 FeO MgO CaO Na,0 k 2 o h 2 o+ H,0 co 2 TiG 2 PA MnO BaO Sum Sp. gr. 1 41.75 17.04 6 . 35 3.41 4. 71 14. 57 6.17 3. 98 0 . 62 0 . 28 none 0. 58 1. 09 trace none 100 . 60 3.084 Al. I .696 .167 .040 .047 .118’ .260 .098 .042 .007 .008 — — 26° 2 38. 93 15. 41 5.10 4. 24 5.57 16. 49 5.27 1.78 5.20 1.62 0. 35 trace 100. 57 Al. I .649 .151 .032 .059 .139 .294 .085 .019 .020 .002 , — 3 43.18 15. 24 7.61 2. 67 5. 81 10. 63 5. 68 4. 07 3. 57 99.40 2. 93 B3. IV .720 .149 .048 .038 .145 .189 .092 .043 4 42. 68 17.90 2. 45 7.22 8 . 48 9. 78 5.91 3.63 3. 02 - 101.07 2.81 B3. IV .711 . 175 .015 .100 .212 .175 .095 .038 5 40.15 17. 32 7. 25 4.00 4. 43 11. 78 5. 99 3. 78 1.18 0.15 3.21 0.71 0 . 08 100. 38 3.01 Al. I .669 .170 .045 . 056’ .in .210 .097 .040 .040 .005 .001 6 38.39 12. 64 7.40 6.15 6 . 46 14. 17 4. 35 2. 44 1.62 0. 23 4. 44 1 . 16 100. 31 3. 10 Al. I .640 .124 .046 .086 .162 .253 .070 .026 . 056 .008 7 39. 64 16. 98 6 . 61 9.31 6 . 65 10. 58 5.95 3. 09 1.32 100.13 A3. Ill .661 .166 .041 .129 . 166 .189 .096 .033 RANG 2. DOMALKALIC. ALBANASE. 46.15 13. 25 1.29 8 . 54 7. 82 13. 89 5. 77 0. 93 2.01 trace 0.36 0.15 0 . 22 100. 37 .769 .130 .008 .119 .196 .248 .093 .010 .004 .001 .003 CLASS III. SALFEMANE. RANG 1. PERALKALIC. IJOLASE. 1 42. 65 9.14 5.13 1.07 10. 89 12. 36 0. 90 7. 99 2.18 2.04 1. 64 1.52 0.12 0. 89 loo. n 2. 857 0 . 20 Al. 1 .711 .090 .032 .017 .272 .220 .014 .085 .020 .011 .002 .006 99.91 22° RANG 1. PERALKALIC. IJOLASE. 1 43.70 { 19.77 3. 35 3.47 3. 94 10. 30 9. 78 2. 87 0. 89 0. 89 1.34 trace 100. 30 A2. II .728 1 .195 .021 .049 .099 .184 .158 .030 .011 . 009 — 2 43.50 14.60 5.40 8 . 28 6.16 8 . 70 7. 34 2. 95 2.50 0.10 trace 99. 90 2. 94 A2. II .725 .143 .034 .115 .154 . 155 .118 .032 .001 RANG 1. PERALKALIC. IJOLASE. 42. 07 18.68 1 . 68 4. 39 3. 53 10. 83 11.00 1.87 1.20 0 . 60 1.00 2.44 99. 66 • .701 .185 .011 .061 .088 .193 .177 .020 .012 .017 A2. It SALFEMANE-LTOLOSE. 353 ORDER 8. FELDOLENIC. BOII EM ARE—Continued. SUBRANG 4. DOSODIC. COVOSE. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. ZrOo s 0.05 none an 7.5 lc 18.3 ne 27.8 di 12.6 wo 10. 3 ol 4.2 am 6.1 mt 9.3 il 0.8 ap 2.6 Below Dr.Thornton’s, Magnet Cove, Arkansas. H. S. Washing¬ ton. H. S. Washington, B. G. S. A., XI, p. 399, 1900. Ijolite. Complete in J. G. IX, p. 618, 1901. Cl FeS.. SrO' Li 2 0 0.02 0.89 trace trace an 13.1 lc 8 .3 ne 24.1 di 6.8 wo 11.8 ol 8.4 am 11.2 mt 7.4 jl 3.1 ap 0.8 Baptist Church, Magnet Cove, Arkansas. J. F. Williams. J. F. Williams, A. R. Ark. G. S. 1890. II, p. 226, 1891. Nephelite- syenite (Cove type). Biotite-ijolite, H. S. IV., B. G. S. A., XI, p. 400, 1900. so 3 Cl 0.94 none or 7.8 an 7.2 lc 12.6 ne 15.9 no 8.4 di 31.4 wo 2.1 mt 8.8 hm 1.6 Martinsdale, Crazy Mountains, Montana. Not stated. J. E. Wolff, N. Transc. Surv., p. 10, 1885. Theralite. (Rosen- busch.) an 11.7 lc 16.6 ne 27.0 di 11.0 ol 19.6 am 8.5 mt 3.5 Kronberg, Schorbach, Hesse. II. Wolff. H. Wolff, Cf. N. V. 1891, II, p. 279. Nephelite- basanite. Sum high. Zr0 2 0.35 an 9.2 lc 17.4 ne 27.5 di 18.0 wo 5.7 ol 1.9 am 2.8 mt 3.7 il 6.2 hm 4.6 ap 1.7 Etinde Volcano, Kamerun, Africa. M. Dittrich. E. Esch, Sb. Berl. Akad., 1901, p. 415. Nephelinite. so 3 Cl 0.47 0.37 an 10.8 lc 11.3 ne 9.1 so 4.9 no 4.1 di 32.4 wo 2.9 ol 0.9 am 1.2 mt 7.0 il 8.6 hm 2. 5 ap 2.6 Etinde Volcano, Kamerun, Africa. M. Dittrich. E. Esch, Sb. Berl. Akad., 1901, p. 299. Nephelinite. an 10.3 lc 14.4 ne 27.3 di 4.1 ol 19.9 am 14.5 mt 9.5 Praya, Cape Verde Islands. F. Kertscher. F. Eigel, T. M. P. M., XI, p. 98, 1890. Teschenite. SUBRANG 5. PERSODIC. S trace or 1.1 an 7.5 lc 3.5 ne 26.4 di 49.9 ol 7.2 mt 1.9 Grenada, West Indies. J. B. Harrison. J. B. Harrison, Rocks of Grenada, London, 1896, p. 10. Augite-andesite with olivine. Analysis does not correspond with descrip¬ tion. ORDER 9. PERLENIC. FINNARE. SUBRANG 2. DOPOTASSIC. MADUPOSE. so 3 Cl F Cr 2 0 3 C&jOa SrO 0.58 0.03 0.47 0.07 0.11 0.33 lc 37.1 no 3.5 di 22.6 ol 11.7 am 8.2 il 2.7 hm 5.1 ap 3.7 ft 0.7 Pilot Butte, Leucite Hills, W voming. W. F. Hille- brand. W. Cross, A. J. S., IV, p. 130, 1897. Madupite. SUBRANG 4. DOSODIC. IIVAAROSE. 1 or 4.4 an 1.9 lc 9.6 ne 44.9 di 25.6 wo 3.7 mt 4.9 il 1.7 ap 3.0 Iivaara, Kuuosamo, Finland. N. Sahlbom. V. Hackman, B. C. G. Finl., No. 11, p. 17, 1900. Ijolite. Cl Cr 2 0 3 0.37 trace or 3.3 lc H.3 ne 27.8 so 5.0 ac 0.9 di 35.3 ol 6.7 mt 7.4 Bondi, New South Wales. J. M. Curran. J. 51. Curran, Proc. R. Sue. X. S. W., XXVIII, p. 225,1894. Basalt. Na 2 0 high. cf. G. W. Card Rec. G. S. N, S. W.,VII.Pt. 2, p. 95, 1902. SUBRANG 5. PERSODIC. IJOLOSE. lc 8.7 ne 46.9 ac 5.1 di 23.0 ol 3.1 am 3.6 il 1.8 ap 5.6 Iiwaara, Kuuosamo, Finland. N. Sahlbom. V. Hackman, B. C. G. Finl., No. 11, p. 17, 1900. Ijolite. 14-128—No. 14—03 23 354 CHEMICAL ANALYSES OF IGNEOUS ROCKS. CLASS IV. DOFEMANE. SUBCLASS I. P + O + M EXTREME OVER A. RANG 1. PERMIRLIO. MINNESOTASE. SECTION 1. PERMIRIC. MINNESOTIASE. No. Si0 2 A1A Fe 2 0 3 FeO MgO CaO Na 2 0 K 2 0 h 2 0 + H 2 0- C0. 2 Ti0 2 PA MnO BaO Sum Sp. gr. 1 50.04 7. 93 1.41 14. 82 18.58 3.41 0. 90 0.21 0. 87 0 . 82 0. 27 0.10 100.13 A2. II .844 .077 .009 .206 .465 .061 .013 .002 .010 .002 .002 2 40. 90 14.13 0. 70 14. 95 15. 97 2.32 0. 35 1.08 1.20 0. 07 0 . 02 0. 03 0. 93 100. 09 3.193 Al. I .783 .138 . 005 .208 .400 .041 .006 .018 .007 — .013 3 51. 83 7. 98 1.48 8 . 28 24.10 5. 20 0. 35 0 . 00 0. 29 0. 29 0 . 09 trace 100. 43 Al. I .864 .078 .009 .115 .603 .094 .006 .001 .004 .001 — 4 53. 05 8.91 3.20 9.52 14. 42 0. 70 0 . 00 0. 48 0. 05 1.77 0. 09 0.08 99. 05 3. 09 A2. II .884 .087 .020 . 133 .361 .121 .011 .005 .022 . 001 .001 CLASS IV. DOFEMANE. RANG 1. PERMIRLIC. SECTION 2. DOMIRIC. 1 Al. 1 48. 03 .811 5.32 . 052 2.91 .018 3.90 .054 21. 79 . 545 13. 04 .233 0. 34 .005 0. 23 .002 2 . 81 trace .006 0.47 .002 0 . 21 .002 0.12 trace 100.13 RANG 1. PERMIRLIC. SECTION 2 . DOMIRIC. 1 48.91 8 . 81 1.04 9. 52 15.19 14.09 0. 04 0.10 0.52 0.07 0. 37 trace 0.16 100.17 Al. I .815 .086 .007 .133 .380 .262 .010 .001 .005 — .002 2 40. 00 10 . 01 3.17 5. 01 14. 74 10.55 1.31 5.14 1.44 0.73 0 . 21 trace 0. 32 99.57 Al. I .768 .098 .020 . 078 .369 .188 .021 .055 .009 .002 — .002 3 42. 83 10. 92 4. 33 8 . 82 14. 02 13. 20 3. 24 0. 04 1.80 none 0.05 0. 39 0.12 100. 36 A2. II .714 .107 .027 . 122 .351 .235 .052 .007 .001 .003 .002 4 42.00 12.18 2. 07 7.89 11.47 11. 29 5. 10 1.07 3. 08 1.93 0.34 100.05 2. 968 Al. I .701 .119 .017 .110 . 287 .201 .082 .012 .024 .002 CLASS IV. DOFEMANE. RANG 1. PERMIRLIC. WEHRLASE. SECTION 1. PERMIRIC. WEHRLIASE. 1 B3. IV 43. 70 .728 11.20 .110 3. 90 .024 6.15 .086 25. 60 .640 7.07 .127 0. 52 .008 0.31 .003 2 . 80 101.25 RANG 1. PERMIRLIC. WEHRLASE. SECTION 1. PERMIRIC. WEHRLIASE. 1 48. 95 5.69 1.20 12.11 23. 49 5. 33 1.58 0. 79 0.18 0 . 81 0.12 0 . 08 trace 100. 54 3. 37 Al. I .816 .055 .007 .168 . 587 .094 .026 .009 .010 .001 .001 — 9 46.13 4. 69 0. 73 16. 87 25. 17 4. 41 0 . 08 trace 1. 38 0. 73 0. 07 trace trace 100. 63 3. 35 Al. I .769 .046 .004 . 234 .629 .078 .001 — .009 — — — 3 46.0 6.8 3.0 7. 5 23.9 8 . 1 0.8 0.9 2.4 99.6 3.15 A3. Ill .767 .067 .019 .104 .598 .144 .013 .010 4 42. 87 10.93 3. 44 10.14 16. 27 9. 11 0.92 0. 13 2. 87 0. 57 2. 70 trace trace trace 99. 95 2 . 88 A3. Ill . 715 .107 .021 .140 .407 .161 .014 .001 — SALFEMANE-WEHRLOS E. 355 ORDER 1. PERPOLIC. IIUNGARARE. SECTION E PERPYRIC. MINNESOTIARE. SUBRANG 2. DOMAGNESIC. COOKOSE. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. Cr 2 0 3 0.05 or 1.1 hy 66.5 New Braintree, L. G. Eakins. P>. K. Emerson, Wehrlite. ab 6.8 ol 3.4 an 17.2 mt 2.1 Massachusetts. B. U. S. G. S., 148, il 1.5 p. 77, 1897. Cr 2 0 3 trace or 10.0 hy 57.5 Gunflint Lake, H. N. Stokes. W. S. Bayley, Hypersthene- N iO 0.06 ab 3.1 oi 6.0 an 11.4 mt 1.2 Cook County, J.G., III, p. 10, 1895. gabbro. C 7.5 il 1.1 Minnesota. Cr 2 0 3 0. 31 or 0.5 di 5.1 Meadow and Granite L. G. Eakins. G. P. Merrill, Pyroxenite. Igneous? NiO 0.11 ab 3.1 hy 61.1 creeks, Madison Pr. U. S. Nat. Mus., mt 2.1 County, Montana. XVII, p. 658, 1895. Q 8.6 di 11.1 Eriyur, South Arc.ot, P. Briihl. T. H. Holland, Augite-norite. Nearly in sal- or 2.8 hy 42.8 ab 5.8 mt 4.6 India. Rec. G. S. lnd., XXX, femane. an 19.7 il 3.4 p. 28, 1897. ORDER 1. PERPOLIC. HUNGARARE. SECTION 2. DOPYRIC. SUBRANG 1. PERMAGNESIC. BELCHEROSE. Cr 2 0 3 0.36 or 1.1 di 41.7 Belchertown, L. G. Eakins. B. K. Emerson, Cortlandite. ab 2.6 hy 21.9 an 12 .5 ol 11.7 Massachusetts. M. U. S. G. S., XXIX, mt 5.1 p. 347, 1898. SUBRANG 2. DOMAGNESIC. CO oo OhJ 0.15 trace ab 5.2 di 42.0 an 21.1 hy 16.2 ol 12.3 mt 1.6 il 0.8 Orange Grove, Baltimore County, Maryland. W. F. Hille- brand. G. H. Wiliams, 15 A. R. U. S. G. S., p. 674, 1895. Olivine-gabbro. so 3 Cl SrO 0.05 0.03 0.20 or 1.1 di 37.4 an 6.1 ol 17.7 lc 23.1 mt 4.6 ne 6.0 il 1.2 Shonkin Creek, Highwood Moun¬ tains. Montana. E. B. Hurl but. Weed and Pirsson, A. J. S., II. p. 321, 1896. Missourite. Near albanose. s trace an 13.3 di 41.7 lc 3.1 ol 20.0 ne 14.8 mt 6.3 Grenada, West Indies. J. B. Llarrison. J. B. Harrison, Rocks of Grenada, London, 1896, p. 10. Olivine-basalt. Dried at 100°. X s 0.88 0.09 an 7.0 di 38.3 lc 5.2 ol 13.9 ne 23.3 am 0.5 mt 3.9 il 3.7 Hahn, Habichtswald, Cassel, Hesse- Nassau. P. Jannasch. F. Rinne, Sb. Berl. Akad., 1889, p. 1026. Limburgite. ORDER 1. PERPOLIC. HUNGARARE. SECTION 3. PYROLIC. HUNGARIARE. SUBRANG 1. PERMAGNESIC. or 1.7 di 6.2 ab 4.2 hy 15.6 an 27.5 ol 37. 3 mt 5.6 Etang de PEstagnet, Pyrenees, France. A. Pisani. ,A. Lacroix, B. S. C. G. Fr., XI, No. 71, p. 31,1900. Peridotite. Sum high. SUBRANG 2. DOMAGNESIC. WEHRLOSE. Cr 2 C >3 NiO 0.05 0.16 or 5.0 di 16.5 ab 13.6 hy 18.5 an 5.6 ol 37.6 mt 1.6 il 1.5 Red Bluff, Montana. L. G. Eakins. G. P. Merrill, Pr. U. S. Nat. Mus., XVII, p. 652, 1895. W ehrlite. s Cr 2 0 3 NiO 0.24 0.04 0.09 ab 0,5 k di 7. 6 an 12.5i ay 44.8 ol 30.4 mt 0.9 il 1.2 North Meadow Creek, Montana. L. G. Eakins. G. P. Merrill, Pr. U. S. Nat. Mus., XVII, p. 655,1895. Hornblende- picrite. Nearly in per- femane. Cr 2 0 3 0.2 or 5.6 di 22.0 ab 6.8 hy 10.3 an 12.2 ol 35. 7 mt 4.4 Loch Garabal, Scotland. J. H. Player. Dakyns and Teall, Q. J. G. S., XLVIII, p. 115, 1892. Peridotite? or 0.6 di 15.4 ab 7.3 hy 16.0 an 25.6 ol 24.1 mt 4.9 Ty Croes, Anglesey, Wales. J. A. Phillips. T. G. Bonney, Q. J. G. S., XXXIX, p. 254, 1883. Hornblende- picrite. Not fresh. 356 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS IV. DOFEMANE—Continued. RANG 1. J’ERMIRLIC. WEHRLASE. SECTION 2, DOMIRIC. No. Si0 2 A1A Fe,0 3 FeO MgO CaO Na 2 0 K 2 0 h 2 o+ H 2 0- N o o Ti0 2 PA MnO BaO Sum Sp. gr. | 1 44.99 5.91 3. 42 8.30 21.02 8 . 79 0. 91 0. 74 3.19 0. 63 trace 0. 97 0. 05 trace 99.17 Bl. II .750 .058 .021 .115 .526 .157 .014 .008 .012 — — 9 50. 44 8.18 1.06 6 . 29 17.63 11.55 2. 98 0.50 0.92 0. 07 0.21 100. 31 A2. II .841 .080 .007 .088 .441 .206 .048 .006 .003 3 47. 75 10. 56 0. 74 8 . 34 19. 09 9. 62 1.32 0.12 2 . 06 0. 05 0.37 0.'03 0.10 none 100. 46 Al. I .796 .104 .004 .115 .477 .171 .021 .001 .005 — .001 — 4 48. 29 10.00 2. 93 5. 46 17. 22 11 . 80 2. 78 0. 45 1.95 100.88 A3. Ill .805 .098 .018 .076 .431 .210 .045 .005 • 5 48.15 9.52 2. 98 5. 46 17.42 11.91 2. 34 0. 40 2 . 35 100. 53 A3. Ill .803 .093 .019 .076 .436 .212 .038 .004 CLASS IV. DOFEMANE. RANG 1. PERMIRLIC. CORTLANDTASE. SECTION 1. PERMIRIC. CORTLANDTIASE. 1 Al. I 39. 20 .653 4. 60 .1)45 3.45 .022 6.15 .086 31. 65 .791 3. 23 . 057 0. 42 .006 0.14 .001 9.38 0.50 0.52 .006 trace 0 . 20 .003 100.15 RANG 1. PERMIRLIC. CORTLANDTASE. SECTION 1. PERMIRIC. CORTLANDTIASE. 1 A3. Ill 46. 03 .767 9. 27 .091 2. 72 .017 9. 94 .139 25. 04 .626 3. 53 .062 1.48 .024 0. 87 .009 0. 64 0.17 .001 0. 40 .006 100. 09 • • RANG 1. PERMIRLIC. CORTLANDTASE. SECTION 2. DOMIRIC. 1 40. 31 12.24 5. 77 10. 92 S. 10 12.12 7.52 1.08 0. 29 trace 0. 89 0. 45 trace 100. 69 3.114 A2. II .672 .120 .036 .151 .227 .216 .121 .012 .011 .003 4° CLASS IV. DOFEMANE. RANG 1. PERMIRLIC. LHERZASE. SECTION 1. PERMIRIC. LHERZIASE. 1 A3. Ill 41.50 .692 6 . 93 .068 2.19 .014 6.69 .093 35.90 .898 5.80 .103 1 1.37 .022 0.30 .003 0. 32 trace 101.00 RANG 1. PERMIRLIC. LHERZASE. SECTION 1. PERMIRIC. LHERZIASE. 1 39. 25 5.39 2 . 60 8 . 90 33. 72 4. 55 1 . 18 0 . 60 2. 83 0. 77 99. 79 A3. Ill . 654 .053 .016 .124 .843 .081 .019 .006 .010 • RANG 1. PERMIRLIC. LHERZASE. SECTION 3. CALCIMIRIC. YENANZIA3E. 1 41.43 9.80 3. 28 5.15 13. 40 16. 62 1.64 7.40 1.11 0.29 none 100.12 2. 758 A2. II .691 .0% .021 .072 .335 .2% .026 .079 .004 — DOFEMANE-VENANZOSE. 357 ORDER 1. PERPOLIC. HUNGARARE. SECTION 3. PYROLIC. HUNGARIARE—Continued. SUBRANG 2. DOMAGNESIC. ROSSWEINOSE. Inclusive. Norm. Locality. Analyst. Reference. Cr..0 8 0.25 or 4.4 di 26.8 Crystal Falls, H. N. Stokes. J. M. Clements, Nib none ab 7.3 hy 12.8 an 10.0 ol 26.9 Michigan. J. G., VI, lilt 4.9 p. 386, 1898. il 1.8 Cr 2 0 8 0.48 or 3.3 di 40.2 Knoxville, California. W. H. Melville. G. F. Becker, ab 16.8 ol 25.3 M. U. S. G. S., XIII, ne 4.0 p. 101, 1888. Cr.O, 0.24 or 0.6 di 19.8 Cathav Hill, W. F. Hille- H. W. Turner, NiO 0.07 SrO trace ab 11.0 hv 16.3 an 22.8 ol 25.8 Mariposa County, brand. 17 A. R. U.S.G.S.,I., LioO trace mt 0.9 California. p. 694, 1896. il 0.8 or 2.8 di 35.7 Etzdorf, Rosswein, Sachsse and Sachsse and Becker. Cf. ab 13.1 ol 24.1 an 13.3 mt 4.2 Saxony. Becker. N. J., 1893, II, p. 503. ne 5.7 or 2.2 di 35.4 Etzdorf, Rosswein, Sachsse and Sachsse and Becker. Cf. ab 14.7 ol 24.5 an 14.2 mt 4.4 Saxony. Becker. N. J., 1893, II, p. 503. ne 2.8 Author’s name. Remarks Peridotite. Pseudo-diorite. Diabase? Gabbro. Gabbro. Also in M. r. S.G.S., XXXVI, p. 259,1899. ORDER 1. PERPOLIC. HUNGARARE. SECTION 4. DOMOLIC. SUBRANG 1. PERMAGNESIC. CORTLANDTOSE. Cr„0 3 0.41 Ni'O 0 . 30 LioO trace or 0.6 di 4.4 ab 3.1 hy 16.8 an 10.6 ol 47. 9 mt 5.1 il 0.9 Ilchester, Howard County, Maryland. W. F. Hille- brand. G. H. Williams, 15 A. R. U. S. G. S., p. 674, 1895. Cortlandtite. Not fresh. SUBRANG 2. DOMAGNESIC. CUSTEROSE. or 5.0 hy 16.7 ab 12.6 ol 44.3 an 16.1 mt 3.9 ap 0.4 Cottonwood Gulch, Silver Cliff, Custer County, Colorado. I . G. Eakins. W. Cross, Pr. Colo. Sci. Soc., Il, p. 245, 1887. Peridotite. Also in 17 A. R. U. S. G. S., II, p. 284, 1896. SUBRANG 3. M AGNESI FERROUS. Cl trace S trace Cr 2 0 3 trace lc 5.2 nc 6.0 ne 30.7 di 6.8 ol 26.0 am 17. 7 mt 5.3 il 1.7 ap 1.1 Dreistelz, Jthbnge- birge. H. Lenk. H. Lenk, Vh. Ph. Ges. Wurzb., XXI, p. 60, 1887. Nephelite- basalt. ORDER 1. PERPOLIC. HUNGARARE. SECTION 5. PEROLIC. PYRENIARE. SUBRANG 3. PERMAGNESIC. LHERZOSE. Cr 2 0 3 trace an 12.0 di 4.3 lc 1.3 ol 69.3 ne 6.2 am 4.0 mt 3.2 Caussou, Pyrenees. Brunet. A. Lacroix, cf. N. J., 1895, II, p. 267. Lherzolite. Sum high. SUBRANG 2. DOMAGNESIC. ARGEINOSE. an 7.8 di 7.3 lc 2.6 ol 66.6 ne 5.4 am 1.9 mt 3.7 il 1.5 Argein, Pyrenees. A. Pisani. A. Lacroix, C. R., VIII. Cong. G. Int., p. 833, 1901. Ilornblende- peridotite. SUBRANG 2. DOMAGNESIC. VENANZOSE. ■ kp 25.0 ac 4.2 ne 4.8 ol 32.3 am 29.8 mt 2.8 il 0.6 San Venanzo, Umbria, Italy. H. Rosen busch. H. Rosenbusch, Sb. Berl. Akad. 1899, p. 113. Euktolite. (Venanzite.) Cf. A. J. S.,VII, p. 399, 1899. 358 CHEMICAL ANALYSES OF IGNEOUS ROCKS CLASS IV. DOFEMANE—Continued. RANG 1. PERMIRLIC. SECTION 2. DOMIRIC. No. Si0 2 ALA FeA FeO MgO CaO Na 2 0 k 2 o h 2 o+ h 2 o- co 2 Ti0 2 PA MnO BaO Sum Sp. gr. 1 A3. Ill 40.2 .670 9.5 .093 9.7 .060 12.2 .170 8.0 .200 13.1 .234 0.8 .013 0.2 .002 0.5 4.7 .059 0. 40 .006 99. 7 3. 36 RANG 1. PERMIRLIC./ SECTION 3. CALCIMIRIC. BRANDBERGIASE. 1 43.17 9. 93 8. 78 6. 88 6. 80 20. 96 1.77 0. 16 A3. Ill .720 .097 . 055 .096 .170 .374 .029 .002 2 45. 05 6. 50 3. 83 7.69 12.07 18.82 0.94 0. 78 A3. Ill . 751 .064 .024 .107 .302 .336 .015 .009 3 39. 43 10. 36 13.19 3. 98 5. 53 15. 50 4.23 2. 24 A2. II .657 . 102 .082 .056 .138 .277 .068 .023 0. 31 1.56 100. 30 3. 28 .019 2.40 2. 65 0. 15 100. 88 .033 .001 0.81 2. 27 2. 76 trace 100. 30 3.058 . 028 .020 CLASS IV. DOFEMANE. RANG 1. PERMIRLIC. PAOLASE. SECTION 1. PERMIRIC. VALBONNIASE. 1 A3. Ill 46. 40 *. 773 10. 80 .106 5. 90 .036 5. 60 .078 22.20 . 555 3. 72 .066 0.30 .005 1.21 .013 3. 85 100.18 RANG 1. PERMIRLIC. PAOLASE. SECTION 2. DOMIRIC. 1 47.41 6.39 7.06 4. 80 15.34 14. 32 0. 69 1.40 2.10 100. 00 3.30 B3. IV .790 .063 .044 . 067 .384 .256 .010 .015 15° 2 40. 42 9.98 9.83 10. 67 11.56 10. 78 1.26 0.60 1.17 0. 45 2.51 0. 63 0. 25 0.C5 100. 20 Al. I . 674 .098 .061 .148 .289 .193 .020 .006 .031 .004 .004 — 3 38.20 9.16 6.12 5.89 14. 69 9. 93 3. 44 2. 20 trace 7.27 trace 99. 91 2. 914 A2. II .637 .090 .038 .082 .347 .177 .055 .024 — .091 — 4 42. 68 9. 42 11.55 7. 23 10.09 13.15 2. 71 1. 16 1.06 0.51 1.29 100. 85 A2. II .711 .092 .066 .100 .252 .235 .043 .012 .006 .009 5 38. 08 11.44 7. 18 6. 55 12. 11 13. 08 2. 28 1.24 3. 98 3.15 0. 54 99. 73 3. 071 A2. II . 635 .112 .045 .091 .303 .234 .037 .014 .039 .004 6 39.90 10. 02 12. 88 4. 09 14. 84 13. 28 2. 48 1.77 0. 52 trace 0. 82 trace 100. 60 3.19 A3. Ill .665 .098 .080 .057 .371 .237 .040 .020 — .006 7 43. 76 10. 90 3. 49 9. 82 12. 76 13. 80 2. 21 0.31 1.00 2.32 0.51 0. 32 101. 20 B2. Ill .729 .107 .022 .137 .319 . 246 .035 .003 . 029 .004 .005 DOFEMANE—SR 3 OF SEC. OF PAOLASE. 359 9 ORDER 2. DOPOLIC. SCOTARE. SECTION 1. PERPYRIC. SUBRANG 3. M AGNESI FERROUS. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Q 0.9 di 34.9 or 1.1 hy 10.2 ab 6.8 nit 13.9 an 21. Til 9.1 Drain an Eidhne, Island of Skye, Scotland. .T. II. Player. Geikie and Teall, Q. J. G. S., L., p. 653, 1894. Gabbro, “dark band.” SUBRANG 2. DOMAGNESIC. BRANPBERGOSE. or 1.1 ab 2.6 an 18.3 ne 6.8 di 42.2 WO 13.5 mt 12.8 il 2.9 Burnt Head, Monhegan Island, Maine. E. C. E. Lord. E. C. E. Lord, A. G., XX VI, p. 340, 1900. Gabbro- pyroxenite. an 11.1 lc 3.9 ne 4.3 di 66.6 ol 4.0 mt 5.6 il 6.1 Brandberget, Gran, Norway. L. Schmelck. W. C. Brogger, Q. J. G. S., L., p. 31, 1894. Pyroxenite. or 12.8 ab 1.0 an 3.1 ne 18.7 di 29.9 wo 8.3 mt 6.5 il 4.2 hm 8.6 ap 6.6 Lobauer Berg, Saxony. J. Stock. J. Stock, T.M. P. M., IX, p. 466, 1888. Nephelite- dolerite. Iron oxides? ORDER 2. DOPOLIC. SCOTARE. SECTION 2. DOPYRIC. PAOLIARE. SUBRANG 1. PERMAGNESIC. VALBONNOSE. or 7.2 hy 47.9 Vallee de Valbonne, A. Pisani. A. Lacroix, Micaceous horn- ab 2.6 ol 9.3 an 18.3 mt 8.4 Pyrenees. B. S. C. G. Fr., XI, blendite. C 2.2 No. 71, p. 31, 1900. SUBRANG 2. DOMAGNESIC. S 0.49 or 8.3 di 47.9 ab 5.2 hv 6 . 7 an 10.6 ol 8.6 mt 10.2 NiO 0.02 or 3.3 di 24.2 SrO 0.02 ab 10.5 hv 8.0 Li.,0 trace an 20.0 ol 12.2 mt 13.1 il 4.8 ap 1.3 Cr 2 0 3 3.01 or 7.8 di 30.1 an 3.1 ol 14.5 lc 4 4 il 9.5 ne 15.6 cm 4.4 hm 6.1 Pf 3.7 or 6.7 di 37.1 ab 11.5 ol 8.0 an 10.3 mt 15.3 ne 6.0 il 0.9 ap 3.0 so 3 0.10 an 17.0 di 30.7 lc 6.1 ol 11.9 ne 10.5 am 2.0 mt 10.4 il 6.0 ap 1.2 an 10.6 di 37.2 lc 8.7 ol 11.2 ne 11. 4 am 0.8 mt 13.2 hm 3.7 ap 1.8 or 1.7 di 36.8 ab 7.3 ol 18.5 an 19.2 mt 5.1 ne 6.0 il 4.5 | ap 1.3 • Montrose Point, Cortiandt, New York. W. H. Emerson. G. H. Williams, A. J. S., XXXI, p. 40, 1886. Augite- peridotite. Big Timber Creek, Crazy Mountains, Montana. W. F. Hille- brand. J. E. Wolff, B. U. S. G. S., 148, p. 144, 1897. Olivine-gabbro Howenegg, Hegau, Baden. U. Gruben- mann. U. Grubenmann, In. Diss. Ziirich, 1886, p. 26. Melilite-basalt. Todtenkopfchen, Rhbngebirge. II. Sommerlad. H. Sommerlad, N. J. B. B.,II, p. 155 2 1882. Hornblende- basalt. Schafruhe, Rhbngebirge. Haefcke. H. Proescholdt, Jb. Pr. G. L-A., XIV, p. 12, 1894. Nephelite- basalt. Lobauer Berg, Saxony. .T. Stock. J. Stock, T. M. P. M., IX, p. 433, 1888. Nephelite- basalt. Green Mountain, San Vicente, Cape Verde Islands. C. v. John. C. v. John, Jb. G. R-A., Wien, XLVI, p. 284,1896. Dolerite. Na 2 0 by differ¬ ence. Ignition = 0. 89. In Roth. Sum high. 360 CHEMICAL ANALYSES OF IGNEOUS ROCKS. CLASS IV. DOFEMANE—Continued. RANG 1. PERMIRLIC. PAOLASE. SECTION 3. CALCIMIRIC. PAOLIASE. No. Si0 2 A1A Fe 2 0 3 FeO MgO CaO Na,0 K 2 0 H 2 0-j- H,0— CO, Ti0 2 FA MnO BaO Sum Sp. gr. 1 Bl. II 36.51 .009 8 . 22 .080 8 . 29 .052 3.31 .046 8.19 .205 18. 85 .337 2.10 .034 1.08 .012 1.40 3.11 .039 trace 99. 22 9 Al. I 38. 39 .640 7. 05 .069 9.07 .057 6.17 .086 11.58 .290 19.01 .339 0. 74 .012 0. 75 .008 0.33 0.14 0. 32 4.54 . 057 0 . 82' .006 0.32 .005 trace 99. 89 3 A2. II 38. 38 .640 6.15 . 060 11. 70 .073 8.14 .113 11.47 .287 18. 60 .332 0. 78 .013 0. 13 .001 0. 54 0.18 None. 4.32 .054 0 . 17 .001 0.16 .002 100. 72 4 A2. II 37. 62 .627 9.86 .097 4. 22 .026 5. 94 .082 8 . 41 .210 15. 42 .275 3. 33 .053 2.32 .024 4. 41 3.55 2. 79- . 035 2. 05 .015 --- 100. 84 ' CLASS IV. DOFEMANE. RANG 1. PERMIRLIC. TEXASE. SECTION I. PERMIRIC. MARQUETTIASE. 1 Al. I 39.37 .656 4. 47 .044 4. 96 .031 9.13 .126 26. 53 .663 3. 70 .066 0.50 .008 0 . 26 .003 7.08 0. 87 1.23 0 . 66 .008 0.17 .001 0.12 .002 trace 99. 94 RANG 1. PERMIRLIC. TEXASE. SECTION 2. DOMIRIC. UVALDIASE. 1 42. 66 6 . 26 6 . 89 2. 78 24. 64 8 . 02 2 . 88 6.34 100. 47 A3. Ill .711 .061 .043 .039 .616 .143 .047 RANG 1. PERMIRLIC. TEXASE. SECTION 2. DOMIRlC. UVALDIASE. 1 40. 32 9. 46 4. 75 7.48 18.12 10. 55 2 . 62 1.10 1.25 0. 57 * 2 . 66 0 . 68 0. 25 0 . 06 100. 09 3.148 Al. I .672 .094 .030 .104 .453 .188 .042 .012 .033 .005 .004 i ■ — 19° 2 39. 92 8 . 60 4. 40 8 . 00 20.17 10.68 1.91 1.03 1.45 0. 43 2. 70 0.51 0. 24 0 . 06 100. 45 3. 200 Al. I .665 .084 .027 .ill .504 .191 .030 .011 .034 .004 .003 — 21°. 5 3 38. 87 11.94 4. 02 6.00 15. 24 10. 87 2. 59 1.64 trace 4. 79 trace 99. 02 2. 946 B2. Ill .648 .117 .025 .083 .381 .194 .042 .017 .060 — 4 36. 53 9. 91 3. 84 6.01 18. 10 10.31 3.06 1.-60 trace 8 . 38 trace 100. 64 2. 987 A2. II .609 .097 .024 .083 .453 .184 .049 .017 .105 — DOF EM A NE-UV ALDOSE. 361 ORDER 2. DOPOLIC. SCOTARE. SECTION 2. DOPYRIC. PAOLIARE—Continued. SUBRANG 2. DOMAGNESIC. l'AOLOSE. Inclusive. Norm. X 2.10 mi 9.5 di 21.8 Cl 0.03 lc 5.2 WO 11.4 FeS a 6.03 ne 9.7 ol 7.3 Sro trace am 10. 8 mt 1.9 il 5.9 hm 7.0 pr 6.0 X 0.24 an 13.6 di 40.7 ZrO.. none lc 3.5 ol 7.2 S 0.42 ne 3.4 am 8.4 mt 7.2 il 8.5 hm 4.2 np 1.9 an 12.8 di 46.3 lc 0.4 ol 5.2 ne 3.7 am 7.2 mt 13.7 il 8.3 hm 2.2 so 3 0.60 an 7.5 di 34.5 Cl 0.03 lc 10.5 ol 5.1 s 0.06 ne 9.1 am 3.7 no 5.0 mt 6.0 il 5.2 ap 4.9 Locality. Analyst. Reference. Author’s name. Remarks Magnet Cove, Arkansas. J. F. Williams. J. F. Williams, A. R. Ark. < r. S., 1890, II, p. 227, 1891. Nephelite- syenite, dark (jaeupirang- ite). Not fresh. Sum low. Magnet Cove, Arkansas. H. S. Washing¬ ton H. S. Washington, J. G., IX, p, 620,1901. Jacupirangite. Jacupiranga, Sao Paolo, , Brazil. H. S. Washing¬ ton. H. S. Washington, J. G., IX, p. 620, 1901. Jacupirangite. Petersberg, Frankisehe Alp, Bavaria. Not stated. C. W. v. Giimbel, Geog. Besch. Fr Alp Kassel, 1891, p. 569. Basalt. Not fresh. ORDER 2. DOPOLIC. SCOTARE. SECTION 3. PYROLIC. TEXIARE. SUBRANG 2. DOMAGNESIC. MARQUETTOSE. Cr 2 0 3 SrO 0.68 trace or 1.7 ab 4.2 an 9.2 di 7.4 hy 21.1 ol 37.5 mt 7.2 il 1.2 cm 1.0 Opin Lake, Marquette Region, Michigan. W. F. Hille- brand. Van Hise and Bavlev, 15 A. R. U. S. G. S., p. 511, 1895. Peridotite. Not fresh. SUBRANG 1. PERMAGNESIC. ab 11.5 an 3.9 ne 7.1 di 28.0 ol 34.1 mt 9.7 Supreya, N. Ural Mountains, Russia. Kultacheff. Loewinson-Lessing, G. Sk. Jushno-Sao. Dorpat, 1900, p. 166. Picrite. Not fresh. SUBRANG 2. DOMAGNESIC. UVALDOSE. I ZrO.) so 3 ‘ Cl F S NiO SrO none 0.03 0.05 0.04 0.01 0.06 0.03 or 3.3 an 11.1 lc 2.6 ne 11.9 di 29.3 ol 26.2 mt 7.0 il 5.1 ap 1.6 Tom Munn’s Hill, Uvalde County, Texas. W. F. Hille- brand. W. Cross, B. U. S. G. S., 168, p. 62, 1900. Nephelite- basalt. ZrOo Cl F S Cr 2 0 3 v ? o 3 NiO SrO none trace 0.07 trace 0.14 0.04 0.06 0.04 an 12.0 lc 4.9 ne 8.5 di 24.6 ol 32.1 am 2. 4 mt 6.3 il 5.1 ap 1.2 Black Mountain, Uvalde County, Texas. W. F. Hille- brand. W. Cross, B. U. S. G. S., 168, p. 63, 1900. Nephelite- basalt. Cr..0 3 3.06 an 16.1 lc 7.4 ne 11.9 di 25.0 ol 18.5 am 2.0 mt 1.2 il 8.9 cm 4.5 hm 3.2 Hohenhowen, Hegau, Baden. U. Gruben- mann. U. Grubenmann, In. Diss. Zurich, 1886, p. 31. Melilite-basalt. t Sum low. Ignit. = 2. 82. Cr 3 0 3 2.90 an 8.6 lc 7.4 ne 13.9 di 22.0 ol 24.6 pf 5.6 il 9.9 cm 4.3 hm 3.8 Wartenberg, Hegau, Baden. U. Gruben- mann. U. Grubenmann, In. Diss. Zurich, 1886, p. 20. Melilite-basalt. Ignit. = 2. 47. 302 CHEMICAL ANALYSES OF IGNEOUS ROCKS. CLASS IV. DOFEMANE—Continued. RANG 1. PERMIRLIC. TEXASE. SECTION 2. DOMIRIC. UVALDIASE. No. SiOjj ALjOj Fe-A FeO MgO CaO Na. 2 0 k 2 o h 2 o+ H,0- 1 O o 1C Ti0 2 PA MnO BaO Sum Sp. gr. 5 37. 98 9.30 5. 96 5. 86 17.13 10. 38 3.50 2. 03 2. 74 0. 36 2.02 0. 31 trace 100.15 3. 072 Al. I . 633 .091 .037 .081 .428 .168 . 056 .021 .025 .002 — 17° 6 39.47 11.26 8.74 4. 98 14. 33 12 . 08 5. 04 1.86 0.63 1.56 0.99 trrce 100.94 2. 896 B2. Ill .658 .110 .054 .070 .358 .216 .080 . 020 .020 .. 007 — 7 42. 58 9.58 4.97 10 . 22 16.97 11.54 2.01 0.54 1.04 0. 94 0.41 0. 25 101.05 B2. II .710 .094 .031 .141 .424 .206 .032 . 0C6 . C12 .003 .004 CLASS IV. DOFEMANE. RANG 1. PERMIRLIC. CASSELASE. SECTION 1. PERMIRIC. 1 38. 78 6 . 85 8 . 83 1.99 26. 34 3. 88 0. 78 2.56 7. 85 L 95 0.14 0. 89 100. 84 2. 728 to B2. Ill .646 .067 .055 .028 .654 .070 .013 .027 .oil 2.651 2 38. 62 4. 71 8 . 72 4.08 32. 32 3.97 0.17 0 . 20 6 . 46 • 0.60 trace 100 . 28 2. 931 A2. 11 .644 .046 .054 .057 .808 .071 .003 .002 .007 — RANG 1. PERMIRLIC. CASSELASE. SECTION 1. PERMIRIC. 1 A2. II 40. 12 .669 7. 76 .076 7.35 .046 8.66 .121 23. 69 .592 6 . 53 .116 1.20 .018 0. 53 .006 4. 03 trace o 1 ^ 0.18 .001 100 . 62 2.988 RANG 1. PERMIRLIC. CASSELASE. SECTION 2. DOMIRIC. CASSELIASE. 1 33. 84 5. 88 7.04 5. 16 22.96 9. 46 0. 33 2. 04 7. 50 0 . 68 0. 43 3. 78 0. 89 0.16 0 . 06 100.54 Al. I . 564 .058 .044 .072 .574 .169 .005 .022 .047 .006 .002 RANG 1. PERMIRLIC. CASSELASE. SECTION 2. DOMIRIC. CASSELIASE. 1 37. 96 10.14 3.69 7.59 14.69 16. 28 2 . 18 0. 69 1 . 82 0. 39 2.93 1.13 0 . 22 0 . 06 100..13 3.150 Al. I . 633 .099 .023 .106 .367 .291 .035 .007 .035 .008 .003 — 20°. 5 2 39.16. 10 . 06 6 . 54 7.71 13. 74 15. 30 CO CO 1.46 1.55 0. 58 1.52 0. 75 0.11 100 . 86 A2. II . 653 .099 .041 .107 .344 • .273 .039 .016 .019 . 005 .002 1 CLASS IV. DOFEMANE. RANG 1. PERMIRLIC. SECTION 1. 34. 98 10 . 80 1.42 21. 33 19. 30 0. 43 0.17 5. 42 .583 .106 .009 .296 .483 .007 .003 . 058 PERMIRIC. KALTENIASE. 1.28 5. 18 100.31 3. 276 . 0l>3 A3. Ill DOFEMANE-KALTENOSE. 363 ORDER 2. DOPOLIC. SCOTARE. SECTION 3. PYROLIC. TEXIARE—Continued. SUBRANG 2. DOMAGNESIC UVALDOSE—Continued. Inclusive. Norm. X 2.40 an 3.9 di 21.6 S 0.09 lc 9.2 Ol 25.6 SrO truce ne 15.9 am 4.9 mt 8.6 il 3.9 ap 0.7 an 2.8 di 22.7 lc 8.7 ol 17.7 ne 22. 7 am 8.1 rat 12.5 il 3.1 ap 2.2 or 3.3 di 35.5 ab 4.7 ol 27. 7 an 10.0 mt 7.2 ne G. 5 il 1.8 ap 1.0 Locality. Analyst. Reference. Author’s name. Hohenberg, Bi'ihne, Westphalia. Biltz. F. Rinne, Sb. Berl. Akad., 1891, p. 988. Melilite- nephelite basalt. Schafberg Plateau, Lobauer Berg, Saxony. J. Stock. J. Stock, T. M. P. M., IX, p. 466, 1888. Nephelite- basalt. Mindello, St. Vicente, Cape Verde Islands. C. v. John. C. v. John, .Tb. G. R-A. Wien., XLVI, p. 283, 1896. Dolerite. Remarks. Sum high. ORDER 2. DOPOLIC. SCOTARE. SECTION 4. DOMOLIC. SUBRANG 1. PERMAGNESIC. or 15.0 di 8.9 ab 1.6 . ol 42.8 an 7.5 mt 6.5 ne 2.8 il 1.7 hm 4.3 Murfreesboro, Pike County, Arkansas. R. N. Brackett. J. F. Williams, A. R. Ark. G. S., 1890, p. 383, 1891. Peridotite. Not fresh. Cr 2 0 3 0.43 or 1.1 di 6.5 ab 1.6 by 14.6 an 11.4 ol 42.9 mt 13.4 Ehrsberg, Schwarz - wald, Baden. J. H. Kloos. J. H. Kloos, N. J. B. B., Ill, p. 57, 1885. Pierite. Not fresh. SUBRANG 2. DOMAGNESIC. Cl trace or 3.3 di 14.3 FeS., 0.20 ab 9.4 hy 4.6 CuO trace an 14. 5 ol 40.9 mt 10.7 Newton Bushel, Dev¬ onshire, England. Iv. Busz. K. Busz, N. J., 1895, I, p. 74. Paleopierite. Quite fresh. SUBRANG 1. PERMAGNESIC. Cl 0.05 an 8.6 di 7.7 Flanarv dike, Crit- W. F. Hille- J. S. Diller, Mica-peridotite. Not fresh. F Cr.,0 3 NiO CoO 6.18 0.10 trace lc 9.6 ol 37.6 ne 1.4 am 8.5 mt 6.0 il 7.1 hm 2.9 ap 1.9 tenden County, Kentucky. brand. A. J. S., XLIV, p.288, 1892. SUBRANG 2. DOMAGNESIC. CASSELOSE. Zr0 2 none an 18.6 di 13.5 so 3 0.03 lc 3.1 nl 26.1 F 0.07 ne 9.9 am 13.8 S 0.04 mt 5.3 Cr 2 0 3 0.08 il 4.4 v.o 3 0.05 ap 2.6 NiO 0.04 SrO 0.05 CtoOr trace an 12.2 di 16.7 lc 7.0 ol 23.3 ne 11.1 am 13.7 mt 9.5 il 2.8 ap 1.8 Near Uvalde, Uvalde County. Texas. Oberleinleiter, Franken Jura, Bavaria. W. F. Hille- brand. Not stated. W. Cross, B. U. S. G. S., 168, p. 63, 1900. Leppla and Schwager, Geog. Jheft. Cassel, I, p. 69, 1888. Nephelite- melilite- basalt. Nephelite- basalt. ORDER 2. DOPOLIC. SCOTARE. SECTION 5. PEROLIC. SUBRANG 3. MAGNESIFERROUS. KALTENOSE. S0 3 trace an 2.2 ol 56.6 Kaltenthal, Hampe. M. Koch, Biotite- lc 20.1 kp 3.8 ne 1.6 mt 2.1 il 9.7 Harzburg, Harz Mountains. Z. D. (i. G., XLI. p. 165, 1889. peridotite. C 3.8 CHEMICAL ANALYSES OF IGNEOUS ROCKS. 3<)4 CLASS IV. DOFEMANE—Continued. RANG 1. PERMIRLIC. BERGENASE. SECTION 1. PERMIRIC. BERGENIASE. No. Si0 2 A1.A Fe-A FeO MgO CaO Na 2 0 k 2 o h 2 o+ H 2 0— co 2 Ti0 2 PA MnO BaO Sum Sp. gr. i A2. II 31.59 .527 8 . 54 .084 2. 36 .015 24. 52 .340 10 . 70 .207 2. 25 .040. 1.03 .016 0.15 .002 n. d. 18. 49 .231 0 . 02 99. 65 CLASS IV. DOFEMANE. RANG 1. PERMIRLIC. SECTION 2. DOMIRIC. 1 A2. II 35. 84 .597 10. 48 .103 7. 25 .045 6.62 .092 12. 95 .324 10. 90 .194 3. 53 .056 1.51 .016 8 . 85 .111 trace 100.77 3. 051 RANG 1. PERMIRLIC. SECTION 3. CALCIMIRIC. AVEZACIASE. 1 31.80 10. 96 12.23 9. 79 8.40 17. 34 0 . 66 0. 27 1.50 3.25 3.32 99. 46 A2. II .530 .108 .076 .137 .210 .310 .011 .003 .041 .023 CLASS IV. DOFEMANE. RANG 1. PERMIRLIC. SECTION 2. DOMIRIC. 1 35. 56 11 . 25 6 . 62 6 . 67 14. 68 8.99 3.86 1. 75 8 . 03 trace 100.07 3. 046 A2. II .593 110 .041 .093 .367 .177 .062 .019 .100 ■ CLASS IV. DOFEMANE. RANG 1. PREMIRLIC. ADIRONDACKASE. SECTION 1. PREMIRIC. ADIRONDACKIASE. 1 21.42 7.03 30.34 22.81 6.92 3.59 0. 53 0.41 0. 95 trace 5. 21 0.14 trace 99.81 Al. I . 357 .069 .190 .317 .173 .064 .009 .004 . 065 .001 — 2 11.73 6 . 46 30. 68 27. 92 3. 35 3. 95 0.50 0 . 26 0. 64 0. 32 12. 31 0.82 99.19 4.138 Al. I .196 .063 .192 .388 .084 .071 .008 .003 * .154 .006 CLASS IV. DOFEMANE. RANG 1. PERMIRLIC. CHAMPLAINASE. SECTION 1. PREMIRIC. CHAM PLAIN IASE. 1 17.90 10. 23 15. 85 27. 95 6.04 2 . 86 n. cl. n. d. 1.33 0.10 15. 66 D. 04 trace 99.15 4.138 A2. II .298 .100 .099 .389 .151 .051 — — .196 — — 2 13. 35 8 . 75 20. 35 28. 82 6 . 63 2.15 n. d. n. d. 1.68 0.17 16. 45 0 . 02 99. 62 A2. II .223 .086 .127 .400 .166 .039 — — .206 — DOFEMANE-CH AMPLAINORE. 305 ORDER 3. POLMITIC. SVERIGARE. SECTION 1. PERPYRIC. BERG ENT A R E. SUBRANG 3. MAGNESIFERROUS. BERGENOSE. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. or 1.1 nb 8.4 an 11.1 C 2.7 hv 34.6 ol 3.8 mt 3.5 il 35.1 Storgang, Soggendal, Norway. C. F. Kolderup. C. F. Kolderup, Berg. Mus. Aarb., 1896, No. 5, p. 165. Ilmenite-norite. ORDER 3. POLMITIC. SVERIGARE. SECTION 2. DOPYRIC. SUBRANG '2. DOMAGNESIC. Cr.,0 3 2.84 or 2.2 an 8.6 !c 5:2 ne 13. 9 di 27.2 ol 13.8 cm 4.1 il 11.4 pf 5.0 hni 7.3 Randen, Hegau, Baden. U. Gruben- mann. U. Grubenmann, In. Diss. Zurich., 1886, p. 23. Melilite-basalt. Ignit.—1. 92. SUB RANG 3. MAGNESIFERROUS. AVEZACOSE. an 26.1 lc 1.3 ne 3.1 di 26.2 ol 8.2 am 2.0 mt 17. 6 il 6.2 ap 7.6 Avezac-Prat, Pyrenees, France. A. Pisani. A. Lacroix, C.R., VIII. Cong. G., p. 832, 1901. Avezacite. ORDER 3. POLMITIC. SVERIGARE. SECTION 4. DOMOLIC. SUBRANG 2. DOMAGNESIC. Cr»0 3 2.66 an 8.1 lc 8.3 ne 17.6 di 16.6 ol 20.3 am 4.9 cm 4.0 il 11.6 pf 3.2 hm 6.6 Hohenstoffeln, Hegau, Baden. U. Gruben- mann. L T . Grubenmann, In. Diss. Zurich, 1886, p. 35. Melilite-basalt. Ignit.=l. 72 ORDER 4. DOMITIC. ADIRONDACKARE. SUBORDER 2. DOHEMIC. ADIRONDACKORE. SUBR 4.NG 4. DOFERROUS. Cl s Cr.,0 3 Org 0.42 0.04 none trace or 2.2 ab 4.7 an 15.6 di 1.8 hy 8.0 ol 12.0 mt 44.0 il 10.0 Elizabethtown, Essex County, New York. W. F. Hille- brand. J. F. Kemp, 19 A. R. U. S. G. S., Ill, p. 408, 1899. Titaniferous iron ore. Cl F S V 2 0 3 Org 0.12 trace 0.04 0.04 0.05 an 14.5 lc 1.3 ne 2.3 ol 10.6 mt 44.5 il 23.7 ap 1.9 Lincoln Pond, Essex County, New York. W. F. Hille- brand. J. F. Kemp, 19 A. R. U. S. G. S., Ill, p. 407, 1899. Titaniferous Iron ore. Sum low. ORDER 4. DOMITIC. ADIRONDACKARE. SUBORDER 3. TILHEMIC. CHAMPLAI^ORI SUBRANG 4. DOFERROUS. S Cr 2 0 3 v»o 3 0.14 0.51 0.55 an 15.2 C 6.0 hy 16.0 ol 8.8 mt 23. 0 il 30.1 Split Rock mine, Essex County, New York. W. F. Hille- brand. J. F. Kemp, 19 A. R. U. S. G. S., Ill, p. 402, 1899. Titaniferous iron ore. Sum low. Alkalies not determined. Cl s Cr„0 3 v»o 3 Org trace 0.09 0.55 0.61 trace an 10.8 C 4.8 hy 5.7 ol 14.8 mt 29.5 il 31.0 Elizabethtown, Essex County, New York. W. F. Hille- brand. J. F. Kemp, 19 A. R. U. S. G. S., Ill, p. 405, 1899. Titaniferous iron ore. Alkalies not determined. CHEMICAL ANALYSES OF IGNEOUS ROCKS 360 CLASS V. PERFEMANE. SUBCLASS I. P+O+M EXTREME OVER A. RANG 1. PERMIRLIC. WEBSTERASE. SECTION 1. PERMIRIC. MARICIASE. No. SA A1A Fe 2 0 3 FeO MgO CaO Na 2 0 K 2 0 H„0+ H 2 0 co 2 Ti0 2 P-A MnO BaO Sum Sp. gr. 1 51.94 2. 53 2. 88 9.38 25. 97 3. 60 none none 2. 82 none none trace 100.07 Al. I .805 .024 .012 .131 .049 .004 — — — — — 2 50.10 2.00 2. 38 8. 68 26. 85 5. 06 none none 4.16 none none 0. 29 100.14 Al. I .835 .020 .015 .121 .071 .090 — — — — .004 3 55. 23 2. 08 3.94 6. 25 29.29 1.68 1.12 0. 44 100.03 3.297 A2. II .921 .021 . 025 .087 . 732 .030 .000 RANG 1. PERMIRLIC. WEBSTERASE. SECTION 2. DOMIRIC. WEBSTERIASE. 1 53. 98 1.32 1.41 3. 90 22. 59 15. 47 n. d. n. d. 0. 83 0.09 0.15 trace 0. 21 100.48 3. 301 Al. I .900 .011 .009 .054 . 565 .277 .002 — .003 2 52.55 2. 71 1.27 4. 90 20. 39 16. 52 0. 27 1.09 0.14 trace 0. 24 100. 52 3. 304 A2. II . 876 . 022 .008 .068 .510 .295 .002 — .003 3 55.14 0. 66 3.48 4. 73 26. 66 8.39 0.30 none 0. 38 trace 0. 23 0.03 100.36 Al. I .919 .005 . 022 . 065 . 667 .150 .005 — -- .002 — RANG 1. PERMIRLIC. WEBSTERASE. SECTION 2. DOMIRIC. WEBSTERIASE. 1 53. 22 3.14 7.95 20.09 14. 44 trace trace 0. 98 none 0.11 100. 42 Al. I .887 .031 .in .502 .258 — — .002 2 53. 21 1.94 1.44 7.92 20. 78 13.12 0.11 0.07 0. 87 0.14 0.10 0. 26 trace 0. 22 none 100. 47 Al. I .887 .017 .009 .110 . 520 .234 .002 .001 .003 — .003 — 3 53. 25 2. 80 0. 69 5. 93 19.91 16. 22 0.19 trace 0. 24 0. 05 0.09 99.98 A2. II .888 .026 .004 .082 .498 .289 .003 — .001 CLASS V. PERFEMANE. RANG 1. PERMIRLIC. BALTIMORASE. SECTION 1. PERMIRIC. 1 49.42 3. 37 1.30 5. 75 34. 97 2. 11 — 1.84 0. 76 - 99.68 A3. Ill .824 .032 .008 .080 .874 .038 RANG 1. PERMIRLIC. BALTIMORASE. SECTION 2. DOMIRIC. BALTIMORIASE. 1 • Al. I 43. 87 .731 1.64 .016 8. 94 . 055 2.60 .036 27.32 .683 6. 29 .112 0. .008 50 7. 64 1.08 0. 12 .002 trace 0. 19 .003 100. 63 3. 022 RANG 1. PERMIRLIC. BALTIMORASE. SECTION 2 DOMIRIC. BALTIMORIASE • 1 50. 80 3. 40 1.39 8.11 22. 77 12. 31 trace trace 0. 52 none trace 0.17 100.03 3. 318 Al. I .843 . 033 .009 .112 .569 .219 — — — — .002 DOFEMANE-BALTIMOROSE. 367 ORDER 1. PERPOLIC. MAORARE. SECTION 1. PERPYRIC. CAROLINIARE. SUBRANG 1. PERMAGNESIC. MARICOSE. Inclusive. Norm. Locality. Analyst. Reference. Author’s name. Remarks. so 3 Cl Cr 2 0 3 0.19 0.16 0.60 Q 0.6 di 8.9 an 6.7 hv 76.4 nit 2.8 Johnny Cake Road, Baltimore County, Maryland. J. E. Whitfield. G. H. Williams, B. U. S. G. S., 148, p. 83, 1897. Pyroxenite. “Altered.” S ? 3 Cr ; 0 3 trace 0.26 0.36 an 5.6 di 15.4 hv 63.1 oi 7.6 mt 3.5 Q 3.7 di 2.0 an 5.8 hy 79.6 mt 5.8 il 0.9 Johnny Cake Road, Baltimore County, Maryland. Central Marico Dis¬ trict, Transvaal, South Africa. J. E. Whitfield. J. A. L. Hen¬ derson. G. H. Williams, B. U. S. G. S., 148, p. 83, 1897. J. A. L. Henderson, In. Diss. Leipzig, p. 39, 1898. Pyroxenite. Enstatite- pyroxenite. “Altered.” SUBRANG 1. PERMAGNESIC. WEBSTEROSE. Cr.,0 3 0.53 an 3.1 di 58.3 NiO trace hv 35.0 mt 2.1 Cr,0 3 0.44 ab 1.6 di 60.7 an 5.3 hv 29.8 mt 1.9 Cr.,0 3 0.25 Q 1.7 di 32.7 j Nib 0.11 ab 2.6 hv 57.1 mt 5.1 1 Hebbville, n. Baltimore, Maryland. T. M. Chatard. G. H. Williams, A. G., VI, p. 42, 1890. Websterite. Complete in B. U. S. G. S., 148,p.84,1897. Hebbville, n. Baltimore, Maryland. T. M. Chatard. G. PI. Williams, A. G., VI, p. 42, 1890. Websterite. Complete in B. U. S. G. S., 148,p.84,1897. Webster, North Caro¬ lina. E. A. Schneider. G. H. Williams, A. G., VI, p. 44, 1890. Websterite. Complete in B. U. S. G. S., 148,p.92,1897. SUBRANG 2. DOMAGNESIC. CECILOSE. S0 3 trace an 8.6 di 50.2 Dogwood Road, J. E. Whitfield. G. H. Williams, Pyroxenite. “Altered.” Cl 0.26 Cr.>0 3 0.23 hy 37.8 ol 2 2 Baltimore County, B. U. S. G. S., 148, Maryland. p. 83, 1897. Zr0 2 trace or 0.6 di 48.9 Oakwood, W. F. Hille- A. G. Leonard, Websterite. FeSo 0.03 Cr.>0 3 0.20 ab 1.0 hy 41.4 an 3.2 nit 2.1 Cecil County, brand. B. U. S. G. S., 168, Vo‘0 3 “ 0.03 il 0.5 Maryland. p. 43, 1900. NiO 0.03 SrO none Cr.0 3 0.54 ab 1.6 di 58.9 Bagiev Creek, W. H. Melville. W. H. Melville, Pyroxenite. NiO 0.07 an 6.4 hy 28.8 nl ? K Mount Diablo, B. G. S. A., II, mt 0.9 California. p. 406, 1891. ORDER 1. PERPOLIC. MAORARE. SECTION 2. DOPYRIC. MARYLANDIARE. SUBRANG 1. PERMAGNESIC. NiO 0.16 an 8.9 di 1.3 Gaggio Montano, P. E. Y. de P. E. V. de Regny, Norite. Alkalies? hy 57.2 ol 27.6 Bologna, Italy. Regny. cf. N. J., 1900, II, mt 1.9 p. 397. SUBRANG 1. PERMAGNESIC. Cr.0 3 0.44 ab 4.2 di 22.6 Johnnv Cake Road, T. M. Chatard. G. II. Williams, Lherzolite. Not fresh. NiO trace an 2.2 hy 34.3 ol 16.3 Baltimore County, A. G., VI, mt 8.4 Maryland. p. 39, 1890. hm 3.0 SUBRANG 2. DOMAGNESIC. BALTIMOROSE. S0 3 trace Cl 0.24 Cr 2 0 3 0.32 an 9.2 di 41.4 Johnny Cake Road, J. E. Whitfield. G. PI. Williams, Pyroxenite. hy 33.8 ol 12.2 Baltimore County, A. G., VI, mt 2.1 Maryland. p. 41, 1890. CHEMICAL ANALYSES OF IGNEOUS ROCKS 308 CLASS V. PERFEMANE—Continued. RANG 1. PERMIRLIC. SECTION 1. PERMIRIC. No. Si0 2 A1A Fe 2 0 3 FeO MgO CaO Na 2 0 k 2 o h 2 o+ H 2 0- co 2 Ti0 2 PA MnO BaO Sum Sp. gr. 1 41.43 0. 04 6. 25 43. 74 0. 55 4.41 none 99. 80 z. oz A2. II .691 — .015 .087 1.094 .010 — 2 42. 00 3.19 2.81 4.41 40. 40 3. 30 1.20 0. 29 1.66 4 trace 101.16 D3. IV .700 .031 .017 .061 1.010 .059 .019 .003 RANG 1. PERMIRLIC. SECTION 1. PERMIRIC. 1 42. 39 2.26 0. 35 10. 47 39.19 O 1.54 99. 51 3.152 A3. Ill .707 .022 .002 .146 .980 .041 CLASS i V. PERFEMANE. RANG 1. PERMIRLIC. DUNASE. SECTION 1. PERMIRIC. DUNIASE. 1 40.11 0. 88 1.20 6. 09 48. 58 2. 74 100.34 A2. II .669 .009 .007 .085 1.215 2 38. 40 0. 29 3.42 6. 69 45. 23 0. 35 0.08 4.11 0. 24 1.10 none trace 0. 24 none 100. 38 Al. I 3 .640 42. 80 .003 .021 .093 9. 40 1.130 47.38 .005 .001 trace 0. 57 100.15 A4. IV 4 A4. IV .713 39. 99 . 667 3. 55 .034 — .131 8. 56 .119 1.185 41.26 1.032 4.19 . 075 — — 2. 07 trace 99. 62 3.17- 3.32 — — — CLASS V. PERFEMANE. RANG 1. PERMIRLIC. SECTION 2 . DOMIRIC. 1 29.5 3.8 17.8 18.2 8. 7 10.0 0.2 0.1 1.0 9.2 0.3 99. 2 3.87 B2. Ill .492 .037 .ill .253 .218 .178 .003 .001 .115 .004 CLASS V. PERFEMANE. RANG 1. PERMIRLIC. SECTION 1. PERMIRIC. 1 4.08 6. 40 33. 43 34. 58 3.89 0. 65 0. 29 0.15 1.32 14. 25 0. 02 0. 45 99. 71 A2. II .068 .063 .209 .480 .097 .011 .005 .002 .176 — .006 PERFEMANE-DUNOSE. 369 ORDER 1. PERPOLIO. MAORARE. SECTION 4. DOMOLIC. SUBRANG 1. PERMAGNESIC. Inclusive. Norm. Cr,.0 3 0.76 di 2.3 NiO 0.10 hy 19.3 ol 69.2 mt 3.5 cm 1.2 Spinel 1.90 or 1.7 di 11.0 ab 2.6 ol 72.2 an 2.5 mt 3.9 ne 4.0 Locality. Analyst. Reference. Author’s name. Riddle, Douglas County, Oregon. F. W. Clarke. Diller and Clarke, B. U. S. G. S., 60, p. 23, 1890. Saxonite. Prades, Pyrenees, France. A. Brunet. A. Lacroix, cf. N. J., 1895, II, p. 267. Lherzolite. Remarks. Not fresh. Sum high. SUBRANG 2. DOMAGNESIC. Cr 2 0 3 0.28 an 6.1 di 4.2 hy 15.1 ol 71.2 Goose Bay, Strait of Magellan. Not stated. K. v. Khrustchoff, cf. N. J., 1888, I, Peridotite. Pebble. mt 0.5 p. 83. ORDER I. PERPOLIC. MAORARE. SECTION 5. PEROLIC. MAORIARE. SUBRANG 1. PERMAGNESIC. DUNOSE. Cr 2 0 3 Chromite 0.18 0.56 C 0.9 hv 4.7 ol 89.7 mt 1.6 cm 0.8 Corundum Hill, Macon County, North Carolina. T. M. Chatard. T. M. Chatard, B. U. S. G. S., 42, p. 55, 1897. Dunite. Zr0 2 S Cr 2 0 3 NiO SrO none 0.06 0. 07 0.10 none an 0.8 di 0.4 hy 6.2 ol 81.9 mt 4.9 Tulameen River, British Columbia. W. F. Hille- brand. J. F. Kemp, Priv. Contrib. Dunite. Not fresh. NiO trace hy 11.4 ol 88.2 Dun Mountain, South Island, New Zealand. A. Schrotter. F. v. Hochstetter, G. v. Neu Seeland, Wien, 1864, p. 220. Dunite. Cr 2 0 3 trace an 9.5 di 9.0 ol 78.0 mt 1.1 Olivine Range, South Island, New Zealand. T. Bateman. G. H. F. Ulrich, Q. J. G. S., XLVI, p. 629, 1890. Peridotite. ORDER 3. POLMITIC. SECTION 1. PERPYRIC. SUBRANG 3. MAGNESIFERROUS. FeS 2 0.4 Q 0.5 di 32.3 or 0.6 hy 10.3 ab 1.6 mt25.8 an 9.2 il 17.7 Drum an Eidhne, Island of Skye, Scotland. J. H. Player. Geikie and Teall, Q. J. G. S., L, p. 653, 1894. Basic schliere in gabbro. Sum low. One decimal. ORDER 5. PERMITIC. SUBORDER 2. DOHEMIC. SUBRANG 4. DOFERROUS. Cr 2 0 3 0.20 or' 1.1 mt 48.5 ab 2.6 il 26.8 an 3.1 MgO 3. 9 C 4.6 FeO 6.9 Routivaara, Finland. W. Petersson. W. Petersson, G. F. F., XV, p. 49, 1893. Magnetite- spinellite. 14128 — No. 14—03 24 \ PAET II. INFERIOR ANALYSES, AND ANALYSES OF TUFFS, ASHES, AND DECOMPOSED ROCKS ARRANGED ACCORDING TO THE SYSTEM OF PETROGRAPHY PRESENTED IN ZIRKEL’S LEHRBUCH. 371 372 CHEMICAL ANALYSES OF IGNEOUS ROCKS. GRANITE. No. 1 B3. IV 2 C4. V 3 C3. V 4 C2. IV 5 D2. V 6 C3. V 7 D2. V 8 D2. V 9 C3. V 10 C3. V 11 L4. V 12 B3. IV 13 D4. V 14 D4. V 15 D4. V 16 B3. V 17 C2. IV 18 B4. V 19 B3. IV 20 €3. V SiO a A1A Fe 2 0 3 1 FeO i MgO CaO j Na 2 0 K 2 0 H,0+ h 2 o— co 2 Ti0 2 PA MnO Sum Sp. gr. 1 \ 69. 39 J 1 17.46 n. d. 1.38 0.52 2.14 5.18 2. 77 0.47 0. 06 99. 37 | 74. 64 i 14.90 1.56 n. d. trace 0.39 i 0. 41 6. 88 0. 27 99. 05 ■ | 73.02 16. 22 n. d. 2.59 trace 0. 94 3. 60 3. 42 (0.21) trace 100. 00 GC c 15.26 n. d. 1.42 0. 09 0. 88 3.12 5.66 n. d. none 0.10 100. 01 | 71 ' 54 ! 14. 24 0. 74 1.18 0. 34 0. 98 3. 39 4. 73 0. 61 trace 0. 84 98. 59 | 69. 56 15.38 2. 65 n. d. trace 1. 76 5.38 4. 31 1. 02 100.06 J 71.44 14. 72 2. 39 0. 46 0. 96 trace 7. 66 0. 89 0. 61 0. 78 trace trace 99.91 2.635 } 70-« 14. 64 1.54 2.34 1.20 trace 7. 80 0. 71 0. 61 0. 48 trace trace 99.74 2. 634 |J 72.47 16.17 n. d. 0.41 0.14 1.65 3.43 4. 83 (0.49) 0.39 100. 00 J j 76.07 12. 67 2.00 n. d. 0.10 0. 85 3. 37 4. 71 n. d. • 0. 03 99. 80 jj 75.14 15.57 n. d. 2. 49 n. d. 1.85 4. 41 0.54 n. d. 100.00 1 69. 47 U 17.50 2. 30 n.d. 0.31 2.57 • 3.01 4.07 0. 74 0. 08 trace 100. 09 1 73. 05 J 14.53 2.96 n.d. trace 2. 06 (1.72) 5.39 0. 29 trace 100. 00 lj 71.64 15. 66 2.34 n. d. trace 2. 70 (1.58) 5.60 0. 48 trace 100. 00 2. 654 ; j 72. 73 16. 95 trace 1.05 0. 90 8.15 0. 22 100. 00 | 68. 11 14. 28 n. d. 2. 63 0. 68 1.86 6.57 5.46 n. d. 99. 93 J 63.19 10. 50 10.97 1.51 1.44 6.12 1.92 4. 02 0.19 99. 86 j 69.33 14. 33 n.d. 3. 60 2.44 3.21 2. 70 2. 67 1.22 0.10 99. 60 | 66. 82 15.62 1.88 1.69 1 2.76 3.13 ■2. 58 2. 04 3. 27 99. 79 j 67. 98 16.14 n.d. 4.39 I 0. 53 5. 89 4.32 0. 45 0. 30 100. 00 INFERIOR ANALYSES. 373 GRANITE. Inclusive. S none S trace S trace S trace S trace S 0.02 S 0.04 S 0.34 Locality. Analyst. Reference. Author’s name. Remarks. McLaren Bay, Lake Keepawa, Quebec. F. G. Wait. G. C. Hoffmann, A. R. ( L S. Can., IN, p. 19R, 1898. Granitite-gneiss. Blue Hill, Hancock County, Maine. H. J. Williams. W. C. Dav, 19 A. R. U.S. G. S., II, p. 215,1898. Granite. Alkalies? Blue Hill, Hancock County, Maine. Ricketts and Banks. W. C. Day, 18 A. R. U.S.G. S., V, p. 962,1897. Granite. Alkalies? H 2 0 by differ¬ ence. Waldoboro, Lincoln County, Maine. Ricketts and Banks. W. C. Day, 20 A. R. U.S. G. S., VI, p. 391,1899. Granite. North Jay, Maine. E. T. Rodgers. W. C. Day, 19 A. R. U.S.G. S., VI (2),p. 219,1898. Granite. Barre, Vermont. W. C. Day? W. C. Day, 19 A. R. U. S. G. S., VI (2), p. 224,1898. Granite. H 2 0 includes C0 2 . Redstone, Carroll County, New Hamp¬ shire. F. C. Robinson. W. C. Day, 20 A. R. U. S. G.S., VI, p. 417,1899. Red granite. Alkalies? Redstone, Carroll County, New Hamp¬ shire. F. C. Robinson. * W. C. Day, 20 A. R. U. S. G. S., VI, p. 417,1899. Green granite. Alkalies? Mason, Hillsboro County, New Hamp¬ shire. Ricketts and Banks. W. C. Day, 20 A. R. U.S. G. S., VI, p. 418,1899. Granite. H 2 0 by differ¬ ence. Milford, Massachusetts. C. F. Chandler. W. C. Day, 19 A. R. U. S. G. S., VI (2), p. 221,1898. Granite. Quincy, Massachusetts. E. R. Angell. W. C, Dav, 19 A. R. U. S. G.S., VI (2), p. 229,1898. Granite. Cf. No. 11, lipa- rose. Chester, Hampden County, Massachu¬ setts. Not stated. W. C. Day, 18 A. R. U. S. G. S., V, p. 965, 1897. Granite. Westerly, Rhode Island. F. W. Love. J. F. Kemp, B. G. S. A., X, p. 375, 1899. Granite. Na 2 0 by differ¬ ence. Westerly, Rhode Island. F. W. Love. J. F. Kemp, B. G. S. A., N, p. 375, 1899. Granite. Na 2 0 by differ¬ ence. Stony Creek, Connecti¬ cut. L. P. Kinnicut. J. F. Kemp, B. G. S. A., X, p. 375, 1899. Granite. Waterford, Connecticut. Ricketts and Banks. W. C. Day, 19 A. R. U. S. G. S., VI (2), p. 214, 1898. Granite. Stony Point, Rockland County, New York. J. F. Geiste. W. C. Day, 20 A. R! U. S. G. S., VI, p. 421, 1899. Granite. Iron oxides? A1 2 0 3 ? Alkalies? Pierce’s Mill, Broad Branch, District of Columbia. R. L. Packard. G. H. Williams, 15 A. R. U. S. G. S., p. 672, 1895. Granite. Pierce’s Mill, Broad Branch, District of Columbia. R. L. Packard. G. P. Merrill, B. G. S. A., VI, p. 323, 1895. Granite. Decomposed. Wilmington, Delaware. Booth, Garrett, and Blair. W. C’. Day, 19 A. R. U. S. G. S., VI (2), p. 214, 1898. Granite. 374 CHEMICAL ANALYSES OF IGNEOUS ROCKS GRANITE—Continued. 21 C4. V 22 D3. V 23 B4. V 24 B4. V 25 At. I 26 Al. I 27 Al. I 28 Al. I 29 C4. V 30 Al. I 31 1)3. V 32 B3. IV 33 C3. V 34 B3. IV 35 B4. IV 36 B4. V 37 B4. V 38 D4. V 39 B4. V 40 C4 V SiO, A1A Fe 2 0 3 FeO MgO CaO Na. 2 0 k. 2 o H 2 0+ 1 o C0 2 Ti0 2 PA MnO Sum . Sp. gr. 64.12 20. 91 2. 96 n. d. 0.66 1.98 4.57 4. 82 n. d. 100. 02 64. 85 11.44 2. 94 6.02 1. 60 3. 49 3.92 3. 02 0. 78 0. 24 trace 98. 30 2. 788 76. 62 13. 02 1.01 n. d. 0.05 0.51 2.24 6. 38 n. d. 99. 83 77. 05 11.77 2. 33 n. d. n. d. 2.21 2. 90 ■ 3. 88 0. 52 0.02 100. 68 65.14 15. 63 2. 37 2.13 1.85 3. 62 2. 63 4. 29 0. 75 0. 37 0. 59 0. 16 trace 99. 68 64. 81 19. 44 1.82 0.16 0.19 0.18 0. 21 5. 30 5. 25 1.41 none 0. 73 0.10 trace 100.01 71.93 12. 21 0.64 2. 99 0. 58 2. 59 0. 23 3. 29 0. 37 2. 06 1.95 0. 40 . 0.10 0.18 99. 92 66. 66 14. 26 0. 67 2.41 0. 95 3.37 none 4.19 2.16 0.36 3. 67 0. 49 0. 17 trace 100. 31 75.35 13. 69 3. 94 n. d. 0. 06 2. 97 1.14 2. 85 n. d. 100. 00 84.15 9. 67 0. 51 0. 07 0. 04 0. 53 2. 65 # 1.57 0. 74 0. 21 trace trace 100.14 64.91 21.49 1.G9 4. 62 1.13 0.71 • 2.72 3.55 ' n. d. 100. 22 75. 8 13.7 0. 5 0.3 trace 0. 5 1.9 6.5 0. 03 99.5 2.59 66.6 17.4 1.1 ' 2.1 1.2 2. 2 3.1 4. 6 0.9 99.2 2. 62 62.3 18.6 1.5 3.0 2.5 4.3 1.9 4.8 0.6 % 99.5 2. 67 68. 55 16. 21 2. 26 n.d. 1.04 2. 40 4. 08 4.14 n. d. 0. 45 99.13 70. 6 13.3 3.1 n. d. 0.4 2. 2 0. 8 9.2 0. 3 99.9 75. 00 13. 24 2. 52 n. d. n. d. 0. 69 3. 07 4. 33 0.80 99.65 71.78 15. 86 4.19 n.d. 0.50 3.16 4.10 1.13 1.17 101. 89 70.69 15. 20 3. 76 n.d. 0. 45 3. 31 4. 69 2. 31 0. 56 101.07 71.80 16.00 1.76 n. d. 1.83 1. 74 3.47 4. 20 0. 62 101.42 INFERIOR ANALYSES. 375 GRANITE—Continued. Inclusive. Locality. Analyst. Reference. Author’s name. Remarks. Petersburg, Virginia. Hunt and Clapp. AY. C. Dav, 19 A. R. U. S. G.S., VI (2), p. 227, 1898. Granite. A1 2 0 3 high. Sudbury, Ontario. Not stated. T. L. Walker, Q. J. G. S., LIII, p. 56, 1897. Granite. Waushara County, Wisconsin. Not stated. AY. C. Dav, 18 A. R. U. S. G. S., V, p. 975, 1897. Granite. Graniteville, Missouri. AY. H. Melville. AY. C. Dav, 18 A. R. U. S. G. S., A T , p. 968, 1897. (Iranite. S0 3 BaO SrO 0.05 0.10 trace Butte, Montana. H. N. Stokes. AY. H. Weed, J. G., VII, p. 749, 1899. Granite. Weathered. Cf. Nos. 5 and 6, harzose. so 3 BaO SrO 0.31 0.10 trace Butte, Montana. H. N. Stokes. AA r eed and Tower, B. U. G. S., 168. p. 117, 1900. Granite. Altered. Cf. Nos. 5 and 6, harzose. S NiO BaO Fe Zn Pb 0.18 none trace 0.13 0.09 trace Hailey, Idaho. W. F. Hillebrand. AAh Lindgren, 20 A. R. U. S. G. S., Ill, p. 219, 1900. Quartz-monzonite. Altered. Cf. No. 31, toscanose S0 3 s BaO none 0.95 none Silver Wreath Tunnel, Boise County, Idaho. G. Steiger. ' AY. Lindgren, 18 A. R. U. S. G. S., Ill, p. 640, 1898. Granite. Altered. Cf. No. 4, yellowstonose. Exeter, Tulare County, California. AVatertown Arse¬ nal. AY. C. Day, 20 A. R. U. S. G. S., VI, p. 358, 1899. Granite. F SrO 0.02 trace Belmont, Nevada. H. N. Stokes. J. E. Spurr, A. J. S., X, 11 . 858, 1900. Beresite. Janucillo, Monte Cum- bre, Argentina. J. C. Jenkins. A. Stelzner, Btr. G. Pal. Arg. Rep., I, p. 211, 1885. Andengranit. A1 2 0 3 high. Ben Damhain, Loch Garabal, Scotland. J. H. Player. Dakyns and Teall, Q. J. G. S., XLV1II, p. 115, 1892. Eurite. Alt-na-Lairige, Loch Garabal, Scotland. J. H. Player. Dakyns and Teall, Q. J. G. S., XLA'III, p. 115, 1892. Granitite. Alt-na-Lairige, Loch Garabal, Scotland. J. H. Player. Dakyns and Teall, Q. J. G. S., XLVIII, p. 115, 1892. Hornblende- granitite. Shap Fell, Westmore¬ land, England. J. B. Cohen. Harker and Marr, Q. J. G. S., XLVII, ji. 276, 1891. Granite. Y Drosge, Caernarvon¬ shire, Wales. E. H. Acton. A. Harker, Bala A’oleanic Series, 1889, p. 46. Granophyre. Mourne Mountains, County Down, Ire¬ land. S. Haughton. A\ T . J. Sollas, Tr. R. Ir. Acad., XXX, Pt. XI, p. 491, 1894. Granite Aughrim, Leinster, Ireland. Net stated. AA'. J. Sollas, Tr. R. Ir. Acad., XXIX, Pt. XIV, p. 477, 1891. Microgranite. Aughrim, Leinster, Ireland. Not stated. AA'. J. Sollas, Tr. R. Ir. Acad., XXIX, Pt. XIV, p. 471, 1891. Soda-granite. Le ITuelgoat, Brittany, France. Not stated. C. Barrois, Guide Exc. A T III Cong. G. Int., VII, p. 21, 1900. Granite. 376 CHEMICAL ANALYSES OF IGNEOUS ROCKS No. 41 IM. V 42 C3. V 43 C4. V 44 B4. V 45 B3. IV 46 C3. V 47 D3. V 48 C3. V 49 D3. V 50 B3. IV 51 D4. V 52 D2. V 53 C2. IV 54 C2. IV 55 B4. V 56 B4. V 57 A4. IV 58 A4. IV 59 A4. IV 60 B4. V GRANITE—Continued. Si0 2 A1 2 0 3 Fe 2 0 3 FeO MgO O Na.,0 k 2 o h 2 0+ h 2 o- co 2 Ti0 2 FA MnO Sum Sp. gr. J 73. 79 12.36 0. 63 0.52 0.19 trace 5. 45 5. 71 0.51 99.16 2. 573 J 66. 62 17.35 3. 91 0.19 trace trace 4.52 ' 4. 93 1.85 0. 99 100.36 | 75. 59 12. 93 n. d. n. d. n. d. trace 3.44 7. 05 0. 69 99. 70 j 70. 14. 80 n. d. 3. 07 trace 1. 33 2.51 8. 26 n. d. 100. 67 ) 06.07 20. 96 n.d. 3.28 0. 77 6.58 6. 63 ' 2. 91 1.96 0. 68 100. 52 | 67. 3 15.2 1.2 3.4 1.2 3.6 3.8 3.4 1.7 0.4 101.2 j- 71. 53 13. 70 1. 79 2.34 0. 48 2. 08 6. 71 2. 82 0. 34 101.79 j 69. 52 14. 04 0.34 4. 42 0.32 2. 40 3. 40 . 6. 25 0.52 101.21 | 66. 95 15.03 2.14 3. 23 0. 33 3.22 4. 43 2.46 0. 39 98.18 J- 76. 86 10. 76 1.97 n. d. 0. 81 1.42 2.46 4. 33 1.04 trace trace 0.36 100. 01 2. 655 1 l 76.10 1 14. 36 2. 99 trace 1.51 trace 3. 77 0. 81 0.11 0. 48 100.13 2.469 1 74.19 12. 80 2.11 1.17 0.50 n. d. 2. 49 4. 48 0.30 0. 04 0.06 0.65 98. 81 (99. 82) j 77.56 14.39 1.40 1.27 0. 93 2. 01 3.31 4. 82 1.18 0. 31 101. 20 2. 668 j 68. 90 16. 80 * V_ 1.77 1.64 1.34 1.80 3. 90 3.11 1.91 0. 24 101. 41 2. 681 1 74 ' 29 15. 95 0.66 0. 78 2. 66 5.31 0. 66 trace trace 100.31 2. 68 J 69. 26 14.13 4.38 n. d. 3. 31 4.31 1.54 1.96 0. 99 99.88 j j 76. 62 11.76 n.d. 3. 51 0. 22 1.80 3.02 2. 85 0. 70 100. 48 || 76.20 12. 89 n. d. 1.72 0. 80 0.50 ■ 3.19 3. 93 1 1.16 100.39 j 75. 96 13. 38 n.d. 1.66 0.34 0. 88 ' 3.32 4. 58 0. 46 100. 58 | 75.23 16.13 n. d. trace 0.13 0. 88 3. 87 3. 77 0. 83 i 100.84 INFERIOR ANALYSES. 377 G RA NIT E—Conti lined. Inclusive. Locality. Analyst. Reference. Author’s name. Remarks. Apietto, Corsica. G. Rupprecht. G. Rupprecht, In. Diss. Erlangen, 1889, p. 14. Granite. Alkalies high. Ajaccio, Corsica. G. Rupprecht. G. Rupprecht, In. Diss. Erlangen, 1889, p. 6. Biotite-granite. ♦ PA high. Kullen, Sweden. L. G. Thome. A. Hennig, cf. N. .T. 1901, II, p. 59. Pegmatite. ■ ’ Vasastaden, Sweden. H. Biickstrom. H. Biickstrom, G. F. F., IX, p. 357, 1887. Granite. Slattmosa, Sweden. H. Biickstrom. H. Biickstrom, OFF IX, p. 360, 1887. Granite. Upsala, Sweden. A. G. Hogbom. A. G. Hogbom, G.F. f:, X, p. 222,1888. Granite. Wiborg, Finland. H. Berghell. II. Berghell, Finl. G. Und. Bl. 33, p. 23,1898. Rapakiwi granite. Huovila, Sakkijarvi, Finland. H. Berghell. II. Berghell, Finl. G. Und. Bl. 28, p. 15,1896. Rapakiwi granite. Simola, Wiborg, Finland. H. Berghell. H. Berghell, Finl. G. Und. Bl. 33, p. 25,1898. Rapakiwi granite. BaO trace Dilshofen, Hesse. F. W. Schmidt. C. Chelius, Erl. G. Kte. Hesse, I, Bl. Rossdorf, p. 36,1886. Microgranite. * Dacbsberg, Hesse. F. W. Schmidt, C. Chelius, Erl. G. Kte. Hesse, I. Bl. Rossdorf, p. 35,1886. Granitite. BaO 0.02 Gottelsberg, Aschaffen- burg, Hesse. Not stated. G. Klemm, Erl. G. Kte. Hesse, III, Bl. Schafheim, p. 15,1894. Granite. Sum uncertain. Li 2 0 trace Cu trace Reuth, Bavaria. A. Bbttger. F. v. Sandberger, Sb. Munch. Akad., XVIII, p. 466,1888. Lithionite-granite. Strehlenberg, Redwitz, Bavaria. A. Bottger. F. V. Sandberger, Sb. Munch. Akad., XVIII, p. 466, 1888. Lithionite-granite. Rican, Prague, Bohemia. E. Kubricht. F. Katzer, Jb. Wien. G. R-A., XXXVIII, p.411,1888. Granite. Reifnig, Bacbergebirge, Styria. A. Pontoni. A. Pontoni, T.M.P.M., XIV, p. 366,1895. Granite. Aig. du Grand Ckarmoz, Mont Blanc. Duparc. Duparc and Mrazec, Mem. Soc. Phvs. Gen., XXXIII, No. 1, p. 48, 1898. Protogine. Near Orny, Mont Blanc. Duparc. Duparc and Mrazec, Mem. Soc. Phvs. Gen., XXXIII, No. 1, p. 48, 1898. Protogine. Arete du Chatelet, Mont Blanc. Duparc. Dupare and Mrazec, Mem. Soc. Phys. Gen., XXXIII, No. 1, p. 47, 1898. Protogine. Les Rogues, Mont Blanc. Duparc. Duparc and Mrazec, Mem. Soc. Phys. Gen., XXXIII, No. 1, p. 82, 1898. Aplite. 378 CHEMICAL ANALYSES OF IGNEOUS ROCKS No. 61 A4. IV 62 C4. V 63 A4. IV 64 A4. IV 65 A4. IV 66 C4. V 67 A4. IV 68 A4. IV 69 D4. V 70 A4. IV 71 A4. IV 72 A4. IV 73 A4. IV 74 A4. IV 75 D4. V 76 B4. V 77 D4. V 78 B4. IV 79 A3. Ill 80 A4. IV SiO ■2 | 75.21 | 74.66 74.14 | 73. 85 72. 08 71.84 | 71.64 1 70. 62 69. 95 69. 85 69. 54 68. 91 | 68. 55 68. 53 | 66. 35 | 69.30 j 70.34 GRANITE—Continued. A1A FeA FeO MgO CaO Na 2 0 K 2 0 H 2 0+ H 2 0- C0 2 Ti0 2 PA MnO Sum Sp. gr. 13.88 n. d. 0. 91 0.25 1.19 3.96 4.50 0. 24 100.14 i 13.84 n.d. 2. 01 0.41 1. 05 3. 33 5.34 0.64 101.28 13. 30 n. d. 1.61 0.20 0.69 3. 63 6. 08 0.60 100.25 15.23 n. d. 1.14 0.29 1.68 3. 27 4.10 0.36 99. 92 14. 83 n.d. 1.79 0. 28 1.15 3.42 5.49 0. 53 99.91 16.12 n. d. 2. 01 0. 32 1.20 3.43 5. 71 0. 74 101.68 13. 54 n. d. 2. 75 0. 40 1.15 4. 33 4. 76 0.51 99. 52 14.07 n. d. 2.01 0. 40 1.08 4.11 5. 25 0. 86 99. 62 17.12 trace. d . n. d. 1.62 3. 87 3. 95 n. d. 98. 20 15.50 n. d. 2. 84 0. 32 2.05 3. 05 4. 76 1.01 100.15 14. 35 n. d. 3.47 1.20 1.27 3. 32 4. 92 1.29 99. 77 16.10 n. d. 1.89 0. 71 0. 72 3. 21 6. 13 0. 90 99. 51 15. 20 n. d. 2. 76 0. 34 2.16 4.19 5. 37 0. 97 / 100. 53 15.89 n. d. 3. 46 0. 60 2. 35 4. 10 4. 01 0. 53 99. 85 15. 95 n. d. 1.85 0. 46 1. 86 3. 70 5. 57 0.91 98. 85 20. 37 0. 45 2.47 3. 17 5. 25 0. 39 100. 63 17. 47 n. d. 3. 18 0. 46 2.31 5.64 5. 43 0. 73 101. 57 16. 40 n. d. 4. 50 1. 18 1. 12 5. 02 3. 46 n. d. ICO. 98 13. 64 1.04 n. d. 0.09 0. 59 1.23 0.18 12. 52 0.24 100.22 2.613 11° 16.17 2. 54 n. d. 0. 86 2.11 3. 45 4.29 0. 66 100. 49 INFERIOR ANALYSES. 379 GRANITE—Continued. Inclusive. Locality. Analyst. Reference. Author’s name. Remarks. Aig. du Tacul, Mont Blanc. Duparc. Duparc and Mrazec, Mem. Soc. Phys. Gen., XXXIII, No. 1, p. 82, 1898. Aplite. Treutz-Bouc, Mont Blanc. Duparc. Duparc and Mrazec, Mem. Soc. Phys. Gen., XXXIII, No. 1, p. 48, 1898. Protogine. Arete de la Breya, Mont Blanc. Duparc. Duparc and Mrazec, Mem. Soc. Phys. Gen., XXXIII, No. 1, p. 47, 1898. Protogine. Aig. du Charmoz, Mont Blanc. Duparc. Duparc and Mrazec, Mem. Soc. Phys. Gen., XXXIII, No. 1, p. 82, 1898. Aplite. Col du Geant, Mont Blanc. Duparc. Duparc and Mrazec, Mem. Soc. Phys. Gen., XXXIII, No. 1, p. 48, 1898. Protogine. H Pas d’Arpette, Mont Blanc. Duparc. Duparc and Mrazec, Mem. Soc. Phvs. Gen., XXXIII, No. 1, p. 48, 1898. Protogine. Le Pissoir, Mont Blanc. Duparc. Duparc and Mrazec, Mem. Soc. Phvs. Gen., XXXIII, No. 1, p. 48, 1898. Protogine. Clocher de Planereuse, Mont Blanc. Duparc. Duparc and Mrazec, Mem. Soc. Phvs. Gen., XXXIII, No. 1, p. 47, 1898. Protogine. Glacier du Trient, Mont Blanc. * Duparc. Duparc and Mrazec, Mem. Soc. Phys. Gen., XXXIII, No. 1, p. 82, 1898. Aplite. Aiguille du Dru, Mont Blanc. Duparc. Duparc and Mrazec, Mem. Soc. Phys. Gen., XXXIII, No. 1, p. 48, 1898. Protogine. • Col du Chardonnet, Mont Blanc. Duparc. Duparc and Mrazec, Mem. Soc. Phys. Gen., XXXIII, No. 1, p. 48, 1898. Protogine. Glacier d’Orny, Mont Blanc. Duparc. Duparc and Mrazec, Mem. Soc. Phys. Gen., XXXIII, No. 1, p. 48, 1898. Protogine. Glacier d’Orny, Mont Blanc. Duparc. Duparc and Mrazec, Mem. Soc. Phys. Gen., XXXIII, No. 1, p. 48, 1898. Protogine.- Glacier de Brensa, Mont Blanc. Duparc. Duparc and Mrazec, Mem. Soc. Phys. Gen., XXXIII, No. 1, p. 48, 1898. Protogine. • Glacier d’Orny, Mont Blanc. Duparc. Duparc and Mrazec, Mem. Soc. Phvs. Gen., XXXIII, No.'l, p. 48, 1898. Protogine. . Le Portalet, Mont Blanc. Duparc. Duparc and Mrazec, Mem. Soc. Phys. Gen., XXXIII, No. 1, p. 47, 1898. Protogine. Rocher Tourette, Mont Blanc. Duparc. Duparc and INI razee, Mem. Soc. Phys. Gen., XXXIII, No.'l, p. 48, 1898. Protogine. Serra di Longone, Elba, Italy. A. Funaro. A. Funaro, B. Com. G. Ital., XVII, p. 381, 1886. Granite. F 0.35 Kyssyr Dagh, Karabagh District, Trans-Caucasia. A. Rohrig. C. R. Thost, Abh. Senkenb. Nat. Ges., XVIII, p. 219, 1894. ' Granite. Altered. Cap Marsa, M6nerville, Algeria. Duparc and Pearce. Duparc, Pearce, and Ritter, Mem. Soc. Phys. Gen., XXXIII, No.*2, p. 18, 1900. Tourmaline-granite. 380 CHEMICAL ANALYSES OF IGNEOUS ROCKS GRANITE—Continued. No. 81 C4. V 82 A4. IV 83 B4. V Si0 2 A1A Fe 2 O s FeO MgO CaO Na 2 0 K 2 0 h 2 o+ H 2 0- C0 2 Ti0 2 PA MnO Sum Sp. gr. j 64.48 18. 39 4. 67 n. d. 1.61 4. 48 2. 77 3. 39 1.32 101.11 J 63.54 17.24 5. 72 n. d. 1. 7Q 4.31 3. 22 2. 90 1.30 99. 93 j 75.54 13. 75 4. 99 n. d. 0.69 0. 94 1.55 3.34 0. 28 101. 08 1 C3. V 2 D4. V 3 A4. IV 4 B3. IV 5 B4. V 6 B'2. Ill 7 B4. V 8 B4. IV 9 A2. II 10 C4. V 11 B3. IV 12 1)4. V 13 C3. V 14 D4. V 15 B4. V 16 B4. V QUARTZ-PORPHYRY. | 74. 21 12. 77 2.51 2.04 1.04 0. 98 ■ 2.17 5.44 n. d. * trace 101.16 j 67. 20 14. 95 5.19 n. d. 2.39 0. 30 4.00 0. 89 2.13 0. 40 97.45 2. 43 J 67.9 15.7 3.0 n. d. 1. 5 1.4 1. 5 5.6 3.7 100.3 J 73. 69 14,26 0. 73 0.41 trace. trace. 3. 76 7.84 0. 31 101.00 2. 626 J 76.40 15. 68 0. 78 n. d. n. d. n. d. 4. 92 1.10 0. 88 99. 76 2. 603 j 75. 78 11.22 0. 56 2. 54 0. 53 0.95 2.14 4. 08 1.26 1.16 0. 31 100. 82 | 73.03 14. 33 2.64 n. d. 0. 41 0. 74 2. 97 2. 07 2. 58 trace 0. 69 99.46 2. 654 j 72. 08 16.15 2.21 n. d. 0. 68 0.18 0. 21 ' 5. 23 2. 40 99.14 2. 594 J 70. 88 15.15 3. 22 0. 55 0. 53 0. 21 0. 23 5.51 2. 72 0. 32 0. 26 99. 75 2. 685 J 75.76 12.24 n. d. 2. 06 0. 29 2.51 3.13 4. 22 n. d. 0. 83 \ 0. 44 101.48 J 76. 66 10. 85 0. 96 n. d. trace. 0. 32 0. 49 9. 58 0. 61 trace 99. 47 | 68. 45 12. 40 4. 20 n. d. 0. 67 L 53 4. 36 5.91 1.24 98. 76 J 66.83 16. 40 3.17 1.89 1.07 2. 59 4.65 4. 21 0. 51 101. 32 J 78.25 13. 22 n. d. 1.11 0. 26 1.29 3. 88 4. 00 0. 48 102. 49 J 75. 81 13. 70 n. d. 2.24 trace. 0. 72 3. 96 4.13 n. d. 100. 56 J 75. 81 13.15 n. d. 1.16 0.35 0. 89 3. 66 5.43 0. 40 . « 100. 85 INFERIOR ANALYSES. 381 GR A NITE—Continued. Inclusive. Locality. Analyst. Reference. Author’s name. Remarks. Sidi Mokren, Menerville, Algeria. Duparc and Pearce. Duparc, Pearce, and Ritter, Mem. Soc. Phvs. Gen., XXXIII, No. 2, p. 18, 1900. Granite. Ain Tolba, Menerville, Algeria. Duparc and Pearce. Duparc, Pearce, and Ritter, Mem. Soc. Phys. Gen., XXXIII, No. 2, p. 18, 1900. Granite. St. Thomas Mount, Madras, India. T. L. Walker. T. H. Holland, Mem. G. S. India, XXVIII, p. 142, 1900. Charnockite. QUARTZ-PORPHYRY. Blue Hills, Massachu¬ setts. Students of Mass. Inst. Techn. W. 0. Crosby, Occ. Pap. Bost. Soc. Nh., IV, p. 362, 1900. Quartz-porphyry. Mean of many poor determi¬ nations. Flagstaff Hill, Boulder, Colorado. Palmer and Fulton. Palmer and Fulton, Pr. Colo. Sci. Soc., Ill, p. 356, 1890. Quartz-porphyry. ( Coquet, Cheviot Hills, Scotland. Waller. J. J. H. Teall, Geol. Mag., XXII, p. Ill, 1885. Quartz-l’elsite. Ajaccio, Corsica. G. Rupprecht, G. Rupprecht, In Diss. Erlangen, 1889, p. 11. Quartz-porphyry. Goldstein, Westphalia. A. Bomer. O. Miigge, N. J. B. B., X, p. 776, 1896. Quartz-porphyry. S0 3 0.12 Rospe, Westphalia. K. Gremse. O. Miigge, N. J. B. B., VIII, p. 577, 1893. Porphyry tuff. Oberhunden, West¬ phalia. .... A. Bomer. O. Miigge, N. J. B. B., VIII, p. 568, 1893. Porphyry. Metamor¬ phosed. Bruchhauser Steine, W estphalia. ■ . A. Bomer. O. Miigge, N. J. B. B., X, p. 776, 1896. Quartz-porphyry. Metamor¬ phosed. S0 3 0.17 j Alvensleben, Magde¬ burg, Hesse. Hampe. F. Klockmann, Jb. Pr. G. L-A., XI, p. 196, 1892. Quartz-porphyry tuff. Libsic, Moldauthal, Bohemia. Plaminek. J. Ivlvana, Cf. N. J., 1898, I, p. 485. Felsophyre. LLO trace Czeremosz River, Galicia. J. Schramm. R. Zuber, T. M. P. M., VII, p. 196, 1886. Halleflinta. Zalas, Cracow, Galicia. R. Zuber. R. Zuber, Jb. Wien. G. R-A., XXXV, p. 747, 1885. Quartz-porphyry. Javoria, S. Carinthia. H. V. Graber. H. V. Graber, Jb. Wien. G. R-A., XLVII, p. 278, 1897. Quartz-porphyry. Arete du Chatelet, Mont Blanc. Duparc. Duparc and Mrazec, Mem. Soc. Phys. Gen., XXXIII, No.'l, p. 107, 1898. Quartz-porphyry. Arete de la Breya, Mont Blanc. Duparc. Duparc and Mrazec, Mem. Soc. Phys. Gen., XXXIII, No. 1, p. 107,. 1898. Quartz-porphvrv. Chalet de Planereuse, Mont Blanc. Duparc. Duparc and Mrazec, Mem. Soc. Phys. Gen., XXXIII, No. 1, p. 107, 1898. Quartz-porphyry. 382 CHEMICAL ANALYSES OF IGNEOUS ROCKS. QUARTZ-PORPHYRY—Continued. No. Si0 2 A1 2 0 3 Fe 2 0 3 FeO MgO CaO Na 2 0 k 2 o H 2 0+ H 2 0- O c to Ti0 2 PA MnO Sum Sp. gr. 17 1 73.25 14. 39 n. d. 2. 21 0.53 2. 36 3. 02 5.94 1.11 102. 81 D4. V 1 18 } 71.48 14. 82 n. d. 2.42 0.27 0.93 4. 00 5.69 0. 35 99. 96 A4. IV ) 19 1 71.03 15.24 n. d. 2. 58 0. 43 1.39 4. 29 6.12 0. 27 101. 35 C4. V J 20 69. 81 14. 78 n. d. 3.15 0. 98 2.94 3. 73 4. 63 0. 78 100. 80 B4. V 1 21 1 68. 87 16. 49 n. d. 2. 62 0. 32 2. 25 4.13 5. 89 0. 83 101.40 C4. V 1 22 i 67. 78 15. 88 n. d. 3.97 1.25 2. 90 3.95 4. 95 1.32 102. 00 D4. V I 23 l 71.10 15.92 3.17 0. 34 trace 0. 88 3.17 6.11 0.11 0. 45 101.25 C3. V J 24 1 70.10 16.25 n. d. 4. 05 0. 54 1.32 4. 27 4. 20 n. d. 100.73 C4. V 1 25 1 } 68.5 14.5 1.0 3.0 0.1 trace 9.2 3.0 n. d. 99.3 B3. IV 1 26 [ 75.51 18.10 2. 69 n. d. 0.12 0. 36 0.16 1.23 n. d. 0. 82 98. 99 C4. V RHYOLITE. 1 D4. V j 73.09 13. 43 2.57 n. d. 1.03 2. 29 3. 85 1.58 0. 76 98. 60 2 A2. II j 61. 21 15. 67 4. 06 0.62 1.58 2.18 1.57 2. 75 10. 20 0.56 0.10 100. 50 3 A4. IV J 71.01 15 17 n. d. 0. 34 1.19 2. 77 2.97 6. 34 99. 79 4 A3. Ill j 68. 68 12. 69 1.14 1.17 1. 14 1.11 1.23 5. 58 7.99 100. 73 5 Al. I j 87. 37 7.44 0. 09 0.18 0.12 0.10 0.14 1. 79 1.39 0.51 0.09 trace trace 100. 24 6 Al. I j 78.59 12.13 none 0.09 0. 41 0.16 0.10 2. 55 2.47 0. 82 0.12 trace trace 100. 07 7 C2. IV J 66. 69 15. 40 1.84 n. d. 0. 85 0.09 0.16 3. 50 2.97 0. 83 2.11 0. 08 trace 98. 71 8 A2. II J 89. 20 2.39 1.21 none trace trace 1.11 0. 79 5. 09 none none 100. 23 9 A4. IV j 75.07 12.15 1.62 n. d. 0.14 0.86 \ 4.12 4.57 1.34 0.05 99. 92 INFERIOR ANALYSES. 383 QUARTZ-PORPH YRY—Continued. Inclusive. Locality. Analyst. Reference. Author’s name. Remarks. Col du Grepillon, Mont Blanc. Duparc. Duparc and Mrazec, Mem. Soc. Phys. Gen., XXXlII, No. 1, p. 108, 1898. Quartz-porphyry. Les Six-niers, Mont Blanc. Duparc. Duparc and Mrazec, Mem. Soc. Phys. Gen., XXXIII, No. 1, p. 108, 1898. Quartz-porphyry. La Maya, Mont Blanc. Duparc. Duparc and Mrazec, Mem. Soc. Phvs. Gen., XXXIII, No. 1, p. 108, 1898. Quartz-porphyry. Arete du Chatelet, Mont Blanc. Duparc. Duparc and Mrazec, Mem. Soc. Phys. Gen., XXXIII, No. 1, p. 107, 1898. Quartz-porphyry. La Maya, Mont Blanc. Duparc. Duparc and Mrazec, Mem. Soc. Phvs. Gen., XXXIII. No. 1, P . 107, 1898. Quartz-porphyry. L’Amone, Mont Blanc. Duparc. Duparc and Mrazec, Mem. Soc. Phys. Gen., XXXIII, No. 1, p. 108, 1898. Quartz-porphyry. Malga Serra Caprile, Adamello Group, Piedmont. C. Riva. C. Riva, cf. N. J., 1897, II, p. 63. Quartz-porphyry. • Mola, Serra de Lon- gone, Elba. A. Funaro. A. Funaro, B. Com. G. Itab, XVII, p. 381, 1886. Quartz-porphyry. - Comende, San Pietro, Sardinia. S. Bertolio. S. Bertolio, Rend. Acc. Line., V, p. 151, 1896. Comendite. Cf. No. 74, lipa- rose. Golabara River, Servia. A. B. Griffiths. A. B. Griffiths, Q. J. G. S., XLII, p. 566, 1886. Porphyry. RHYOLITE. - Utley, Green Lake County, Wisconsin. S. Weidman. S. Weidman, B. Wise. G. Nh. S., Ill, p. 14, 1898. Metarhyolite. Cf. B. U. S.G.S., 150, p. 169, 1898. Checkerboard Creek, Castle Mountains, Montana. L. V. Pirsson. Weed and Pirsson, B. U. S. G. S., 139, p. 128, 1896. Rhyolite tuff. Bozeman, Montana. F. W. Clarke. A. C. Peale, B. U. S. G. S., 148, p. 141, 1897. Rhyolitic volcanic dust. i Gallatin Valley, Gallatin County, Montana. H. N. Stokes. J. P. Iddings, B. U.-S. G. S., 150, p. 147, 1898. Rhyolite ash. FeSo NiO BaO SrO 1.00 none 0.02 none De Lamar Mine, Silver City, Idaho. W. F. Hille- brand. W. Lindgren, 20 A. R. U. S. G. S., Ill, p. 179, 1900. Altered rhyolite. FeS.. NiO BaO SrO 2.61 none 0.02 none De Lamar Mine, Silver City, Idaho. W. F. Hille- brand. W. Lindgren, 20 A. R. U. S. G. S., Ill, p. 179, 1900. Altered rhyolite. - S0 3 FeS.> BaO' 0.11 3.99 0.09 De Lamar Mine, Silver City, Idaho. H. N. Stokes. W. Lindgren, 20 A. R. U. S. G. S., Ill, p. 179, 1900. Altered rhyolite. so 3 0 .44 Iron Pot, Lower Basin, Yellowstone National Park. J. E. Whitfield. W. H. Weed, B. U. S. G. S., 148, p. 132, 1897. Altered rhyolite. Summit County, Colorado. Teplitz. A. Lagorio, T. M. P. M., VIII, p. 454, 1887. Nevadite. >•2 02 40 01 85 91 59 14 70 72 6 9 5 09 30 79 06 33 4 31 37 CHEMICAL ANALYSES OF IGNEOUS ROCKS. RH YOLITte—Continued. Fe,O s FeO MgO CaO Na.,0 K,0 H 2 0+ H 2 0- co 2 Ti0. 2 1.22 n. d. trace 1.38 : • » 1 2. 28 3.97 6.12 1.31 1.61 0. 37 0.56 2.11 2.39 7.41 1.05 1.47 0.50 0. 72 1.06 1.94 5.12 4. 68 i 0. 73 n. d. trace 0. 87 5. 58 2. 68 6.15 n. d. 0. 89 n. d. 0. 77 3. 62 4. 79 1.19 0.80 n. d. 0. 30 0. 76 3. 30 5. 35 1.03 1.99 n. d. 0.40 1.93 3. 97 2. 55 n. d. 2. 98 n. d. 0. 59 1.07 4. 77 4. 45 n. d. 0. 38 5. 25 n. d. 1.34 3. 33 5. 45 4.19 n. d. 1.06 0.7 1.1 trace 0.9 1.7 4.7 5.2 3.0 n. d. 1.5 1.4 1. 5 5.6 3.7 6.1 n. d. n. d. n. d. 0.3 5.8 0.4 1.80 • 1.50 trace 6. 07 1.27 1.31 • 2.16 n. d. 2. 02 trace 3. 41 4. 80 1.69 3. 32 n. d. 0. 62 1.94 4.12 2. 99 1.08 1.33 n. d. 1.26 trace 4. 11 5. 90 0. 26 4.02 n. d. 1.59 trace 1.64 5. 05 1.34 1.6 n. d. n. d. 0.6 1.8 4.2 1.5 2. 31 n. d. 0. 20 0. 97 3.02 4. 07 1. 48 1.42 1.08 0.52 1.30 4.15 3. 98 4. 86 0.08 0.04 0. 07 INFERIOR ANALYSES. 385 RHYOLITE—Continued. Inclusive. Locality. Analyst. Blue Mountain, Silver Cliff, Colorado. L. G. Eakins. Hyampom, Trinity County, California. G. Steiger. Willard’s Creek, Lassen County, California. G. Steiger. Berkeley, California. C. Palache. Pinto Peak, Nevada. E. Hart. Tablon de Itulgache, Ecuador. A. Lagorio. Kaldadalur, Iceland. R. Breon. Hrafntinnuh raun, Hecla, Iceland. H. Backstrom. Namshraun, Iceland. H. Backstrom. Arran, Scotland. J. H. Player. • The Coquet, Cheviot Hills, Scotland. T. W r aller. Cwm-Silyn, Caernarvon, Wales. Acton and Hewitt. Pen-y-foel, St. Davids, Wales. C. Gibbins. , FeS° 0.90 Pen-y-foel, St. Davids, Wales. C. Gibbins. Cader Idris, Wales. T. H. Holland. Carn Gelli, Pembrokeshire, W ales. F. E. Tadman. Carn Pica, Pembrokeshire, Wales. F. E. Tadman. Tardree, County Antrim, Ireland. J. H. Player. S trace Cir Mhor Dike, Arran, Scotland. Under Thorpe. Cir Mhor Dike, Arran, Scotland. Under Thorpe. Reference. Author’s name. Remarks W. Cross, 17 A. R. U. S. G. S., II, p. 322, 1896. Rhyolite tuff. J. S. Diller, B. U. S. G. S., 148, p. 228, 1897. Rhyolite tuff. J. S. Diller, B. U. S. G. S., 148, p. 192, 1897. Rhyolite tuff. C. Palache, B. Dep. G. Un. Cal., I, p. 67, 1894. Soda-rhyolite. J. P. Iddings, B. U. S. G. S., 150, p. 162, 1898. Liparite. A. Lagorio, T. M. P. M., VIII, p. 444, 1887. Obsidian. R. Breon, Geol. d’Islande, 1884, p. 29. Obsidian. H. Backstrom, G. F. F., XIII, p. 641, 1891. Liparite. H. Backstrom, G. F. F., XIII, p. 645, 1891. Liparite. J. J. H. Teall, Brit. Petrog., 1888, p. 347. Pitchstone. C. T. Clough, Geol. Chev. Hills, Mem. G. S. Gt. Br., 1888, p. 25. Quartz-felsite. A. Harker, Bala Volcanic Series, 1889, p. 13. Rhyolite. C. L. Morgan, Q. J. G. S., XLVI, p. 262, 1890. Felsitic tuff. C. L. Morgan, Q. J. G. S., XLVI, p. 262, 1890. Felsite. Cole and Jennings, Q. J. G. S., XLV, p. 435, 1889. Eurite. F. R. C. Reed, Q. J. G. S., LI, p. 177, 1895. Felsite. F. R. C. Reed, Q. J. G. S., LI, p. 178, 1895. Felsite. J. J. H. Teall, Brit. Petr. 1888, p. 348. Liparite. J. W. Judd, Q. J. G. S., XLIX, p. 545, 1893. Quartz-felsite. J. W. Judd, Q. J. G. S., XLIX, p. 545 1893. Pitchstone- porphyry. 14128—No. 14—03 25 380 CHEMICAL ANALYSES OF IGNEOUS ROCKS RH Y OLITE—Continued. No. Si0 2 A1 2 0 3 FeA FeO MgO CaO Na,0 K 2 0 H 2 0+ H,0— O O Ti0 2 PA MnO Sum Sp. gr. 30 A4. IV J 72.50 11.53 2.06 n. d. 2. 72 1. 79 3. 37 5. 24 0. 70 99. 91 31 A3. Ill | 77. 26 13. 05 1.64 n. d. 0. 24 0. 72 5.41 0.65 0. 55 0.15 99. 67 2. 637 32 B4. V 33 B4. V . j 71.44 12 90 n. d. n. d. 0. 82 4.24 2.19 8. 42 100. 01 j 75.82 13. 67 n. d. 0. 05 0. 58 1.69 6. 59 1.07 99. 47 2. 451 34 C4. V | 72.98 14.13 n. d. 0.17 1. 73 3.44 3. 45 3. 85 99. 45 2. 408 25 B4. V j 71.39 15. 57 n. d. 0.51 1.29 2. 28 5.43 3. 95 100. 42 2. 394 26 A4. IV | 72. 30 15. 52 2. 98 n. d. trace 1.25 2. 95 4. 73 none 99. 73 27 €4. V J 71.50 20. 31 0. 79 n. d. n. d. 1.51 1.92 3.58 0. 70 100. 31 28 B4. V 29 B,k V j 71.41 15.07 3. 68 n. d. trace 1.72 1.18 2: 95 4. 05 100. 06 | 74.30 16. 56 n. d. 0.16 1.35 2. 62 4. 32 0. 23 99. 54 So B4. V j 72.35 13.97 1.29 n. d. 0.46 0. 72 3. 58 5. 38 1.37 99.12 2.133 31 C4. V | 79. 1 8.9 1.9 n. cl. 0.7 trace 3.9 3.1 0.8 1.1 99.5 32 B4. V 33 1 B4. V | 7 9 - 1 8.2 1.3 n.d. 0.9 1.1 3.4 2. 2 (3.8) 100.0 1 76.84 5. 87 3.92 0. 87 0.52 3. 34 5.41 1.69 0. 73 99.19 34 D4. V | 70.03 18. 63 0.11 n. d. 0.10 2. 62 3. 15 4. 28 99.12*. 35 B4. V J 69.2 8.3 5. 4 n. d. trace 0.1 6.9 2.9 7.0 99.8 36 C4.V j 77.99 12. 50 1.20 n. d. 0.09 1.21 2.99 4.95 0. 48 101.41 37 B4.V | 77.50 12. 83 1.66 n. d. 0. 24 1. 50 3.44 3.45 0.43 101.05 38 B4. V 39 B4.V j 76.68 13. 63 1.44 n. d. 0. 23 0.99 2. 85 4. 91 0. 36 101. 09 1 75.49 15. 27 n. d. 0.18 1.26 2.61 4.12 0. 82 99. 75 40 B4.V 1 73. 58 13. 73 n. d. 0.17 1.85 2. 41 3. 32 5. 62 100. 68 INFERIOR ANALYSES. 387 RHYOLITE—Continued. Inclusive. Locality. Analyst. Reference. Author’s name. Remarks. Tormore, Arran, Scotland. M. M. Tait. J. W. Judd, Q. J. G. S., XLIX, p. 558, 1893. Felsite. Altenshausen, n. Magdeburg, Prussia. Bodlander. F. Klockmann, Jb. Pr. G. L-A., XI, p. 200, 1892. Silicified tuff. Meissen, Saxony. A. Lagorio. A. Lagorio, T. M. P. M., VIII, p. 490, 1887. Pitchstone. Schemnitz, Hungary. A. Lagorio. A. Lagorio, T. M. P. M., VIII, p. 448, 1887. Liparite. Hliniker Thai, Hungary. A. Lagorio. A. Lagorio, T. M. P. M., VIII, p. 454, 1887. Lipari te- pitchstone. Hlinik, Hungary. A. Lagorio. A. Lagorio, T. M., P. M., VIII, p. 444, 1887. Liparite-perlite. Conti, Ponza Island, Italy. Aichino. V. Sabatini, B. Com. G. Ital., XXIV, p. 246, 1903. Rhyolite. Montagniello, Ponza Island, iEolian Islands. Aichino. V. Sabatini, B. Com. G. Ital., XXIV, p. 246, 1893. Rhyolite. AI 2 O s high. Cala d’ Inferno, Ponza Island, Italy. ' Aichino. V. Sabatini, B. Com. G. Ital., XXIV, p. 245, 1893. Rhyolite-tuff. Lipari Island, ./Eolian Islands. ■ A. Lagorio. A. Lagorio, T. M. P. M., VIII, p. 491, 1887. Obsidian. Mte. Campo Bianco, Lipari Island, Italy. A. Lagorio. A. Lagorio, T. M. P. M., VIII, p. 440, 1887. Obsidian. Comende, San Pietro, Sardinia. S. Bertolio. S. Bertolio, B. Com. G. Ital., XXV, p. 417, 1894. Perlite. Carloforte, San Pietro, Sardinia. S. Bertolio. S. Bertolio, B. Com. G. Ital., XXV, p. 411, 1894. Rhyolite. H. 2 0 by differ¬ ence. Spalmatore, San Pietro, Sardinia. H. Fiirth. F. Eigel, T. M. P. M., VIII, p. 67, 1887. Rhyolite. Alkalies not sep¬ arated. San Pietro, Sardinia. Boetsch. F. Eigel, T. M. P. M., VIII, p. 70, 1887. Obsidian. Alkalies not sep¬ arated. Pescetti, San Pietro, Sardinia. S. Bertolio. S. Bertolio, B. Com. G. Ital. XXVII, p. 186, 1896. Perlite. Cap Marsa, Menerville, Algeria. Duparc and Pearce. Duparc, Pearce, and Ritter, Mem. Soc. Phys. Gen., XXXIII, No. 2, p. 77, 1900. Liparite. Sidi Zerzor, Menerville, Algeria. Duparc and Pearce. Duparc, Pearce, and Ritter, Mem. Soc. Phys. Gen., XXIII, No. 2, p. 115, 1900. Liparite. Cap Marsa, Menerville, Algeria. Duparc and Pearce. Duparc, Pearce, and Ritter, Mem. Soc. Phys. Gen., XXXIII, No. 2\ p. 77, 1900. Liparite. . Bon Ivonfor, Menerville, Algeria. Duparc and Pearce. Duparc. Pearce, and Ritter, Mem. Soc. Phvs. Gen., XXXIII, No. 2, p. 26, 1900. Liparite. Sidi Zerzor, Menerville, Algeria. Duparc and Pearce. Duparc, Pearce, and Ritter, Mem. Soc. Phvs. Gen., XXXIir, No. 2, p. 115, 1900. Liparite. 388 CHEMICAL ANALYSES OF IGNEOUS ROCKS RHYOLITE—Continued. No. Si0 2 A1A Fe 2 0 3 FeO MgO CaO Na-jO K 2 0 H 2 0+ H 2 0— o o Ti0 2 J\A MnO Sum Sp. gr. 41 1 70. 56 12. 80 1.96 n. d. 0. 50 1.70 2.18 4. 28 6.30 0. 28 I 0.06 100. 62 A4, IV 1 42 1 74.87 14. 23 1. 75 n. d. 1.16 1.99 3. 03 2. 35 1.60 100. 98 B4. V 1 43 75. 36 14. 21 0.13 n. d. trace 0. 84 4. 78 2. 72 1.09 99.13 B3. IV 1 44 1 75.51 14. 30 1.01 n. d. 0. 24 1.81 1.21 2.89 2. 84 99. 81 B4. V 45 B3. IV 1 | 68.15 16.49 3.26 none none 4. 01 3. 88 1. 59 1.82 0. 26 99.46 2.107 18° .. 1 A4.IV 2 C4. V 3 D4.V 4 B4.V 5 D4. V 6 B4.V 7 D4.V 8 A4.IV 9 • D?3. V? 10 A4.IV 11 A3. Ill 12 A3. Ill 13 A4. IV 14 C4. V SYENITE. | 63. 02 14. 87 6.53 n. d. 0.95 1.12 5. 85 5.62 1.45 % 0.46 99. 87 j 62.96 13. 45 3. 54 n. d. 0. 61 1.28 5. 46 5.19 2. 77 5.29 100. 55 | 59. 48 13.46 6. 71 n. d. 1.64 1.83 11.67 6. 03 0. 20 0.17 101.19 j 54. 15 18.92 6. 79 n. d. 1.90 3. 72 5.' 47 8. 44 n. d. 99.81 j 53.80 19. 20 n. d. 7.60 4. 80 5. 70 2.16 5.08 ’ 1.28 0. 77 1.20 101.59 1 j 62. 52 14.13 7, 38 n. d. 1.50 3.36 6. 25 3.05 1.20 99. 39 | 59.92 16. 07 8. 76 n. d. 2.07 4. 56 3.02 2. 82 0. 67 97,89 | 56. 79 16. 64 9.58 n. d. 2. 63 5.12 5. 30 2.55 1.27 99. 88 j 55.00 20. 81 3. 29 3. 83 2. 33 5. 44 5. 87 0.16 0.55 97. 28 (100. 28) J 58. 80 16. 84 2. 04 n. di 2. 75 0. 70 5.41 4.14 2. 79 100. 35 | 47. 05 18. 52 5.91 3.11 4. 24 4. 71 3. 58 1.83 2. 70 100. 23 1 43. 33 i 17. 88 6. 80 4. 46 4.99 2.18 3. 53 1.02 3.36 100. 69 j 61.97 15.11 6. 95 n.d. 4. 05 2. 87 4.01 2. 43 2.98 0. 08 100. 41 j 61.40 16. 66 7. 46 n. d. 3.65 2. 08 4. 75 2. 93 0. 76 1.54 101.43 INFERIOR ANALYSES. 389 RHYOLITE—Continued. Inclusive. Locality. Analyst. . Reference. .1 1 Author’s name. Remarks. Urgub, Asia Minor. Schwager. L. v. Ammon, cf, N. J. 1900, II, p. 61. Liparite tuff. Derike, n. Teheran, Persia. E. Drasche. C. v. John, Jb. Wien, G. R-A., XXXIV, p. 115, 1884. Porphyry. Marekanka River, Kamtchatka. P. Wenjukoff. P. Wenjukoff, cf. N. ,T., 1891, I, p. 281. Liparite glass. Tweed River, New South Wales. W. F. Smeeth. W. F. Smeeth, J. R. Soc. N. S. W., XXVIII, p. 311, 1894. Pitchstone. Bondi, n. Sydney, New South Wales. A. Liversidge. A. Liversidge, J. R. Soc. N. S. W., XX, p. 236, 1887. Pumice. Floated block. SYENITE. Beekmantown, Clinton County, New York. E. W. Morley. H. P. Cushing, B. G. S. A., IX, p. 248, 1898. Syenite-porphyry. Fourche Mountain, Little Rock, Arkansas. R. N. Brackett. J. F. Williams, A. R. Ark. G. S., 1890, II, p. 99, 1891. Quartz-syenite. A1 2 0 3 low. MnO high. Sawtooth Mountains, Transpecos, Texas. A. Osann? A. Osann, T. M. P. M., XV, p. 428, 4895. Syenite. Alkalies high. A1 2 0 3 low. Cl 0.42 South Boulder Creek, Montana. G. P. Merrill. G. P. Merrill, Proc. U. S. Nat. Mus. XVII, p. 672, 1895. Syenite. Rochail, Lac Lauvitel, France. P. Termier? P. Termier, ( R CXXIV, p. 319, 1897. Mica-syenite. Vettakollen, Kristiania, Norway. Kjerulf. Cf. W. C. Brogger, Z. K., XVI, p. 50, 1890. Akerite. / Barne Kjern See, Vettakollen, Nor¬ way. Kjerulf. Cf. W. C. Brogger, Z. K., XVI, p. 50, 1890. Akerite. Vettakollen, Kristiania, Norway. Kjerulf. Cf. W. C. Brogger, Z. K., XVI, p. 50, 1890. Akerite. Ullernas, Norway. G. Forsberg. W. C. Brogger, Z. K., XVI, p. 49, 1890. Akerite. K a O=3.16? FeSo CaC0 3 3.13 3.75 Vakkero, Kristiania Fjord, Norway. G. Forsberg. W. C. Brbgger, Z. K., XVI, p. 64, 1890. Mica-syenite- porphyry. Center of dike. Not fresh. FeS, CaC0 3 1.95 6.63 Vakkero, Kristiania Fjord, Norway. G. Forsberg. W. C. Brogger, Z. K., XVI, p. 64, 1890. Mica-syenite- porphyry. 1 foot from bor der of dike. Not fresh. FeS>2 CaC0 3 3.00 10.34 Vakkero, Kristiania Fjord, Norway. G. Forsberg. W. C. Brogger, Z. K., XVI, p. 64, 1890. Mica-syenite- porphyry. Border of dike. Not fresh. Rothschbnberg, Deutsch- enbroda, Saxony. J. M. C. Hender¬ son. J. M. C. Henderson, Z. D. G. G., XLVII, p. 539, 1895. Mica-syenite. S. 0.20 Rothschbnberg, Deutsch- enbroda, Saxony. Fritsch and Vena¬ tor. J. M. C. Henderson, Z. D. G. G., XLVII, p. 539, 1895. Mica-syenite. Not fresh. 390 CHEMICAL ANALYSES OF IGNEOUS ROCKS. S Y ENITE—Continued. ^No. Si0 2 ai 2 o 3 Fe 2 0 3 FeO MgO CaO Na 2 0 K,0 H 2 0+ H 2 0- C0 2 Ti0 2 PA MnO Sum Sp. gr. 15 1 57. 63 16. 47 5. 37 n. d. 4. 44 5.25 5.15 3.12 0. 45 2. 14 * 100. 97 B4. V I 16 62.52 23.54 2.15 1.38 0. 26 1. 65 4.16 4. 02 0.03 99. 71 C3. V 1 17 1 48. 94 15.89 n.d. 14. 25 1.27 8. 76 5.20 3. 82 1. 13 100. 56 B4. V 1 18 i 54. 43 20. 57 4. 52 n. d. 3. 47 5. 89 5. 30 4.98 0. 69 99. 85 C4. V 1 MONZONITE. 1 Al. I J 71.14 16. 24 0. 94 0.16 1.12 0.25 0. 07 4.96 2. 74 0. 49 none 0. 75 0.32 trace 99.51 2 B4. V j 57.11 17.00 12.48 n. d. 1. 78 3. 99 3. 96 2. 59 n. d. 1.59 100. 50 3 C3. V J 49.25 16.97 15.21 n. d. 3.00 7. 17 4.91 2.01 0. 30 trace 1.41 0. 76 100. 99 PORPHYRY. 1 i 63. 85. 17.51 1.94 0. 55 n. d. 5. 67 0. 25 4. 77 1.02 i 3. 70 99. 88 B4. V. 1 2 ' 1 68.40 14. 07 7.15 n. d. 3. 21 1.10 5. 09 1.70 100. 72 B4. V. J 3 . l 63.4 17.9 8.4 n. d. 1. 4 1.02 3. 96 4.2 0. 72 trace 101.00 B4. V. 1 4 1 62.3 15. 7 6. 7 n. d. 3.1 2.1 3. 77 4.21 1.30 99.18 C4. V. J 5 1 62.3 14.1 8.2 n. d. 3.4 1.3 4.4 3.5 9 9 trace 99. 40 B4. V. J 6 1 62. 06 13.7 8.9 n. d. 1.4 1.05 5.19 6.0 1.41 trace 99. 71 B4. V. 1 7 1 61.07 11.8 13.1 n. d. 1.9 1. 99 2.8 5. 5 1. 6 trace 99. 76 B4. V. J 8 1 59.5 11.8 13.1 n. d. 2.7 2. 2 3. 96 4. 32 1.55 trace 99.13 C4. V. J 9 1 54.0 18.9 7.8 n. d. 0.7 3.8 6, 5 3.9 2.3 2.0 0.4 100.3 B4. V. 1 10 1 67. 40 15.62 3.15 n. d. 0. 56 1.87 2.51 7.10 0. 50 98. 71 D4. V. J INFERIOR ANALYSES. 391 SYENITE—Continued. 1 Inclusive. Locality. Analyst. Reference. Author’s name. Remarks. s. 0.95 Triebischbach, Roth- schonberg, Saxony. Fritsch and Yena- tor. J. M. C. Henderson, Z. D. G. G., XLVII, p. 543, 1895. Mica-syenite. Not fresh. Ditro, Siebenburgen, Hungary. J. Szadeczkv. J. Szadeczkv, of. N. J., 1901, I, p. 402. Nordmarkite. AL0 3 high. Zr0 2 1.30 Ditro, Siebenburgen, Hungary. Not stated. Y. C. Butureanu, Bui. Soc. Sci. Bukarest, 1897, p. 278. Syenite. Vitosa Mountain, Sofia, Bulgaria. L. Dimitrow. L. Dimitrow, Ds. Wien Akad, LX, p. 493, 1893. Pyroxene-syenite. A1 2 0 3 high. MONZONITE. so :! V.,0 : , BaO SrO 0.26 0.02 0.05 trace Tintic Iron Mine, Tintic district, Utah. H. N. Stokes. Tower and Smith, 19 A. R. U. S. G. S., Ill, p. 661, 1899. Altered monzonite. Cf. Nos. 7 and 8 harzose. Farsund, Norway. C. F. Kolderup. C. F. Kolderup, Berg. Mus. Aarb., 1896, No. 5, p. 124. Quartz-monzonite. Dignaes, Gran, Norway, Damm and L. Schmelck. W. C. Brogger, Q. J. G. S., L., p. 19, 1894. Olivine-gabbro- diabase. MgO, H 2 0, and sum approxi¬ mate. Olivine- monzonite in Eg. Kg., II, p. 49, 1895. PORPHYRY. S 0.29 CuO 0.33 Tamaya, Chile. C. Schwartz. V. Groddeck, Z. D. G. G., XXXIX, p. 250, 1887. Porphyry ? Begon, Entrammes, France. L. Bertrand. A. Michel-Levv, C R CXXII, p. 265, 1896. Albitophyre. Chateau Noir, Grandes Rousses, Dauphiny. Fabre. P. Termier, B. Serv. Cte. G. Fr., YI, No. 40, p. 48, 1894. Qrthophyre. Lac du Cerisier, Grandes Rousses, Dauphiny. Fabre. P. Termier, B. Serv. Cte. G. Fr., VI, No. 40, p. 49, 1894. Orthophvre. Glacier St. Sorlin, Grandes Rousses, Dauphiny. Fabre. P. Termier, B. Serv. Cte. G. Fr., VI, No. 40, p. 48, 1894. Orthophyre. Chateau Noir, Grandes Rousses, Dauphiny. Fabre. P. Termier, B. Serv. Cte. G. Fr., YI, No. 40, p. 49, 1894. Orthophvre. Freney, Grandes Rousses, Dauphiny. Fabre. P. Termier, B. Serv. Cte. G. Fr., YI, No. 40, p. 49, 1894. Orthophyre. Chateau Noir, Grandes Rousses, Dauphiny. Fabre. P. Termier, B. Serv. Cte. G. Fr., VI, No. 40, p. 49, 1894. Orthophyre. Brumun, Hedemark, Norway. H. Backstrom. H. Biickstrom, Bih. Sv. Vet, Ak. Hdl., XVI, Pt. II, No. 3, p. 11, 1888. Rhom ben- porphyry. Varvnejarvi, Teisko, Finland. H. Berghell. J. J. Sederholm, B. Com.. G. Finl., No. 6, p. 68, 1897. Orthoclase- porphyry. 392 CHEMICAL ANALYSES OF IGNEOUS HOCKS PORPHYRY—Continued. No. Si0 2 A1 2 0 3 FeA FeO MgO CaO Na 2 0 K 2 0 h 2 o+ H 2 0- C0 2 Ti0 2 PA MnO Sum Sp. gr. 11 i 65. 77 23. 51 1.95 n. d. 0. 63 trace. 1.44 3. 72 3.35 100.37 A3. III. • I 12 1 50. 38 36. 08 1.36 n. d. 0. 66 0.15 1.32 5.17 4. 40 99. 52 2. 718 A3. III. I 13 i 66. 42 16. 76 1.22 0. 62 0. 37 0. 32 1.26 12. 55 1.05 0.03 0.05 trace 101. 36 2. 56 C2. IV. J 14 1 58. 74 14. 96 n. d. 8. 75 1.59 3. 68 3. 22 3. 60 2. 87 2. 62 100. 03 A4. IV 1 15 1 56. 98 19. 01 n. d. 9. 75 0. 99 3. 60 3. 58 3.91 1.31 1.71 trace 100. 84 B4. V j 16 50. 78 18. 70 7. 28 1.23 o . 33 1.57 1. 83 7. 36 4. 20 0. 23 1.32 0. 22 100.11 C2. V 1 17 \ 49. 68 19.11 8. 45 0. 50 3. 73 0. 33 0. 79 8. 45 7.30 0.05 1.42 0. 21 100.19 C2. V 1 18 46. 96 15.97 1.92 7.35 8. 97 2. 72 1.65 5. 55 5.58 2.14 1.35 0. 26 100. 69 2. 664 A2. II 1 - 19 44.17 13. 49 1.69 7. 75 4. 88 8. 23 1.36 5. 92 3. 43 6. 03 2. 66 0.65 100. 69 2. 743 A2. II 1 20 59. 82 17. 89 4. 43 n. d. 1. 74 3. 81 4. 27 6. 21 2.01 trace 100.18 A4>. IV J KERATOPHYRE. 1 C4. V 1 i 53. 40 20. 82 3. 92 n. d. 1.53 7.05 3. 79 2. 97 V 6. 57 - 100. 05 2 A4. IV 1 67.16 14. 53 4.17 n. d. 0. 41 1.26 5. 55 6.10 1.10 100. 28 3 C4. V | 73. 00 15.61 n. d. 1.95 n. d. 0. 79 4.95 0. 88 1.06 99.00 2. 63 4 A3. Ill j 63. 21 19. 92 1.74 3.29 1.63 0. 78 5. 06 1.42 2.28 0. 63 trace trace 99. 96 5 B3. V j 56. 50 18.14 3.12 2. 86 1 22 3. 38 5.28 1.60 1.26 5.11 0. 85 99. 32 6 C3. V j 79. 36 11.54 0. 63 n. d. n. d. 0. 50 6. 20 0. 51 0. 95 1.35 101. 04 2. 620 7 B4. V | 76.05 14. 75 1.55 n. d. 0.95 0. 07 0.39 3. 26 2. 65 trace 99. 67 2. 702 INFERIOR ANALYSES. 393 PORPHYRY—Continued. Inclusive. Locality. Analyst. Reference. Author’s name. Remarks. Bilsburg, Eder River, Westphalia. Bomer. O. Miigge, N. J. B. B., VIII, p. 568, 1893. Porphyry. Metamor¬ phosed. Dried at 105°. s trace Oberhunden, Westphalia. Bomer. O. Miigge, N. J. B. B., VIII, p. 573, 1893. Porphyry tuff. Altered. Dried at 105°. so 3 0.71 Riidesheim, Rhine, Rh. Prussia. K. Llampe. K. A. Lossen, Jb. Pr. G. L.-A., V, p. 534, 1885. Porphyry. Metamor¬ phosed. Weinberg, Upper Lau- sitz, Prussia. Y. Steger. V. Steger, cf. N. J., 1887, I, p. 42. Porphyry. Weinberg, Upper Lau- sitz, Prussia. V. Steger. V. Steger, cf. N. J., 1887, I, p. 42. Porphyry. so 3 0.06 Geschberg, Bl. Wahlen, Prussia. Boettcher. H. Grebe, Erl. G. Kte. Pr., Bl. Wahlen, p. 33, 1889. A ugi te-o r th 0 ph y r. AI 3 O 3 high. Iron oxides? Not fresh. S03 0.17 Audeborn, Bl. Wahlen, Prussia. Boettcher. H. Grebe, Erl. G. Kte. Pr., Bl. Wahlen, p. 33, 1889. Augite-orthophyr. A1 2 0 3 high. Iron oxides? Not fresh. S03 0.27 ' Pfeffelbach, St. Wendel, Harz Mountains. Hesse. K. A. Lossen, Jb. Pr. G. L.-A., X, p. 316, 1892. Augite-syenite- porphyry. Not fresh. so 3 0.39 Neuwerk, Harz Moun¬ tains. Steffen. K. A. Lossen, Jb. Pr. G. L.-A., VI, p. 213, 1886. Augite-orthophyr- mandelstein. Not fresh. Zalas, n. Cracow, Galicia. R. Zuber. R. Zuber, Jb. Wien. G. R.-A., XXV, p. 745, 1885. Porphyry. KERATOPHYRE. Shelburne Point, Bur¬ lington, Vermont. Morrison. Kemp and Marsters, B. U. S. G. S., 107, p. 20, 1893. Bostonite. Indian Point, Upper Chateaugay Lake, New York. A. S. Eakle. A. S. Eakle, A. G., XII, p. 34, 1893. Bostonite. f S0 3 0.76 Baraboo, Wisconsin. C. F. Austin. « S. Weidmann, B. Un. Wise., Sci. Ser., I, p. 47, 1895. Quartz-keratophyre. Mehaigne, Belgium. A. F. Renard. Vallee-Poussin and Renard, cf. N. J., 1899, II, p. 65. Keratophyre tuff. Lake Maena, Gran, Norway. V. Schmelck. W. C. Brogger, Q. J. E. S., L, p. 26, 1894. Bostonite. Not fresh. Maenaite in Eg. Kg. Ill, p. 207, 1899.. Kupferberg, Wipper- fiirth, Westphalia. Bomer. O. Miigge, N. J. B. B., VIII, p. 606, 1893. Keratophyre. S trace Schameder, Westphalia. Bomer. O. Miigge, N. J. B. B., VIII, p. 667, 1893. Keratophyre tuff. yy4 CHEMICAL ANALYSES OF IGNEOUS ROCKS KERATOPHYRE—Continued. No. 8 B4. V 9 A2. II 10 A4. IV 11 B4. V 12 A4. IV 13 A4. IV 14 D4. V 15 A4. IV 16 04. V 17 C4. V 18 C3. V 19 C3. V 20 B4. V 21 C4. V 22 D4. V 23 C4. V 24 C4. V Si0 2 AIA FeA FeO MgO CaO Na 2 0 K 2 0 | 75. 60 13. 46 3.14 n. d. 0.61 0. 25 0. 79 2. 71 j 73.62 11.87 0 . 66 1.21 0. 87 3.11 0. 37 3.25 | 72. 83 14. 92 2 . 28 n. d. 0.32 2. 07 2. 87 1.46 l 72 - 38 13. 63 2.83 n. d. trace 1.10 3.64 1.37 j- 71. 00 17. 49 2. 55 n. d. 0. 87 0. 25 1.45 3.30 ) • 70.10 P 18. 93 2.62 ii. d. 0. 41 0. 38 2. 75 1.93 J- 65. 53 22. 75 1.79 n. d. 0.18 0 . 26 0. 74 3.16 | 64. 04 20. 98 3.15 n. d. 1.17 0. 39 0. 43 5. 22 | 63.05 25.14 1.23 n. d. 0. 36 0 . 68 5. 79 1.81 4- co GO 32. 70 1.86 n. d. 0 . 20 0.35 1.30 5. 40 j 49. 38 22. 31 3. 60 10.96 3.35 trace 4.16 0.59 j 70.92 14. 62 3. 74 0 . 61 0. 43 1. 75 5. 00 2.38 ^- ✓-' 1 76. 23 15 .11 n. d. 0.12 0 . 60 5. 38 1.90 | 74.92 13. 21 0. 87 n. d. 0. 71 0. 40 4. 92 0 . 66 j 74. 27 13. 59 2. 03 n. d. 1.32 0. 73 4. 66 0 . 81 J 71.39 10.20 6 . 52 n. d. 0. 91 0 . 61 5. 28 2 . 21 J 70. 50 15. 90 1.03 n. d. 1.42 1. 57 4. 90 2. 70 H 2 0+ H 2 0- C 0 2 Ti0 2 P 2 O 5 MnO Sum Sp. gr. 2. 75 99.31 2. 638 2.62 2.42 0 . 06 0. 07 100. 33 2.695 2 . 00 1.23 100. 27 2. 676 1.87 1.23 1.69 99. 74 • 2.651 2. 96 0.15 trace 100 . 02 2.684 2. 70 trace 0. 35 100.17 2 . 662 3. 51 97. 92 2. 711 3.94 trace 0. 38 99. 70 2. 670 2. 30 100. 36 2. 638 4. 22 100. 41 2. 742 4. 50 0. 83 99. 82 2. 740 1.60 - 0. 38 0. 25 101 . 68 1.17 100. 41 3. 57 99. 26 1.42 98. 83 1.94 99. 07 1.21 99. 23 INFERIOR ANALYSES. 395 KERATOPHYRE—Continued. Inclusive. Locality. Analyst. Reference. Author’s name. Remarks. Steimel, Westphalia. Bbmer. 0. Miigge, N. J. B. B., VIII, p. 657, 1893. Keratophyre tuff. S0 3 0.20 Steimel, Westphalia. Gremse. 0. Miigge, N. J. B. B., VIII, p. 651, 1893. Keratophyre tuff. Not fresh. Hofolke, Westphalia. Bbmer. O. Miigge, N. J. B. B., VIII, p. 691, 1893. Keratophyre tuff. S trace Wiebelsaal, Westphalia. Bbmer. 0. Miigge, N. J. B. B., VIII, p. 616, 1893. Ivugel-porpliyr. MnO high. Kromel, n. Schameder, Westphalia. Bbmer. 0. Miigge, N, J. B. B., VIII, p. 668 , 1893. Keratophyre tuff. Steimel, Westphalia. Bbmer. 0. Miigge, N. J. B. B., VIII, p. 651, 1893. Keratophyre tuff. Ziischen, Westphalia. Bbmer. 0. Miigge, N. J. B. B., VIII, p. 676, 1893. Keratophyre tuff. Steimel, Westphalia. Bbmer. 0. Miigge, N. J. B. B., VIII, p. 651, 1893. Keratophyre tuff. Kupferberg, Wipper- fiirth, Westphalia. Bbmer. 0. Miigge, N. J. B. B., VIII, p. 606, 1893. Keratophyre. Al 2 0g high. Siesel, n. Pasel, West¬ phalia. Bbmer. 0. Miigge, N. J. B. B., VIII, p. 622, 1893. Quartz-keratophyre. Altered. AL0 3 high. S 0.14 Kupferberg, Wipper- fiirth, Westphalia. Bbmer. 0. Miigge, N. LB. B., VIII, p. 606, 1893. Spherulitic kerato- phyr. Altered? No CaO? AL0 3 high? Near Premyslan, Moldau Thai, Bohemia. Kolar. J. Klavana, cf. N. J., 1898, I, p. 485. Felsophyrite. Ai'-Danil, Crimea, Russia. A. Lagorio. A. Lagorio, Guide Exc. VII Cong. G. Int., XXXIII, p. 27, 1897. Keratophyre. Monastery St. George, Crimea, Russia. A. Lagorio. A. Lagorio, Guide Exc. VII Cong. G. Int., XXXIII. p. 27. 1897. Keratophyre. Monastery of St. George, Crimea, Russia. A. Lagorio. A. Lagorio, Guide Exc. VII Cong. G. Int., XXXIII, p. 27, 1897. Keratophyre. Seragoz, Crimea, Russia. A. Lagorio. A. Lagorio, Guide Exc. VII Cong. G. Int., XXXIII, p. 27, 1897. Taurite. Cape Parthenit, Crimea, Russia. A. Lagorio. A. Lagorio, Guide Exc. VII Cong. G. Int., XXXIII, p. 27, 1897. Keratophyre. 396 CHEMICAL ANALYSES OF IGNEOUS ROCKS MINETTE. No. Si0 2 A1A Fe 2 O s FeO MgO C’aO Na 2 G k 2 o H 2 0+ h 2 o- co 2 Ti0 2 p 2 o 5 MnO Sum Sp. gr. 1 1 46.11 14. 75 2.20 4.51 5. 73 7. 82 1.29 3.84 2. 90 7.32 0. 84 trace 99. 65 2. 904 A2. II J 2 [ 40. 71 19. 46 7. 46 6 . 83 6 . 21 11.83 1.80 3. 26 1. 53 0. 74 0.18 100 . 01 A3. Ill 3 1 52. 70 15. 07 8.41 n. d. 7.23 5. 33 3.12 4. 81 2. 38 1.71 1 100. 76 A4. IV J 4 i 47. 46 18. 99 8 . 66 n. d. 8 . 78 5.41 1. 72 5. 67 3.37 100 . 06 A4. IV j TRACHYTE. 1 I ' } 65. 76 17.18 trace 2. 30 2 . 22 3.14 5. 60 3.46 99. 66 A4. IV 1 1 65. 56 18. 24 0. 72 2. 58 2 . 08 3.94 6 . 50 1.12 100. 74 - A4. IV I 3 I v 61. 82 19. 86 n. d. 0. 51 1.78 2. 38 1.31 11.47 99.13 C4.V 1 4 l 60. 98 21 . 69 n. d. 1.33 1.83 0 . 80 1.23 11.96 / 99. 82 A4. IV 1 5 ] \ 68. 92 16. 22 trace 1.62 1. 56 4.00 6 . 00 1.60 99. 92 A4. IV 1 6 1 61.15 15. 70 4. 31 1.12 3.04 2.84 1.54 2 . 22 7. 05 0. 69 0. 75 trace 100.59 A2. II I 7 l 56.68 16. 62 6 . 28 n. d. « 0. 79 0.59 1.03 11.18 3. 28 0 . 22 0. 73 1.02 100. 63 A3. Ill J 8 1 66. 21 15. 60 1.95 1. 85 5. 93 1.96 4. 46 3.04 2. 46 103. 46 D3. V J 9 1 64.49 16. 88 6.16 n. d. 3.10 2.45 2.19 3. 89 0.55 trace trace 99. 71 B4. V I 10 1 56. 36 21. 32 7.29 n. d. 2 . 06 5. 07 6.17 3. 65 n. d. 101. 92 D4. V j 11 | 58. 32 20 . 88 4.15 n. d. 1.10 2.19 4.11 3. 91 5. 87 100. 53 A4. IV 1 12 i 58.15 23. 23 1.46 n. d. trace 2. 40 6 . 93 6 . 63 1.72 100.52 B4. V J 13 1 66 . 74 16. 91 1.95 0 . 62 0.15 1.19 6 . 55 4.11 2 . 08 0. 53 0 . 08 101. 41 C2. IV J * 14 1 61. 01 18.45 2. 09 0 . 80 ; 0.94 1.91 7.33 4. 75 3. 09 0.45 trace 101. 25 2. 562 C2. IV J 1 20° INFERIOR ANALYSES. 397 MINETTE. Inclusive. Locality. t Analyst. Reference. Author’s name. SRemarks. X 0.97 S 1.37 Hull’s Cove, Conanicut Island, Rhode Island. L. Y r . Pirsson. L. Y. Pirsson, A. J. S., XLYI, p. 375, 1893. Minette. Not fresh. Franklin Furnace, Sus¬ sex County, New Jersey. L. G. Eakins. J. P. Iddings, B. U. S. G. S., 150, p. 238, 1898. Minette. Probablyinetin- dase, if Ti0 2 and P 2 0 5 were determined. Weissenburg, Weiler, Elsass. G. Linck. G. Linck, Abh. G. Kte. E.-L. Ill, Pt. I, p. 55, 1884. Minette. Kapelle, Weiler, Elsass. G. Linck. G. Linck, Abh. G. Kte. E.-L. Ill, Pt. I, p. 57, 1884. Minette. TRACHYTE. Devil’s Pathway, Montana. J. E. Whitfield. G. P. Merrill, A. J. S., XXXII, p. 202, 1886. Trachyte-obsidian dust. Little Sage Creek, Montana. J. E. Whitfield. G. P. Merrill, A. J. S., XXXII, p. 202, 1896. Trachyte-obsidian dust. Bozeman, Montana. F. W. Clarke. A. C. Peale, B. U S. G. S., 148, p. 141, 1897. Volcanic dust. Fort Ellis, Montana. F. W. Clarke. A. C. Peale, B. U. S. G. S., 148, p. 141, 1897. Volcanic dust. Marsh Greek Valley, Idaho. J. E. Whitfield. G. P. Merrill, 4 J S XXXII, p. 202, 1896. Trachyte-obsidian dust. S0 3 LioO 0.18 none TwoOceanPass, Yellow¬ stone National Park. J. E. Whitfield. J. P. Iddings, B. U. S. G. S., 148, p. 132, 1897. Trachyte tuff. FeSo CuO 2.21 trace Los Cerillos, New Mexico. F. W. Clarke. Diller and Clarke, B. U. S. G. S., 42, p. 43, 1887. Trachyte. Not fresh. Puente del Inca, Cord, de Mendoza, Argentina. R. Muller. A. Stelzner, Btr. G. Arg. Rep., I, p. 183, 18S5. Trachyte. Sum high. Newtownhead, County Waterford, Ireland. Jones and Rob¬ inson. F. R. C. Reed, Q. J. G. S., LYI, p. 686, 1900. Trachyte. Alkalies low. La Quenille, Mount Dore, Auvergne. E. Bonjean. E. Bonjean, C R XXVIII, p. 1097, 1899. Trachyte. Bruhl Thai, Laacher See, Rhenish Prussia. W. Bruhns. W. Bruhns, cf. N. J., 1892, II, p. 418. Trachyte pumice. Not fresh. Laacher See, Rhenish Prussia. W. Bruhns. W. Bruhns, ■ cf. N. J., 1892, II, p. 418. Trachyte pumice. AL0 3 high? X SO., SrO Li 2 0 0.40 0.10 trace trace Block in Tuff, Dachberg, Rhongebirge. Knoevenagel. F. Rinne, Jb. Pr. G. L-A., VII, p. 20, 1887. Soda-trachvte (?) X so, LuO 0.40 0.03 trace Block in Tuff, Dachberg, Rhongebirge. Deicke. F. Rinne, Jb. Pr. G. L-A., VII, p. 21, 1887. Soda-trachyte (?) 58 70 17 80 20 80 30 22 26 36 97 44 76 65 38 34 17 , 18 68 CHEMICAL ANALYSES OF IGNEOUS ROCKS TRACH YTE—Continued. A1A ; Fe 2 O s i FeO MgO CaO Na,0 KjO 1 h 3 o+ H 2 0— C0 2 TiO, P2O5 MnO Sum Sp. gr. 21. 85 4. 87 n. d. 0 . 68 1.89 3.51 5.02 8 . 47 none 100. 87 19. 70 9.20 n. d. 1.20 1.92 2.40 4.53 0. 99 trace 100.64 17.40 10.20 n. d. trace 3. 55 4.64 0. 43 trace 100. 59 2 . 666 18. 30 7.10 n. d. trace 4.30 4. 47 3.50 1.85 trace 99. 32 2. 509 21.40 8.60 n. d. trace 4. 50 6 . 22 1.42 trace 100.34 20 . 00 10 . 80 n. d. trace 5. 22 3.00 5.20 0. 58 100 . 60 20 . 75 n. d. 1.05 2. 63 2. 75 4. 60 0.34 99. 42 2. 541 16. 26 1.41 3.84 1.25 4. 75 2. 42 4.18 1.87 1.07 trace 100. 27 2. 481 16. 05 1.04 6.13 1.29 5.50 1.62 3.18 1.57 0.51 0.14 100.29 2.416 27. 27 n. d. 3.16 n. d. 3. 99 1.11 1. 65 3. 38 0.14 100 . 06 17. 65 0. 63 7. 50 1.71 5. 53 1. 50 5.31 1.82 0. 42 0. 09 100.13 2.451 18. 60 2. 09 4. 48 4. 75 6 . 76 _ 1.79 6 . 63 0.25 0.16 trace 100. 75 2. 700 20 . 08 4.46 n. d. trace 2.07 5. 70 6 . 31 1.37 100. 75 17. 82 4.46 * n. d. 0.61 2. 35 5.95 7.29 n. d. 99.01 18. 40 4.33 n. d. 0. 57 2.24 5.42 6 . 68 0.24 trace 0. 38 98. 48 18.48 4. 59 n. d. 0. 77 2.54 5.12 6 . 75 n. d. 0.19 0. 31 98. 90 18. 65 4. 50 n. d. 0. 59 2 . 62 4. 82 7.12 0 . 81 0 . 20 98. 65 18. 29 4. 63 n. d. 0.68 2.47 5. 27 6 . 93 0. 25 0. 27 97. 87 22.15 4. 74 n. d. 1.42 2. 04 12 . 06 n. d. 0.12 trace 101.06 2.613 INFERIOR ANALYSES. 399 TRACHYTE—Continued. Inclusive. Cl trace Cl 0.88 Cl - 0.84 Cl 0.81 Cl 0.17 Cl 0.89 Cl 0.85 Locality. Analyst. Reference. Author’s name. Remarks. Schiffenberg, Giessen, Hesse. F. Roth. F. Roth, cf. N. J., 1892, II, p. 418. Trach y te-pumice. Not fresh. Fintaer Straz, Eperies Mountains, Hungary. Steiner. S. Roth, F. K., XIV, p. 533,1884. Amphibole- trachyte. AljjOg high or alkalies low? Krivi Javor, Eperies Mountains, Hungary. Steiner. S. Roth, F. K., XIV, p. 540,1884. Ainphibole- trachyte. No MgO? Klauzura, Eperies Mountains, Hungary. Steiner. S. Roth, F. K., XIV, p. 544,1884. Amphibole- trachyte. No MgO? Josefstollen, Dubnik, Hungary. Steiner. S. Roth, F. K., XIV, p. 547,1884. Augite-trachyte. A1,0 3 high. Alkalies not separated. No MgO? Sosufalu, Eperies Mountains, Hungary. Steiner. S. Roth, F. K„ XIV, p. 541,1884. Augite-trachyte. A1A high. No MgO? Monte Amiata, Tus¬ cany, Italy. A. Lagorio. A. Lagorio, T. M. P. M., VIII, p. 458, 1887. Trachyte. Alkalies low? Torre Alfina, Lake Bol- sena, Italy. L. Riceiardi. C. Klein, Sb. Berl. Akad., 1888, p. 93. Olivine-trachyte. Alkalies low. Calc, with 19.4 per cent quartz. San Lorenzo, Lake Bol- sena, Italy. L. Riceiardi. C. Klein, Sb. Berl. Akad., 1888, p. 93. Olivine-trachyte. Alkalies low. Calc, with 23.3 per cent quartz. Valle Vidona, n. Lake Bolsena, Italy. L. Riceiardi. C. Klein, Sb. Berl. Akad., 1888, p. 101. Trachyte tuff. A1 2 0 3 high. Alkalies low. Bolsena, Italy. L. Riceiardi. C. Klein, Sb. Berl. Akad., 1888, p. 97. Trachyte. Alkalies low. Cf. No. 1, vul- sinose. Fontana Fiescoii, Viterbo, Italy. H. S. Washington. H. S. Washington, J. G., IV, p. 837, 1896. Ciminite. Al,Oo high and MgO low. Cf. No. 5, cim- inose. Proeida Island, Bay of Naples, Italy. A. Lagorio. A. Lagorio, T. M. P. M., VIII, p. 475, 1887. Obsidian. A1 2 0 3 high. Below St. Elmo, Naples, Italy. G. Freda. G. Freda, cf. N. J., 1892, II, p. 255. Trachyte scoria. Monte Santo, Naples, Italy. G. Freda. G. Freda, cf. N. J., 1892, II, p. 255. Trachyte. Rione Amedeo, Naples, Italy. G. Freda. G. Freda, cf. N. J., 1892, II, p. 255. Trachyte. Rione Amedeo, Naples, Italy. G. Freda. G. Freda, cf. N. J., 1892, II, p. 255. Trachyte. Monte Santo, Naples, Italy. G. Freda. G. Freda, cf. N. J., 1892, II, p. 255. Trachyte. Sant’ Elmo, Naples, Italy. L. dell’ Erba. L. dell’ Erba, cf. B. Com. G. Ital., XXII, p. 105, 1891. Sanidinite. 400 CHEMICAL ANALYSES OF IGNEOUS ROCKS TRACHYTE—Continued. No. 34 A4. IV 35 B4. V 3(5 B4. V 37 C4. V 38 D4. V 39 A3. Ill 40 C3. V 41 C4. V 42 C4. V 43 C4. V Si0 2 ai 2 o 3 Fe,0 3 FeO MgO CaO Na,0 K 2 0 H 2 0+ H 2 0— co 2 Ti0 2 PA MnO Sum Sp. gr. i 1 59.48 |1 16. 87 8 . 55 n. d. 2.30 5.29 3. 79 3. 85 n. d. $ 100.13 l 71. 5 16 .9 n. d. 0.3 1.2 6 . 5 2.8 99.6 | 60.2 10.2 ‘ 11.9 n. d. 2.9 6.1 6.0 3.1 n. d. 100.2 j 61.49 20 . 82 5. 03 n. d. 0. 51 1.98 3.10 7.03 n. d. 0. 03 0 . 01 100.0 1 65. 5 20.0 5.0 n. d. 2.6 0.7 0.4 7.0 0.8 trace 102.0 r j 63. 63 17.99 5.84 trace none 4.21 4. 25 3. 81 0.15 0. 69 100. 57 2. 307 (pow¬ der) j 70.34 10.13 0. 56 4. 02 1.74 5.18 5. 01 2 . 06 2.14 101.18 2. 525 J 61. 38 20 . 60 2. 57 n. d. 0. 40 2.18 9. 70 none 1.98 1.19 100 . 00 2. 590 j 60.69 17. 75 3. 83 n. d. 1.43 1.20 13.10 trace 0. 79 1.21 100 . 00 J 52.18 20 . 00 5.00 n. d. 1.03 4. 92 14. 57 2.30 n. d. 100 . 00 NEPHELITE-SYENITE. 1 1 50. 36 19.34 6 . 94 n. d. n. d. 3. 43 7* 64 7.17 3. 51 0. 41 98. 80 D4. V 1 2 52.10 19. 86 5. 94 n. d. 2.35 0. 25 7. 82 10. 05 1.43 99. 80 A4. IV J 3 ] • \ 54.17 23. 25 0.69 2. 95 0. 48 2 . 02 6 . 33 6.19 0.17 1.14 0. 98 0.16 98. 53 D2. V J 4 l 52. 03 22.34 1.13 1.63 0. 67 2. 09 8.44 5.16 1.79 1.32 0.99 0. 41 98. 00 D'2. V 1 5 1 55. 41 19.84 9.50 n. d. n. d. 3. 86 5. 97 5.29 n. d. 99. 87 B4. V J INFERIOR ANALYSES. 401 TRACHYTE—Continued. J Inclusive. Locality. Analyst. Reference. Author’s name. Remarks. Grotta dei Palizzi, Vul- cano Island, Italy. Heidepriem. A. Bergeat, Abh. Munch. Ak., XX, p. 166, 1899. Olivine-trachyte. % Capo Rosso, San Pjetro, Sardinia. S. Bertolio. S. Bertolio, B. Com. G. Ital., XXV, p. 418, 1894. Trachyte. Acqua Fredda, Siliqua, Sardinia. S. Bertolio. S. Bertolio, B. Soc. G. Fr., XXIII, p. 454, 1895. Trachyte. Golabara River, Servia. A. B. Griffiths. A. B. Griffiths, Q. J. G. S., XLII, p. 566, 1886. Trachyte. San Miguel, Azores Islands. S. Traverso. S. Traverso, Gior. Min., Y, p. 197, 1894. Augitic trachyte. Bondi, Sydney, New South Wales. A. Liversidge. A. Liversidge, J. R. Soc. N. S. W., XX, p. 235, 1887. Pumice. Floated block. Tawheterangi, Hauraki Penins, New Zea¬ land. W. A. McLeod. W. A. McLeod, Tr. N. Z. Inst., XXXI, p. 490, 1899. Hornblende- trachyte. “Silicified?” Lyttleton Crater, New Zealand. Geological Sur¬ vey of New Zealand. H. Filhol, III, p. 115, 1885. Soda-trachyte. Alkalies? Lyttleton Crater, New Zealand. Geological Sur¬ vey of New Zealand. H. Filhol, III, p. 115, 1885. Soda-trachyte. Alkalies? Lyttleton Crater, New Zealand. Geological Sur¬ vey of New Zealand. H. Filhol, III, p. 115, 1885. Soda-trachyte. Alkalies? N EPHELITE-S YENITE. Beemerville, Sussex County, New Jersey. F. W. Love. J. F. Kemp, Tr. N. Y. Acad., XI, p. 65, 1892. Nephelite-syenite. Complete in separate. !’<)(;oh de Caldas, Minas Geraes, Brazil. J. Machado. J. Machado, T. M. P. M., IX, p. 342, 1888. Nephelite-syenite. Calculated from two partial analyses. Mount Wichniowaia, East Urals, Siberia. Bourdakow. A. Karpinsky, Guide Ex c. VII Cong. G. Int., V, p. 22, 1897. Miascite. Cf. No. 38, miaskose. Lake Ilmen, Siberia. Bourdakow. A. Karpinsky, Guide Exc.VII Cong. G. Int., V, p. 22, 1897. Miascite. Cf. No. 38, miaskose. Alibert’s Graphite Mine, Botolgolskij-Golez, Siberia. Alexejew. L. Jaczewski, cf. N. J., 1901, II, p. 75. Nephelite-syenite. Contains graph¬ ite. 14128—No. 14—03 26 402 CHEMICAL ANALYSES OF IGNEOUS ROCKS PHONOLITE. No. 1 A4. IV 2 A4. IV 3 A4. IV 4 B4. V 5 A4. IV 6 A4. IV 7 A4. IV 8 A4. IV 9 A4. IV 10 A4. IV 11 Al. I 12 A4. IV 13 C4. IV 14 D4. V 15 D3. V 16 B2. Ill 17 D3. V 18 B3. IV 19 A4. IV 20 C2. IV Si0 2 A1A Fe 2 0 3 FeO MgO CaO Na 2 0 K 2 0 h 2 o+ h 2 o- CO, Ti0 2 ■PA MnO Sum Sp. gr. j 44. 50 22. 96 6 . 84 n. d. 1. 65 8.65 6 . 70 4. 83 2 . 06 1.40 99.59 | 58.98 16. 03 n. d. 8.27 trace 1.11 8 . 28 4. 90 2. 07 0. 51 100.15 j 58. 94 18.11 n. d. 6 . 31 trace 0.57 7. 56 6 . 87 1.36 0. 09 99. 81 J 58. 65 16.45 4. 08 n. d. trace 3. 78 8 . 92 4.16 2 . 78 0. 29 99.11 | 58. 58 17.19 n. d. 7. 69 none 0 . 88 9. 26 4.54 1.65 0. 09 99. 78 | 58. 56 18.14 n. d. 7. 32 none 1.56 8 . 49 5.28 1.01 0.12 100. 48 j 58. 38 20. 40 n. d. 4. 42 trace 1.56 6 . 23 6 . 26 2. 70 0. 50 100. 45 | 57. 45 20. 38 n. d. 3. 63 trace 1.84 7. 41 6.19 2.76 0. 36 100 . 02 j 56. 34 21.06 n. d. 4.21 0. 71 3. 34 9. 27 4. 08 I 0. 90 0.07 99.98 | 55.60 19. 71 n. d. 5.49 0 . 86 1. 69 8 . 60 4. 88 2. 89 0.34 100.06 J 56. 74 20. 30 1.06 none 0. 23 0. 57 0 . 62 13. 36 1.15 0. 33 0. 58 0. 25 none 100.10 J 61.3 21.2 n. d. 3.9 0.7 0.2 10.2 2.7 n. d. 100.2 2 . 60 | 58. 70 22. 36 5. 08 n. d. 1.27 3. 39 5.13 5. 45 n. d. trace 101.38 J 54.97 25. 84 6 . 29 n. d. 1.13 5. 21 4.49 3. 52 n.d. trace 101. 45 | 55.90? 22. 70 4. 20 n. d. 0. 96 1. 25 9. 20? 6 . 78 0. 87 0. 37 102.23 J 53.33 21. 33 2 . 66 1. 75 0. 63 1.44 10. 34 6.13 0 . 88 0. 40 1.15? 100. 04 | 53.09 23. 81? 3. 92 n. d. 1.13 1.29 10. 41 6 . 31 0. 67 0. 29 0. 42 101. 34 | 53. 21 22 . 02. 4.18 li. <1. 0.91 1. 33 10. 37 6 . 41 0 . 81 0. 35 0.42 100.01 J 52.24 21.08 4.41 n. d. 0 . 60 . 2.68 4. 58 6 . 43 8 . 33 100. 43 | 57. 69 20.44 2. 32 1.47 0. 70 3.18 7. 51 4. 74 1.70 0. 42 0 . 66 trace 101.79 2. 624 INFERIOR ANALYSES. 403 PHONOLITE. Inclusive. Locality. Analyst. Reference. Author’s name. Remarks. Dr. Thornton’r, Magnet Cove, Arkansas. W. A. Noyes. J. F. Williams, A. R. Akr. G. S. 1890, II, p. 261, 1891. Nephelite-por- phyry. Annie Creek, Black Hills, South Dakota. Flintermann. J. D. Irving, Ann. N. Y. Acad., XII, p. 272, 1899. Phonolite. Annie Creek, Black Hills, South Dakota. Flintermann. J. D. Irving, Ann. N. Y. Acad., XII, p. 272, 1899. Phonolite. Calamity Gulch, Black Hills, South Dakota. J. D. Irving. J. D. Irving, Ann. N. Y. Acad., * XII, p. 272, 1899. Phonolite. . Annie Creek, Black Hills, South Dakota. Flintermann. J. D. Irving, Ann. N. Y. Acad., XII, p. 272, 1899. Phonolite. 1 Annie Creek, Black Hills, South Dakota. Flintermann. J. D. Irving, Ann. N. Y. Acad., XII, p. 272, 1899. Phonolite. Annie Creek, Black Hills, South Dakota. Flintermann. J. D. Irving, Ann. N. Y. Acad., XII, p. 272, 1899. Phonolite. Whitetail Gulch, Black Hills, South Dakota. Flintermann. J. D. Irving, Ann. N. Y. Acad., XII, p. 272, 1899. Phonolite. Squaw Creek, Black Hills, South Dakota. Flintermann. J. D. Irving, Ann. N. Y. Acad., XII, p. 272, 1899. Phonolite. Annie Creek, Black Hills, South Dakota. Flintermann. J. D. Irving, Ann. N. Y. Acad., XII, p. 272, 1899. Phonolite. ZrO<. FeSo BaO SrO LioO 0.07 4.65 0.19 trace trace Victor, Cripple Creek, Colorado. W. F. Hillebrand. W. C. Cross, B. U. S. G. S., 148, p. 162, 1897. Altered phonolite. Megal, Velay, France. M. Boule. M. Boule, B. Serv. Cte. G. Fr., IV, No. 28, p. 152, 1892. Phonolite. SO* trace Roc Blanc, Mount Dore, Auvergne. E. Bonjean. E. Bonjean, C R CXxVlII, p. 1097, 1899. Phonolite. La Malvialle, Mount Dore, Auvergne. E. Bonjean. E. Bonjean, ( 1 R CXXVIII, p. 1097, 1899. Phonolite. Foia, Serra de Monchique, Portugal. Student of P. Jannasch. Kraatz-Koschlau and Hackman, T. M. P. M., XVI, p. 257, 1896. Tinguaite-porphyry. Sum high. Si0 2 and Na 2 0 doubtful. Foia, Serra de Monchique, Portugal. Student of P. Jannasch. Kraatz-Koschlau and Hackman, T. M. P. M., XVI, p. 257, 1896. T inguaite-porphyry. MnO doubtful. Na.,0 high? Foia, Serra de Monchique, Portugal. Student of P. Jannasch. Kraatz-Koschlau and Hackman, T. M. P. M., XVI, p. 257, 1896. Tinguaite- porphyry. A1 2 0 3 doubtful. Sum high. Foia, Serra de Monchique, Portugal. Students of P. Jannasch. Kraatz-Koschlau and Hackman, T. M. P. M., XVI, p. 257, 1896. Tinguaite- porphyry. Mean of 3 above, doubtful de¬ terminations omitted. SO :t Cl trace 0.08 Schorenberg, Eifel, Rh. Prussia. K. Busz. K. Busz, Vh. Nh. Ver. Bonn., XLVIII, p. .254, 1891. Phonolite tuff. X S0 3 Cl 0.34 0.27 0.35 Linsberg, Rhongebirge. E. Mdller. E. MSller, N. J. 1888, I, p. 97. Phonolite. 404 CHEMICAL ANALYSES OF IGNEOUS ROCKS PHONOLITE—Continued. No. 21 B-l. V 22 B4. Y 23 B4. V 24 B4. V 25 C4. V 26 B4. V 27 D4. Y 28 D4. V 29 C3. V 30 C4. V 1 A4. IV 2 A4. IY 3 B4. V 4 B4. V 5 A4. IY 6 B4. Y 7 D3. V Si0 2 AlA Fe 2 0 3 FeO MgO CaO Na./) K 2 0 H 2 0+ HjO— co 2 TiO, PA MnO Sum Sp. gr. | 56. 72 21.04 n. d. 4. 63 1.13 4.13 • 4.33 6 . 28 1.74 100.00 j 56. 47 18. 66 n. d. 5. 83 trace 4. 79 7. 81 4. 87 100 . 00 j 52. 03 20 . 00 n. d. 5. 90 1.52 4. 42 9.30 5. 22 1. 32 0 . 22 99. 93 | 50. 70 20. 32 n. d. 4. 51 2. 09 3.58 5. 05 6 . 23 5. 68 100 . 00 I 50.69 J 21.85 n. d. 4.51 0. 25 . 7. 77 11.28 2. 83 0 . 82 100.00 | 50. 66 21.18 n. d. 5. 42 2.65 7. 72 5. 06 , 3. 77 2.15 0. 25 100 . 00 j 49. 69 21.05 n. d. 5. 05 1.45 8 . 90 4. 22 1.33 5. 23 1.35 trace 98. 68 j 52. 85 15. 50 11.70 n. d. 4. 58 7. 56 n. d. 7.54 n. d. * 102. 73 J 58. 23 20 . 90 3. 21 1. 75 0. 39 3.24 6.16 5. 88 1.60 trace 101. 36 j 51.15 29. 38 n. d. 0.34 4.59 13. 80 0. 95 100 . 21 LEUCITE-TRACHYTE, ETC. f j 50. 96 19. 67 7. 76 n. d. 0.36 4. 38 7. 96 6 . 77 1.38 0. 52 100.01 j 52.16 20.14 6 . 45 n. d. 1.54 4.64 5. 73 8.12 1.39 trace trace 100.17 j 55. 22 23. 34 2.16 n. d. 0. 36 2.25 3.14 5. 72 8 . 76 101. 09 J 53. 25 24. 20 337 n. d. trace 1.03 5. 73 5. 48 6 . 64 99. 70 j 50. 95 21. 43 3. 50 n. d. trace 4. 87 6 . 81 6.66 10 . 20 100. 46 | 52.33 21.42 n. d. 8.14 1.97 7.88 4. 97 2. 57 0. 72 100 . 00 | 59. 69 16. 22 1.93 8.17 2. 72 4. 80 1.03 3.09 1.54 trace 0. 44 100. 27 INFERIOR ANALYSES. 405 PHONOLITE—Continued. Inclusive. Locality. Analyst. Reference. Author’s name. Remarks. Kirchberg, Kaiserstuhl, Baden. A. Knop. A. Knop, D. Kaiserstuhl, Leipzig, 1892, p. 221. Phonolite. Not fresh. Recalc, to 100, after deduct¬ ing 3.36 IIjO and 4.56 Ca 2 C0 3 . Endhalde, Kaiserstuhl, Baden. A. Knop. A. Knop, I). Kaiserstuhl, Leipzig, 1892, p. 235. Phonolite. Not fresh. Recalc, to 100, after ignition and deducting 6.82 C0 2 . Eichwalde, Kaiserstuhl, Baden. A. Knop. A. Knop, D. Kaiserstuhl, Leipzig, 1892, p. 225. Hauyne-phonolite. Ignited before analysis. S0 3 not deter¬ mined. FeS 2 1.84 Schelingen, Kaiserstuhl, Baden. A. Knop. A. Knop, D. Kaiserstuhl, Leipzig, 1892, p. 239.' Phonolite. TiO a high. Not fresh. 4.16 II 2 0 and 6.27 CaCO s de¬ ducted. Oberschaff hausen, Kaiserstuhl, Baden. A. Knop. A. Knop, D. Kaiserstuhl, Leipzig, 1892, p. 232. Natrolite-phonolite. Not fresh. 6.74 H 2 0 and 2.00 CaC0 3 de¬ ducted. S0 3 1.14 Herberig, Kaiserstuhl, Baden. A. Knop. A. Knop, D. Kaiserstuhl, Leipzig, 1892, p. 218. Phonolite. Not fresh. 6.35 H 2 0 and 3.07 CaC0 3 de- ducted. so 3 Cl 0.41 none •Herberig, Kaiserstuhl, Baden. H. Kohler. A. Knop, D. Kaiserstuhl, Leipzig, 1892, p. 224. Hauyne-phonolite. Sum low. Not fresh. Le Braidi, Monte Vulture, Italy. Musaio. Cf. W. Deecke, N. J. B. B., VII, p. 602, 1891. Phonolite. Greenland Harbor, Kerguelen Island, South Atlantic. C. Klement. A. Renard, Challenger Reports, Petr. Oc. Islands, p. 136, 1889. Phonolite. Purakanui Cliffs, n. Dunedin, New Zealand. Allen and Fitz¬ gerald. G. H. F. Ulrich, Tr. Aust. A. A. S.. Ill, p. 136, 1891. Tinguaite? LEUCITE-TRACHYTE, ETC. SO 3 Cl trace 0.25 Diamond Jo Quarry, Magnet Cove, Arkansas. \V. A. Noyes. J. F. Williams, A. R. Ark. G. S., 1890, II, p. 276, 1890. Leucite-syenite. Serra de Caldas, Sao Paolo, Brazil. F. W. Dafert. E. Hussak, N. J., 1892, II, p. 149. Leucitophyre. S0 3 Cl trace 0.14 Bell, Laacher See, Rh. Prussia. K. Busz. K. Busz, Vh. Nh. Ver. Bonn., XLVIII, p. 265, 1891. Leucitophy re¬ pumice. Not fresh. A1 2 0 3 high? Cl trace Rieden, Laacher See, Rh. Prussia. K. Busz. K. Busz, Vh. Nh. Ver. Bonn., XLVIII, p. 246, 1891. Leucite-phonolite pumice. Not fresh. A1 2 0 3 high? Cl trace Rieden, Laacher See, Rh. Prussia. K. Busz. K. Busz, Vh. Nh. Ver. Bonn., XLVIII, p. 244, 1891. Leucitophyre pumice. Not fresh. Oberrothweil, Kaiserstuhl, Baden. A. Knop. A. Knop, D. Kaiserstuhl, Leipzig, 1892, p. 229. Leucite-phonolite. Not fresh. 7.00 H 2 0 and 4.30 CaC0 3 deducted? so 3 Cl 0.04 trace Proceno, n. Lake Bolsena, Italy. L. Rieciardi. C. Klein, Sb. Berl. Akad., 1888, p. 113. Leucite-phonolite. Alkalies low calc, with 21.5 quartz. 406 CHEMICAL ANALYSES OF IGNEOUS ROCKS QUARTZ-DIORITE. No. Si0 2 A1 2 0 3 Fe,0 3 FeO MgO CaO Na 2 0 K z O h 2 0 + H,0— C0 2 TiO^ 1*2^5 MnO Sum Sp. gr. 1 A4. IV j 56. 69 15. 48 6 . 22 n. d. 6.53 7.59 3. 41 3.43 n.d. 0 . 62 99. 97 2 A4. IV | 56.18 22 79 n. d. 6 . 53 6 .49 3. 40 3. 27 n.d. 1.60 100 . 26 3 D4. V j 57.50 23.44 5.07 n.d. 2. 76 5.62 2 . 01 0. 45 2. 25 w 2 . 02 101.12 2. 856 4 • Al. I | 60.26 15. 73 1.25 2.68 1.82 5.44 1.92 3.71 2. 54 0. 33 3. 99 0. 42 0.12 0. 04 100. 40 5 Al. I | 59.76 14. 45 1.04 3. 52 2 . 26 6 . 09 1.12 3. 73 2. 58 0 . 26 4.47 0. 46 0.16 0. 09 100 . 28 6 Al. I J 58. 43 17.40 0. 77 2.19 1.50 5.25 1. 76 4. 03 2.61 0. 30 4.04 none 0.13 none 100 . 00 '7 Al. I j 56. 25 17. 65 0. 76 2.64 1.69 4. 46 0. 30 6 . 01 2. 36 0. 30 4. 82 0. 25 0 . 21 none 100 . 60 8 Al. I | 46.13 15. 82 0. 89 2. 27 2.13 10 . 68 0.17 5. 30 2. 42 0.12 11.24 0. 67 0.10 0. 09 99. 68 9 A3. Ill | 68 . 99 20. 29 2.10 1.62 0. 40 4. 75 0.15 0. 09 0.14 1.10 trace trace none 99. 63 10 A2. II J 57. 96 17. 43 0. 45 1.82 2.34 5. 07 5.17 0. 45 1.04 6 . 32 1.21 0 . 02 none 99.61 11 A4. IV J 65. 20 16. 25 5. 45 n.d. 1.87 7. 55 2. 87 0.50 0. 65 100. 34 12 A4. IV J 64. 35 15. 46 7. 50 n.d. 0.50 3. 58 3.28 3.54 n.d. 1.63 99. 84 13 A4. IV J 64. 02 20. 45 2. 85 n.d. 1.28 4.51 3. 34 3. 54 n.d. 99. 59 14 D3. V | 65. 73 16. 20 2 . 66 1.68 1.28 3.12 4.12 1.89 1.47 98.15 15 A4. IV j 62. 80 12. 94 10. 57 n.d. 2. 79 4. 99 2. 52 1.27 1.13 1.10 100.11 16 C2. IV 17 C4. V j 56.45 20.15 4. 36 5.00 2 . 66 6 . 59 2. 95 1.00 1.61 trace 0. 24 trace 101 . 01 j 62. 22 23 29 n. d. 3. 22 6 . 21 2. 69 1.27 0.14 99.04 18 A4. IV j 56. 61 15.55 12 . 66 n. d. 2. 07 5.90 3.15 1. 07 3. 50 100.51 19 C4. V J 56.17 16. 50 10.60 n. d. 2 . 21 6 . 97 2. 94 0. 75 3. 01 99.15 INFERIOR ANALYSES. 407 QUARTZ-DIORITE. Inclusive. Locality. Analyst. Reference. Author’s name. Remarks. Three Rivers, Belcher- town, Massachusetts. W. Orr, jr. B. K. Emerson, M. U. S. G. S., XXIX, p. 336, 1898. Tonalite. Three Rivers, Belcher- , town, Massachusetts. F. H. Fitts. B. K. Emerson, M. U. S. (7. S., XXIX, p. 336, 1898. Tonalite. Stop Island, Rainy Lake Region, Ontario. F. T. Shutt. A. C. Lawson, A. G., VII, p. 158, 1891. Quartz-diorite. Center of dike. A1 2 0 3 high. FeS., BaO SrO Li.,0 0 . 0 s 0.07 trace trace Providence Mine, Nevada County, California. W. F. Hillebrand. W. Lindgren, 17 A. R. U. S. G. S., II, p. 149, 1896. Altered granodio- rite. Cf.No.34,yellow- stonose, and No. 11, harzose. FeSo BaO SrO Li 2 0 0.24 0.05 trace? trace Providence Mine, Nevada County, California. W. F. Hillebrand. W. Lindgren, 17 A. R. U. S. G. S., II, p. 149, 1896. Altered granodio- rite. Cf.No.34,yellow- stonose, and No. 11, harzose. S0 3 FeS., BaO" none 1.59 none Empire Mine, Nevada County, California. G. Steiger. W. Lindgren, 17 A. R. U. S. G. S., II, p. 149, 1896. Altered granodio- rite. Cf. No.34,yellow- stonose, and No. 11, harzose. so 3 FeS 2 BaO" none 2.87 0.03 Bellefountain Tunnel, Nevada County, California. G. Steiger. W. Lindgren, 17 A. R. U. S. G. S., II, p. 149, 1896. Altered granodio- rite. Cf. No.34,yellow- stonose, and No. 11, harzose. S0 3 FeSo NiO' ZnO BaO SrO 0.04 1.61 trace trace trace trace Ophir, Placer County, California. W. F. Hillebrand. W. Lindgren, 14 A. R. U. S. G. S., II, p. 275, 1894. Altered granodio- rite. Cf. No. 59, ton- alose. S trace Smith’s Post Island, Essequibo River, British Guiana. J. B. Harrison. J. B. Harrison, Rep. G. Ess. River, p. 45, 1900. Quartz-diorite. Decomposed. FeSo 0.33 Omai, Essequibo River, British Guiana. J. B. Harrison. J. B. Harrison, Rep. G. Ess. River, p. 45, 1900. Quartz-diorite. Decomposed. • Monte Santo, Sao Paolo, Brazil. J. Machado. J. Machado, T. M. P. M., IX, p. 355, 1888. Quartz-augite- diorite. Dypvik, Farsund, Norway. C. F. Kolderup. C. F. Kolderup, Berg. Mus. Aarb., 1896, No. 5, p. 123. Banatite. Ivockenhus, Kullen, Sweden. A. Hennig. A. Hennig, cf. N. j:, 1900, I, p. 224. Banatite. A1A high? Rino, Yal Camonica, Piedmont. C. Riva. C. Riva, Att. Soc. Ital. Milano, XXXVI, p. 146, 1896. Quartz-diorite. Mesoncles, Valsava- ranche, Piedmont. G. Aichino. V. Xovarese, B. Com. G. Ital., XXV, p. 286, 1894. Quartz-diorite. Ivrea, Piedmont. L. van Wervecke. F. R. Van Horn, T. M. P. M., XVII, p. 407, 1898. Quartz-hypersthene- diorite. A1A high? Kamary, Crimea, Rus¬ sia. A. Lagorio. A. Lagorio, Guide Exc. VII, Cong. G. Int., XXXIII, p. 27, 189L Quartz-diorite. Aiou Dag, Crimea, Rus¬ sia. A. Lagorio. A. Lagorio, Guide Exc. VII, Cong. G. Int., XXXIII, p. 27, 1897. Quartz-diorite. Tschamny-Burun, Crimea, Russia. A. Lagorio. A. Lagorio, Guide Exc. VII, Cong. G. Int., XXXIII, p. 27, 1897. Quartz-diorite. 408 CHEMICAL ANALYSES OF IGNEOUS ROCKS QUARTZ-DIORITE—Continued. No. Si0 2 A1 2 0 3 Fe./> 3 FeO MgO CaO Xa.,0 k 2 o H 2 0+ H 2 0- C0 2 Ti0 2 PA MnO Sum Sp. gr. 20 1 55. 69 14. 20 11.52 n. d. 1.62 8.14 4.01 1.00 3.15 99. 33 B4. V 21 1 • 63. 93 17.25 5.90 n. d. 2. 03 4. 74 2. 93 3.29 0 . 80 100.87 B4. V 22 • 62. 95 17.61 4. 59 n. d. 2.15 5. 06 3. 30 3. 34 0 . 68 99. 68 A4. IV 23 ■ 60. 70 18. 55 6 . 21 n. d. 2. 56 5.10 2. 54 3. 70 1.18 100.54 A4. IV DIORITE. 1 52. 47 25. 54 6 . 31 n. d. 2. 31 6 . 62 3. 23 0. 54 1.28 1.16 99. 46 2. 870 D4. V 1 2 58. 01 15. 72 0. 64 3.87 2. 07 2.15 0.10 4. 79 2. 71 0. 31 2 . 86 1.08 0. 31 0.17 \ 100.24 Al. I I 3 [ 46. 65 16. 29 n. d. 10. 54 8.13 13. 22 2. 78 trace 1.56 0. 57 1.03 trace trace 100. 77 B3. IV J 4 58. 67 14. 89 7. 56 n. d. 1.79 5. 68 7. 69 2. 69 0. 57 1.00 100. 54 D4. V J r 5 60.13 17.49 2. 89 3. 35 5.30 3. 72 4. 42 3.02 1.04 101. 36 C3. V J 6 i 49. 55 12. 72 5. 28 9. 57 4. 45 7.37 3.15 trace 3. 31 4. 75 trace 100.15 B3. IV 1 7 1 48.50 14.15 7.15 8 . 26 6..65 10. 77 1.97 0.12 3.10 trace 0. 33 101.10 C3. V 1 8 1 48.40 14. 30 16. 20 n. d. 6 . 94 11.09 1. 55 0 . 06 3.25 trace trace 103. 40 D4. V J \ 9 1 55.72 21.35 n. d. 8.81 0. 63 5.10 5. 71 1.23 0. 46 0. 57 0. 36 99.94 A3. Ill 1 10 1 53. 77 20 . 86 n. d. 5.93 2. 76 5.04 5. 01 2. 87 1.86 1.21 99. 31 B3, IV j 11 1 54. 59 21.26 2. 76 3. 41 1.61 4. 84 6 . 36 4. 96 1.32 101.11 C3. V I 12 1 65. 73 17. 85 0. 93 3. 88 1.59 2 . 81 4.06 3. 83 0. 79 101.47 C3. V J 13 > 57. 35 14.61 2.18 3. 99 3. 96 3.51 2. 93 1.92 4. 08 4.16 0 . 81 0. 25 99. 97 2 . 666 A2. II ] 14 1 55.40 16.80 9. 25 n. d. 5.19 7. 60 3.60 1.39 1.25 100. 48 A4. IV 1 INFERIOR ANALYSES. 409 QUARTZ-DIORITE—Continued. ‘ Inclusive. Locality. Analyst. Reference. Author’s name. Remarks Buyuk Ouraga, Crimea, Russia. A. Lagorio. A. Lagorio, Guide Exc. VII, Cong. G. Int., XXXIII, p. 27, 1897. Quartz-diorite. Cap Marsa, Mbnerville, Algeria. Duparc and Pearce. Duparc, Pearce, and Ritter, Mem. Soc. Phys. Gen., XXXIII, No. 2, p. 106, 1900. Microtonalite. Cap Marsa, Menerville, Algeria. Duparc and Pearce. Duparc, Pearce, and Ritter, Mem. Soc. Phys. Gen., XXXIII, No. 2, p. 101, 1900. Tonalite. Cap Marsa, Menerville, Algeria. Duparc and Pearce. Duparc, Pearce, and Ritter, Mem. Soc. Phys. Gen., XXXIII, No. 2, p. 106, 1900. Microtonalite. DIORITE. Whitefish Bay, Rainy Lake, Ontario. F. T. Shutt. A. C. Lawson, A. G., VII, p. 161, 1891. Diorite. Center of dike. A1 2 0 3 high. s As Fe Ni Pb Cu 1.25 1.65 1.52 0.12 0.86 0.05 Croesus Mine, Hailey, Idaho. • W. F. Hillebrand. W. Lindgren, 20 A. R. U. S. G. S., Ill, p. 219, 1900. Altered diorite. Cf. No. 15 andose. S trace Summit of Mount St. Elias, Alaska. E. Mattirolo. V. Novarese, in Filippi and Sella, Sped. Duca Abruz. a Mount St. El., 1897, p. (5). Diorite. Washoe County, Nevada. J. W. Phillips. W. C. Day, 18 A. R. U. S. G. S., V, p. 969, 1897. Diorite. “Granite.” Alkalies high? Rio Colorado, Juncal Valley, Argentina. R. Muller. A. Stelzner, Btr. G. Arg. Rep., I, p. 212, 1885. “Andendiorit.” Revin, Faux Valle}’, Belgium. C. Element. C. Element, cf. N. J. 1890, I, p. 71. Diorite. Not fresh. E 2 0? FeS 0.10 Notre Dame de Meuse, Belgium. C. Element. C. Element, cf. N. J. 1890, I, p. 71. Diorite. S 1.61 Bet. Mairus and Lai- dour, Belgium. C. Element. C. Element, cf. N. J. 1890, I, p. 71. Diorite. Sum high? Kortfors, Orebro, Sweden. H. Santesson. H. Backstrbm. G. F. F., XVI, p. 108, 1894. Eugel in granite. Sliittmossa, Sweden. H. Backstrbm. H. Backstrbm, G. F. F., IX, p. 360, 1887. Eugel in granite. Wirvik, Finland. B. Frosterus. B. Frosterus, T. M. P. M., XIII, p. 188, 1892. Eugel in granite. MgO high? cf. loc. cit. Lippenhof, Schwarz- wald, Baden. Alibegoff. G. H. Williams, N. J. B. B., II, p. 624, 1883. Mica-diorite. so., Org. 0.20 0.02 Litzelkopf, Birkenfeld, Harz Mountains. Biirwald. E. A. Lossen, Jb. Pr. G. L-A., X, p. 266, 1892. Diorite-porphyrite. Not fresh. Kisowa, Schemnitz, Hungary. C. v. John? C. v. John, Jb. Wien. G. R-A., XXXVIII, p. 350, 1888. Augite-diorite. 410 CHEMICAL ANALYSES OF IGNEOUS ROCKS DIORITE—Continued. No. Si0 2 A1A Fe 2 0 3 FeO MgO CaO Na 2 0 K 2 0 H 2 0+ h 2 o- IM o o Ti0 2 p 2 o 5 MnO Sum Sp. gr. 15 1 46. 95 20. 35 9. 65 n. d. 4. 60 12.07 3. 38 1.02 1.00 99. 02 C4. V 1 • 16 1 66 . 75 15. 90 3. 73 1.84 1.23 3.11 3. 38 1.98 1.22 99.14 C3. V j 17 1 57.48 16. 82 8 . 49 n. d. 4.64 5. 45 2. 63 4. 57 0. 25 100. 33 A4. IV J 18 l 56. 77 20 . 02 6 . 40 n. d. 3. 70 5. 40 4. 01 3. 94 0.13 100. 36 A4. IV J ' 19 1 51. 80 19. 05 11.86 1.52 3 . 53 8.10 3. 23 0. 99 0.17 101.15 B3. IV J 20 1 49. 50 19. 61 2. 38 6 . 66 5. 28 10. 75 4.99 2. 35 0.64 • 102 . 20 D3. V j 21 1 44. 74 14. 29 2. 84 7. 49 11.48 13. 70 1.56 0. 45 1.99 98. 59 D3. V j 22 47. 32 14. 96 5.09 9. 88 6.44 9. 50 3.15 n. d. 2.80 99.14 C3. V j J 23 1 47. 25 12.19 1.11 9. 83 6 . 76 11. 74 2 . 20 0. 07 7. 85 99. 00 C3. V 1 24 1 ' } 60. 23 15. 96 7. 47 n. d. 2. 64 8.19 3. 73 0. 98 0. 89 100.09 A4. IV j 25 1 63. 77 16. 30 7.49 n. d. 2. 49 6.33 3. 68 1.21 none 101. 27 C4. V J ESSEXITE. 1 A4. IV j 49. 67 17.99 13. 06 n. d. 3. 06 6 . 63 6 . 21 2 . 62 0. 86 % ’ 100.10 2 D2. V | 45. 66 11.64 3.57 10 . 61 11.08 9.11 2.60 0.44 n. d. 2.75 | 0.26 97. 72 KERSANTITE. 1 1 63. 30 18. 60 2. 33 1.35 1. 66 3. 76 3.45 1.76 2 . 20 2 . 80 101 . 21 C3.V 1 ✓ 2 | \ 52. 30 17. 45 1.80 4. 80 8.50 4. 78 2.12 3.23 3. 70 2. 40 101.08 B3.V J 3 1 51. 80 18.90 1.81 5.25 8 . 32 4. 72 0. 75 6 . 75 1.60 1.50 •101.40 B3. V J 4 1 67. 50 14. 50 7.00 n. d. 2. 30 1.10 3. 38 3. 38 ‘ 1.60 100. 76 B4. V J INFERIOR ANALYSES. 411 DIOR1TE—Continued Inclusive. Locality. Analyst. Reference. Author’s name. Remarks. Jablanic-a, Herzegovina. C. v. John? C. v. John, Jb. Wien. G. R-A., XXXYIII, p. 349, 1888. Augite-diorite. Yal Moja, Edolo, Lom¬ bardy. C. Riva. C. Riva, Att. Soc. Ital. Mil., XXXYI, p. 141, 1896. Diorite. Passo di Campo, Lago d’Arno, Lombardy. C. Riva. C. Riva, Att. Soc. Ital. Mil., XXXYII, p. 84, 1897. Diorite. , Lago d’Arno, Lom¬ bardy. C. Riva. C. Riva, Att. Soc. Ital. Mil., XXXYII, 84, 1897. Diorite. A1 2 0 3 high? * Yal Moja, Edolo, Lom¬ bardy. C. Riva. C. Riva, cf. X. J., 1897, II, p. (64). Diorite-porphyrite. Iron oxides? Beresowka, Ural Moun¬ tains, Russia. Loewinson- Lessing. Loewinson-Lessing, G. Sk. Jushno. Dorpat., 1900, p. 244. Syenite-diorite. Supreya, Ural Moun¬ tains, Russia. Loewinson- Lessing. Loewinson-Lessing, G. Sk. Jushno. Dorpat., 1900, p. 166. Microdiorite. Assa, Caucasus. L.-Lessing and Krikmeyer- Loewinson-Lessing, cf. N. J., 1899, II, p. 234. Metadiorite. Caucasus. •L.-Lessing and Krikmeyer. Loewinson-Lessing, cf. N. J., 1899, II, p. 234. Metadiorite. Not fresh. Menerville, Algeria. Duparc and Pearce. Duparc, Pearce, and Ritter, Mem. Soc. Phvs. Gen., XXXIII, No. 2, p. 32, 1900. Microdiorite. Arthur’s Seat, Shevaroy Hills, Madras, India. T. L. Walker. T. H. Holland, Mem. G. S. India, XXVIII, p. 151, 1900. H yperst hene-dior- ite. ESSEXITE. Monchique, Portugal. Scholar of P. Jan- nasch. K-Koschlau and Hackman, T. M. P. M., XVI, p. 239, 1896. Essexite. S0 3 trace Penikkavaara, Ivuusa- mo, Finland. A. Zilliacus. Y. Hackman, B. Com. G. Finl., No. 11, p. 29, 1900. Essexitic rock. Low sum due to H 2 0? KERSAXTITE. Hopital Camfront, Brittany. Not stated. C. Barrois, Guide Exc. VIII Cong. G. Int., VII, p. 19, 1900. Aplitic kersantite. Hopital Camfront, Brittany. Not stated. C. Barrois, Guide Exc. VIII Cong.G. Int., VII, p. 19, 1900. Kersantite. Hopital Camfront, Brittany. Not stated. C. Barrois, Guide Exc. VIII Cong. G. Int., VII, p. 19, 1900. Kersantite. Alkalies? Croix de Fer, Grandes Rousses, Dauphiny. Fabre. P. Termier, B. Serv. Cte. G. Er., VI, No. 40, p. 50, 1894. Kersantite. 412 CHEMICAL ANALYSES OF IGNEOUS ROCKS. KERSANTITE—Continued. No. Si0 2 A1 2 0 3 Fe 2 0 3 FeO MgO CaO Na 2 0 K 2 0 h 2 0 + H 2 0- co 2 Ti0 2 P-A MnO Sum Sp. gr. I 5 1 66 . 30 15. 30 5. 40 n. d. 2 . 60 0. 90 2 . 80 4. 60 1.20 99.10 C4.V 1 6 i 66 . 04 13. 30 8 . 40 n. d. 2 . 20 1 . 60 3.40 4. 70 1.10 100. 74 B4.V 1 7 1 48.45 15. 57 5. 07 4. 86 4. 28 10. 48 3. 57 2.15 2. 23 1.57 2.15 0 . 80 101.18 C2.IV 1 8 52. 68 14. 05 4. 87 7.88 6 . 58 1. 75 2. 79 2.30 6 . 03 0. 40 trace trace 99. 33 2. 77 B2.III J 9 1 49. 82 14. 50 8 . 06 n. d. 5. 81 7. 69 3. 03 3.50 2. 54 4. 42 trace 99.57 A4.IV. 1 10 1 45.14 9. 68 13. 55 n. d. 10. 78 8 . 65 2.02 3. 27 4. 24 2 . 82 trace trace 100.15 A4.IV. 1 11 • 55.95 19. 47 4. 09 1.08 4.24 7.84 2 . 64 3. 78 1 . 60 100. 69 B3.IV. J PORPHYRITE. 1 A4. IV J 51.93 18.13 8 . 92 n. d. 5. 30 9. 82 4.34 1.42 0. 69 2 Al. I | 49. 47 12.15 1.93 4.07 10 . 86 9. 30 2 . 08 2. 42 4.14 3.31 0.21 0. 37 0.10 100. 44 3 C4 V j 62. 20 21.18 1.42 n. d. trace 2 . 20 9.60 2 . 60 ( 0 . 80) 100 . 00 4 D4. V j 57. 50 27.61 2 . 00 n. d. 2.17 2 . 10 6.11 1.30 1.91 100. 70 5 C4. V | 52.59 18. 57 8 . 62 n. d. 9.18 1.94 1.12 3. 99 3.11 99.11 6 B4. V | 47. 60 19.10 11. 55 n. d. 6 . 95 7.82 3.50 1.94 2. 98 101.44 7 D3. V | 49.17 14. 59 3. 91 12. 94 4. 32 8 . 78 3. 68 0. 79 0. 58 98. 76 8 1)3. V | 65. 35 15. 78 2. 39 3.18 2 . 62 1.59 3. 45 4. 94 2. 29 101.59 2. 648 9 A2. II | 50. 81 15. 90 3. 60 3. 72 7.18 3.67 3. 32 0 . 81 6 . 80 2. 35 1.06 0. 27 99. 75 2.643 10 B4. V | 64. 86 16. 67 6 . 92 n. d. 2.52 2.19 4. 21 2.15 n. d. 0.14 0.13 99. 79 2. 663 11 C3. V | 54.44 19.97 7. 52 0. 52 # 5.15 3.11 2 . 26 3. 58 4.18 100.73 2 . 62 12 A4. IV. | 45. 45 16. 78 1 n. d. 15. 66 3. 07 10.19 2.77 1.42 2. 85 2. 03 100 . 22 INFERIOR ANALYSES. 413 KERSANTITE—Continued. 1 • • Inclusive. ' • Locality. Analyst. . Reference. Author’s name. Remarks. La Balme, Grandes Rousses, Dauphinv. Fabre. P. Termier, B. Serv. Cte. G. Fr., VI, No. 40, p. 50, 1894. Kersantite. Croix de Per, Grandes Rousses, Dauphinv. Fabre. P. Termier, B. Serv. Cte. G. Fr., VI, No. 40, p. 50, 1894. Iversantite. Stbitrenna, Gran, Norway. V. Schmelck, W. C. Brogger, Eg. Kg., Ill, p. 81, 1899. Kersantite. Not fresh. s trace Biirenstein, Thuringia. R. Pohlmann. R. Pohlmann, N. J. B. B., Ill, p. 100, 1885. Kersantite. Not fresh. Bor¬ der of dike; cf. No. 4, kilauose. s trace Falkenstein, Thuringia. R. Pohlmann. R. Pohlmann, N. J. B. B., Ill, p. 97, 1885. Kersantite. Not fresh. s trace Gdhren, Thuringia. K. Pohlmann. R. Pohlmann, N. J. B. B. Ill, p. 97, 1885. Kersantite. Not fresh. Zabehlipe, Prague, Bohemia. J. Nevole. . B. Maeha, Cf. Geol. Centralbl., I, p. 513, 1901. Spessartite. Not fresh. PORPHYRITE. Ivennebunkport, Maine. H. A. Flint. J. F. Kemp, A. G., A , p. 138, 1890. Augite-porphyrite. Cro0 3 trace BaO 0.03 East Gallatin River, Montana. L. G. Eakins. G. P. Merrill, Pr. U. S. Nat. Mus., XVII, p. 645, 1895. Porphvrite. Not fresh. Clermain, Saone-et- Loire, France. Not stated. Levy and Lacroix, B. Serv. Cte. G. Fr., VII, No. 45, p. 6, 1895. Mica-porphyrite. H. 2 0 by differ¬ ence. Clermain, Saone-et- Loire, France. Not stated. Levy and Lacroix, B. Serv. Cte. G. Fr., VII, No. 45, p. 7, 1895. Mica-porphyrite. A1 2 0 3 high. Pelvoux, France. P. Termier? P. Termier, C. R., CXXIV, p. 635, 1897. Porphyrite. Not fresh. Pelvoux, France. P. Termier? P. Termier, C. R., CXXIV, 1 “)., 635, 1897. Porphyrite. Fresh. Foglo, Finland. H. Berghell. B. Frosterus, Finl. G. Und., Bl. 25, p. 23, 1894. Labradorite- porphvrite. St. Amariner Thai, Vogesen. P. Eitner. A. Osann, Abh. Kte. E. L., Ill, p. 132, 1887. Labradorite- porphvrite. S0 3 0.21 Org 0.05 Oberstein, Nahe, Rh. Prussia. Biirwald. K. Lossen, Jb. Pr. G. L-A., X, p. 309, 1892. Labradorite- porphyrite. Not fresh. Hasenberg, Magdeburg, Hesse. Bodi under. F. Klockmann, Jb. Pr. G. L-A., XI, p. 210, 1892. Augite-porphyrite. ALO s high? Potschappel, Saxony. W. Bruhns. W. Bruhns, Z. D. G. G., XXXVIII, p. 748, 1886. Hornblende- porphvrite. Al.fi, high? Iron oxides? . Miihlenthal, Harz Mountains. Streng. K. A. Lossen, Jb. Pr. G. L-A., VI, p. 213, 1886. Labradorite- porphyrite. 414 CHEMICAL ANALYSES OF IGNEOUS KOOKS. PORPHYRITE-Continued. No. Si0 2 Al.jOg Fe 2 O s FeO MgO CaO Na 2 0 K,0 H,0+ H 2 0- ca. " TiO, PA MnO Sum Sp. gr. 13 B2. III. J 75. 21 11. 78 2. 89 0. 55 0.31 1.94 2. 84 2. 63 1.85 0.74 0. 26 101. 00 14 C2. IV. | 72. 36 12. 88 4.54 0. 27 0. 93 2.31 4. 63 1.99 1.19 0.13 0.12 101.35 15 A4. IV. | 63.44 16. 66 6. 94 n. d. 3.15 5.14 1. 81 2.24 0. 85 . 100. 23 16 B4. V. | 52.90 18. 54 7.03 n. d. 8.22 6.11 n. d. n.d. 1.07 (93. 87) 17 1)3. V. | 53. 71 25. 51 7.19 1.74 1.24 4.60 4. 50 1.15 0. 20 99. 84 18 C4. V. J- 47. 77 20. 95 12. 27 n. d. 0. 54 8.18 4. 31 1.88 2. 26 - 0. 43 1.05 99.64 19 A4. IV. Oi o o 17. 71 7. 92 n.d. 1.39 2.96 6. 66 4. 08 1.69 trace trace 100. 05 2. 68 20 A4. IV. j 48.18 16. 55 11.05 n. d. 7. 35 11.19 3. 66 0.46 1.48 trace 99.92 3.04 21 A4. IV. | 47. 77 15. 87 13. 82 n. d. 5.97 11.95 3. 97 0. 22 1.02 trace 100. 59 3. 05 22 B4. V. j 68. 00 12. 56 3. 26 n. d. 4.20 5.28 4.57 0. 95 2.11 100. 93 23 B3. IV J 47. 43 16. 65 11.29 1.28 5.77 10. 84 1.58 2.37 3. 50 100. 71 24 A4. IV | 56. 71 17. 92 8.13 n. d. 4. 27 7. 67 2. 59 0. 44 3.22 100. 35 25 D4. V 1 54.10 15. 91 7.18 n. d. 5. 83 6. 91 3. 76 0.64 3. 98 98. 31 26 B4. V | 49. 57 19. 59 13. 83 n.d. 7.25 3. 82 1.20 0. 36 5.19 100. 81 27 B3. IV j 48. 97 21. 32 0.58 7. 20 10. 55 4. 94 2. 04 0. 42 3. 90 99.92 (99. 42) 28 B4. V J 46. 27. 16. 87 14. 70 n. d. 5. 97 3.73 7. 86 0. 87 3. 08 - 99. 35 INFERIOR ANALYSES. 415 PORPHYRITE—Continued. Inclusive. Locality. Analyst. Reference. Author’s name. Remarks. Near Cimic, Moldau- thal, Bohemia. Neumann. J. Klvana, Cf. N. J., 1898, I, p. 485. Porphyrite. — Klecanky, Moldauthal, Bohemia. Neumann. J. Klvana. Cf. N. J., 1898, I, p. 485. Porphyrite. Cernygraben, Bacher Mountains, Styria. A. Pontoni. A. Pontoni, T. M. P. M., XIV, p. 371, 1895. Mica-porphyrite. Miessling, Bacher Mountains, Styria. A. Pontoni. A. Pontoni, T. M. P. M., XIV, p. 372, 1895. Porphyrite. Alkalies not de¬ termined. Yal Moja, Adamello, Tyrol. C. Riva. C. Riva, Cf. N. J., 1897, II, p. 64. Hornblende- porphyrite. A1 2 0 3 high. Iron oxides? Yaldieri, Alpi Marit- timi, Piedmont. Aichino. S. Franchi, B. Com. G. Ital., XXV, p. 245, 1894. . Hornblende- porphyrite. A1 2 0 3 high. MgO low. Yal Sabbia, Brescia, Italy. C. Riva. C. Riva, Gior. Min., IV, p. 200, 1893. Hornblende- porphyrite. Colle Sagnette, Valley of the Po, Italy. Aichino. S. Franchi, B. Com. G. Ital., XXXI, p. 127, 1900. Porphyrite. Lobbia di Viso, Valley of the Po, Italy. Aichino. S. Franchi, B. Com. G. Ital., XXXI, p. 127, 1900. Porphyrite. Jalguba, Olonez, Russia. Not stated. Loewinson-Lessing, Cf. N. J., 1890, II, p. 267. Augite-porphyrite. * Jalguba, Olonez, Russia. Not stated. Loewinson-Lessing, cf. N. J., 1890, II, p. 267. Augite-porphyrite. Iron oxides. Alouchta, Crimea, Russia. A. Lagorio. A. Lagorio, GuideExc.,VII, Cong.G.Int., XXXIII, p. 27, 1897. Quartz-porphyrite. Kourtzy, Crimea, Russia. A. Lagorio. . A. Lagorio, Guide Exc., VII, Cong. G. Int., XXXIII, p. 27, 1897. Porphyrite. Caucasus. Jastrzembesky. Loewinson-Lessing, cf. N. J., 1899, II, p. 234. Porphyrite. Caucasus. Jastrzembesky. Loewinson-Lessing, cf. N. J., 1899, II, p. 234. Porphyrite. Sum incorrect. Roschka, Caucasus. Makerow. Loew inson-Lessing, cf. N. J., 1899, II, p. 234. Augite-porphyrite. 416 CHEMICAL ANALYSES OF IGNEOUS ROCKS CAMPTONITE. No. Si0 2 ALA FeA FeO MgO CaO Na,0 K.,0 h 2 o+ h 2 o- co 2 Ti0 2 FA MnO Sum Sp. gr. 1 1 38.45 19. 68 4. 01 11.15 6 . 65 9. 37 2. 77 1.72 1.49 4.82 trace 100.11 A4. IV 2 1 D4. V • 41.00 21. 36 13.44 n. d. 3. 85 10. 40 2 . 86 131 5. 00 99. 22 3 1 48.19 16. 79 18. 37 n.d. 1.32 6 . 85 5. 59 i. ii 2. 31 100. 53 B4. Y 1 4 1 44. 85 17.20 11.20 n d. 5.02 7. 52 1.39 2. 99 2. 39 6.58 trace 99.58 C4. V 1 ■ _ 5 43. 50 17.02 13. 68 n. d. 6.84 8.13 2.84 3. 02 4. 35 99. 40 B4. V i •6 42. 05 12. 30 3. 81 9. 52 4. 83 11.55 2.18 1.11 2 . 88 2 . 68 5. 60 98. 51 D2. Y J 7 1 41. 40 13. 28 6 . 54 8.63 5. 26 10. 05 2. 43 0. 75 3.17 4.18 2. 75 98.44 D2. Y 1 8 1 54.67 12 . 68 11.69 2.13 6.11 4. 96 3. 85 3.65 2.10 > 101. 84 D3. V 1 DACITK. 1 A4. IV j 68 . 20 16. 98 3. 75 n. d. 2.07 4. 33 2. 98 1.52 0. 44 100. 27 id A3. Ill | 65.78 14. 87 1.27 1.00 1.89 2. 41 2,58 2. 71 4.32 2. 87 0 . 08 trace 99. 78 3 D4. V | 66. 85 14. 08 3. 06 n. d. 0. 91 4. 69 3. 80 2. 57 2. 07 98. 03 2. 53 4 Da. V | 66. 03 14. 57 2. 57 1.19 1.89 3. 38 3. 71 2. 70 2. 07 0. 09 98. 20 5 B4. V 68 . 32 19 61 n. d. 1.95 4.24 4. 06 1.45 0.54 • 100.17 2 . 765 6 A4. IV | 68.05 17.95 2. 97 n. d. 1.40 3.65 3. 56 1.25 1.78 trace trace 100 . 61 7 B4. V | 68. 97 17. 03 1.30 n.d. 0. 79 3. 26 5.15 1.70 1.10 99. 30 8 D3. V | 65. 29 20.15 5. 57 1.13 ■ 0.16 2.11 2. 52 1.24 1.19 99. 36 9 D3. V j 65. 75 18. 38 2.00 1.30 1.52 3. 70 4.04 4.11 1.20 0 . 20 102 . 20 10 A4. IV j 68.47 14. 67 3. 93 n. d. 0. 32 3. 89 2.34 3.42 2. 59 100. 63 INFERIOR ANALYSES. 417 CAMPTONITE. Inclusive. Locality. Analyst. Reference. Author’s name. Remarks. Campton Falls, Grafton County, New Hamp¬ shire. L. G. Eakins. J. P. Iddings, B. U. S. G. S. 150, p. 241, 1898. Camptonite. Ti0 2 not deter¬ mined. Not fresh. Proctor, Vermont. J. F. Kemp. Kemp and Marsters, A. G., IV, p. 101, 1889. Camptonite. Not fresh. Ti0 2 not de¬ termined. A1 2 0 8 high. Forest of Dean, Orange County, New York. J. F. Kemp. J. F. Kemp, A. J. S., XXXV, p. 332, 1888. Camptonite. Fort Montgomery, Hudson River, New York. Dennis. Kemp and Dennis, Am. Naturalist, Aug., 1888. Camptonite. Fairhaven, Hampton County, New York. J. F. Kemp. Kemp and Marsters, A. G., IV, p. 101, 1889. Camptonite. Not fresh. Egge, Gran, Norway. L. Sehmelck. W. C. Brogger, Q. J. G. S., L., p. 20, 1894. Camptonite. Sum low. Not fresh. Hougen, Gran, Nor¬ way. L. Sehmelck. W. C. Brogger, Eg. Kg.,' Ill, p. 60, 1899. Camptonite. Sum low. Not fresh. Waldmichelbach, Spessart, Bavaria. E. Goller. E. Goller, N. J. B. B., VI, p. 566, 1889. Camptonite. DACITE. Lassen Peak, Califor¬ nia. T. M. Chatard. J. S. Diller, B. U. S. G. S., 150, p. 218, 1898. Dacite. Near Paskenta, Tehama County, California. G. Steiger. J. S. Diller, B. U. S. G. S., 148, p. 194, 1897.. Dacite tuff. Seal Harbor, San Clemente Island, California. W. S. T. Smith. W. S. T. Smith, 18 A. R. U. S. G. S., II, p. 488, 1898. Dacite. Hondon, Chiles Vol¬ cano, Colombia. R. Kiich. R. Kiich, G. Stud. Colomb., I, p. 179, 1892. Dacite. Mojanda, Quito, Ecua¬ dor. A. Lagorio. A. Lagorio, T. M. P. M., VIII, p. 458, 1887. Dacite. Cerro Quimsa Chata, Bolivia. F. Rudolph. F. Rudolph, T. M. P. M., IX, p. 311, 1888. Dacite. Cerros Blancos, San Juan, Argentina. R. E. Teichgriiber. • A. Stelzner, B. tr. G. Arg. Rep., 1, p. 184, 1885. Dacite. Garbanzal, Cabo de Gata, Spain. Hauff. A. Osann, Z. D. G. G., XLIII, p. 706, 1891. Dacite. Al a Og high. Mount Elbruz, Caucasas. A. Dannenberg. A. Dannenberg, T. M. P. M., XIX, p. 233, 1900. Dacite. Sum high. Cap Blanc, Menerville, Algeria. Duparc and Pearce. Duparc, Pearce, and Ritter, Mem. Soc. Ph. Gen., XXXIII, No. 2, p. 59, 1900. 1 )acite. In addition 2.32 s. 14128 — No. 14—03 - 27 418 CHEMICAL ANALYSES OF IGNEOUS ROCKS. DACIT E—Continued. No. Si0 2 A1 2 0 3 Fe 2 0 8 FeO MgO CaO Na.,0 k 2 o . H,0+ h 2 o- co 2 Ti0 2 PA MnO Sum Sp. gr. 11 1 67.71 17.25 4.21 n. d. 1.43 4.38 3.13 2. 90 1. 35 102. 36 D4. V I ' 12 1 67. 47 19. 07 1.05 n. d. 0. 24 4. 87 3. 87 3. 89 0. 84 101. 30 C4. V 1 13 1 63.00 17. 40 5. 03 n. d. 1.02 5. 71 3. 89 4.81 0. 48 101.34 C4. V 1 14 i 59. 24 18. 45 4. 58 n. d. 2.06 6. 08 3.15 3. 22 3. 66 100. 44 A4. IV 1 15 ] \ 58. 29 23. 66 n.d. 1.93 6. 75 1.59 2. 32 5. 63 100.17 B4. V 1 ANDESITE. 1 D2. V 2 C3. V 3 B4. V 4 A3. Ill 5 A3. Ill 6 A4. IV 7 D3. V 8 A4. IV 9 B3. IV 10 A4. IV 11 A4. IV 12 B4. V 13 B3. IV 1H 14. 89 6.54 none 0.82 1 0.59 4. 47 4. 78 3. 20 0. 78 trace 0. 61 99. 93 j 52.94 14. 70 2. 52 7.80 4.49 6. 56 3. 09 0. 04 2.04 4. 86 • 99. 04 l 54. 86 15.04 4. 92 3.11 1.88 9.19 11. 30 n. d. 0.46 100. 76 j 69. 51 15. 61 0. 56 1.27 0. 61 2. 80 3. 43 2. 81 3. 63 trace 100. 23 j 62.94 18.14 n. d. 3. 82 3. 06 6. 28 3. 83 1.22 0. 60 0. 41 0.10 100. 40 j 58.97 18. 60 5. 94 n. d. 6. 89 2. 84 3. 05 2. 24 1.35 99. 88 o o d 19. 01 - 3. 20 0. 68 1.28 4.10 6. 97 2. 79 4.30 trace 102. 33 | 55. 80 18. 22 8. 98 n. d. 2. 23 4. 40 6. 34 1.90 2. 30 100.17 j 67.83 15. 02 n. d. 5.16 0. 29 3. 07 2. 40 3. 20 1.11 1.04 0.26 99. 38 j 59.22 18. 20 n. d. 6. 69 2. 90 5. 51 1.39 3. 31 2. 80 100. 02 | 58.44 18.17 n. d. 6. 03 2. 40 6.19 3. 20 1.97 0. 76 2. 87 100. 03 J 56. 71 18. 36 n. d. 6. 45 3. 92 6.11 3. 52 2. 38 1.94 99.39 j 49.80 15. 33 n. d. 7. 44 6. 61 7.19 2. 71 4. 36 1.38 2. 56 2. 67 0. 73 0. 30 101. 08 INFERIOR ANALYSES. 419 DACITE—Continued. Inclusive. Locality. Analyst. Reference. Author’s name. Remarks. Pra Zeg Etter, Menerville, Algeria. Puparc and Pearce. Duparc, Pearce, and Ritter, Mem. Soc. Ph. Gen., XXXIII, No. 2, p. 129, 1900. Dacite. Sum high. Cap Blanc, Menerville, Algeria. Puparc and Pearce. £ Puparc, Pearce, and Ritter, Mem. Soc. Ph. Gen., XXXIII, No. 2, p. 59, 1900. Dacite. Cap Blanc, Menerville, Algeria. Puparc and Pearce. Puparc, Pearce, and Ritter, Mem. Soc. Ph. Gen., XXXIII, No. 2, p. 59, 1900. Dacite. t Pra Zeg Etter, Menerville, Algeria. Puparc and Pearce. Duparc, Pearce, and Ritter, Mem. Soc. Ph. Gen., XXXIII, No. 2, p. 129, 1900. Dacite. H 2 0 includes co 2 . Pra Zeg Etter, Menerville, Algeria. Puparc and Pearce. Duparc, Pearce, and Ritter, Mem. Soc. Ph. Gen., XXXIII, No. 2, p. 129, 1900. Dacite. H 2 0 includes co 2 . •» ANDESITE. North Haven, Fox Islands, Maine, Magruder and Jones. G. O. Smith, In. Piss., Johns Hopkins Univ., 1896, p. 33. Andesite. Does not corre¬ spond with mode. Ely, Minnesota. C. F. Sidener. N. H. Winchell, 23 A. R. G. Nh. S. Minn., p. 204, 1895. Felsite. Not fresh. Mount Tacoma, Washington. F. Collischon. K. Oebbeke, N. J., 1885, I, p. 226. Andesite. Alkalies high and not sepa¬ rated. Stillwater Creek, Lassen Peak, California. W. H. Melville. J. S. Diller, B. U. S. G. S., 150, p. 212, 1898. Andesite, tuff. Lassen Peak, California. P. W. Shinier. Hague and Iddings, A. J. S., XXVI, p. 225, 1883. Andesite. Lassen Peak, California. T. M. Chatard. J. S. Diller, B. U. S. G. S., 148, p. 193, 1897. Secretion in dacite. A1 2 0 3 high. Ti0 2 not deter¬ mined. Carmelo Bay, California. J. Posada. A. C. Lawson, B. Dep. G. Un. Cal., I, p. 42, 1893. Carmeloite. Sum high. ALOo high and MgO low. Point Sal, California. H. W. Fairbanks. H. IV. Fairbanks, B. Dep. G. Un. Cal., II, p. 50, 1896. Andesite. Hoosac Mountain, Eureka, Nevada. R. IV. Mahon. Hague and Iddings, M. U. S. G. S., XX, p. 264, 1892. Andesite. Cf. Iddings, B. U. S. G. S., 150, p. 221, 1898. Silver Terrace, Washoe, Nevada. W. G. Mixter. G. F. Becker, M. U. S. G. S., Ill, p. 152, 1882. Pyroxene-andesite. Cf. Hague and Iddings. B.U. S. G. S., 17, p. 33, 1885. American Flat, Washoe, Nevada. IV. G. Mixter. G. F. Becker, M. U. S. G. S., Ill, p. 152, 1882. Pyroxene-andesite. Cf. Hague and Iddings. B. U.S. G. S. 17, p. 33, 1885. Eldorado, Washoe, Nevada. R. IV. Wood¬ ward. G. F. Becker, M. U. S. G. S., Ill, p. 152, 1882. Pyroxene-andesite. Cf. Hague and Iddings, B. U. S. G. S., 3.17, p. 33, 1885. Near Grant’s, Mount Taylor Region, New Mexico. T. M. Chata-d. J. S. Diller, B. U. S, G. S., 148, p. 185, 1897. Mica-andesite. Not fresh. 420 CHEMICAL ANALYSES OF IGNEOUS ROCKS. ANDESITE—Continued. No. Si0 2 A1A Fe 2 0 3 1 FeO MgO CaO Na 2 0 k 2 o h 2 o+ h 2 o- co 2 Ti0 2 PA MnO Sum Sp. gr. 14 A3. Ill J 45. 31 9.96 3. 43 12. 99 2. 56 16. 44 0.41 0. 25 3. 77 5.39 100. 51 15 A4. IV j 61.24 18.32 6.17 n. d. 3. 76 5.06 3 .15 2.37 0.67 100. 74 2.612 16 A4. IV | 61.06 15. 42 8. 01 n. d. 3. 55 7.11 2. 66 1.40 0. 68 trace trace trace 99. 89 2. 658 17 A4. IV | 59.84 18. 57 4. 76 n. d. 2.95 4. 69 2. 85 2. 72 4.10 100. 48 2. 177 18 A2. II | 53.68 16. 96 5. 00 2. 41 1. 79 10.18 3. 55 0. 76 0. 48 4. 40 0. 88 0.51 100. 60 2. 736 19 C4. V | 56. 73 20. 44 5. 71 n. d. 2.58 7.23 3. 73 2. 45 0. 54 99. 41 20 B4. V J 59.13 17.00 7. 03 n. d. n. d. 6. 67 4.80 1.37 0.16 96.16 21 C4. V 1 57. 24 18. 02 3. 46 4.13 3. 77 7. 78 5. 54 0. 06 100. 00 22 A4. IV j 60. 34 15.66 n. d. 8.13 2.11 6. 97 5.12 0. 90 0. 87 100.10 23 B4. V j 62. 80 16. 36 n. d. 7.11 3.05 3. 63 4. 50 0. 80 1.00 99.25 2. 561 24 B4. V j 62.30 14. 46 n. d. 7. 71 2.14 5. 35 4. 80 1.72 0. 98 -■ 99. 46 2. 664 25 D4. V | 60.10 15.56 n. d. 7. 83 1.22 5. 97 5.11 1.69 0. 95 98. 43 26 D3. V | 55. 64 21.45 5.41 6. 58 3.10 5. 59 3. 08 1.60 n. d. 102. 45 27 A4. IV | 68.18 16. 86 6.12 n. d. 0. 71 5. 35 2. 40 0. 21 0. 73 trace trace 100. 56 28 A4. IV | 68. 05 17. 95 2. 97 n. d. 1.40 3. 65 3. 56 1.25 1. 78 trace trace 100. 61 29 D4. V | 65. 39 17. 20 6.39 n. d. trace 5. 74 2. 73 0.47 0.59 trace trace 98.51 30 D4. V | 63. 86 16. 52 5.91 n. d. 1.60 3.71 3.16 2. 47 0. 93 trace 98.16 31 C3. V 32 B4. V 23. 21 5.33 2.44 0. 76 11.37 2. 69 n. d. n. d. 100. 38 i 56. 50 28. 20 n. d. 0. 98 2. 83 6. 68 4. 25 n. d. 99.44 33 B‘2. Ill j 56.03 12.51 0.45 15. 73 6. 08 4.17 2. 01 0. 73 0. 70 0. 74 0.19 99. 34 INFERIOR ANALYSES. 421 ANDESITE—Continued. Inclusive. S0 3 trace Locality. Analyst. Reference. Author’s name. Remarks. St. Thomas, West Indies. J. v. Siemiradzki. J. v. Siemiradzki, N. J., 1886, II, p. 178. A north i te-and esite. Not fresh. Mount Iztaccihuatl, Mexico. H. Lent? H. Lenk in Felix and Lenk, Btr. G. Mex., II., p. 229, 1899. Hornblende- andesite. Cerro Guerrero, north of Mexico City, Mexico. Konig. H. Lenk in Felix and Lenk, Btr. G. Mex., I, p. 100, 1890. Hypersthene- andesite. Amecameca, Mexico. 11. Lenk? H. Lenk in Felix and Lenk, Btr. G. Mex., II, p. 229, 1899. Andesite-pumice. Ejutla, Oaxaca, Mexico. A. Rohrig. H. Lenk in Felix and Lenk, Btr. G. Mex., II, p. 140, 1899. Hypersthene- andesite. Not fresh. Irazu Volcano, Carthago, Costa Rica. A. Lagorio. A. Lagorio, T. M. P. M., VIII, p. 467, 1887. Andesite. AL,0 3 high. Cerro Negro, Mayasquer, Colombia. Buntzel. R. Kiich, G. Stud. Colomb., I, p. 183, 1892. Pyroxene-andesite. MgO not determined. Pasto Volcano, Colombia. R. Kiich. R. Kiich, G. Stud. Colomb., I, p. 141, 1892, Pyroxene-andesite. Alkalies by difference. Zechzech, Alausi, Ecuador. J. v. Siemiradzki. J. v. Siemiradzki, N. J. B. B., IV, p. 209, 1886. Andesite. Zechzech, Alausi, Ecuador. J. v. Siemiradzki. J. v. Siemiradzki, N. J. B. B., IV, p. 209, 1886. Hornblende- andesite. Zechzech, Alausi, Ecuador. J. v. Siemiradzki. J. v. Siemiradzki, N. J. B. B., IV, p. 209, 1886. Augite-andesite. Zechzech, Alausi, Ecuador. J. v. Siemiradzki. J. v. Siemiradzki, N. J. B. B., IV, p. 209, 1886. Hornblende-augite- andesite. Sum low. Rio Chanchan, Ecuador. J. v. Siemiradzki. J. v. Siemiradzki, N. J., 1885, I, p. 156. Hypersthene- andesite. Sum high. A1.A high. Sajama Volcano, Bolivia. F. Rudolph. F. Rudolph, T. M. P. M., IX, p. 306, 1888. Hornblende- andesite. Cerro Quimsa Chata, Bolivia. / F. Rudolph. F. Rudolph, T. M. P. M., IX, p. 311, 1888. Hornblende- andesite. Sajama Volcano, Bolivia. F. Rudolph. F. Rudolph, T. M. P. M., IX, p. 306, 1888. Hornblende- andesite. Sum low. Sajama Volcano, Bolivia. F. Rudolph. F. Rudolph, T. M. P. M., IX, p. 299, 1888. Hornblende- phyroxene- andesite. Sum low. Osorno Volcano, Chile. W. Bruhns. W. Bruhns, cf. N. J., 1899, 11, p. 85. Augite-andesite. A1A high. Chatham Bay, Cocos Island, Galapagos Islands. G. P. Merrill. G. P. Merrill, B. Mus. Comp. Zool., XVI, No. 13, p. 237, 1893. Andesite? Burnt Hill, King Charles Land, Spitsbergen. N. Sahlbom. A. Hamberg, G. F. F., XXI, p. 523, 1899. Hypersthene- andesite. Scoria. 422 CHEMICAL ANALYSES OE IGNEOUS ROCKS. ANDESITE—Continued. No. Si0 2 A1A j Fe 2 0 3 FeO MgO CaO Na.,0 K 2 0 H 2 0+ H 2 0- C0 2 Ti0 2 PA MnO Sum Sp. gr. 34 A3. Ill | 55. 78 12. 77 12.65 4.37 6.30 2. 88 2. 38 0. 75 0. 83 0. 80 trace 99. 51 35 A4. IV J 53.59 17.96 n. d. 7. 74 2. 55 6. 53 4.54 3.18 n. d. 3. 26 0. 68 100. 03 36 A4. IV | 66.62 14. 02 5. 73 n. d. 0. 33 2. 74 6. 93 1.51 2. 83 trace 100. 71 37 B4. V | 62. 89 14. 84 9. 20 n. d. 0.37 3.61 4. 01 2. 91 1.41 99. 24 38 D3. V J 57.57 14. 42 6.04 3. 95 4. 24 6. 87 2. 98 1.08 1. 55 0. 27 98.97 39 A4. IV J 52. 68 12.66 17. 34 n. d. 0. 93 11.45 2. 49 1.91 0. 70 100.16 40 A4. IV j 65. 81< 14.01 4.43 n. d. 0. 89 2. 01 4.15 6. 08 2. 70 100. 08 41 D3. V J 61.17 16. 87 2.10 2. 94 3.00 4. 86 2. 67 1.81 3. 09 98. 51 2. 543 42 A4. IV | 66. 03 12. 55 2. 75 n. d. 2 . 33 2. 80 5.02 4.13 4. 20 99. 81 43 A4. IV j 55. 79 15.97 12. 50 n. d. 9 99 XJ. w — 7.06 2. 21 1.86 2. 43 100. 49 2. 705 44 B3. IV J 59.43 16. 00 4.49 3. 67 4.05 8.03 2. 22 1.28 n. d. 99.17 45 D4. V j 58. 07 13. 22 10.10 n. d. 4. 46 7.04 2. 58 1.59 1.50 98. 56 46 A4. IV | 57.80 16.18 10. 07 n. d. 4. 68 6.18 2. 38 0. 77 1.70 99. 76 2. 81 47 A4. IV j 56.10 17. 24 4. 76 n. d. 2. 29 11.20 2. 04 1.38 1.55 3. 60 100.16 48 D3. V j 48. 37 20. 74 6. 56 0. 63 6. 35 7. 77 1.70 none 1.60 6. 00 0. 94 100. 66 49 B4. V J 61.8 16.5 6. 7 n. d. 1.2 4.5 7.2 1.4 0.6 99.9 50 B4. V | 59.15 14. 54 12. 31 n. d. 1.97 trace. 4.01 6. 56 1.51 trace 100. 05 2. 68 •51 B4. V j 63. 47 18. 76 3. 74 n. d. 1.12 7.10 3. 93 1.09 1.47 0. 40 trace 101.08 52 D4. V J 62. 91 18. 31 5. 55 n. d. 1.97 5. 93 3. 67 1.66 2.17 0. 37 102. 54 53 C4. V | 61. 58 18. 84 4.68 n. d. 2. 04 6. 59 4.27 1.49 1.61 0.27 trace 101. 37 INFERIOR ANALYSES. 423 ANDESITE—Continued. Inclusive. Locality. Analyst. Reference. Authors name. Remarks. Burnt Hill, King Charles Land, Spitsbergen. N. Sahlbom. A. Hamberg. G. F. F., XXI, p. 528, 1899. Hypersthene- an desite. Scoria. Floated block, Temple Bay, Spitsbergen. H. Backs trom. H. Backs trom, Bih. Sv. Vet. Ak. Hd., XVI, Pt. II, p. 89, 1890. A ugite-andesite. Pumice. Beinn Hiant, Island of Mull, Scotland. T. H. Holland. J. W. Judd, Q. J. G. S., XLVI, p. 379, 1890. Andesite. Beinn Talaidh, Island of Mull, Scotland. T. H. Holland. J. W. Judd, Q. J. G. S., XLVI, p. 349, 1890. Andesite. Cleveland Dike, Mull, Scotland. Stock. J. W. Judd, Q. J. G. S., XLVI, p. 379, 1890. Tholeiite. Beinn Hiant, Island of Mull, Scotland. W. Tate. J. W. Judd, Q. J. G. S., XLVI, p. 379, 1890. Tholeiite. Scuir of Eigg, Scotland. B. North. J. W. Judd, Q. J. G. S., XLVI, p. 379, 1890. Andesite. Carhope, Cheviot Hills, Scotland. Petersen? J. J. H. Teall, G. M., XXII, p. 118, 1885. Hypersthene- andesite. Sum low. Tormore, Arran, Scot¬ land. M. M. Tait. J. W. Judd, Q. J. G., S.. XLIX, p. 558, 1893. Pitchstone (andesite). S. 0.45 Cirmhor Dike, Arran, Scotland. Cnder Thorpe. J. W. Judd, Q. J. G. S., XLIX, p. 545, 1893. Augite-a.idesite. Border of dike. Bard on, Charnwood Forest, England. Lord. Hill and Bonney, Q. J. G. S., XLVII, p. 89, 1891. Andesite. Armathwaite, England. W. F. Iv. Stock. J. J. H. Teall, Q. J. G. S., XL, p. 224, 1884. Andesite. Acklington, England. J. E. Stead. J. J. H. Teall, Q. J. G. S., XL, p. 243, 1884. Andesite. Preston, England. J. E. Stead. J. J. II. Teall, Q. J. G. S., XL, p. 224, 1884. Andesite. Not fresh. Killerton, Devonshire, England. E. Haworth. B. Hobson, Q. J. G. S., XLVIII, p. 507, 1892. Mica-augite- andesite. Not fresh. AL,0 3 high. No K 2 0. Cam Bodnan, Caernar¬ vonshire, Wales. E. H. Acton. A. Harker, Bala Vole. Series, 1889, p. 69. Pyroxene-andesite. Carn Fawr, Penbroke- shire, Wales. F. E. Tad man. F. R. C. Reed, Q. J. G. S., LI, p. 192, 1895. Tachylyte. Boulevie, Esterel, France. Rust. A. Michel-Levy, B. Serv. Cte. G. Fr., No. 57, p. 19, 1897. Esterellite. • La Touchque, Esterel, France. Rust. A. Michel-Levy, B. Serv. Cte. G. Fr., No. 57, p. 21, 1897. Esterellite. Dramont, Esterel France. Rust. A. Michel-Levy, B. Serv. Cte." G. Fr.. No. 57, p. 19, 1897. Esterellite. ’■I 50 63 01 26 13 27 54 30 92 20 99 48 77 06 11 31 20 38 60 CHEMICAL ANALYSES OF IGNEOUS ROCKS ANDESITE—Continued. A1A FeA FeO MgO CaO Na,0 Iv 2 0 h 2 o+ H 2 0- C0 2 Ti0 2 PA MnO Sum 18. 49 6. 38 n. d. 2.15 5. 65 4.19 1.69 3.57 0. 35 101.97 18. 43 4.59 n. d. 2. 38 7.18 3. 92 1.30 5. 20 0. 28 trace 100.91 15. 69 4. 78 5. 79 6. 20 11.21 1.19 1.55 0. 65 b 102.07 15.93 6. 80 5. 53 3.35 11.32 1.94 1.10 i 0. 99 0.27 101.49 15. 61 2. 33 8. 23 5. 80 11.75 1.86 1. 78 0. 73 101. 22 19. 27 n. d. 8. 82 3.18 5. 86 3. 44 4.69 2.47 100. 00 23 56 n. d. 1.15 4. 75 3.16 2. 43 1. 75 99. 35 17. 45 5.50 n. d. 1.21 4. 20 2. 95 2. 90 2. 70 99. 21 21.09 n. d. 3. 88 0. 72 4. 61 1.04 2. 86 1.50 trace 99. 62 19. 72 n. d. 10.49- 2. 46 9.40 2. 05 0.64 0. 68 99. 64 24. 27 i). d. 7. 35 2. 39 9.23 1.59 0. 75 0. 55 100.10 16. 82 8. 49 n. d. 4. 64 5. 45 2. 63 4. 57 0. 25 100. 33 20. 02 6. 40 n. d. 3. 70 5.40 4. 01 3. 94 0. 13 100. 36 16. 40 2. 88 4.18 2. 63 4.32 5. 29 1.49 2. 06 trace 98. 31 12.10 7. 74 n. d. 1.70 4. 09 2. 86 2. 73 2.11 0. 08 99. 52 16. 95 n. d. 8. 07 1. 65 4. 30 1.59 3. 42 2. 64 2.10 • 0.40 100.43 15. 40 7. 74 n. d. 2. 09 5. 95 3. 25 2.45 0.13 0.13 0. 46 99. 80 18.13 9.23 n. d. 1.93 8. 50 2. 44 1.36 0.41 0. 20 0.34 99.92 14. 71 8.55 n. d. 4.98 7. 54 3. 46 1.87 0:73 0. 05 0. 82 100. 31 INFERIOR ANALYSES. 425 ANDESITE—Continued. Inclusive. Locality. Analyst. Reference. Author’s name. Remarks. Dramont, Esterel, France. Rust. A. Michel-Levy, B. Serv. Cte. G. Fr., No. 57, p. 21, 1897. Esterellite. Lee Cours, Esterel, France. Rust. A. Michel-Levy, B. Serv. Cte. G. Fr., No. 57, p. 19, 1897. Esterel lif e. Alboran Island, Spain. H. Graber. F. Becke, T. M. P. M., XVIII, p. 544, 1899. Alboranite. Sum high. Alboran Island, Spain. H. Graber. F. Becke, T! m. p. m., XVIII, p. 544, 1899. Alboranite. Isla de la Nube, Albo¬ ran Island, Spain. H. Graber. F. Becke, T. M. P. M., XVIII, p. 544, 1899. Alboramte. Horberig, Kaiserstuhl, Baden. A. Knop. , A. Knop, Der Kaiserstuhl, 1892, p. 259. Andesite. Calc to 100 after deducting2.27 H 2 0 and 3.1 CaC0 3 Not fresh. Hlinikerthal, Hungary. A. Lagorio. A. Lagorio, T. M. P. M., VIII, p. 467, 1887. Andesite. Bohunitz, Hungary. A. Lagorio. A. Lagorio, T. M. P. M., VIII, p. 467, 1887. Andesite. Bujaker Wald, Cserhat, Hungary. A. Kalecsinsky. F. Schafarzik, Mt. Hung. G. A., IX, p. 301, 1895. Pyroxene-andesite. A1 2 0 3 high. • Peleske, Cserhat, Hun¬ gary. A. Kalecsinsky. F. Schafarzik, Mt. Hung. G. A., IX, p. 258, 1895. Pyroxene-andesite. A1 2 0 3 high. Peleske, Cserhat, Hun¬ gary. A. Kalecsinsky. F. Schafarzik, Mt. Hung. G. A., IX, p. 258, 1895. Pyroxene-andesite. A1 2 0 3 high. Passo di Campo, Ada- mello, Tyrol. C. Riva. C. Riva, cf. N. J., 1898. II, p. 247. Malchite. Lago d’Arno, Ada- mello, Tyrol. C. Riva. C. Riva, cf. N. J., 1898, II, p. 247. Malchite. . Punta della Manza, Capraia Island, Italy. A. Rohrig. H. Emmons, Q. J. G. S., XLIX, p. 142, 1893. Andesite. Pizza del Corvo, Panaria, Hiolian Islands. F. Glaser. A. Bergeat, Sb. Miinch. Ak., XX, p. 59, 1899. Hornblende- andesite. Monte Sant’ Angelo, Li pari, Aeolian Islands. F. Glaser. A. Bergeat, Sb. Munch. Ak., XX, p. 102, 1899. Cordierite-andesite. Capo Graziano. Filicudi, AColian Islands. F. Glaser. A. Bergeat, Sb. Miinch. Ak., XX, p. 214, 1899. Cordierite-andesite. Summit Filicudi, Lipari Islands. F. Glaser. A. Bergeat, Sb. Miinch. Ak., XX, p. 208, 1899. Pyroxene-andesite. Summit Alicudi, Lipari Islands. F. Glaser. A. Bergeat, Sb. Miinch. Ak., XX, p. 219, 1899. Olivine-pyroxene- andesite. CHEMICAL ANALYSES OF IGNEOUS ROCKS 426 ANDESITE—Continued. No. Si0 2 Al 2 O s Fe 2 0 3 FeO MgO CaO Na 2 0 K 2 0 h 2 0+ H 2 0- C0 2 Ti0 2 FA MnO Sum Sp. gr. 73 B3. IV | 69. 52 13.12 5.27 n. d. 0. 47 7.18 2.06 1.08 0.42 1.46 0.17 100. 75 74 B3. IV | 68. 85 13. 02 2. 67 n. d. 1. 57 4. 72 1.90 1.80 3.03 1.36 0. 21 100.17 75 A4. IV | 63.44 12. 88 7. 64 n. d. 2. 45 6.04 4. 02 3. 09 0. 31 0.16 0.29 100.32 76 A3. Ill J 63. 27 12. 34 7. 32 n. d. 3. 99 8. 06 1.29 2. 67 0. 30 0. 23 0.34 100.36 77 1 58. 05 12.06 8.42 n. d. 3. 62 8. 76 1.46 2.38 1.42 1.12 0.44 100.30 0.53 B3. IV 7* C4.V 79 B4. V 80 B4. V J 99. 79 J 73. 73 14. 77 n. d. 0. 94 1.93 3. 2 7 2. 75 1. 76 % 99.15 j 71. 05 17. 61 n. d. trace 4.45 3. 04 2. 56 1.42 100.13 j 68. 00 17. 91 n. d. trace 5.63 3. 35 2. 58 2. 60 100.07 81 A4. IV j 60. 95 16. 42 7. 02 n. d. 2.05 6. 99 3.35 0. 83 2. 20 0. 80 100.59 2. 74 82 A4. IV 83 C4.V J 58.42 18.08 5.30 n. d. 1. 78 6.15 3.46 0.91 5. 31 100.44 2. 62 j 58. 35 24. 92 n. d. 0. 77 2. 31 6. 47 3. 55 1.66 99. 00 84 A4.IV | 57. 01 19. 02 n. d. 5. 82 5.47 6. 92 4. 49 1.63 0. 20 100. 56 85 A4. IV J 56.99 19. 58 n. d. 5.44 5.34 6. 80 3. 36 1.79 0.13 99. 43 86 C3.V | 54. 86 23. 08 4. 41 ' 1.50 1.29 6. 98 3. 35 1.48 2. 80 0. 05 99. 81 2.503 87 C4.V | 67. 66 15.30 2.37 n. d. 1.53 4. 95 3. 68 2.69 2. 90 101.08 88 D3. V J 56. 70 19. 57 2. 96 1.70 3.34 6.17 3. 59 1.71 3. 20 98. 94 89 D4. V | 55.55 17.14 6. 39 n. d. 3. 30 6. 78 2. 88 • 3. 87 1. 76 97. 67 90 C4. V | 64. 54 19.16 7.23 n. d. 3. 39 2.47 0. 57 1.13 2. 25 0. 79 101.53 91 D3. V | 57.16 20. 06 2.84 1.95 1.55 4. 41 5.84 4. 52 1.09 2. 67 trace 102. 09 92 A4. IV | 55.67 16. 06 10. 89 n. d. 2. 93 5. 92 3. 81 0. 51 4.15 0. 83 100. 77 INFERIOR ANALYSES. 427 AND ES IT E—Con tinued. Inclusive. S0 3 1.04 Cl trace S0 3 trace Cl trace SO 3 0.41 Cl 0.08 SO Cl 3 0.21 2.42 Locality. Analyst. Reference. Author’s name. Remarks. Lava of 1888, Vulcano, yEolian Islands. L. Ricciardi. G. Mercalli, Gior. Min., Ill, p. 110, 1892. Andesite. P 2 0 5 high Eruption, Aug., 1888, Vulcano, yEolian Islands. L. Ricciardi. G. Mercalli, ■ Gior. Min., Ill, p. 112, 1892. Andesite ashes. P,0 5 high. 2.67% sol. in II., O. Eruption, Nov., 1888, Vulcano, yEolian Islands. L. Ricciardi. G. Mercalli, Gior. Min., Ill, p. 112, 1892. Andesite ashes. Eruption, Sept., 1888, Vulcano, AColian Islands. < L. Ricciardi. G. Mercalli, Gior. Min., Ill, p. 112, 1892. Andesite ashes. 1.00% sol. in H,0. Eruption, Sept., 1888, Vulcano, yEolian Islands. L. Ricciardi. G. Mercalli, Gior. Min., III,p. 112,1892. Andesite ashes. PA high. 4.15% sol. in H.,0. Kara Dag, Crimea, Russia. A. Lagorio. A. Lagorio, Guide Exc. VII. Cong. G. Int., XXXI, p. 13,1897. Pyroxene-andesite. Kara Dag, Crimea, Russia. A. Lagorio. A. Lagorio, Guide Exc. VII. Cong. G. Int., XXXI, p. 13,1897. Pyroxene-andesite. Kara Dag, Crimea, Russia. A. Lagorio. A. Lagorio, Guide Exc. VII. Cong. G. Int., XXXI, p. 13,1897. Pyroxene-andesite. Bujuk-Uragi Mt., Crimea, Russia. R. Prendel. R. Prendel, cf. N. J., 1887, II, p. 97. Andesite. Kara Dag, Crimea, Russia. A. Lagorio. A. Lagorio, T.M.P.M., VIII, p. 473,1887. Andesite. S. of Kara Dag, Crimea, Russia. A. Lagorio. A. Lagorio, Guide Exc. VII. Cong. G. Int., XXXI, P- 13,1897. Pyroxene-andesite. i Mleti, Caucasus. L.-Lessing and Krikmeyer. Loewinson-Lessing, cf.N. J.,1899, II, p. 237. Andesite. Mleti, Caucasus. L.-Lessing and Krikmeyer. Loewinson-Lessing, cf. N. J.,1899, II, p. 237. Andesite. Stavro Vouno, yEgina, Greece. A. Rchrig. H. S. Washington, J. G., Ill, p. 150,1895. Hornblende- andesite. A1 2 0 3 high. MgO low. Cap Marsa, Menerville, Algeria. Duparc and Pearce. Duparc, Pearce, and Ritter, Mem. Soc. Phys: Gen., XXXIII, No. 2, p. 89,1900. Hornblende- andesite. Cap Marsa, Menerville, ! Algeria. Duparc and Pearce. Duparc, Pearce, and Ritter, Mem. Soc. Phvs. Gen., XXXIII, No. 2, p. 84, 1900. Hvpersthene- andesite. Mean of 3. Sum low. I Cap Marsa, Menerville, Algeria. Duparc and Pearce. Duparc, Pearce, and Ritter, Mem. Soc. Phys. Gen., XXXIII, No. 2, p. 84, 1900. Hypersthene- andesite. Sum low. Mean of 3. Harrismith, Orange River Colony, South Africa. W. P. Jorissen. G. A. F. Molengraaf, N. J., 1894, . I, P- 82. Cordierite- vitrophvrite. Nightingale Island, Tristan d’Acunha, South Atlantic. C. Klement. A. Renard, Chall. Rep. Petr. Oc. Islands, p. 92, 1889. Andesite tuff. Sum high. Chemerin Kushkek, Elburz Mountains, Persia. E. Drasche. E. Drasche, Vh. Wien. G. R-A., 1884, p. 196. . Andesite. 428 CHEMICAL ANALYSES OF IGNEOUS ROCKS. ANDESITE—Continued. No. 93 A4 IV 94 A4. IV 95 B'2. Ill 96 D4. V 97 C3. V 98 A4. IV 99 A4. IV 100 A4. IV 101 D3. V 102 A3. Ill 103 A2. II 104 A2. II 105 A4. IV 106 A4. IV 107 B3. IV 108 B3. IV 109 B3. IV no D4. V 111 D4. V SiO, Al,O s FeA ' FeO MgO CaO Na 2 0 K 2 0 H 2 0-f h 2 o- co 2 Ti0 2 PA MnO Sum Sp. gr. | 55.10 19. 57 8.52 n. d. 2.01 5. 90 3. 67 4. 77 1.19 100.73 J- 50. 86 15. 65 10. 85 n. d. 6. 03 11. 76 2.01 1. 56 0. 20 0. 63 trace trace 99. 55 3. 01 | 59.70 16. 68 5. 43 2. 09 2. 35 5.20 2. 67 0. 99 0. 90 0.15 0. 98 100. 34 | 54.66 14. 79 8. 59 n. d. 0. 80 6. 08 3. 62 2.30 3. 93 0.10 0. 63 98. 95 J 61.28 18.16 5. 97 1. 76 0. 79 3. 55 5. 51 2. 75 1.72 trace 101.49 J 59. 87 17.23 9. 96 n. d. 0. 77 2. 96 6. 21 2. 92 0. 61 100.53 | 54.44 12. 90 7.08 n. d. 12. 75 5.12 2. 06 0. 35 5. 54 100.24 2. 75 j 53.18 16.18 10. 30 n. d. 6. 72 10.12 1. 85 0.35 1. 65 100. 35 2. 725 1^ GO o ic 21.98 5. 85 5. 09 1.38 9.12 2. 85 0. 22 0. 43 1.45 99.24 | 68.06 15. 03 0. 28 3. 66 0. 81 2. 71 4. 25 3. 41 2.12 ' 0.38 trace 100.71 | 66. 26 16. 31 3.38 1.36 1.66 2. 88 4.11 2.23 0.66 0. 38 100.74 2. 438 j 60.13 17. 41 4. 30 1.68 2. 27 3. 36 4. 88 2. 46 1.10 0. 40 100. 67 2. 607 | 57.76 18. 39 7. 51 n. d. 3. 34 6. 21 3. 63 2. 61 0. 94 100. 89 2. 664 j 53. 63 19. 59 5. 70 n. d. 3. 35 3. 53 3. 64 1.62 7.91 0. 96 trace 99. 93 j 57. 04 19. 51 5. 50 2. 71 none 8.16 2. 83 2.38 0. 20 2. 05 100. 38 2. 720 21° | 56. 76 21.10 4.52 3. 02 trace 9.01 2. 80 3.27 0.24 ■ trace 100. 72 2. 666 15° | 56.57 17. 82 2. 91 2. 65 trace 5.11 3. 09 2. 61 5.98 2.03 0. 84 99.61 2. 359 21° | 52. 60 18.30 12. 70 n. d. 4. 65 11.05 0. 67 0. 09 0. 06 100.12 | 51. 35 18. 20 14. 50 n. d. 3.10 10. 26 0. 84 0.16 0. 25 0.13 99. 25 INFERIOR ANALYSES. 429 ANDESITE—Continued. Inclusive. 1 Locality. Analyst. Reference. Author’s name. Remarks. Buhemin, Elburz Mountains, Persia. E. Drasche. E. Drasche, . Yh. Wien. G. R-A., 1884, p. 196. Augite-andesite. Perumbakan, Madras, India. T. H. Holland? T. II. Holland, Q. J. G. S., LIII, p. 409, 1897. Augite-andesite. so 8 s 0.95 2.25 Bandaisan, Japan. Shimidzu. T. Wada, Mt. D. Ges. Ost-As., V, p. 74, 1889. Andesite ash. Alkalies inter¬ changed, cf. N. J.; 1890, II, p. 102. Cl s. 0.29 3.16 Kirishimayama, Kiushiu Islands, Japan. M. Fesca. M. Fesca, Mt. D. Ges. Ost-As., YI, p. 347, 1896. Andesite ash. Incorrect in N. J., 1897, I, p. 288. Sulphur Island, Japan. J. Petersen. J. Petersen, Jb. Hamb. Wiss. Anst., VIII, p. 13, 1891. Augite-andesite. Sulphur Island, Japan. J. Petersen. J. Petersen, Jb. Hamb. Wiss. Anst., VIII, p. 15, 1891. Augite-andesite. Chichishima, Bonin Islands, Japan. Fukuda. Y. Kikuehi, J. Coll. Sci. Imp. U 11 . Jap., Ill, p. 73, 1890. Andesite. “Boninite” in Petersen, Jb. Hamb., W. Anst., VIII, p. 348, 1891. Ototoshima, Bonin Islands, Japan. Fukuda. A'. Kikuehi, J. Coll. Sci. Imp. Un. Jap., Ill, p. 73, 1890. Andesite-perlite. “Boninite” in Petersen, loc. cit., p. 348. Miyakashima, Bonin Islands, Japan. J. Petersen. J. Petersen, Jb. Hamb. W. Aust., VIII, p. 50, 1891. Mivakite. A1,0. high. MgO low. MnO high. Eruption, August, 1883, Krakatoa. A. Sell wager. K. Oebekke, N. J. 1884, II, p. 33. Andesite ash. CaS0 4 Sol. salts 0.62 0.89 Eruption, August, 1883, Krakatoa. • C. Winkler. • R. D. M. Verbeek, Krakatau, Batavia, 1884, p. 292. Andesite ash. CaS0 4 Sol. salts 1.57 1.11 Eruption, August, 1883, Krakatoa. C. Winkler. R. D. M. Verbeek, Krakatau, Batavia, 1884, p. 292. Andesite ash. Erupted block, December, 1876, Merapi, Java. A. Lagorio. A. Lagorio, T. M. P. M., VIII, p. 467, 1887. Andesite Saleijer Island, Celebes. ■ A. Wichmann. A. Wichmann, Nk. Tds. Ned. Ind., LIV, p. 261, 1895. Andesite tuff. Tanna Island, New Hebrides, Pacific Ocean. A. Liversidge. A. Liversidge, J. R. Soc. N. S. W., XX, p. 236, 1887. Lava. NoMgO? MnO high. * Tanna Island, New Hebrides. Pacific Ocean. A. Liversidge. A. Liversidge, J. R. Soc. N. S. W., XX, p. 237, 1887. Lava. A1 2 0 3 high? MgO low? New Britain, Pacific Ocean. A. Liversidge. A. Liversidge, J. R. Soc. N. S. W., XVI, p. 50, 1883. • Pumice. MgO? MnO high? Rotochu, Tarawera, New Zealand. • J. A. Pond. S. P. Smith, Eruption of Tarawera, Wellington, 1887, p. 76. Lapilli. CaO? Alkalies? S0 3 Cl 0.41 0.05 Pareheru, Tarawera, New Zealand. J. A. Pond. S. P. Smith, Eruption of Tarawera, Wellington, 1887, p. 76. Lapilli. CaO? Alkalies? 430 CHEMICAL ANALYSES OF IGNEOUS ROCKS. ANDESITE—Continued. No. SiO, Al,O g Fe-A FeO MgO CaO Na 2 0 K.,0 H 2 0+ H.,0 co 2 Ti0 2 PA MnO Sum Sp. gr. 112 ■ 50. 90 20. 00 14.10 n. (1, 2. 77 10. 38 0. 70 0.14 0.16 99.41 DL V J 113 ■ 55.12 20.41 7. 74 n. d. 2. 75 5. 35 3. 80 2. 50 3.13 100. 80 D4. V • GABBRO. 1 57. 00 16. 01 ii. d. 10. 30 1.62 6.20 4.35 3. 53 0.15 99. 16 B4. V 1 • 2 1 49. 93 24. 64 n. d. 2. 74 2. 43 6. 27 2.20 3. 80 1.20 6.01 99. 22 D4. V 1 3 49. 30 22. 46 12. 04 n. d. 2.14 9.30 3. 01 1.27 0. 78 100. 30 D4. V J 4 43. 35 29. 75 5. 61 n. d. 2. 03 12. 46 trace 5. 93 0. 73 99. 86 D4. V 1 r 5 1 45. 35 16.11 3. 42 3.50 12. 32 18. 04 (1.26) 100. 00 2. 992 B4. V 1 6 1 44.11 24.45 7.89 6. 52 3. 84 11.96 1.67 0. 22 0. 60 0. 51 trace 101.27 3.044 C3. V 1 7 l 38. 05 24. 73 5. 65 6. 08 11.58 1.25 2.54 1.94 7.53 0. 93 100.28 A3. HI 1 8 1 49.19 18. 71 5.03 4. 04 5. 92 7. 98 1.44 0. 77 5. 05 1.82 99. 95 A3. Ill 1 9 53.43 13. 81 5.08 9. 86 4. 64 8. 25 2.51 1.12 0.27 trace 98.97 D3. V J 10 1 50. 43 23. 83 17.63 n. d. 2. 46 4. 79 1. 66 0. 22 n. d. trace 98. 63 D4. V J 11 47. 43 23. 66 13. 06 n. d. 3.15 11.21 0.15 0.20 0. 90 99. 76 D4. V I 12 47.40 29. 74 n. d. 1.94 0. 57 13. 30 4. 99 1. 56 1.64 101.14 2. 704 C4. V 1 13 • i 45. 69 13. 30 1. 85 4. 72 13. 06 13.50 1.36 trace 2.47 2.29 1. 89 0. 06 0. 24 100. 86 A2. II J 14 1 45.43 12.55 n. d. 6. 50 13.41 12. 39 1.71 0.11 2. 74 2.41 2.35 0.04 0. 21 100. 09 A3. Ill J • 15 l 53. 46 13. 35 n. d. 16. 74 3.07 10. 94 n. d. n. d. 1.64 0. 80 100. 00 C4. V 1 • 16 1 39. 87 24. 30 1.59 4. 09 11.30 7. 61 1.93 1.11 8. 12 99. 92 2. 73 D4. V J INFERIOR ANALYSES. 431 ANDESITE—Continued. Inclusive. Locality. Analyst. Reference. Author’s name. Remarks. S0 3 0.22 Cl 0.04 Wairoa, Tarawera, New Zealand. J. A. Pond. S. P. Smith, Eruption of Tarawera, Wellington, 1887, p. 76. Andesitic lapilli. A1 2 0, high. CaO? Alkalies? Port Hills, Christ¬ church, New Zealand. R. Speight. R. Speight, Tr. N. Z. Inst., XXV, p. 369, 1893. Olivine-andesite. “Most trust wor¬ thy of 4 bad analyses.” GABBRO. Natural Bridge, Adirondack Moun¬ tains, New York. C. H. Smyth, jr. C. H. Smyth, jr., B. G. S. A., VI, p. 274, 1895. Gabbro. Rose town, west of Stonv Point, New York. L. M. Dennis. J. F. Kemp, A. J. S., XXXVI, p. 251, 1888. Hornblende- gabbro. A1 2 0 3 and Ti0 2 high. MgO low. Rosetown, west of Stony Point, New York. J. F. Kemp? J. F. Kemp, A. J. S., XXXVI, p. 249, 1888. Hornblende- gabbro. A1 2 0 3 high. MgO low. Rosetown, west of Stony Point, New York. L. M. Dennis. J. F. Kemp, A J S XXXVI, p. 250, 1888. Hornblende- gabbro. A1 2 0 3 high. MgO low. Alkalies? Gwinn’s Falls, Balti¬ more, Maryland. W. S. Bayley. G. H. Williams, B. U. S. G. S., 28, p. 37, 1886. Hypersthene- gabbro. Mount Hope, Balti¬ more, Maryland. L. McCay. G. H. Williams, B. U. S. G. S., 28, p. 37, 1886. Hypersthene- gabbro. Different in 15 A. R. U. S. G. S.,p. 673,1895. Sturgeon Falls, Menominee River, Michigan. R. B. Riggs. G. H. Williams, B. U. S. G. S., 62, p. 76, 1890. Gabbro. Altered. Lower Quinnesec Falls, Menominee River, Michigan. R. B. Riggs. G. PI. Williams, B. U. S. G. S., 62, p. 89, 1890. Gabbro-diorite. Schistose. Not fresh. Wind Lake, Minnesota. Dodge and Side- ner. M. E. Wadsworth, Bull. 2, G. Nh. S. Minn., p. 97, 1887. Gabbro. Duluth, Minnesota. J. A. Dodge. M. E. Wadsworth, Bull. 2, G. Nh. S. Minn., p. 75, 1887. Gabbro. Granite Falls, Minnesota. E. J. Babcock. C. W. Hall, B. U. S. G. S., 157, p. 89, 1899. Hypersthene- gabbro. Encampment Island, Minnesota. C. Palache. A. C. Lawson, Bull. 8, G. Nh. S. Minn., p. 6, 1893. Anorthosite. so 3 0.43 Bagley Canyon, Mount Diablo, California. W. H. Melville. W. H. Melville, B. G. S. A., 11, p. 404, 1891. Gabbro. “Shaly.” Not fresh. SOg c 0.24 trace Bagiev Canyon, Mount Diablo, California. W. H. Melville. W. H. Melville, B. G. S. A., II, p. 404, 1891. Gabbro. “Shaly.” Not fresh. St. Thomas, West Indies. J. Siemiradzki. J. Siemiradzki, N. J., 1886, II, p. 176. Corsite. Belhelvic, Aberdeenshire, Scotland. A. E. Brown. T. G. Bonney, Geol. Mag., XXII, p. 442, 1885. Troctolite. Not fresh. All determinations uncertain; cf. Ref. note. 432 CHEMICAL ANALYSES OF IGNEOCS ROCKS. GABBRO—Continued. No. Si0 2 AlA Fe 2 O s FeO MgO CaO Na 2 () K 2 0 H 2 0+ H 2 0- co 2 Ti() 2 I’A MnO Sum Sp. gr. 17 B4. V I 4 ' 2 ' 81 14.55 n. d. 20. 52 1.62 3.96 5. 57 2. 01 6. 38 0.40 1.90 0. 51 100. 23 18 D4. V | 43. 66 26. 79 5. 81 n. d. 5. 80 15. 64 1.97 0.55 1.76 0. 44 102. 42 19 D4. V | 48. 38 23. 66 8. 03 n. d. 6.58 11.02 2. 60 1.09 n. d. 101. 36 20 D2. V | 49. 90 23. 33 4.10 4. 38 1.65 10.97 3. 06 0. 62 0. 60 • 0.13 0. 42 0. 49 99. 97 • 21 C2. IV | 49. 48 20. 60 4. 23 3. 75 4.16 13. 07 2. 65 0. 21 0. 25 0.11 0.32 0. 87 99. 98 22 D3. V | 47. 75 22. 49 4. 53 3. 23 0.59 15. 99 0. 91 1. 75 0. 76 0. 48 1.53 100. 01 23 D4. V 1 47. 37 14. 65 13. 74 n. d. 0. 51 13. 27 3.58 1.29 1.09 - 4. 69 100.19 2. 635 24 C4. V | 46. 57 19. 56 n. cl. 5.82 9. 27 13. 29 3.24 0. 51 2. 88 101.14 25 D3. V J 50.95 7.21 1.29 7. 39 20. 31 6.13 5.53 1.03 0. 77 100. 61 (100. 66) 3.102 26 C4. V | 59.52 20.18 n. d. 6. 68 1.34 6. 81 2. 82 1.26 1.77 100. 38 27 C4. V | 55.19 20.24 n. d. 8.18 4. 97 8. 68 1.83 0. 27 0. 79 100.15 28 D4. V | 40. 49 16. 20 22.10 n. d. 7.04 14. 25 1.45 0.19 0.05 101. 77 29 1 B4. V l 48. 40 17. 53 n. d. 4. 28 16.51 11.11 1. 80 0. 76 100. 91 : 30 B3. IV | 47. 00 23. 67 2. 31 3. 20 8. 72 11.40 2. 40 0. 70 0. 62 trace 100. 02 31 B3. V | 41.55 21.40 11. 38 1.35 12. 20 7.80 0. 80 0.24 3. 65 trace 100. 87 32 D3. V J 38.47 18. 89 1.92 0. 78 4.33 30. 34 1.15 1.54 2.89 100. 31 3. 05 33 D2. V J 50.14 15.65 1.06 10.11 5.05 8. 62 2. 85 1.19 0.17 0.17 2.47 0. 38 0. 20 98. 86 34 C3. V | 42. 56 21.99 4.69 5.40 . 6. 69 17.06 1.67 0. 35 0.17 100. 58 35 C3. V J 38. 59 24. 37 7. 66 5. 23 5. 95 15.30 1.34 0.46 0! 84 99. 64 36 D3. V j 37. 82 19.94 3. 48 12. 70 10. 97 1 14. 71 1 1.68 n. d. 0.57 101. 82 INFERIOR ANALYSES. 433 GA BBRO—Continued. Inclusive. Locality. Analyst. Reference. Author’s name. Remarks. Cataclews Point, Cornwall. J. J. Beringer. H. Fox, Tr. R. G. Soc. Cornw., XII, p. 71, 1896. Biotite-plagioclase rock. Not fresh. Dramont, Esterel, France. Ritst. A. Michel Levy, B. Serv. Cte. G. Fr., No. 57, p. 36, 1897. Inclusion in ester- ellite. Kullen, Sweden. A. Hen nig. A. Hennig, cf. N. J., 1900, I, p. 224. Gabbro. FeSo 0.32 Fuchstein, Oberkaims- bach, Hesse Darm¬ stadt. \V. Sonne. C. Chelius, Nb. Ver. Erdk, XVIII, p. 24, 1897. Olivine-gabbro. FeS, 0.28 Yierstock, Kaimsbach, Hesse Darmstadt. Not stated. C. Chelius, Erl. G. Kte. Hesse., V, p. 20, 1897. Olivine-gabbro. Frankenstein, Hesse Darmstadt. F. W. Schmidt. Chelius and Klemm, Erl. G. Kte. Hesse., IV, p. 39, 1896. Olivine-gabbro. Eichberg, Hesse Darm¬ stadt. F. W. Schmidt. C. Chelius, Erl. G. Kte. Hesse., I, p. 18, 1886. Gabbro. MnO high. Rosswein, Saxony. Sachsse and Becker. Sachsse and Becker, cf. N. J., 1893, II, p. 503. Gabbro. Student Eule, Bohemia. V. Stanek. E. Radi, cf. N. J., 1899, II, p. 58. Gabbro. A1.,0 3 low. MgO high. Na 2 0 high? Mount Pilis, Zemplen Comitat, Hungary. Petrik. J. v. Szadeczky, Y K * XXI,’ p. 268, 1891. Labradorite. Mount Pilis, Zemplen Comitat, Hungary. Petri k. J. v. Szadeczky. F. K., XXI, p. 272, 1891. Augitic labradorite. Jablanica, Herzegowina. C. v. John? C. v. John, Jb. Wien, G. R-A., XXXVIII, p. 352, 1888. Gabbro. FeS 2 0.52 Mount Collon, Arolla, Switzerland. A. Brunet. A. Brun, cf. N. J., 1897, I, p. 475. Gabbro. Mt. Collon, Arolla, Switzerland. A. Brunet. A. Brun, cf. N. .T., 1897, I, p. 475. Gabbro. F trace FeS 2 0.50 Mt. Collon, Arolla, Switzerland. A. Brunet. A. Brun., cf. N. J., 1897, I, p. 475. Gabbro. Cl 0.08 S 0.31 X 0.41 Stazzona, Orezza, Corsica. M. Oels. M. Oels, cf. N. J., 1896, I, p. 46. Gabbro. Goroschki, Wolhynia, Russia. W. Tarassenko. W. Tarassenko, cf. N. J., 1899, I, p. 463. Olivine-gabbro- norite. Supreya, N. Ural Mountains, Russia. Loewinson- Lessing. Loewinson-Lessing, G. Sk. Jushno. Dorpat, 1900, p. 166. Magnetite-gabbro. Light bands A1 2 O s high. Deneshkin Kamen, N. Ural Mountains, Russia. Loewinson- Lessing. Loewinson-Lessing, G. Sk. Jushno. Dorpat, 1900, p. 166. Magnetite-micro- gabbro-diorite. Al,O s high. Supreya, N. Ural Mountains, Russia. Loewinson- Lessing. Loewinson-Lessing, G. Sk. Jushno. Dorpat, 1900, p. 166. Magnetite-gabbro. Dark bands. 14128 — No. 14—03 - 28 434 CHEMICAL ANALYSES OF IGNEOUS ROCKS GABBRO—Continued. No. Si0 2 A1A Fe-A FeO MgO CaO Na.,0 K.,0 h 2 o+ h 2 o- co 2 Ti0 2 P 2 () 5 MnO Sum Sp. gr. 37 A3. Ill j 45. 97 18.18 5. 95 2. 30 7.50 8. 29 4.10 0. 75 6. 50 trace 99. 54 2. 870 15° 38 A3. III | 39. 30 18.58 8.88 1 * 1.61 4. 09 16. 82 6. 01 0. 42 4. 72 - 0.13 trace trace 100.56 3.122 15° 39 A3. III j 39.12 2. 44 5. 68 1.70 37. 08 0.30 1.29 0. 42 11.70 99. 73 2.649 15° NORITE. 1 1)3. V 2 D3. V 3 D3. V 4 D4. V 5 A4. IV 6 B3. IV 7 C4. V 8 D2. V 9 B4. V 10 B4. V 11 D4. V 12 D3. V | 40. 61 25. 90 2.18 5. 37 7.69 14. 50 2.31 0. 25 0. 78 . 0. 65 100. 24 2. 91 J 64. 04 2.11 2. 81 22.14 4. 04 0. 60 0.30 0.11 0. 67 3.73 100. 55 | 58. 94 2. 72 3. 01 22. 94 4. 74 0. 71 0.24 0.09 3. 35 3. 72 100.46 | 65.17 21.04 0. 74 n. d. 0. 04 1.20 9. 20 1. 70 0. 80 trace 99. 89 • 1 51. 80 26. 42 11.08 n. d. 5. 08 1.45 3.13 0. 24 0.84 100. 04 j 51. 30 25. 20 2. 91 2.39 4.01 2.50 3.82 »0. 79 0. 55 99.47 2. 88 J 49.38 28. 03 12. 32 n. d. 3. 50 2. 73 3. 49 0. 93 0.64 101.02 2. 92 j 52. 28 23. 30 4. as 3. 25 3. 02 5. 01 3. 95 1.51 n. d. 1.80 0. 80 100. 22 | 52. 21 19. 24 10. 46 n. d. 2. 36 7. 28 3. 48 1.09 n. d. 3.12 1.21 100.45 | 49. 89 24. 39 6. 09 n. d. 3.91 9. 61 5.30 0. 29 1.22 100. 70 | 50.45 6. 50 2. 49 8.38 19. 02 7.82 n. d. n. d. 0. 97 0. 63 trace trace 96. 26 I 36 - 81 14.32 7. 38 15. 25 10. 49 17. 23 2. 06 0.37 5. 25 2.30 0.18 100. 62 3. 08 INFERIOR ANALYSES. 435 (i ABBRO—Continued. Inclusive. Locality. Analyst. Reference. Author’s name. Remarks. Laurium, Attika, R. Lepsius. R. Lepsius, Hornblende-gabbro. Not fresh. Greece. Geol. v. Attika, Berlin, 1893, p. 102. Plaka, n. Laurium, R. Lepsius. R. Lepsius, Gabbro. Not fresh. Greece. Geol. v. Attika, Berlin, 1893, « p. 97. Kaisariani, Mount R. Lepsius. R. Lepsius, Olivine-gabbro. • Not fresh. Ser- Hymettos, Greece. • Geol. v. Attika, Berlin, 1893, pentinized. p. 99. NORITE. ZrO., BaO SrO 0.07 none none Monhegan Island, Maine. E. C. E. Lord. E. C. E. Lord, A. G., XXVI, p. 340, 1900. Olivine-norite. A1 2 0 3 high. Muscovado Lake, Cook County, Minnesota. A. D. Meeds. N. 11. Winchell, 23 A. R. G., Nh. S. Minn., p. 212, 1895. Norite. Igneous? Not fresh? Same as next. Muscovado Lake, Cook County, Minnesota. A. I). Meeds. N. II. Winchell, 23 A. R. G., Nh. S. Minn., p. 212, 1895. Norite. Igneous? Not fresh. Same as above. San Diego, California. Not stated. L. V. Chrustchoff, cf. N. J., 1886, II, p. 57. H yperite. A1 2 0 3 high. FeO and MgO low. Le Pallet, Loire Infer., France. # Not stated. A. Lacroix, B. Serv. Cte. G. Fr., LXVII, p. 23, 1899. (Cordierite?) Norite. Contact meta¬ morphism. Prinaux, France. A. Lacroix. A. Lacroix, B. Serv. Cte. G. Fr., LXVII, p. 23, 1899. Cordierite-norite. Contact meta- morphism. Le Pallet, Loire Infer., France. Not stated. A. Lacroix, B. Serv. Cte. G. Fr., LXVII, p. 23, 1899. Garnet-norite. Contact meta¬ morphism. Theingsvaag, Soggendal, Norway. C. F. Kolderup. C. F. Kolderup, Berg. Mus. Aarb., 1896, No. 5, p. 142. Quartz-norite. Al-As high. MgO low. Rekefjord, Norway. C; F. Kolderup. C. F. Kolderup, Berg. Mus. Aarb., 1896, No. 5, p. 79. Quartz-norite. Birkrem, Norway. C. F. Kolderup. C. F. Kolderup, Berg. Mus. Aarb., 1896, No. 5, p. 96. Norite. Facies of gran¬ ite. Sone River, S. Rewa, India. P. Briihl. T. H. Holland, Rec. G. S. Ind., XXX, p. 20, 1897. Olivine-norite. Alkalies not de termined. Duluth, Minnesota. A. N. WinChell. A. N. Winchell, A. G., XXVI, p. 284. 1900. Troctolite. A1,Oq or CaO high? 430 CHEMICAL ANALYSES OF IGNEOUS BUCKS. No. Si0 2 Al,0 :i 1 B2. Ill 2 B2. Ill 3 B4. V 4 B4. V 5 D4. V 6 C4. V 7 B3. IV 8 B4. V 9 C4. V 10 B4. V 11 B4. V 12 A4. IV 13 D4. V 14 A4. IV 15 A4. IV 16 % D4. V 17 B4. V 18 Al. I 19 A4. IV 41.15 39. 32 13.51 Fe 2 0 3 2. 32 14. 48 2. 01 44.44 23.19 12.70 50. 89 ! 15. 39 i 5. 77 44. 51 i 19.99 45.46 19.94 51.46 1 13.98 50.61 18.34 52. 06 13. 67 51.08 1 23.58 47. 87 14. 43 45. 73 42. 07 37. 09 43. 62 39. 55 13. 48 32. 05 13.19 17.30 7. 22 15. 36 43.41 19.42 5.72 44.86 ! 17.24 11.12 2. 66 50.81 ! 13.25 14.66 n. d. 15. 97 6. 85 11.55 11.60 9. 83 35. 69 14.13 28.76 ! 16.80 DIABASE. FeO MgO CaO Na,0 K,0 H 2 0-f h 2 o co 2 Ti0 2 PA MnO Sum Sp. gr. 8.63 10.09 I 8. 75 3. 21 1.22 3.05 5. 54 1. 60 0. 61 1.28 100. 96 8. 73 11.11 8.30 3. 76 0. 87 2.57 5. 25 , 1.70 0.61 0. 71 99. 42 n. d. 2. 82 6. 03 3.93 1. 75 3. 73 0. 70 0.52 99. 81 n. d. 7. 60 8. 75 5. 67 2. 72 2. 46 99. 25 n. d. 8.11 8.15 5. 24 2. 60 2. 93 • 98. 75 n. d. 2. 95 8.32 2.12 3. 21 2.30 • 99. 66 6. 69 5. 98 9.11 4.39 0. 47 3. 00 2. 00 0. 35 100. 54 n. d. 4.98 7. 53 1.50 2. 81 2. 44 inll.,0 6. 66 0.41 trace 99. 55 « 8. 92 7.59 10.49 4. 75 n. d. 1.06 0.17 101.08 n. d. 6. 97 10. 96 0. 76 1. 71 0. 88 100. 00 13. 91 6. 73 7.01 . 1.60 1.08 1.72 100. 00 n. d. 5.01 8.15 3.36 0. 86 1.05 100.13 2. 953 n. d. 4.95 9. 36 2. 34 n. d. 0.39 100. 00 n. d. 10. 58 10.45 3.47 0. 61 1.82 100. 78 n. d. 15.40 9. 92 3.24 0. 47 0.94 100. 78 3.026 n. d. 1.38 0. 95 1 , 11 12.13 0. 48 100. 00 n. d. 0. 57 0. 41 1.75 0. 33 11. 83 100. 86 6. 83 2.34 1.63 3.45 3. 03 2. 93 0. 3Q 2. 75 1.34 trace 99. 74 n. d. 0.59 0. 37 trace trace 13. 26 ! 0.64 1 0. IQ i trace i 100.07 INFERIOR ANALYSES. 437 DIABASE. Inclusive. Locality. Analyst. Reference. Author’s name. Remarks. Auburn, Maine. Packard. G. P. Merrill, A. G., X, p. 54, 1892. Diabase. Not fresh. Lewiston, Maine. Packard. G. P. Merrill, A. G., X, p. 54, 1892. Diabase. Not fresh. Medford, Massachusetts. G. P. Merrill? G. P. Merrill, B. G. S. A., VII, p. 353, 1896. Diabase. Not fresh. Cf. No. 5, an- dose. Indian Point, Upper Chateaugay Lake, New York. A. S. Eakle. A. S. Eakle, A. G., XII, p. 35, 1893. Diabase. Upper Chateaugay Lake, Clinton County, New York. A. S. Eakle. A. S. Eakle, A. G., XII, p. 35, 1893. Diabase. Palmer Hill, Essex County, New York. J. F. Kemp. Kemp and Marsters, B. U. S. G. S., 107, p. 26, 1893. Diabase. Keene Valley, Adiron¬ dack Mountains, New York. A. R. Leeds. Leeds and Julien, 30 A. R. N. Y. Surv., p. 102, 1867. Diabase. Cf. Kemp and Marsters. B.U.S.G.S.,107, p. 26, 1893. Fort Montgomery, Hudson River, New York. L. M. Dennis. J. F. Kemp, Am. Nat., 1888, p. 694. Hornblende- diabase. Ti0 2 high. Rocky Hill, New Jersey. A. H. Phillips. A. H. Phillips, A. J. S., VIII, p. 279, 1899. Diabase. Little Falls, Passaic County, New Jersey. W. C. Day. W. C. Day, 20 A. R. U. S. G. S., VI, p. 419, 1899. Diabase. Calc, to 100$? Mine Brook, Somerset County, New Jersey. T. B. Stillman. W. C. Dav, 20 A. R. U. S. G. S., VI, p. 419, 1899. Diabase. Calc, to 100%? Pittsylvania County, Virginia. T. L. Watson. T. L. Watson, A. G., XXII, p. 87, 1898. Quartz-diabase. Chatham, Pittsylvania County, Virginia. T. L. Watson. T. L. Watson, A. G., XXIV, p. 360, 1899. Diabase. A1 2 0 3 high, Fe 2 0 3 low. Chatham, Pittsylvania County, Virginia. T. L. Watson. T. L. Watson A. G., XXII, p. 87, 1898. Olivine-diabase. Not fresh. Chatham, Pittsylvania County, Virginia. T. L. Watson. T. L. Watson. A. G., XXII, p. 87, 1898. Olivine-diabase. Chatham, Pittsylvania County, Virginia. T. L. Watson. T. L. Watson, A. G., XXIV, p. 360, 1899. Diabase. Not fresh. Chatham, Pittsylvania County, Virginia. T. L. Watson. T. L. Watson, A. G., XXII, p. 87, 1898. Olivine-diabase. Not fresh. Cr 2 0 3 none NiO none BaO 0.09 SrO trace Li 2 0 trace Near Boone, Watauga County, North Caro¬ lina. II. N. Stokes. A. Keith, B. U. S. G. S., 168, p. 53, 1900. Metamorphosed amygdaloid. Cr»0 3 trace Wadesboro, North Carolina. T. M. Chatard. 1 I. C. Russell, B. U. S. G. S., 52, p. 18, 1889. Diabase. Not fresh. 438 CHEMICAL ANALYSES OF IGNEOUS HOCKS No. 20 B4. V 21 D4. V 22 D4. V 23 D4. V 24 D4. V 25 Al. I 26 B2. Ill 27 Al. I 28 Al. I 29 B4. V 30 D4. V 31 D4. V 32 B2. Ill 33 D2. V 34 D4. V 35 A2. II 36 1)4. V 37 C4. V 38 A4. IV DIABASE—Continued. Si0 2 A1A Fe 2 O s FeO MgO CaO Nad) K 2 0 ti 2 c+ | 49.90 16.32 n. d. 13.54 6. 22 6. 58 1.82 2. 25 0. 76 | 48.08 23. 67 9.07 n. d. 3. 92 10. 99 1. 92 0. 49 0. 83 j 47. 50 22. 44 7.40 n. d. 3. 71 10. 21 1.62 1.29 2. 85 j 47. 84 25. 40 6.72 n. d. 5. 25 8. 44 2. 55 0. 60 2. 53 J 47. 83 30. 28 4.57 n.d. 4.32 6. 72 1.30 trace 2.05 | 46. 85 22. 62 5.12 1.58 2. 01 1.25 0. 80 2. 66 8.25 | 41. 60 37. 20 3. 21 0.30 0. 02 0. 23 0. 07 13.54 1 54. 66 15. 85 1.82 5.12 5.64 8. 75 3. 46 0.47 2. 48 | 45. 74 ) 5. 29 0.13 2. 06 0. 94 23. 85 0.11 1. 29 1.07 i 46. 28 1 12. 96 4. 67 6. 06 8.71 10.12 3. 75 3.34 l 45.59 ) 20. 99 2. 49 4. 36 8. 95 7. 57 4. '89 5.06 \ 44.71 15. 54 3. 06 6. 43 6. 80 10. 50 2. 55 5. 90 I • 46. 98 14. 94 5.01 4. 88 6. 86 5.40 3. 52 1.10 4. 48 1 54. 21 f 21.32 2. 35 4. 45 4. 77 8. 99 1.79 0. 74 none j 51.19 24. 52 1.46 4. 67 5. 33 9. 58 2.09 0. 60 0.30 | 49. 80 13.93 2. 24 8. 07 8. 85 7.96 2. 02 0.19 2. 20 | 53. 55 15. 54 15. 79 n. d. 5. 79 6. 71 1.41 1.96 1.83 | 51.85 13. 50 16. 43 n. d. 5. 49 8. 80 3.10 0. 91 0. 93 j 53. 70 18.21 10. 64 n. d. 5. 24 6. 66 2. 65 0. 99 1.55 H 2 0- co 2 TiO a P-A MnO Sum Sp. gr. 1.47 0.17 trace 99.03 3. 026 1.11 100. 08 3. 030 0. 34 97. 36 2. 927 0. 94 100. 27 3. 080 2.19 • . 99. 26 3. 028 3.12 1.89 1.12 0.16 2.54 ■ 100.15 0. 29 0.38 3. 79 0.14 0.08 100. 85 0. 25 0.39 0.67 0.15 0.18 100. 02 0. 22 18. 91 0. 36 0. 07 0.26 100. 79 3.54 trace 99. 43 2. 921 99. 90 2. 707 2. 88 trace 98. 37 2. 858 5. 39 0. 42 0. 49 99. 47 2. 703 • 0.04 1.49 0. 01 0.21 100. 37 3.010 none 0. 40 0.01 trace 100.15 OO 5C oi 4. 87 0. 08 trace trace 100. 21 102. 58 3.02 101.01 99. 64 I INFERIOR ANALYSES. 439 DIABASE—Continued. Inclusive. Locality. Analyst. Reference. Author’s name. Remarks. Blezard Mine, Sudbury, Ontario. T. L. Walker? • T. L. Walker, Q. J. G. S., LIII, p. 56, 1897. Diabase. Whitefish Bay, Rainy Lake, Canada. F. T. Shutt. A. C. Lawson, A. G., VII, p. 161, 1891. Diabase. A1 2 0 3 high. 30 feet from con¬ tact. Whitefish Bay, Rainy Lake, Canada. F. T. Shutt. A. C. Lawson, A. G., VII, p. 161, 1891. Diabase. Sum low. A1 2 0 3 high. At contact. Stop Island, Rainy Lake, Canada. F. T. Shutt. A. C. Lawson, A. G., VII, p. 158, 1891. Diabase. A1 2 0 3 high. 4 feet from con¬ tact. Stop Island, Rainy Lake, Canada. F. T. Shutt. A. C. Lawson, A. G., VII, p. 158, 1891. Diabase. A1 2 0 3 high. At contact. NiO BaO 0.08 0.10 Section 13, T. 47 N., R. 46 W., Penokee Gogebic Region, Michigan. T. M. Chatard. C. H. Van Hise, M. U. S. G. S., XIX, p. 357, 1892. Diabase. Altered. Cf. No. 18 auvergnose. BaO trace Aurora Mine, Penokee Gogebic Region, Michigan. T. M. Chatard. C. II. Van Hise, M. U. S. G. S., XIX, p. 357, 1892. Diabase. Altered. FeSo NiO" BaO SrO LioO 0.09 trace? 0.04 trace none Butte County, Cali¬ fornia. W. F. Hille- brand. H. W< Turner, 14 A. R. U. S. G. S., II, p. 473, 1894. Diabase-tuff. FeS., BaO" SrO LioO 0.49 trace none trace North Station Mine, Nevada County, Cali¬ fornia. W. F. Hille- brand. W. Lindgren, 17 A. R. TJ. S. G. S., II, p. 149, 1896. Diabase. Altered wall rock. Point Bonita, Marin County, California. F. L. Ransome. F. L. Ransome, B. Dep. G. Un. Cal., I, p. 106, 1893. Diabase. K 2 0 calc, as Na 2 0. Point Bonita, Marin County, California. F. L. Ransome. F. L. Ransome, B. Dep. G. Un. Cal., I, p. 106, 1893. Diabase. K.,0 calc, as Na 2 0. Point Bonita, Marin County, California. F. L. Ransome. F. L. Ransome, B. Dep. G. Un. Cal., I, p. 106, 1893. Diabase. K 2 0 calc, as Na 2 0. Sum low. Miahuatlan, Oaxaca, Mexico. A. Rdhrig. H. Lenk, in Felix and Lenk, Btr. G. Mex., II, p. 123, 1899. Olivine-diabase. Not fresh. S trace Average sample, Deme- rara River, British Guiana. Assistant of J. B. Harrison. J. B. Harrison, Rep. G. Ess. River, p. 64, 1900. Diabase. A1 2 0 3 high. Dried at 110°. S trace Average sample, Potaro River, British Guiana. Assistant of J. B. Harrison. J. B. Harrison, Rep. G. Ess. River, p. 64, 1900. Diabase. A1 2 0 3 high. Dried at 110°. S none Caman’s, Barama River, British Guiana. J. B. Harrison. J. B. Harrison, Rep. G. N. W. Distr., II, p. 12, 1898. Diabase. Not fresh. Hapueu, Sao Paolo, Brazil. Not stated. F. de P. Oliveira, cf. N. J., 1891, II, p. 304. Diabase. Sum high. Bufao, Sao Paolo, Brazil. Not stated. F. de P. Oliveira, cf. N. J. 1891, II, p. 304. Diabase. High Green, Belling¬ ham, England. J. E. Stead. J. J. H. Teall, Q. J. G. S., XL, p. 240, 1884. Diabase. 440 CHEMICAL ANALYSES OF IGNEOUS ROCKS. DIABASE—Continued. No. Si0 2 A1,0 3 Fe 2 O s FeO MgO CaO Na 2 0 K 2 0 H 2 0 + H,0— 39 A4. IV j 51. 20 20. 03 7. 57 n. d. 6. 75 10. 52 1.71 0.51 1.70 40 B4. V J 36. 80 22. 95 n. d. 4. 08 2.85 9. 73 0. 50 1.10 7. 70 41 D4. V J 51. 20 17.34 12. 43 n.d. 4.71 6. 35 3. 28 1.92 2. 77 42 B4. V J 52. 81 19. 83 11.89 n.d. 5. 32 0. 95 3. 54 2. 71 3.10 43 C3. V j 52. 91 21. 77 3.47 4.30 2.19 6. 82 4. 93 2. 51 0. 91 44 A4. IV J 52. 69 18. 93 10. 99 n. d. 2. 56 5. 31 4.04 2.11 2. 76 45 A4. IV | 50. 95 17.50 14. 42 n. d. 2. 63 6. 85 3. 38 1. 65 2. 02 46 A4. IV | 50. 65 18. 45 13. 80' n. d. 2. 68 6. 22 3. 71 1.92 2. 02 47 A4. IV 48 j 49. 20 ] 19.13 13. 60 n. d. 3. Q8 7.18 3. 63 1. 89 1.31 A4. IV 47. 97 11.26 9. 09 5. 46 3. 95 11. 76 5. 14 2. 54 49 D2. V | 46. 54 16. 88 3. 20 7. 41 9. 77 9.54 3.14 0. 63 0. 69 50 D3. V J 49. 36 18. 52 3. 91 10.13 3.37 7. 55 3. 45 1.89 0.80 51 D3. V j- 49.17 14. 59 3. 91 12. 94 4. 32 8. 78 3. 68 0. 79 0. 58 -52 B3. IV 1 46. 50 13. 54 12. 39 7. 04 6. 30 9. 60 2. 09 1.83 53 B3. IV J 46. 38 12. 86 12. 08 8.04 6.22 10. 55 2.13 1. 80 54 B3. IV j 46. 32 12. 81 13. 06 7. 93 6. 97 9. 03 2.13 1.74 55 B3. IV | 45. 75 12. 41 13. 23 8.23 5. 07 11.41 2.18 1. 71 56 B3. IV j 45. 68 11.96 12. 78 8. 77 5. 60 11.21. 2.11 1. 88 57 B3. IV | 43. 74 11.99 17.64 12. 20 4. 39 7. 61 2.19 1.80 58 D'2. V j 52. 40 19. 47 4.15 3. 80 2. 26 8. 60 4. 45 1.11 2. 77 Ti0 2 PA MnO Sum 99.99 2. 60 0. 75 trace 100. 96 1.08 1.27 102. 35 100.15 99. 32 0. 60 0. 80 • 100. 79 0.50 0. 78 100. 68 0. 50 0. 78 100.73 0. 56 0. 75 100.33 1.68 99. 72 0. 96 trace 98. 76 98. 98 98. 76 99. 29 100.63 99. 99 99.94 99. 99 100. 56 0.19 1.98 101.61 Sp. gr. 2. 885 INFERIOR ANALYSES. 441 I) IA BASE—Conti nu ed. Inclusive. S 0 3 0.43 Locality. Analyst. Reference. Author’s name. Morpeth, England. J. E. Stead. J. J. H. Teall, Q. J. G. S., XL, p. 239, 1884., Diabase. Newhalls, Queens- ferry, Scotland. E. Stecher. E. Stecher, T. M. P. M., IX, p. 190, 1898. White trap. Pelvoux, France. P. Termier. P. Termier, C. R., CXXIV, p. 635, 1897. Diabase. Pelvoux, France. P. Termier. P. Termier, C. R., CXXIV, p. 635, 1897. Diabase. Holmestrand, Kristi- ania Fjord, Norway. G. Sarnstrom. W. C. Brogger, Z. K., XVI, p. 28, 1890. Diabase-porphyrite. Kullen, Sweden. L. G. Thome. A. Hennig, cf. n. j: 1901, II, p. 59. Kullaite. Molle, Kullen, Sweden. L. G. Thome. A. Hennig, cf. N. J. 1901, 11, p. 59. Konga diabase. Bokebolet, Kullen, Sweden. L. G. Thome. A. Hennig, cf. N. I. 1901, II, p. 59. Konga diabase. Tanga, Kullen, Sweden. L. G. Thome. A. Hennig, cf. N. J. 1901, II, p. 59. Olivine-diabase. Ottfjall, Sweden. P. J. Holmquist. P. J. Holmquist, G. F. F., XVI, p. 190, 1894. Diabase. Krustorp, Brefven, Sweden. K. Winge. K. Winge, (t f f VXlil, p. 195, 1896. Olivine diabase. Foglo, Aland, Finland. H. Berghell. B. Frosterus, Finl. G. Und., Bl. 25, p. 23, 1894. Diabase. Foglo, Aland, Finland. H. Berghell. B. Frosterus, G. F. F., XV, p. 285, 1893. Diabase. Sundholm, Nystad, Finland. Not stated. H. Gylling, Finl. G. Und., Bl. 12, p. 55, 1888. Diabase. Padoi, Letala, Finland. Not stated. H. Gylling, Finl. G. Und., Bl. 12, p. 55, 1888. Diabase. Leinmaki, Letala, Finland. Not stated. H. Gylling, Finl. G. Und., Bl. 12, p. 55, 1888. Diabase. Rautavuori, Letala, Finland. Not stated. H. Gylling, Finl. G. Und., Bl. 12, p. 56, 1888. Diabase. Heuru, Honkilahti, Finland. Not stated. H. Gylling, Finl. G. Und., Bl. 12, p. 56, 1888. Diabase. Kivijarvi, Eura, Finland. Not stated. H. Gylling, Finl. G. Und., Bl. 12, p. 56, 1888. Diabase. Balkhausen, Hesse Darmstadt R. Marzahn. Chelius and Klemm, • Erl. G. Kte. Hesse, IV, p. 37, 1896. Diabase. Remarks. Not fresh. Sum high. Not fresh. A1 2 0 3 high. -Ignited before analysis. Ignited before analysis. Ignited before analysis. Ignited before analysis. Ignited before analysis. Ignited before analysis. Not fresh. P,0 5 high. 442 CHEMICAL ANALYSES OF IGNEOUS ROCKS DIABASE—Continued. No. Si0 2 Al-A FeA FeO MgO CaO ; Nad') k 2 o H 2 0+ H 2 0- co 2 Ti0 2 FA MnO Sum Sp. gr. 59 A3. Ill | 61. 03 21.41 4. 81 1.47 0.56 2. 54 4.44 2. 20 1.04 0.16 99. 99 60 A3. Ill j 44.28 18. 72 4. 01 10.24 7. 64 7. 55 3.49 0. 74 1. 75 0. 67 0. 93 100. 43 61 A3. Ill | 48. 40 15. 33 2. 66 11.04 7. 06 4. 61 1.89 1.39 3. 25 4. 94 100. 57 62 C3. V | 47. 89 12. 07 5. 73 11.08 6. 56 4. 94 2.14 1.37 2. 99 6. 53 101.30 63 C‘2. IV j 45. 83 15.43 3.04 7.96 6.19 5.92 2. 32 2.19 3. 67 3. 95 1.61 0. 29 99.10 2. 756 64 A2. II | 45. 81 14. 92 1.99 6. 52 7. 62 9.32 4. 54 0. 31 4.11 3. 88 0. 70 0.11 99. 89 2. 814 65 A2. II | 49. 03 12. 63 3.68 10.94 1.64 7. 76 2. 33 2. 40 3. 42 3.45 2. 06 0. 54 100. 39 2. 82 66 A2. II | 44. 70 14.12 0.97 8. 85 6. 07 10. 20 2.34 0.14 4. 79 5. 50 1.71 0.15 99. 86 2. 84 67 A4. IV 1 55.95 19. 47 4.09 1.08 4. 24 7. 84 2. 64 3. 78 1.60 100. 69 2. 806 68 C2. IV ! j 50. 03 15.46 4. 25 6.19 7. 73 8. 25 2. 82 1.48 4. 28 inH 2 0 0. 29 0. 53 101. 31 69 A3. Ill | 46. 95 17.40 6.11 3. 99 5.34 7. 25 4. 26 1.18 5.00 2. 33 99. 81 70 D3. V j 45.98 19. 93 8. 62 6. 04 5.46 6. 29 3. 41 1.29 2.40 99.42 71 A4. IV | 44.45 14. 02 14.24 n. d. 9. 45 6. 54 6. 72 0. 83 4.14 0. 45 0. 32 101.16 2.63 72 A3. Ill | 49.62 13. 47 4. 72 10. 21 9.18 6. 22 1.03 0. 43 5. 02 0. 16 0.51 100.57 2. 723 15° 73 D3. V | 48.15 20. 28 1.31 10. 01 6.34 0. 71 5. 30 1.35 6.34 99. 79 2. 72 r i i 4 D4. V l 49.92 14.84 11.93 n. d. 3. 84 10. 50 5. 72 3. 25 10O. 00 75 C4. V | 49. 71 17.45 6. 56 n. d. 7.01 10. 76 3.74 3.24 1.82 101. 29 76 A4. IV | 49.19 16. 83 1.96 8.15 7.50 12.38 3.24 n.d. 1.41 100. 66 i l A4. IV J 45. 78 21.23 9.57 n. d. 5.81 8. 06 3. 57 2. 71 3. 45 100.18 78 A4. IV J 48. 31 18.51 14. 53 n. d. 4.45 5.40 3. 42 1.82 3. 88 100. 32 INFERIOR ANALYSES. 443 DIABASE—Continued. Inclusive. Locality. Analyst. Reference. Author’s name. s 0.33 Ruppertshain, Taunus Mountains, Rh. Prussia. L. Milch. L. Milch, Z. D. G. G., XLI, p. 432, 1889. Diabase. s 0.41 Rauenthal, Taunus Mountains, Rh. Prussia. ■ L. Milch. L. Milch, Z. D. G. G., XLI, p. 430, 1889. Diabase. Near Ronneburg, Thuringia. C. A. Muller. C. A. Muller, Inaug. Diss. Gera, 1884, p. 32. Diabase. Near Ronneburg, Thuringia. C. A. Muller. C. A. Muller, Inaug. Diss. Gera, 1884,p. 31. Diabase. so 3 Org. 0.15 0.55 Thalexweiler, Blatt Lebach, Prussia. Not stated. Weiss and Grebe, Erl. G. Kte. Pr. Bl. Lebach, p. 38, 1889. Diabase. S 0.06 Blatt Allendorf, Prussia. Not stated. F. Beyschlag, Erl. G. Kte. Pr. Bl. Allendorf, p. 11, 1886. Diabase. so 3 0.51 Garkenholz, Rubeland, Harz Mountains. K. Bottcher. K. A. Lossen, Z. D. G. G., XL, p. 204, 1888. Hysterobase. so 3 Org. 0.24 0.08 Wendefurt, n. St. Wendel, Harz Mountains. K. Gremse. K. A. Lossen, Jb. Pr. G. L-A., X, p. 266, 1892. Leucophyr. Zahbelic, Prague, Bohemia. J. Nevole. B. Macha, cf. N. J., 1901, I, p. 60. • Diabase (spessartite-like). Podbaka, Moldauthal, Bohemia. Strnad. J. Klvana, cf. N. J., 1898, I, p. 485. Olivine-diabase. ' Radotin, Bohemia. C. F. Eichleiter. C. F. Eichleiter, Vh. Wien. G. R-A., XXXIII, p. 350, 1899. Diabase. Galleno, Adamello, Tyrol. C. Riva. C. Riva, cf. N. J., 1887, II, p. 65. Diabase. Nozza, Yal Sabbia, Piedmont. C. Riva. C. Riva, Rend. Inst. Lomb., XXVI, p. 433, 1893. Olivine-diabase. Rossena, Reggio Emilia, Italy. L. Ricciardi. L. Ricciardi, separate from ? Diabase. Ajaccio, Corsica. M. Gels. M. Oels, cf. N. J., 1896, I, p. 47. * Diabase. Jalguba, Gov. Olonez, Russia. Loewinson- Lessing. Loewinson-Lessing, T. M. P. M., YI, p. 294, 1885. Diabase-aphanite. Sejovica, Sofia, Bulgaria. L. Dimitrov. L. Dimitrov, Ds. Wien. Ak., LX, p. 514, 1893. Epidiabase. Assa, Caucasus. Loewinson- Lessing and Krikmeyer. Loewinson-Lessing, cf. N. J., 1899, II, p. 234. Diabase. Kolotanis, Caucasus. Makerow. Loewinson-Lessing, cf. N. J., 1899, II, p. 234. Diabase. Maschur Spring, Firuskuh, Persia. C. v. John. C. v. John, Jb. Wien. G. R-A., XXXIY, p. 121, 1884. Diabase. Remarks. Much altered. Pressed zone. Not fresh. Not fresh. Not fresh. Not fresh. Not fresh. Also in Sb. Pr.G. L-A. X, p. 293, 1892. Not fresh. Not fresh. Not fresh. Not fresh. AL,O s high. Not fresh. Not fresh. Not fresh. A1 2 0 3 high. Ca*0 low? 444 CHEMICAL ANALYSES OF IGNEOUS ROCKS. DIABASE—-Continued. No. Si0 2 A1A Fe,G 3 FeO MgO CaO Na 2 0 K 2 0 11,0+ 1LO co 2 Ti0 2 MnO Sum Sp. gr. 79 1 47. 51 16.00 16. 26 n. d. 7. 88 7.63 2.29 1.01 3. 25 101.33 C4. V 1 80 43. 44 16. 49 4.54 9.02 4. 02 10. 50 3.68 3. 56 3.06 0. 87 0.16 99. 34 ' B2. Ill 1 81 1 53.02 16. 53 1.92 7. 51 2. 63 0. 51 4.45 2. 40 1.81 0.59 0. 29 99. 95 A3.- Ill 1 82 1 49.78 14.49 0. 81 7.46 9. 53 13.44 1.71 0. 68 1.43 0. 05 99. 38 B3. IV j 83 i 48. 55 14. 88 n. d. 10. 73 11. 69 12. 65 1.42 0. 29 0. 46 0.11 100. 28 A4. IV 1 • 64 i 50. 22 19.41 8.15 n. d. 7.14 10. 20 3.84 1.20 1.10 101.26 C4. V 1 85 1 49. 35 27. 09 6. 22 5.49 2. 45 3. 65 1.02 1.34 2. 88 0.22 99. 72 D3. V J 86 1 47. 25 17.84 5. 46 7. 20 5.97 5.15 2.30 0. 29 8. 55 0.14 100.15 2. 823 A3. Ill I 87 1 56.63 11.24 12. 66 5.20 3.15 6.38 3. 97 1.24 2. 08 102.55 D3. V 1 88 53. 04 12. 45 9.60 3. 35 6. 07 10. 23 5. 36 0.25 2. 27 102. 62 1)3. V I 89 1 52.44 12.16 13. 79 n. d. 7.40 10. 46 1.90 0. 49 1.89 100.53 A4. IV 1 90 49.50 18. 40 13.10 n. d. 5. 25 2.24 4. 65 1.48 5. 23 99. 65 D4. V j 91 1 46. 60 16. 90 11.60 n. d. 9.35 2. 76 4. 67 0. 63 7.12 99. 74 1)4. V 1 MELAPHYRE. 1 1 49. 24 14. 79 1.36 8. 00 6. 89 10. 74 2. 76 0. 88 2.97 0. 20 0. 90 0. 96 0. 17 0.18 100. 08 Al. jJ 2 A4. IV 3 |J 50.17 18. 03 12. 96 n. d. 6.12 8. 86 3. 00 0. 81 1.02 100.97 1 49.58 19.16 14. 61 n. d. 3. 94 9.10 1 . 08 *2. 87 • 100.34 2. 981 D4. V j 4 11 45. 75 13. 40 8.21 6. 35 7. 29 12. 05 1.33 1. 75 2. 95 0. 25 99. 32 B4. V P 5 1 52.49 15. 91 8.01 0. 55 5. 01 5.69 3.09 2. 66 4.46 0.01 0. 99 0. 37 100.30 2. 622 A2. II P 6 1 48. 27 17.13 1.85 4. 89 3. 06 9. 77 3. 06 2.42 1.59 6. 90 0. 99 0.19 100. 21 2. 733 A2. II J INFERIOR ANALYSES. 445 DIABASE—Continued. Inclusive. Locality. Analyst. Reference. Author’s name. Remarks. . Buhemin, Elburz Mountains, Persia. E. Drasche. E. Drasche, Vh. Wien. G. R-A., 1884, p. 196. Olivine-diabase. Dried at 120°. Matotsehin Scharr, Nova Zerabla. A. Wichmann. A. Wichmann, Z. D. G. G., XXXVIII, p. 527, 1886. Diabase. Not fresh. CaC0 3 8.29 Konyam Bay, Siberia. Lindstrom, Lindstrom, cf. N. J., 1885, I, p. 430. Diabase-aphanite. Not fresh. Hammong Oramang, Siberia? Lindstrom, Lindstrom, cf. N. J., 1885, I, p. 430. Olivine-diabase. CoO trace Dickson’s Harbor, Siberia. Lindstrom, Lindstrom, cf. N. J., 1885, I, p. 430. Olivine-diabase. Hinazuru Pass, Kai Province, Japan. B. Koto. B. Koto, Q. J. G. S., XL, p. 456, 1884. Diabase. Kuroda, Kozuke, Japan. T. Harada. T. Harada, Die Jap. Inseln, Berlin, 1890, p. 66. Schalstein. From diabase. ALO, high. Nogurizawa, Kozuke, Japan. T.Ilarada. T. Harada, Die Jap. Inseln, Berlin, 1890, p. 66. Schalstein. From diabase. Powder Tower, Colesburg, Cape Colony. Trechmann and Ambuhl. E. Cohen, , N. J. B. B., V, p. 237, 1887. Quartz-diabase. Sum high. Richmond, Cape Colony. Reincke and Reuling. E. Cohen, N. J. B. B., V 7 , p. 247, 1887. Diabase-porphyrite. Sum high. Pietermaritzburg, Natal. G. Bauzel. E. Cohen, N. J. B. B., V, p. 233, 1887. Olivine-diabase. Kimberley, Griqualand, South Africa. Not stated. L. de Launay, C. R., CXXV, p. 336, 1897. Olivine-diabase. A1 2 0 3 high. CaO low. Not fresh. Kimberley, Griqualand, South Africa. Not stated. L. de Launay, C. R., CXXY, p. 336, 1897. Olivine-diabase. AL.Oo high. CaO low. Not fresh. MELAPHYRE. BaO SrO Li 2 0 0.04 trace trace Jackson, Amador County, California. W. F. Hillebrand. II. W. Turner, 14 A. R. U. S. G. S., II, p. 473, 1894. Melaphyre tuff. SaLtinho do Pary, Sao Paulo, Brazil. Not stated. F. de P. Oliveira, cf. N. J., 1891, II, p. 304. Melaphyre. Agua Clara, Puente de Chimbo, Ecuador. J. Siemiradzki. J. Siemiradzki, N. J. B. B., IV, p. 200, 1886. Melaphyre. Holmestrand, Kristiania Fjord, Norway. G. Sarnstrom. W. C. Brbgger, Z. K., XVI, p. 27, 1890. Melaphyre. so 3 Org o.os 0.98 Sotern, Nahethal, Rh. Prussia. Barwald. Iv. A. Lossen, Jb. Pr. G., L-A., X, p. 309, 1892. Oli vine-melaph y re. Not fresh. S0 3 0.09 Near Osterbrucken, St. Wendel, Harz Mountains. Fischer. K. A. Lossen, Jb. Pr. G., L-A., X, p. 280, 1892. Melaphyre. Not fresh. 446 CHEMICAL ANALYSES OF IGNEOUS ROCKS. \ MELAPIIYRE—Continued. No.. SiO, ALA FeA FeO MgO CaO Xa 2 0 K,0 H 2 0+ H.,0- co 2 Ti0 2 PA MnO Sum Sp. gr. 7 A2. II j 46.02 18. 03 7.17 2. 78 4. 83 8.68 3.31 1.33 3.22 2. 90 0.95 0. 35 99. 57 2. 692 8 C4. V | 54.93 17. 73 13. 55 n. d. 0. 80 4. 35 4. 94 2. 89 0. 96 trace 100'. 15 9 D4. V 10 B4. V | 37. 79 18.35 11. 79 n. d. 4. 69 9.31 9. 94 1.89 1.83 5.87 0.34 trace 101. 80 | 57. 67 24 37 n. d. 3.05 8. 02 2. 93 1.12 3. 48 100. 64 11 A4. IV | 52. 61 18. 94 9.60 n. d. 3.56 9.14 2.62 0. 86 3. 27 99. 70 12 D4. V | 51. 96 20.47 9. 55 n. d. 2. 27 4.14 3. 90 2.15 5. 65 100. 08 13 A4. IV | 49.99 15.11 14. 25 n. d. 4. 71 6. 04 3. 52 1.42 4. 78 99. 77 14 D4. V J 49. 02 20. 25 9.30 n. d. 3. 32 8. 26 4.09 1.52 4.30 100.07 ' 2. 80 15 A4. IV j 50. 44 18. 25 n. d. 8. 93 7. 86 7.14 3. 25 0.64 3. 01 99. 52 BASALT. L Al. I j 47. 52 13. 91 7.06 3. 76 6. 84 5. 71 3. 06 0. 77 4. 55 1.75 3. 68 1.19 0.15 0.18 100.13 2 1.1 | 47. 20 15. 36 3. 06 8. 87 4.20 5. 05 4. 72 1.40 3.04 0.16 3.34 3. 30 0.36 0. 20 100. 26 3 D3. V j 44. 93 18. 32 8. 70 21.09 0. 47 1.41 2.12 0. 58 trace trace 2. 92 • 100. 54 i 4 D3. V J 39. 22 4. 93 18.12 5. 90 3. 61 19. 29 2.51 0. 68 0.21 1.24 3.49 99. 20 5 A4. IV | 55.68 18. 93 n. d. 8. 73 4. 86 7. 99 2.12 0. 48 0. 60 99. 39 6 A4. IV | 51. 92 19. 76 11.21 n. d. 3. 38 9.30 2.16 0. 60 1.54 99. 87 7 A4. IV j 51.66 11.22 7. 62 n. d. 13. 61 7. 72 5. 98 0.89 1.06 trace 0.12 100.13 8 C2. IV j 49. 45 17.58 3.41 3. 41 4. 05 7.20 5. 83 1.57 4. 34 2. 23 trace 99. 07 2. 738 9 A4. IV 1 | 45.51 15. 82 15. 31 n. d. 3. 98 9. 26 4. 98 2. 99 0. 48 100. 00 2. 836 INFERIOR ANALYSES. 447 MELAPHYRE—Continued. Inclusive. Locality. Analyst. Reference. Author’s name. Remarks. SO-) trace Sommerberg, Thuringer Wald. C. F. Steffen. H. Loretz, Jb. Pr. G. L-A., IX, p. 306,1889. Melaphyre. Not fresh. Tenczyner Garden, Cracow, Galicia. R. Zuber. R. Zuber, Jb. Wien G. R-A., XXXV, p. 752,1885. Melaphyre. A1 2 0 3 and Fe 2 0 3 high. FeO and MgO low. Colmo di Provaglio, Yal Sabbia, Piedmont. C. Riva. C. Riva, Rend. Inst. Lomb., XXVI, p. 435,1893. Olivine-melaphyre. Not fresh. Na 2 0 high. Koktebel, Crimea, Russia. A. Lagorio. A. Lagorio, Guide Exc. VII Cong. G. Int., XXXI, p. 13,1897. Melaphyre. Not fresh. Ivobosa, Crimea, Russia. A. Lagorio. A. Lagorio, Guide Exc. VII Cong. G. Int., XXXIII, p. 27,1897. Melaphyre. Not fresh. Ivaragatch, Crimea, Russia. A. Lagorio. A. Lagorio, Guide Exc. VII Cong. G. Int,, XXXIII, p. 27,1897. Melaphyre. Not fresh. A1 2 0 3 high. Bodrak River, Crimea, Russia. A. Lagorio. . A. Lagorio, Guide Exc. VII Cong. G. Int., XXXIII, p. 27,1897. Melaphyre. Not fresh. Mount Kastel ; Crimea, Russia. R. Prendel. R. Prendel, cf. N. J., 1887, II, p. 98. Melaphyre. A1A high. Purikan, Persia. C. v. John. C. v. John, Jb. Wien G. R-A., XXXIV, p. 133,1884. Olivine-melaphyre. BASALT. NiO BaO SrO LioO trace trace none trace South Britain, Con¬ necticut. W. F. Hillebrand. • . W. H. Hobbs, B.U. S.G.S., 168, p. 35,1900. Olivine-basalt. Not fresh. so 3 F S CuO BaO SrO trace trace trace trace trace trace Crystal Falls, Michigan. H. N. Stokes. J. M. Clements, M. U. S. G. S., XXXVI, p. 106, 1899. Meta basalt. Complete in B. U. S.G.S., 148, p. 97, 1897. Alum Hill, Boulder County, Colorado. C. I. Andrews. C. I. Andrews, Proc. Colo. Sc. Soc., V, p. 151, 1895. Basalt. FeO high. MgO and CaO low. Alum Hill, Boulder County, Colorado. • C. I. Andrews. C. I. Andrews, Proc. Colo. Sc. Soc., V, p. 150, 1895. Basalt. A1. 2 0 3 and MgO low. Fe 2 0 3 and CaO high. Mount Thielson, Oregon. F. W. Clarke. J. S. Hiller, B. U. S. G. S., 148, p. 230, 1897. Hypersthene-basalt. Not described. Pit River, Lassen Peak, California. F. W. Clarke. J. S. Hiller, B. II. S. G. S., 148, p. 200, 1897. Basalt. Hried at 110°. Cr 8 0 3 0.25 Knoxville, California. W. H. Melville. G. F. Becker, M. U. S. G. S., XIII, p. 159, 1888. Basalt. Point Bonita, Marin County, California. F. L. Ransome. F. L. Ransome, B. Hep. G. Un. Cal., I, p. 106, 1893. Basalt. Not fresh? Mary Muss Bay, Jan Mayen, Arctic Ocean. R. Scharitzer. R. Scharitzer, Jb. Wien G. R-A., XXXIV, p. 718, 1884. Basalt. 448 CHEMICAL ANALYSES OF IGNEOUS ROCKS. No. 10 D4. V 11 D4. V 12 A2. II 13 D3. V 14 D4. V 15 C3. V 16 D4. V 17 A4. IV 18 D4. V 19 D4. V 20 D4. V 21 D4. V 22 D4. V 23 D2. V 24 A4. IV 25 D3. V 26 C2. IV 27 C2. IV 28 A3. Ill BASALT—Continued. Si0 2 Al 2 < >3 Fe 2 G 3 FeO MgO CaO Na 2 0 k 2 o H,0+ T 1 HH o _ 1 _ co 2 Ti0 2 PA MnO Sum Sp. gr. J 47.95 23. 75 12. 72 n. d. 1.90 7.86 1.82 0. 35 1.91 98. 26 J 53. 03 20.09 9. 43 n. d. 2.63 6 . 05 4.52 1.27 2. 64 99. 66 1 45.24 17.08 1.84 8 . 02 5. 74 4.64 5.32 0.13 5. 66 2. 98 2. 40 0. 57 0.14 99. 76 2 . 62 j 51.10 22. 05 1.21 5.89 2. 35 11.42 2 . 22 1.02 0. 71 1.82 0.18 99. 97 1 J l 45. 95 r 7. 23 n. d. 25. 02 1. 71 5.17 5. 91 1.51 6.14 0. 39 . 1.08 0. 38 100. 49 j 43. 23 21. 37 1.69 9.53 3. 57 6 . 66 5.63 trace 4.49 2 . 61 0. 97 trace 100.08 2 . 82 | 42. 21 9. 47 n. d. 23. 40 2.16 6 . 20 5. 30 1.76 7.18 0. 35 1.57 0. 51 100.11 | 52. 59 17. 33 11.14 n. d. 2 . 62 6 . 47 4.24 2. 40 3. 27 0 . 66 100. 72 | 49. 00 21.70 13. 30 n. d. 5. 22 8 . 95 0. 63 1.95 n. d. 100. 75 j 47. 23 24. 25 11.33 n. d. 4. 85 8 . 47 1.81 1.64 n. d. 99. 58 | 44. 50 21.50 14. 90 n. d. 7. 60 8 . 96 1.36 2. 47 n. d 101.26 | 44. 27 29. 82 n. d. 5. 83 11.69 3.29 1.94 2.51 99. 35 2. 864 J 48.0 23.0 16.5 n. d. 0.8 5.0 1.0 n. d. 3.2 1.5 99.0 j 47. 54 17. 70 5.19 6 . 20 5.94 9.12 4. 01 1.43 0. 72 0.10 trace 0 . 62 98.64 2. 79 J 52. 60 14.17 11.38 n. d. 6.37 9.17 2. 90 1.06 2 . 08 0. 57 100 . 30 J 48. 93 22. 63 8.84 1.97 3. 54 7. 27 4. 32 2. 04 0.36 trace trace 0. 50 100. 40 J 53. 83 15. 85 6.87 4.09 5. 56 7. 68 3. 02 0. 72 0.84 0. 32 1.73 0 . 26 0 . 21 101. 64 2. 911 | 49. 05 14.36 4.25 6 . 35 8.38 8 . 38 3.42 2 . 26 1.57 0. 40 2.18 0. 09 0. 24 101.87 2. 945 J 46. 14 13.10 10.56 n. d. 12.55 9. 97 2.61 2.02 1.02 trace 1.07 1.46 trace 100. 50 INFERIOR ANALYSES. 449 BASALT—Continued. Inclusive. Locality. Analyst. Reference. Author’s name. Remarks. Laugervatus, Iceland. R. Breon. R. Breon, Geol. d’Islande, Paris, 1884, p. 37. Basalt glass. Sum low. A1,0 3 high. Ardtun, Mull, Scotland. G. A. J. Cole. G. A. J. Cole, Q. J. G. S., XLIV, p. 303, 1888. Tachylvte. Al,O s high. Victoria Park, Glasgow, Scotland. P. Holland. F. Rutley, Q. J- G. S., XLY, p. 631, 1889. Tachvlyte. 1 inch dike. Not fresh. Eycott Hill, Lake Dis¬ trict, England. J. Hughes. Ward, Micros. Jour., 1887, p. 246 f. Lava. Cited in J. J. H Teall, Br. Petr. 1888, p. 228. Not fresh. Dinas Head, Cornwall. J. J. Beringer. H. Fox, Tr. R. Soc. Cornw., XII, p. 71, 1896. Dolerite. Not fresh. AI,0 3 low. FeO high. FeSo 0.33 Pentire Point, Cornwall. Phillips. ' J. J. H. Teall, Brit. Petrog., London, 1888, p. 231. Lava. A1 2 0 3 high. Not fresh. Round Hole Point, Cornwall. J. J. Beringer. II. Fox, Tr. R. Soc. Cornw., XII, p. 71, 1896. Dolerite. Not fresh. A1 2 0 3 low. FeO high. The Beal, Portree, Ireland. Hodgkinson. ■ Judd and Cole, Q. J. G. S., XXXIX, p. 455, 1883. Basalt glass. Banne d’Ordenche, Mount Dore, Auvergne. E. Bonjean. E. Bonjean, C R CXXVIII, p. 1097, 1899. Basalt. A1 2 0 3 high. Puy Loup, Mount Dore, Auvergne. E. Bonjean. E. Bonjean, 0 R CXXVIII, p. 1097, 1899. Basalt. A1 2 0 3 high. Banne d’Ordenche, Mount Dore, Auvergne. E. Bonjean. E. Bonjean, C. R., CXXVIII, p. 1097, 1899. Basalt. AL0 3 high. La Croix-Morand, Mount Dore, Auvergne. A. Lagorio. A. Lagorio, T. M. P. M., VIII, p. 479, 1887. Dolerite. Alboran Island, Spain. S. Traverso. S. Traverso, Gior. Min., V, p. 203, 1894. Labradorite. so 3 Cl trace 0.07 , Senoreta, Columbretes Islands, Spain. R. Pfohl. F. Becke, T. M. P. M., XVI, p. 310, 1896. Basalt. Reichshofen, Vogesen. G. Linck. G. Linck, Mt. Com. G. L-U. Els., I, p. 52, 1888. Basalt. Kirmessplatz, Siebenge- birge, Rh. Prussia. E. Kaiser? E. Kaiser, Vh. Nh. Ver. Bonn, LIV, p. 186, 1897. Basalt. A1 2 0 3 high. Dried at 125°. x so 3 Cl 0.61 trace 0.05 Buhl, n. Cassel, Nassau. O. Fromm. O. Fromm, Z. D. G. G., XLIII, p. 72, 1891. Basalt. X so 3 Cl 0. 79 0.07 0.08 Kl. Staufenberg, n. Cassel, Nassau. O. Fromm. O. Fromm, Z. D. G. G., XLIII, p. 74, 1891. Basalt. Cr..0 3 BaO trace trace 1 Stempel, n. Marburg, Nassau. F. W. Kuester. M. Bauer, N. J., 1891, II, p. 159. Basalt. 14128—No. 14—03-29 450 CHEMICAL ANALYSE!? OF IGNEOUS ROCKS BASALT—Continued. No. SiO, Al-A FeA FeO MgO CaO Na,0 K.,0 LLO-F h 2 o- co 2 Ti0 2 PA MnO Sum Sp. gr. 29 1 53. 78 14. 22 9. 66 n. d. 7.12 7. 44 3.11 0. 89 1.73 2 . 22 100.46 A4. IV 1 30 i 52. 87 • 16. 36 10. 87 n. d. 5. 23 7. 94 3. 64 0. 96 1 . 22 99. 09 2. 793 C4. V 1 31 1 52. 21 14. 62 10. 77 3. 20 5. 02 8 . 72 1.77 0. 55 0. 09 0.19 1. 36 0. 52 99. 02 C2. IV I 32 1 49. 06 13. 66 7. 55 4. 00 8 . 45 8.90 4. 03 1.00 1.30 2. 93 0.31 101.19 C2. IV 33 D2. V I J 47. 39 11.54 12.47 7.13 6 . 24 8 . 83 3. 80 0. 73 2. 79 0.18 0.97 102.07 (102.08) 34 1 44. 64 16.14 19. 35 2. 52 0. 96 10. 78 1.65 2. 24 0. 27 0.13 0. 78 0 . 61 100. 23 2. 794 D2. V I 35 | * l 43. 65 33 23 n. d. 2. 03 8 . 70 5. 43 6 . 48 0 . 61 100.13 D4. V 36 Cl. IV 1 i j- 41.71 15. 80 5. 59 7.64 4. 85 10. 30 6 . 08 1.00 2 . 22 2 . 01 2. 77 trace 0.16 101.45 2. 900 21 ° 37 ■ 40. 52 18. 97 10. 77 2. 99 6 . 72 11.34 3. 40 0. 42 2. 40 0 . 81 0.26 0. 74 100.11 2. 958 C2. IV 38 • 40. 02 19. 88 11.68 1.61 4. 03 12. 52 2. 93 0. 57 3. 49 1.31 0. 24 0 . 82 99. 80 2. 884 C2. IV 39 47. 55 14.82 n. d. 11.63 5.90 9.16 3. 87 4. 39 2 . 68 100 . 00 C4. V r 40 • 47.14 15. 67 n. d. 11.17 3. 60 11.85 2. 90 2 . 20 4.00 100 . 00 C4. V - 41 • 46.57 16.10 n. d. 12 . 02 4.14 .13. 67 2.14 0. 84 3.-80 99. 28 C4. V 42 • 44. 49 13. 35 n. d. 13. 75 5. 59 12. 90 1.39 2 . 00 3.25 2. 48 0.45 100 . 01 A4. IV 43 46. 93 24.19 5. 89 4. 42 2.42 8 . 54 2. 47 4.56 0 . 88 0 . 61 100. 91 D3. V 44 1 44.60 21. 29 10.51 0. 57 3.51 11. 35 4. 81 0. 74 2.65 100. 03 C3. V 1 45 ■ 49. 70 9.40 13. 70 2.80 9. 47 10. 25 2. 85 0.18 1. 65 0. 34 100. 34 C3. V 46 49. 65 9. 38 15. 72 0.85 9. 40 10. 25 2. 78 0.18 1.50 0. 32 100. 03 C3. V J INFERIOR ANALYSES. 451 BASALT—Continued. Inclusive. Locality. Analyst. Reference. Author’s name. Remarks. Schiffenberg, Giessen, Hesse. A. Streng. A. Streng, Ber. Oberhes. Ges , XXIX, p. 99, 1893. Anamesite. Schwartzenfels, Rhongebirge, Rh. Prussia. A. Lagorio. A. Lagorio, T. M. P. M., VIII, p. 479, 1887. • Basalt glass. Frauenberg, n. Breit- first, Hesse. R. Wedel. R. Wedel, Jb. Pr. G. L-A., XI, p. 21*, 1892. Basalt. Londorf, Vogelsberg, Hesse. A. Streng. A. Streng, N. J., 1888, II, p. 211. Dolerite. Not fresh. Dried at 100°. Michelnau, Vogelsberg, Hesse. J. M. Ledroit. J. M. Ledroit, Ber. Oberhes. Ges., XXIV, p. 151, 1886. Basalt. so 3 Cl 0.16 trace Dolmesberg, Hesse. F. W. Schmidt. C. Chelius, Erl. G. Kte., Hesse, Bl. Messel, p. 33, 1886. Basalt. Fe.,0 3 high. MgO low. Bobenhausen, Vogels- berg, Hesse. A. Lagorio. A. Lagorio, T. M. P. M., VIII, p. 493, 1887. Tachylyte. X so 3 Cl Li 2 0 0.74 0.12 0.46 trace Dachberg, Rhongebirge. P. Jannasch. F. Rinne, Jb. Pr. G. L-A., VII, p. 9, 1887. Basalt. Not fresh. so 3 Cl 0.62 0.15 Kleinostheim, Hesse. Not stated. . G. Klemm, Erl. G. Kte. Hesse. Bl. Schafheim, p. 33, 1894. Basalt. A1 2 0 3 high? Iron oxides. S0 3 for S? so 3 Cl 0.61 0.09 Otzberg, Hesse. Not stated. G. Klemm, Erl. G. Kte. Hesse, Bl. Schafheim, p. 33, 1894. Basalt. A1 2 0 3 high? Iron oxides. S0 3 for S? Schelingen, Kaiserstuhl, Baden. A. Knop. A. Knop, D. Kaiserstuhl, Leipzig, 1892, p. 277. Basalt. Calc, to 100 after deducting 2.19 H 2 0 and 5.00 CaC0 3 . Sponeck, Kaiserstuhl, Baden. A. Knop. A. Knop, D. Kaiserstuhl, Leipzig, 1892, p. 277. Basalt. Not fresh. Calc, to 100 af¬ ter deducting 4.25 H 2 0. • Sponeck, Kaiserstuhl, Baden. A. Knop. A. Knop, D. Kaiserstuhl, Leipzig, 1892, p. 278. Anamesite. Not fresh. 3.27 II 2 0. Ig¬ nited before analysis. Schonberg, Kaiserstuhl, Baden. ■ A. Knop. A. Knop, D. Kaiserstuhl, Leipzig, 1892, p. 308. (Basalt?) Tuff. Rongstock, Bohemia. Student of P. Jannasch. II. O. Lang, T. M. P. M., XV, 191, 1890. Dolerite. (Essexite.) ALO. high. MgO low. cf. No. 13 es- sexose. Burberg, Duppauer Mountains, Bohemia. J. M. Clements. J. M. Clements, Jb. Wien. G. R-A., XL, p. 345, 1890. Basalt. A1 2 0 3 high? Fe 2 0 3 high. FeO low. Brentonico, Rovereto, Tyrol. P. Giacomelli. P. Giacomelli, Soc. Alp. Trident, XIX, p. 406, 1894-5. Basalt. Not fresh. H 2 0=7.56. Ignited before analysis. Botte, Rovereto, Tyrol. P. Giacomelli. P. Giacomelli, Soc. Alp. Trident, .XIX, p. 406, 1894-5. Basalt tuff. Not fresh. Ignit=6.17. Ignited before analysis. 452 CHEMICAL ANALYSES OF IGNEOUS KOCKS. BASALT—Continued. No. SiO, A1A FeA FeO MgO CaO Na,0 K,0 h 2 o+ h 2 <5- C0 2 Ti0 2 PA MnO Sum Sp. gr. 47 l 49. 42 13.01 13.34 0. 96 6 . 30 10. 84 3. 48 1.05 0.04 1.25 0 . 21 99. 90 2. 34 C3. V f 20 ° 48 1 48. 52 12. 90 14.19 2 . 82 8 . 23 7. 54 3.19 none 1.71 0.21 99.31 2. 30 C3. V I 20 ° 49 l 48. 52 12 . 80 15.39 1.52 8 . 33 7. 84 3. 29 none 1.29 0 . 21 99.19 2.12 D3. V 1 20 ° 50 43. 70 23. 44 3.14 5. 27 3. 54 13. 05 4. 86 n. d. 2. 40 2. 92 102.32 D4. V 1 51 1 49.10 13.64 17.21 n. d. 5.30 8 . 20 4.10 1. 32 0. 70 trace 1.60 101.17 2. 96 C4. V 1 16° 52 i 46. 60 12. 50 16. 92 n. d. 6.29 9. 74 3. 39 1.15 1.65 1.05 99. 29 B4. V 1 53 1 44.2 20.9 12.2 n. d. 2.5 6.6 6.1 4. 6 n.d. 97.1 D4. V J 54 I 50.34 16. 72 15.12 n. d. 3. 96 8.00 3. 78 1.83 0. 72 100. 47 A4. IV 1 55 l 55. 82 31 .'29 n. d. 0. 44 3.91 4.60 4. 26 0. 58 100. 90 D4. V J 56 1 51.00 15. 80 10. 96 n. d. 4. 70 11.17 2. 54 1.15 0. 30 0. 13 0. 93 0.56 99. 24 C4. V 1 57 1 50. 55 16. 58 8.18 n. d. 6.10 11.45 3.15 3. 16 0 . 06 0. 67 99. 90 A4. IV 1 -* 58 1 50.15 12 . 08 9. 07 6 . 53 3. 88 10. 52 3. 08 2. 77 0. 24 0. 67 0 . 82 100.51 A2. II J 59 \ 51.31 12. 54 4. 87 7.42 2.90 10.01 3. 23 1. 36 5.63 0. 32 0. 52 trace 100.17 2.656 A2. II 1 17° 60 i 35. 48 8.30 12. 30 14.60 7.10 1.04 3.92 trace 16. '80 none 99. 54 A3. Ill 1 61 1 53.42 15. 08 17.13 n. d. 2.24 8 . 72 3. 25 trace 2.34 0. 85 trace 100. 69 A4. IV 1 62 i 49. 95 14. 77 7.41 3.53 4. 28 10 . 26 2. 87 2. 63 3. 40 trace 99.10 1 B3. IV J 63 1 48. 25 19. 23 10. 87 n. d. 5.17 7.91 3. 86 1.67 3.16 100.12 B4. V 1 64 | 47.00 16. 60 11.00 n. d. 9. 80 11.38 3. 00 0. 46 1.89 101.13 €4. V J 65 ] 46.20 13. 40 4.00 8.56 10.92 12.24 2 82 0. 48 0.18 2.18 0. 53 0 . 28 101.79 D2. V J INFERIOR ANALYSES. 453 BASALT—Continued. Inclusive. Locality. Analyst. Reference. Author’s name. Remarks. Sano, Rovereto, Tvrol. P. Giacomelli. P. Giacomelli, Soc. Alp. Trident., XIX, p. 408, 1894-5. Basalt (altered). Not fresh. Ignit=6.24. Ignited before analysis. Foianeghe, Rovereto, Tyrol. 1\ Giacomelli. P. Giacomelli, Soc. Alp. Trident., XIX, p. 408, 1894-5. Basalt tuff. Not fresh. Ignit=6.75. Ignited before analysis. Nomesino, Rovereto, Tyrol. P. Giacomelli. P. Giacomelli, Soc. Alp. Trident., XIX, p. 410, 1894-5. Basalt. Not fresh. Ignit=7.74. Ignited before analysis. Fee Gletscher Alp, Pennine Alps, Switzerland. A. A. Longsden. T. G. Bonney, Q. J. G. S., XLIX, p. 97, 1893. Basalt altered. Not fresh. A1A high. MgO low. Calc, from sol,, and insol. Mosc’ al Bo, Euganean Hills, Italy. Not stated. G. dal Piaz, Riv. Min. Crist, XVI, p. 65, 1896. Basalt. Castelnuovo, Euganean Hills, Italy. Not stated. G. dal Piaz, Riv. Min. Crist, XVI, p. 69, 1896. Basalt. Scajara, n. Battaglia, Euganean Hills. S. Bertolio. S. Bertolio, B. Soc. G., Fr. (3), XXI, p. 433, 1894. Basalt. Gala Rossa, Island of Capraia, Italy. A. Rbhrig. H. Emmons, Q. J. G. S., XLIX, p. 143, 1893. Basalt. Scoria. Eruption of 1888-9, Volcano, Lipari Islands. O. Silvestri. G. Mercall', Gior. Min., Ill, p. 108, 1892. Dolerite. Bomb. Notaro, Filicudi, .Eolian Islands. F. Glaser. A. Bergeat, Abh. Munch. Akad., XX, p. 207, 1899. Basalt. Sciarra, Stromboli, AEolian Islands. F. Glaser. A. ergeat, N. J., 1897, II, p. 113. Basalt. S0 3 0.64 Cl 0.06 Eruption of 1891, Stromboli, Lipari Islands. L. Ricciardi. Ricco and Mercalli, cf. N. J., 1893, I, p 492 Basalt ashes. CruO.-j 0.06 Eruption Nov. 16, 1884, Mt. Etna, Sicily. L. Ricciardi. L. Ricciardi, Att. Acad. Gioen., XVIII, p. (4), 1884. Basalt ashes. Franz Joseph Land, Arctic Ocean. J. J. H. Teall. J J. H. Teall, Geol. Mag., XXXIV, p. 554, 1897. Palagonite. Rovno, Wolhynia, Russia. Blumel. St. Pfaffius, cf. N. J., 1888, II, p. 78. Basalt. Contains metallic iron. Jalguba, Olonez, Russia. L. Lessing. L. Lessing, T. M. P. M., VI, p. 294, 1885. Variolite. Cap Marsa, Menerville, Algeria. Not stated. Duparc, Pearce and Ritter, Mem. Soc. Ph. Gen., XXXIII, No. 2, p. 94,1900. Basalt. A1A high. Kimberley, Griqualand, South Africa. Not stated. L. de Launay, C. R., CXXV, p! 336, 1897. Basalt. Punta Delgada, C. v. John. C. v. John, Anamesite. San Miguel, Azores. Jb. Wien. G. R-A., XLYI, p. 289, 1896. 454 CHEMICAL ANALYSES OF IGNEOUS ROCKS No. 66 D3. V 67 C2. IV 68 B4. V 69 D3. V 70 D3. V 71 D3. V 72 D4. V 73 D4. V 74 B3. V 75 B3. IV 76 C2. IV 77 Cl. Ill 78 Cl. Ill 79 Cl. Ill 80 Cl. Ill 81 Cl. HI 82 C2. IV BASALT—Continued. Si0 2 ai 2 o 8 FeA FeO MgO CaO Na,0 K 2 0 h 2 o+ h 2 o— CO, Ti0 2 48. 09 19. 05 3.44 5.59 3. 50 9. 42 5. 06 2 . 88 0. 67 1 4. 38 | , 53. 75 11.20 12 . 26 0. 69 9.11 5. 72 0. 76 0.87 4.91 0.36 50. 53 18. 36 11.76 n. d. 4. 40 9.33 2.07 3. 23 1.35 48.24 20.64 4. 63 5. 55 5.02 7.94 5. 08 1.88 0 . 02 47. 74 20. 95 3. 29 6 . 32 5.16 7. 56 7.12 1.21 0. 04 47. 50 19.32 4. 75 5. 20 4. 36 8.37 7.63 2.31 0. 46 50. 00 22 . 80 14.15 4.05 1.93 3.17 1.99 0. 33 0. 42 48. 60 25. 45 17. 55 1.20 0. 98 2 . 20 1.38 1.87 trace 45. 30 14.90 10. 87 8.20 3. 78 6.58 5. 23 1.77 1.20 trace 51.77 15. 66 8 . 46 6 . 54 4. 95 9.56 2.17 0. 96 n. d. 47.44 16. 51 15. 33 3.19 8 . 80 6 . 02 1.60 0.30 47. 33 17.96 12.64 0. 51 3. 97 6 . 29 3. 67 1 . 10 4.84 40.11 12. 40 14.64 trace 11. 65 12. 24 2. 72 0. 96 4.15 37.82 13.16 14.11 0.14 11. 75 13. 39 1 . 66 1.49 5. 56 36. 85 11.97 13. 90 6 . 54 10. 73 9. 00 4.13 0. 79 4.05 35. 86 12.10 7.82 8 . 09 9. 72 12 . 08 6 . 23 1.93 2. 90 34.81 33.18 23.03 2.34 0.39 trace trace trace 4. 89 PA 0.97 0.13 0 . 21 trace trace 0.25 0 . 61 1.05 0.57 0 . 82 1.25 1.08 0.39 MnO Sum Sp.gr.' 102 . 08 0.16 100.19 2. 867 101. 03 99. 97 2. 733 99. 52 2. 736 100.11 2. 704 0. 97 99. 81 2. 77 trace 99. 23 2 . 80 0.91 98. 99 2. 79 0 . 82 100. 89 0.37 100. 48 0.64 100. 29 0. 25 99. 97 0.24 100. 41 1.13 100 . 62 0.39 100 . 12 0 . 28 99. 99 INFERIOR ANALYSES. 455 BASALT—Continued. Inclusive. Locality. Analyst. Reference. Author’s name. Remarks. Inaccessible Island. Tristan d’Acunha, Atlantic Ocean. C. K lenient. A. Renard, Challenger Rep., Petr. Oc. Islds., 1889, p. 88. Taehvlyte. Jenissei River, Siberia. J. P. Tolmat- schow. J. P. Tolmatschow, cf. N. J., 1900, I, p. 388. Variolite. Buhemin, Elburz Mountains, Persia. E. Drasche. E. Drasche, Vh. Wien. G. R-A., XVIII, p. 196, 1884. Basalt. Well Digging, Ivula, Asia Minor. A. Rohrig. 1 H. S. Washington, A. J. S., XLVII, p. 122, 1894. Also In. Diss., Leipzig, 1894. Kulaite. Alkalies incor¬ rect. Cf. No. 15 essexose. Hermos River, Kula, Asia Minor. A. Rohrig. H. S. Washington, A. J. S., XLVII, p. 122, 1894. Also In. Diss., Leipzig, 1894. Leucite-kulaite. Alkalies incor¬ rect. Cf. No. 14 essexose. Kula Devit, Kula, Asia Minor. A. Rohrig. H. S. Washington, A. J. S., XLVII, p. 122, 1894. Also In. Diss., Leipzig, 1894. Kulaite. Alkalies incor¬ rect. Kilauea, Hawaii, Hawaiian Islands. O. Silvestri. O. Silvestri, B. Com. G. Ital., XIX, p. 171, 1888. Basaltoid. AL0 3 high. Kilauea, Hawaii, Hawaiian Islands. O. Silvestri. O. Silvestri, B. Com. G. Ital., XIX, p. 169, 1888. Basaltoid. A1A high. Kilauea, Hawaii, Hawaiian Islands. O. Silvestri. O. Silvestri, B. Com. G. Ital., XIX, p. 180, 1888. Basaltoid. Kilauea, Hawaii, Hawaiian Islands. A. H. Phillips. A. H. Phillips, A J S XLVII,’ p. 473, 1894. Basalt. Stalagmite. SO., CuO 0.06 0.08 Salt Lake, Oahu, Hawaiian Islands. A. B. Lyons. A. B. Lyons, A. J. S., II, p. 427, 1896. Basalt tuff. Not fresh. H. 2 0+=5. 04. H 2 0—=9. 08. Ignited before analysis. so 3 s CuO 0.07 0.07 0.15 Mount Ivohala, Waimea, Hawaiian Islands. A. B. Lyons. A. B. Lyons, A. J. S., II, p. 424, 1896. Basalt. Not fresh. H 2 0+=3. 08. H 2 0—=2.38. Ignited before ■analysis. so 3 • CuO 0.17 0.11 Diamond Head, Oahu, Hawaiian Islands. A. B. Lyons. A. B. Lyons, A. J. S., II, p. 427, 1896. Basalt tuff. Not fresh. H.,0-|-=6.48. H 2 0—=5. 46. Ignited before analysis. so 3 FeSo CuO” 0.15 0.05 0.07 Punch Bowl, Oahu, Hawaiian Islands. A. B. Lyons. A. B. Lyons, A. J. S., II, p. 427, 1896. Basalt tuff. Not fresh. H 2 0+=8.24. H 2 0—=9.98. Ignited befor* analysis. so 3 s CoO CuO trace 0.14 0.04 0.10 Panahou, Oahu, Hawaiian Islands. A. B. Lyons. A. B. Lyons, A. J. S., II, p. 424, 1896. Basalt, scoria. Not fresh. H 2 0+=4.74. H 2 0—=5.48. Ignited befort analysis. so. FeS. CuO' 0.27 1.40 0.25 Panahou, Oahu, Hawaiian Islands. A. B. Lyons. A. B. Lyons, A. J. S., II, p. 424, 1896. Basalt, lapilli. Not fresh. H 2 0 not given. Ignited before analysis. S0 3 CuO 0.31 0.37 Honolulu, Oahu, Hawaiian Islands. A. B. Lyons. A. B. Lyons. A. ,T. S., II, p. 427, 1896. Basalt. Not fresh. H„0+=11.63. H 2 0 —=6.43. Ignited before analysis. 456 CHEMICAL ANALYSES OF IGNEOUS HOCKS BASALT—Continued. No. Si0 2 A1A Fe.,0, FeO MgO CaO Na 2 0 K 2 0 H s O-f H 2 0— o o tc , Ti0 2 p 2 o 5 MnO Sum Sp. gr. 83 1 24.62 23. 89 37. 85 2 . 08 0. 99 trace 1.41 trace 8.12 0. 24 0. 25 100.12 C2. IV 1 84 4.54 41. 35 40. 87 2.52 0.37 trace trace trace 8 . 99 0. 63 0 . 08 100.16 C2. IV 1 85 1 46. 76 17. 71 1. 73 10. 92 10. 37 11.56 1.83 0.17 n.d. 0.44 101.49 D3. V J 86 1 44.73 16. 28 14. 57 n. d. 2. 23 1.88 4. 50 4. 02 9. 56 2. 89 100. 64 C4. V J 87 45.13 18.13 12. 94 n. d. 7. 33 11.23 2.14 0. 98 2.18 100 . 06 A4. IV 1 NEPHELITE-PLAGIOCLASE ROCKS. 1 48. 90 14.70 4.14 3. 68 3. 95 8.26 5. 22 0. 56 2.44 0. 52 5.42 0. 95 0. 79 0. 03 100.04 At. I 1 2 1 46.45 15.49 4. 86 6 . 83 3.47 9.38 3. 23 0. 57 3. 80 4. 90 0. 85 99. 83 A3. Ill 3 1 43. 40 13. 60 6 . 66 6 . 83 8.15 9. 05 1 . 66 0.64 3. 20 7.10 0 . 26 100. 55 A3. Ill I 4 1 42.15 18. 75 4. 94 7.30 3. 74 9. 75 3.34 2. 07 4. 35 3.10 0. 58 100.07 A3. Ill 1 5 1 39.20 15. 52 8 . 80 5. 08 6 . 49 14. 45 2.04 1.11 3. 70 2 . 80 1.18 100.37 A3. Ill 1 6 | 38.85 15. 65 10. 43 8 . 88 1.49 11.35 1.96 0 . 62 4.50 6 . 25 0 . 62 100 . 60 A3. Ill 7 1 42. 08 20. 03 7. 61 n. d. 3.52 10 . 62 (4- 50) 4. 54 5. 51 1.59 100.00 D4. V J 8 1 \ 38. 35 9.18 20. 32 n.d. 13. 78 11. 76 2. 77 2 . 02 1.20 99. 38 3. 22 B4. V J 9 1 48.61 20. 74 4.29 0 . 22 2.11 0. 25 0.16 0.77 7. 07 12.10 3. 57 0. 29 none 100.81 Al.I J 10 1 35. 03 9. 80 5.55 4. 98 9. 78 15. 09 2.04 2.16 2.05 0. 41 7.83 2 . 20 1.99 0 . 06 99. 66 2. 99 Al.I 1 • 23° 11 1 48.05 18. 65 2. 90 4. 70 2.28 7. 50 6.19 5.16 n. d. n. d. 2 . 60 0 . 28 98. 31 2. 665 D3. V ] 12 42. 20 10. 32 n. d. 11. 85 14. 82 12. 96 3.44 0.64 2. 92 100 . 00 C4. V 1 1 INFERIOR ANALYSES. 457 BASALT—Continued. Inclusive. Locality. Analyst. Reference. Author’s name. Remarks. so., 0 .40 CuO 0.27 Hilo, Hawaii, Hawaiian Islands. A. B. Lyons. A. B. Lyons, A. J. S., II, p. 427, 1896. Basalt. Not fresh. H 2 O+=12.70. H,jO—=8.49. Ignited before analysis. SO., 0.55 CuO 0.26 1 Kaneohe, Oahu, Hawaiian Islands. A. B. Lyons. A. B. Lyons, A. J. S., II, p. 427, 1896. Basalt. W eathered. H 2 0+=20.48. H 2 0—=3.55. Ignited before analysis. Lat. 13° 28' S (sic), Long. 149° 30' W., S. Pacific Ocean. A. F. Renard. Murray and Renard, cf. N. J., 1893. II, p. 308. Basalt glass. Latitude? Lat. 18° 28' S (sic), Long. 149° 30' W., S. Pacific Ocean. A. F. Renard. Murray and Renard, cf. N. J., 1893. II, p. 308. Palagonite. Latitude? Cape Adare, Antartic Continent. J. A. Schofield. David, Snieeth and Schofield, J. R. Soc. N. S. W., XXIX, p. 477, 1895. Basalt. NEPHELITE-PLAGIOCLASE ROCKS. 1 so* BaO SrO Li. 0.04 0. 31 0.13 trace Shield’s River, Crazy Mountains, Montana. H. N. Stokes. W. H. Weed, B. U. S. G. S., 148, p. 146, 1897. Theralite. Not fresh. Hotzendorf, Moravia. C. F. Eichleiter. C. F. Eichleiter, Vh. Wien, G. R-A., XXX, p. 72, 1896. 1 Teschenite. Not fresh. Lohtka, Frankstadt, Moravia. C. F. Eichleiter. C. F. Eichleiter, Vh. Wien, G. R-A., XXX, p. 73, 1896. Teschenite. Not fresh. Blauendorf, Neutitsch- ein, Moravia. C. F. Eichleiter. C. F. Eichleiter, Vh. Wien, G. R-A., XXX, p. 71, 1896. Teschenite. Not fresh. Jasenitz, Moravia. C. F. Eichleiter. C. F. Eichleiter, Vh. Wien, G. R-A., XXX, p. 74, 1896. Teschenite. Not fresh. Neutitschein, Moravia. C. F. Eichleiter. C. F. Eichleiter, Vh. Wien, G. R-A., XXX, p. 72, 1896. Teschenite. Not fresh. Sohla, Silesia. C. E. M. Rohr- bach. C. E. M. Rohrbach, T. M. P. M., VII, p. 49, 1886. Teschenite. Not fresh. A1A, high, Alkalies by dif¬ ference. Pilot Knob, Austin, Texas. J. F. Kemp. J. F. Kemp, Am. G., VI, p. 293, 1890. Nephelite-basalt. F Cr,0 3 BaO SrO 0.63 trace none none Anna Lee Mine, Cripple Creek, Colorado. W. F. Hillebrand. W. Cross, B. U. S. G. S., 148, p. 162, 1897. Nephelite-basalt. “Altered.” Not described. ZrO.. S0 3 Cl FeS., BaO' SrO none none trace 0.38 0.14 0.17 Appie Ellen Shaft, Crip¬ ple Creek, Colorado. W. F. Hillebrand. W. Cross, 16 A. R. U. S. G. S., II, p. 50, 1890. Nephelite-basalt. “Altered.” Picota, Serra de Mon- chique, Portugal. G. Pajkull. Kraatz-KoschlauandHackmann, T. M. P. M., XVI. p. 275, 1896. Nephelite-tephrite. Low sum due to H 2 0 and C0 2 ? Liitzelberg, Kaiser- stuhl, Baden. A. Knop. A. Knop, D. Kaiserstuhl, Leipzig, 1892, p. 274. Basanite. Not fresh. Calc, to 100, af¬ ter deducting 3.00 1I 2 0. 458 CHEMICAL ANALYSES OF IGNEOUS ROCKS. NEPH ELITE-PLAGIOCLASE ROCKS—Continued. 1 J) No. Si0 2 A1A Fe 2 0 :) FeO MgO CaO Na,0 K 2 0 H,0+ H.,0— CO, TiO, PA MnO Sum Sp. gr. 13 1 41.76 12. 61 8.39 7.38 5. 23 13. 62 2. 58 1.19 3. 66 4.49 100.31 A3. Ill J 14 1 44.10 12.80 5. 43 5. 73 10. 66 10. 57 2.84 1.24 3. 90 0. 36 2.46 0. 55 0.18 101. 79 2. 956 Dl. IV j 15 1 42. 68 15. 02 7.95 6. 09 4. 99 9. 77 4. 97 1.42 3. 61 0. 46 2. 48 0. 21 101.95 2. 925 D2. V 1 16 1 44.20 17. 03 5. 30 5. 70 7.20 9.10 5. 90 2. 95 3. 83 101.21 ■ C3. V 1 17 D‘2. V 18 J 42.71 17. 05 0. 92 7. 66 5. 49 12. 31 10.48 2. 81 0. 60 0.60 0. 96 101. 59 3. 095 | 52. 55 14. 63 10. 70 n. d. 1.71 6. 37 3. 83 3. 48 6. 72 0. 63 100.62 A4. IV 19 1 45. 28 12. 95 9. 83 4. 73 3. 82 10.91 3. 34 2. 03 1.88 0. 69 0.16 1.60 0. 70 0. 91 98. 83 2. 785 D‘2. V J 20 1 38.39 17.38 6. 49 6. 83 7.12 13.14 4. 79 2. 33 1.01 0. 21 0.19 1.74 1.41 101.03 3. 05 C2. IV 21 B3. IV 1 j 40.99 16. 50 10. 62 n. d. 3. 29 12. 63 5. 95 2. 36 2. 63 2. 41 0. 89 0.35 99. 62 .08 2. 91 99. 54 MONCHIQUITE, ETC. 1 C3. V 1 | 45. 58 15.87 4. 65 6. 37 8. 32 9. 91 3. 42 1.61 3.14 trace 98. 87 2 D3. V j 45.13 18. 06 11.88 0. 32 1.12 10.17 3. 57 6. 06 3.04 * 0.39 99. 74 3 D3. V | 40. 37 17. 86 14. 45 0. 38 1.63 17. 61 1.29 0. 83 4. 47 99. 39 4 A2. II |42.57 15. 90 2.10 6. 85 3.18 10.55 4. 71 3. 88 2. 00 4. 87 2. 50 trace 0. 79 99. 90 5 Bl. V | 41. 37 16. 25 16. 93 n. d. 4. 57 12. 35 4.18 3. 98 0. 45 100. 08 6 B4. V | 40. 47 11.86 17.44 nTd. 3.10 16. 80 1.90 4. 21 3. 60 99. 38 3.102 7 D4. V j 31. 80 18. 78 15. 20 n. d. 3.32 14. 60 1.10 5.07 8.10 0.95 98. 92 2. 939 8 Cl. V i 38. 07 17.92 14. 08 n. d. 8. 87 11. 70 0. 96 2. 23 5. 50 • 99. 33 9 C3. V | 46. 98 17. 07 1.85 7.02 8.29 12.15 2. 54 0. 53 4. 86 0.09 101.38 3.20 INFERIOR ANALYSES. 459 NEPHELITE-PL AG IOCL AS E ROCKS—Continued. Inclusive. Locality. Analyst. • Reference. Author’s name. Remarks. Ilamberg, Neckarelz, Baden. E. E. Dana. F. Schalch, G. Sp. K. Bad., Bl. Mosbach, p. 32, 1894. Neph elite-basalt. Not fresh. X 0.71 S0 3 0.09 Cl 0.17 Linsberg, Rhengebirge. E. Moller. E. Moller, N. J., 1888, I, p. 105. Nephelite-basanite. X 2.30 Cl trace Linsberg, Rhongebirge. E. Moller. E. Moller, N. J., 1888, I, p. 102. Nephelite-basanite. \ Steinerberg, Schorbach, Hesse. Keim. H. Wolff, cf. N. J., 1891 II, p. 279. Nephelite-basanite. Bubenik, Grossdehsa, Saxony. O. Beyer. O. Bever, T. M. P. M., X, p. 14, 1889. Nephelite-basalt. Na 2 0 high, cf. reference. SO :J trace Cl trace Liebwerda, Bohemia. F. Ullik. J. E. Hibsch, T. M. P. M., XV, p. 237, 1896. Tephrite tuff. Not fresh. SO3 trace Schichenberg, n. Tetschen, Bohemia. F. Hanusch. J. E. Hibsch, T. M. P. M., XIV, p. 105, 1894. Nephelite-leucite- tephrite. Alkalies low? SO3 none St. Georgsberg, Randnitz, Bohemia. J. Hoffmann. J. Hoffmann, cf. N. J., 1898, II, p. 59. Nephelite-basalt. MnO high. S0 3 0.64 Cl 0.36 1 Teufelsmuhle, Hochstraden, Styria. A. Jager. A. Sigmund, T. M. P. M., XVI, p. 347, 1897. Nephelinite. MONCHIQUITE, ETC. Shelburne Point, Bur¬ lington, Vermont. H. T. Vulte. J. F. Kemp in Weed and Pirsson, B. U. S. G. S., 139, p. 116, 1896. Monchiquite. New analysis of next No. Shelburne Point, Bur¬ lington, Vermont. W. H. Morrison. Kemp and Marsters, B. U. S. G. S., 107, p. 34, 1893. Monchiquite. A1A, FeA, and K 2 Ohigh. FeO and MgO low. Same as above. Burlington, Vermont. W. H. Morrison. Kemp and Marsters, B. U. S. G. S., 107, p. 34, 1893. Monchiquite. A1A, FeA, and CaO high. FeO, MgO and alkalies low. S trace S. Berge, A ln<">, Sweden. N. Sahlbom. N. Sahlbom, N. J., 1897, II, p. 98. Monchiquite. Not fresh. Beemerville, Sussex County, New Jersey. F. W. Love. J. F. Kemp, Tr. N. Y. Ac. Sci., XI, p. 69, 1892. Ouachitite. ALA high? Rutan’s Hill, Sussex County, New Jersey. J. F. Kemp. J. F. Kemp, A. J. S., XXXVIII, p. 133, 1889. Ouachitite. Not fresh. Beemerville, Sussex County, New Jersey. J. F. Kemp. J. F. Kemp, A. J. 8., XXXVIII, p. 133, 1889. Ouachitite. A1A high. Not fresh. Tatumville, Saline County, Arkansas. J. F. Kemp. J. F. Kemp in J. F. Williams, A. R. G. S. Ark., 1890, p. 399, 1891. Ouachitite. Angel Island, California. F. L. Ransome. F. L. Ransome, B. Dep. G. Un. Cal., I, p. 231, 1894. Fourchite. 460 CHEMICAL ANALYSES OF IGNEOUS ROCKS No. 1 D2. V 9 D4. V 3 D4. V 4 D‘2. V 5 D3. V 6 D3. V 7 D3. V 8 D3. V 9 D3. V 10 D3. V 11 D3. V 12 D3. V 13 D3. V 14 D3. V 15 D3. V 16 D3. V I I I I I I I ) ) 1 I I I ) I LEUCITE-PLAGIOCLASE ROCKS, ETC. Si0 2 A1A Fe 2 0 3 FeO MgO | CaO • Na 2 0 K 2 0 H 2 0+ H 2 0- C0 2 TiO, ?A MnO Sum Sp. gr. 52. 06 23.13 i 8.52 1.75 2. 24 3. 30 5.37 3.10 1.17 0.16 0 . 20 trace 101.00 43.49 15.43 8.52 n. d. 3. 63 8 . 36 (12. 77) 4. 49 3. 31 100.00 50.43 25.04 3.48 n. d. 4. 51 7. 49 5.17 1.08 2 . 61 99. 71 44.16 12. 96 8.07 3.10 10. 83 12 . 26 1.92 0. 72 2.41 0. 46 2.06 1.03 99. 98 2. 965 56. 32 17.07 3.11 . 6 . 03 2. 05 6 . 53 2.24 4. 03 2.04 0. 93 0.13 100. 48 2.492 56. 07 16. 31 1.64 8 . 39 3. 04 5. 94 1.22 5.27 1.17 0. 92 0.14 100. 09 2. 552 55.11 16. 07 3. 04 . 8.46 3.10 6 . 46 1.58 5. 07 0. 89 0 . 75 100. 53 2.546 55. 08 17. 52 2.11 6.17 2. 41 6.19 1.37 4. 32 4. 03 1.02 0.10 100. 32 2. 492 52. 71 14. 41 2 . 22 8 . 03 5.11 11.06 1.34 2. 55 1.01 1.47 0.12 100. 03 2 . 816 52.16 15. 03 3.17 8 . 42 4. 69 10. 07 2. 38 2. 47 0. 72 1.15 0.24 100. 50 2. 749 51.94 14. 78 2.94 . 9.13 2. 63 8.51 2.08 5. 33 • 2.12 0.62 0.17 100.25 48.51 14. 56 3.21 8.19 4.12 10. 69 2.15 4.24 2 . 80 0. 95 0.16 99. 58 2. 726 51.24 15. 26 3. 70 8 . 48 4.04 7. 63 1.08 2. 85 5.29 0. 58 0.12 100.27 50.19 16. 86 2.12 7. 32 3. 66 11.40 2.11 3. 78 1.17 1.39 0 . 21 100 . 21 2. 708 49.34 18. 99 3.11 6 . 07 3. 51 7.89 1.89 6 . 03 1.98 1.31 0 . 26 100. 38 2. 562 49. 23 15.04 1.39 9. 03 8 . 02 13. 58 1.07 1.54 0. 93 0.17 0.37 . ' 100. 37 Inclusive. INFERIOR ANALYSES. LEUCITE-PLAGIOCLASE ROCKS, ETC. 461 Locality. Analyst. Reference. Author’s name. Remarks. Cerro de las Yirgenes, Lower California, Mexico. Jiiger. K. v. Chrustchoff, T. M. P. M., VI, p. 168, 1885. Leucitophyre. Al.,0, high. MgO low. Alkalies inter¬ changed? Mean of 2 anals. Sta. Cruz, Rio de Janeiro, Brazil. Not stated. E. Hussak, N. J. 1892, II r p. 152. Leucite-tephrite. Alkalies by dif¬ ference. Clermain, n. Cluny, France. Not stated. Michel Levy and Lacroix, B. Serv. Cte. G. Fr,, VII, No. 45, p. 9, 1895. Leucotephrite. A1 2 0 8 high. Alkalies low. Dobernberg, Tetschen, Bohemia. R. Pfohl. J. E. Hibsch, T. M. P. M., XIV, p. Ill, 1894. Leucite-basanite. Alkalies low. Leucite-basalt in T. M. P. M., XV, p. 255, 1895. Montalto, n. Lake Bolsena, Italy. L. Ricciardi. C. Klein, Sb. Berl. Akad., 1888, p. 115. Leucite-basani te. Alkalies low. Also in N. J. B. B., VI, p. 28, 1889. Montalto, n. Lake Bolsena, Italy. L. Ricciardi. C. Klein, Sb. Berl. Akad., 1888, p. 115. Leucite-basanite. Alkalies low. Also in N. J. B. B., VI, p. 28, 1889. Montalto, n. Lake Bolsena, Italy. L. Ricciardi. C. Klein, Sb. Berl. Akad., 1888, p. 115. Leucite-basan i te. Alkalies low. Also in N. J. B. B., VI, p. 28, 1889. Montalto, n. Lake Bolsena, Italy. L. Ricciardi. C. Klein, Sb. Berl. Akad., 1888, p. 115. Leucite-basanite. Alkalies low. Also in N. J. B. B., VI, p. 28, 1889. Canonica, Orvieto, Italy. L. Ricciardi. C. Klein, Sb. Berl. Akad., 1888, p. 108. Leucitite. Alkalies low. Also in N. J. B. B., VI, p. 20, 1889. Monte Bisenzio, Lake Bolsena, Italy. L. Ricciardi. C. Klein, Sb. Berl. Akad., 1888, p. 106. Leucite-tephrite. Alkalies low. Also in N. J. B. B., VI, p. 19, 1889. Fosso Pantacciano, Lake Bolsena, Italy. L. Ricciardi. C. Klein, Sb. Berl. Akad., 1888, p. lli. Leucite-basanite. Alkalies low. Also in N. J. B. B., VI, p. 23, 1889. Fosso Pantacciano, Lake Bolsena, Italy. L. Ricciardi. C. Klein, Sb. Berl. Akad., 1888, p. 108. Leucitite. Alkalies low. Also in N. J. B. B„ VI, p. 20, 1889. Toscanella, n. Lake Bolsena, Italy. L. Ricciardi. C. Klein, Sb. Berl. Akad., 1888, p. 106. Leucite-tephrite. Alkalies low. Also in N. J. B. B., VI, p. 19, 1889. San Magno, W. of Lake Bolsena, Italy. L. Ricciardi. C. Klein, Sb. Berl. Akad., 1888, p. 108. Leucite-tephrite. Alkalies low. Also in N. J. B. B., VI, p. 20, 1889. Gradoli, Lake Bolsena, Italy. L. Ricciardi. C. Klein, Sb. Berl. Akad., 1888, p. 119. Leucite-tephrite tuff. Alkalies low. Also in N. J. B. B., VI, p. 32, 1889. Montefiascone, Lake Bolsena, Italy. L. Ricciardi. C. Klein, Sb. Berl. Akad. 1888, p. 111. Leucite-basan i te. Alkalies low. Also in N. J. B. B., VI, p. 23, 1889. 462 CHEMICAL ANALYSES OF IGNEOUS ROCKS LEUCITE-PLAGIOCLASE ROCKS, ETC.—Continued. No. SiO, 1 A1A Fe._,0 3 FeO MgO CaO Na,,0 K,0 h 2 o+ FLO— C’0 2 Ti0 2 P 2 0 5 MnO i | Sum Sp. gr. . 17 D3. V > 49.18 16. 07 1.17 8 . 94 5.43 13.26 1.25 2. 07 1.62 \ 0.41 0. 42 100. 30 IS D3. V | 48. 84 15. 45 2. 78 9.62 ! 5. 37 13. 29 1.24 1.83 0. 72 0 . 22 0.34 100 . 26 19 D3. V J- 47. 61 ' 17. 38 ' 2. 03 7.24 6 . 21 15. 61 0.86 1.81 0.64 0 . 61 0 . 21 100 . 21 2. 731 20 D3. V | 49. 03 16. 07 1. 76 10. 05 3. 94 12. 04 1.73 3.06 1.38 0. 27 0.44 100. 34 21 D3. V | 48. 75 16. 03 1.83 10.12 4.02 11. 72 1.89 2. 94 1.39 0.31 0. 42 100.04 22 D3. V j 48. 30 15. 07 1.53 9.18 7.48 13. 95 0.94 1.73 1. 78 0. 47 0. 29 100. 72 23 D3. V j 48.28 16. 51 3. 07 7.62 4. 03 12. 50 0 . 86 1.84 3. 51 1.71 0.16 100. 09 2. 769 24 D3. V 1 48. 09 13. 60 2 52 9. 36 6 . 75 13. 05 1.41 3. 07 1.62 0.41 0.10 99. 98 2. 762 25 D4. V j. 51.42 18. 57 n. d. 8 . 47 0. 48 2. 74 10. 38 6 , 42 0 . 88 0.14 trace 100. 23 2. 49 26 D3. V j 48. 38 19. 03 n. d. 10. 57 1.13 5. 69 4. 40 8.65 0.64 0.15 0. 33 trace 100 . 61 2. 67 27 D4. V | 47.50 28. 38 3. 68 n. d. ! 1.36 5.03 trace 4. 60 6 . 00 3. 40 trace 99. 95 2. 35 28 D4. V J- 46. 85 21.49 5. 21 n. d. 0.96 8 . 54 trace 4. 68 8.10 3. 80 trace 99. 63 2.16 29 D4. V | 46.59 27.12 5. 83 n.d. 0. 53 4. 76 trace 2.04 8.90 3. 90 ■ trace 100. 67 2 . 02 30 D4. V J- 46. 57 19. 86 n. d. 8.97 1.82 10. 38 3.13 7.48 1.29 0.44 0. 93 100. 87 2. 67 31 C3. V J 45. 93 18. 27 n. d. 9.39 [ 4.41 10. 98 3.99 6 . 28 0. 83 0. 09 0.39 0 . 06 100.62 2 . 62 32 C3. V | 45. 71 17. 90 n. d. 9.69 3. 87 10. 56 4. 85 5. 21 1.82 trace 0.34 0.54 100 . 61 2. 78 33 D4. V j 45. 02 22.57 8 . 94 2.35 10. 09 3.28 7.13 0. 91 0. 40 trace 100.69 2. 83 34 - D4 .V | 46.15 23.19 6 . 42 n. d. 2. 25 8 . 52 trace 3. 01 5. 50 4. 90 trace 99.94 2. 33 INFERIOR ANALYSES. 463 LEUCITE-PLAGIOCLASE ROCKS, ETC.—Continued. Inclusive. Locality. Analyst. Reference. Author’s name. Remarks. so 3 0.48 Montefiascone, Lake Bolsena, Italy. L. Ricciardi. C. Klein, Sb. Berl. Akad., 1888, p. 108. Leucitite. Alkalies low. Also in N. J. B. B., VI, p. 20, 1889. so 3 0.56 R. R. tunnel, Montefias¬ cone, Lake Bolsena. L. Ricciardi. C. Klein, Sb. Berl. Akad., 1888, p. 108. Leucitite. Alkalies low. Also in N. J. B. B., VI, p. 20, 1889. Montefiascone, Lake Bolsena, Italy. L. Ricciardi. C. Klein, Sb. Berl. Akad., 1888, p. 111 . Leucite-basanite. Alkalies low. Also in N. J. B. B., VI, p. 23, 1889. so 3 0.57 Sassi Lanciati, Lake Bolsena, Italy. L. Ricciardi. C. Klein, Sb. Berl. Akad., 1888, p. 108. Leucitite, Alkalies low. Also in N. J. B. B., VI, p. 20, 1889. so 3 0.62 Sassi Lanciati, Lake Bolsena, Italy. L. Ricciardi. C. Klein, Sb. Berl. Akad., 1888, p. 108. Leucitite. Alkalies low. Also in N. J. B. B., VI, p. 20, 1889. Monte Jugo, Lake Bol¬ sena, Italy. L. Ricciardi. C. Klein, Sb. Berl. Akad., 1888, p. 108. Leucitite. Alkalies low. Also in N. J. B. B., VI, p. 20, 1889. Santa Trinita, Orvieto, Italy. L. Ricciardi. C. Klein, Sb. Berl. Akad., 1888, p. 106. Leucite-tephrite. ■ Alkalies low. Also in N. J. B. B., VI, p. 19, 1889. Valentano, Lake Bolsena, Italy. L. Ricciardi. C. Klein, Sb. Berl. Akad., 1888, p. 111. Leucite-basanite. Alkalies low. Also in N. J. B. B., VI, p. 23, 1889. S03 0.73 Tavolato, Alban Hills, Italy. G. Aichino. V. Sabatini, Mem. Cta. G. Ital., X, p. 164, 1900. Leucite-tephrite (with hatiyne). A1 2 0 3 high. MgQ low. Dried at 110°. so 3 1.64 Lago di Nerni, Alban Hills, Italy. G. Aichino. V. Sabatini, Mem. Cta. G. Ital., X, p. 164, 1900. Leucite-tephrite (with haiiyne). A1.,0 3 high. MgO low. Dried at 110°. Cr 2 0 3 trace Via Ardeatina, Alban Hills, Italy. Trottarelli. A. Verri, B. Soc. G. Ital., XII, p. 72, 1893. Leucitite-tuff. A1 2 0 3 high? Cr .,03 trace Casale Caffarella, Alban Hills, Italy. Trottarelli. A. Verri, B. Soc. G. Ital., XII, p. 54, 1893. Leucitite-tuff. Cr 2 0 3 trace Alban Hills, Italy. Trottarelli. A. Verri, B. Soc. G, Ital., XII, p. 60, 1893. Leucitite-tuff. Rocca di Papa, Alban Hills, Italy. G. Aichino. V. Sabatini, Mem. Cta. G. Ital., X, p. 163, 1900. Leucitite. Not fresh. Dried at 110°. A1 2 0 3 high. MgO low. go O & trace Rocca di Papa, Alban Hills, Italy. G. Aichino. V. Sabatini, Mem. Cta. G. Ital., X, p. 163, 1900. “Sperone.” Dried at 110°. Not fresh. so* 0.12 Rocca di Papa, Alban Hills, Italy. G. Aichino. V. Sabatini, Mem. Cta. G. Ital., X, p. 163, 1900. “ Sperone.” Dried at 110°. Not fresh. Rocca di Papa, Alban Hills, Italy. G. Aichino. V. Sabatini, Mem. Cta. G. Ital., X, p. 163, 1900. Leucitite. Dried at 110°. Cr 2 0 3 trace Cava di San Paolo, Alban Hills, Italy. Trottarelli. A. Verri, B. Soc. G., Ital., V IT ™ K'-i 1 SQQ Leucitite tuff. A1A high. 464 CHEMICAL ANALYSES OF IGNEOUS ROCKS LEUCITE-PLAGIOCLASE ROCKS, ETC.—Continued. No. Si0 2 A1A Fe 2 0 3 FeO MgO CaO Na 2 0 K 2 0 H,0+ h 2 o- C0 2 Ti0 2 p 2 o 5 MnO Sum Sp. gr. 35 1 59.92 18. 09 4. 52 n. d. 0.44 2.19 6 . 23 7. 24 1.17 99. 80 B4. V 1 36 \ 47. 25 18.17 9. 23 n. d. 3. 74 8 . 65 3. 93 7.15 0. 94 trace 99. 06 2. 723 C4. V 1 3, \ 51.38 26. 35 n. d. 6 . 03 9.09 4. 76 3. 33 n. d. 100. 93 D4. Y I 38 1 47.13 14. 47 13. 56 n. d. 4.16 9. 00 0 . 81 8 . 00 2. 94 100. 07 A4. IV I 39 1 47. 31 18.51 14.56 n. d. 2 . 28 7. 57 0. 98 6.14 2. 31 0. 55 100 . 21 2. 910 B4. Y I 40 46. 43 15. 99 15.04 n. d. 1.74 9. 27 0.51 6 . 93 3. 20 0. 73 99. 84 2. 890 B4. V 1 HAUYNOPHYRE, ETC. 1 J 54. 00 24.10 8 . 95 n. d. 2. 35 4. 65 5. 60 1 1.58 n. d. 101.23 D4. V 1 ■ j 2 1 53.60 22.57 6 . 78 n. d. 3.92 5.80 5.11 4.01 n. d. 101. 79 D4. Y 1 3 1 53. 20 24.16 7. 07 n. d. 2 . 20 6 . 38 4. 44 3. 21 n. d. 100.16 D4. V 1 4 53.00 22. 63 7. 50 n. d. 2. 47 7.14 1.72 5. 89 n. d. 100.60 D4. V I 5 t 52.80 21.95 10. 96 n. d. 3. 06 7. 05 4. 37 2.39 n. d. 102. 58 D4. V J • 6 1 54. 48 21.67 1.21 2. 77 1.44 5.05 7.43 4. 65 2 . 66 0. 38 trace 102 . 02 D2. V I 7 l 47. 00 17.86 4. 85 4. 02 1.10 5. 30 6.84 4. 55 1.53 1.10 4. 80 trace 0. 32 1.25 100. 52 2. 492 B3. IV 1 ' 8 1 47. 71 9. 37 5.31 9. 53 7. 06 15.13 2 . 21 1.01 0.41 trace 0 . 81 100. 67 2. 992 D3. V I 26° 9 1 46. 72 19.50 3. 03 5. 02 4. 41 16. 28 2. 09 1.24 1.13 - 0. 73 0.37 100. 52 3. 012 D4. Y J 26° 10 1 45.37 14.11 5. 06 7.08 7.56 17.11 1.34 0 . 62 0. 65 0 . 28 0 . 26 100. 74 2. 574 D3. V 1 26° 11 1 42. 78 11.07 17.07 5. 51 4. 23 12. 57 1.11 0. 72 4. 02 0.31 0. 42 100. 33 D3. Y 1 12 42. 63 18.91 5.06 9.16 3. 60 12.11 2 . 66 1.35 2.12 0.34 0.36 100. 37 2. 538 D3. Y 1 26° 13 42.16 16. 25 3. 02 9.03 3.11 10. 05 2.13 7. 06 2.13 0.26 : 0.72 1 100.03 2. 615 D3. Y 1 j 26° INFERIOR ANALYSES. 465 LEUCITE-PLAGIOCLASE ROCKS, ETC.—Continued. Inclusive. Locality. Analyst. Reference. Author’s name. Remarks. Lava of Oct., 1822, Mt. Vesuvius, Italy. A. Lagorio. A. Lagorio, T. M. P. M., VIII, p. 475. 1887. Obsidian. Cl trace Mt. Vesuvius, Italy. A. Lagorio. A. Lagorio, T. M. P. M., VIII, p. 486, 1887. Leucite-tephrite. Volcanello, JEolian. Islands, Italy. H. Backstrom. H. Backstrom, Q P Y XVIII, p. 159, 1896. Leucite-basanite. Pangkadjene, South Celebes. W. Bruhns. H. Bucking, Ber. Nf. Ges. Freib.,\ XI, p. 83, 1899. Biotite-leucite- basalt. El Capitan, Canbeligo County, New South Wales. J. C. H. Mingaye. David and Anderson, Rec. G. S. N. S. W., I, p. 156, 1890. Leucite-basalt. Byrock, New South Wales. J. C. H. Mingaye. David and Anderson, Rec. G. S. N. S. W., I, p. 156, 1890. Leucite-basalt. HAUYNOPHYRE, ETC. Aiguille de Giiery, Mt. Dore, Auvergne. E. Bonjean. E. Bonjean, C R CXXVIII, p. 1097, 1899. Haiiyne-tephrite. Not fresh. so 3 trace La Quenille, Mt. Dore, Auvergne. E. Bonjean. E. Bonjean, C R CXxVlII, p. 1097, 1899. Hauyne-tephrite. so 3 0.50 Roe Blanc, Mt. Dore, Auvergne. E. Bonjean. E. Bonjean, C R CXXVIII, p. 1097, 1899. Haiiyne-tephrite. so 3 0.25 Roc Blanc? Mt. Dore, Auvergne. E. Bonjean. E. Bonjean, C. R., CXXVIII, p. 1097, 1899. Hauyne-tephrite. Not fresh. Roc Blanc? Mt. Dore, Auvergne. E. Bonjean. E. Bonjean, C R CXXVIII, p. 1097, 1899. Hauyne-tephrite. so 3 Cl 0.21 0.07 Hohenstein, Bohemia. R. Pfohl. J. E. Hibsch, T. M. P. M., XIX, p. 82, 1900. Sodalite-tephrite. Cl trace Konigsbachthal, Bohemia. F. Hanusch. J. E. Hibsch, T. M. P. M., XIX, p. 76, 1900. Sodalite-porphyry. Cl low. so, 2.12 Summit, Mte. Vulture, Italy. L. Ricciardi. L. Ricciardi, Gazz. Chim. Ital., XVII, p. (7), 1887. Lava. Alkalies low. Mte. Vulture, Italy. L. Ricciardi. L. Ricciardi, Gazz. Chim. Ital., XVII, p. (5), 1887. Lava. Alkalies low. so 3 1.30 Mte. Vulture, Italy. L. Ricciardi. L. Ricciardi, Gazz. Chim. Ital., XVII, p. (6), 1887. Lava. Alkalies low. so 3 0.52 Mte. Vulture, Italy. L. Ricciardi. L. Ricciardi, Gazz. Chim. Ital., XVII, p. (7), 1887. “Oolitic rock” (lava). Alkalies low. so 3 2.07 Melfi, Mte. Vulture, Italy. L. Ricciardi. L. Ricciardi, Gazz. Chim. Ital., XVII, p. (10), 1887. Hauynophyre. Alkalies low. so 3 4.11 Melfi, Mte. Vulture, Italy. L. Ricciardi. L. Ricciardi, Gazz. Chim. Ital., XVII, p.- (9), 1887. Hauynophyre. Alkalies? \ 14128— No. 14—03 •30 406 CHEMICAL ANALYSES OF IGNEOL'S ROCKS HAUYNOPHYRE, ETC.—Continued. No. Si0 2 ai 2 o 3 Fe 2 0 3 FeO MgO CaO Na,0 K 2 0 h 2 o+ h 2 o- co 2 Ti0 2 PA MnO Sum Sp. gr. 14 41. 77 14. 05 4. 21 11.03 3.40 12. 52 6 . 23 1.38 1.80 trace 1.23 100. 27 I>3. V 1 15 1 39. 74 10.27 6 . 07 13.11 4.18 19.11 3. 12 0. 63 0. 50 0.41 0.63 101.03 2.630 D3. V 1 26° 16 36. 35 12. 37 5.26 11.71 7. 46 16. 82 2.07 1.38 4.11 0. 63 0. 42 100 . 80 2. 840 D3. V 1 26° IJOLITE, ETC. 1 45.18 23. 31 6.11 n. d. 1.45 4. 62 11.17 5. 95 1.14 98. 93 D4. V 1 2 i 46. 63 15. 03 5.91 5.09 3. 47 11.23 8.16 1.96 0. 35 1 . 12 trace 98. 95 D2. V j 3 1 42. 79 19. 89 4. 39 2. 33 1.87 11. 76 9. 31 1.67 0. 99 1.70 1. 70 0.41 98.81 D2. V I MELILITE ROCKS. 1 1 35. 91 11.51 2.35 5. 38 17. 54 13. 57 1.75 2.87 9.40 0. 23 n. d. • 100. 51 A3. Ill 1 2 1 35. 25 6.10 8 . 53 5. 60 20. 40 7. 40 0. 70 2 . 88 10.15 2. 25 99. 26 B3. IV 1 «3 t 33.10 7. 88 16. 71 1.48 13. 42 5. 25 0. 23 0. 29 17. 85 2. 90 99.11 C3. V 1 4 1 35. 54 11.72 5. 86 5. 99 13. 56 15. 83 1.91 2. 24 1.67 4. 30 2. 03 0. 32 100. 97 3. 052 B2. Ill 1 " 5 1 33. 87 15.25 2.37 5.15 12.52 14.43 1.41 1.02 2. 47 8 . 64 2.12 0. 99 0. 32 100. 36 3. 033 A2. II J 6 j 30. 69 10. 48 5. 76 7.47 11.10 13. 25 1.41 1.82 2 . 88 8 . 21 5. 52 0. 64 0. 55 99. 78 A2. II J 7 1 A2. II l 29. 25 8 . 80 3. 92 5.42 17.66 17. 86 0. 77 2. 45 2 . 61 6.00 2. 54 2 . 86 trace 100. 14 (100. 04) 8 1 24.19 12.00 6 . 45 9. 32 14. 07 17.37 1.99 3. 06 5.16 -- 2 . 77 trace 3. 96 trace 101.16 3.15 02. IV I 9 I 33. 89 9. 93 15. 63 n. d. 16.14 15.19 2 . 86 n. d. 2. 90 1.41 0. 64 1.41 trace 100 . 00 B4. V J 10 1 43. 36 9. 37 8 . 88 n. d. 10. 42 15. 38 1.49 3. 21 6 . 66 trace 98. 77 D4. V. 1 INFERIOR ANALYSES. 467 HAIJYNOPHYRE, ETC.—Continued. Inclusive. Locality. Analyst. Reference. Author’s name. Remarks. so 3 2.65 Mte. Vulture, Italy. L. Ricciardi. L. Ricciardi, Gazz. Chim. Ital., XVII, p. ( 8 ), 1887. Tuff. Alkalies? so 3 3.26 Melfi, Mte. Vulture, Italy. L. Ricciardi L. Ricciardi, Gazz. Chim. Ital., XVII, p. (9), 1887. Hauynophvre. Alkalies low. S0 3 2.12 Mte. Vulture, Italy. L. Ricciardi. L. Ricciardi, Gazz. Chim. Ital., XVII, p. ( 6 ), 1887. Lava. Alkalies low. IJOLITE, ETC. Beemerville, Sussex County, New Jersey. F. W. Love? J. F. Kemp, Tr. N. Y. Ac. Sci., XI, p. 67, 1892. Nephelite-porphyry (sussexite). Kaljokthal, Kola, Finland. H. Berghell. V. Hackman, Fennia, XI, No. 2, p. 185, 1894. Ijolite. Iiwaara, Kola, Finland. H. Berghell. Ramsav and Berghell, (7 F* F XIII, p. 302, 1891. Ijolite. MELILITE ROCKS. St. Anne de Bellevue, n. Montreal, Canada. P. H. le Ros- signol. F. D. Adams, A. J. S., XLIII, p. 271, 1892. A Indite. Not fresh. Manheim, Herkimer County, New York. C. H. Smyth, jr. C. H. Smyth, jr., B. G. S. A., IX, p. 262, 1898. A Indite. Not fresh. Manheim, Herkimer County, New York. C. H. Smyth, jr. C. H. Smyth, jr., B. G. S. A., IX, p. 262, 1898- Alndite. Much weath ered. Naversdale, Orkney Islands. J. S. Flett. J.S. Flett, Tr. R. Soc. Edinb., XXXIX, pt. 4, p. 897, 1900. A Indite. Not fresh. Long Geo, Holm, Orkney Islands. J. S. Flett, J. S. Flett, Tr. R. Soc. Edinb., XXXIX, pt. 4, p. 898, 1900. Melilite- monchiquite. Not fresh. Storkalfven, Rddo, Sweden. H. Santesson. P. J. Holmquist, Afh. Sver. G. Und., No. 181, p. 86,1899. Alndite. Not fresh. Dried at 110 °. Norrwik, Alnd, Sweden. N. Sahlbom. N. Sahlbom, N. J., 1897, II, p. 100. Alndite. Not fresh. 0.25 F (calc, omitted. Cl Cr 2 0 3 0.53 0.29 trace Stornaset, Alno, Sweden. F. Berwerth. Raimann and Berwerth, Ann. K. Iv. Nh. Hof. Mus., X, p. 76, 1895. Alndite. Not fresh. Dried at 130°. S Cr»0 3 trace trace Hochbohl, Owen, Wurtemberg. J. Meyer. A. Stelzner, N. J. B. B., II. p. 398, 1883. Melilite-basalt. Not fresh. Calc, from Sol. and Insol. Mte. Terminillo, Rieti, Italy. L. Brugnatelli. L. Brugnatelli, B. Com. G. Ital., XIV, p. 318, 1883. , Melilite-pyroxene rock. 468 CHEMICAL ANALYSES OF IGNEOUS ROCKS LIMBURGITE. No. Si0 2 A1A Fe,O s FeO MgO 1 CaO Na 2 0 K 2 0 H 2 0+ H,0- co. 2 Ti0 2 PA MnO Sum Sp. gr. 1 A2. II. • 36.80 4.16 n.' d. 8 . 33 25. 98 8 . 63 0.17 2. 48 6 . 93 0. 51 • 2. 95 1 . 26 • 0.47 0.13 100 . 22 2 D4. V | 44. 47 10. 97 n. d. 13. 08 6 . 24 12 . 66 4. 58 1.68 . 2. 27 none 3. 56 trace 101.70 3 B4. V | 43. 33 11.06 n. d. 15. 25 6 . 24 12 . 66 4.58 1 . 68 1.43 ■ none 4. 63 trace 100 . 86 4 B4. V • 42. 61 11.55 n. d. 12. 27 12.10 13. 43 1.06 2 . 80 4. 33 100.15 5 B4. V | 40.48 8 . 93 20. 05 n. d. 11.12 13. 03 2. 05 1.26 3.37 100. 29 2. 931 6 C4. V | 42. 30 12. 74 10 . 60 n. d. 12. 74 13. 01 2. 65 0. 94 2.54 1.51 99. 03 7 B4. V j 39. 07 13. 70 20. 92 n. d. 6 . 90 10. 04 2.1 58 3. 53 2. 46 0 . 21 0.52 0. 55 100. 89 8 D4. V J 53. 92 17.98 n. d. 4. 88 4. 57 7.59 3. 92 1.14 4. 64 98. 64 9 B3. IV J 39. 32 17.53 3. 07 9.12 8 . 00 10. 38 2. 44 2. 04 5. 10 2 . 20 ' • 99. 20 PYROXENITE. 1 D4. V | 43. 35 29. 75 5. 61 n. d. 2. 03 12. 46 trace 5. 93 0. 73 99. 86 2 B4. IV | 54.12 7.91 n. d. 12. 87 16. 64 6 . 21 0.44 1.19 n. d. 99. 38 3. 30 3 C4. V | 46. 86 9. 80 16. 35 n. d. 18. 08 9.57 trace trace 0. 67 101.33 3. 333 PERIDOTITE. 1 I V \ 20.85 5. 55 45.62 16. 45 0. 73 n. d. n. d. n. d. 9. 93 trace 99. 69 D4. V 1 ■ 2 1 37. 44 28. 60 11.92 n. d. 1.97 5. 45 0. 97 1.02 12. 67 100. 04 1)4. V J o 1 33. 80 6.84 12 . 26 n. d. 21.38 9.50 n. d. n. d. 15. 20 98. 98 2. 732 D4. V j 4 41. 00 7. 58 5. 99 4. 63 23. 59 10 . 08 0. 52 n. d. 4.73 3. 62 trace 101.74 2. 989 D3. V J . 5 1 34. 50 14.37 2 . 85 4.46 21 . 81 11.48 0.51 1. 50 7.14 0. 21 0. 77 100.15 A2. II ] INFERIOR ANALYSES. 469 LIMBURGITE. Inclusive. Locality. Analyst. Reference. Author’s name. Remarks. SO : , 0.06 S 0.95 NiO 0.09 BaO 0.12 SrO trace Syracuse, New York. H. N. Stokes. Barton and Kemp, A. J. S., XLIX, p. 461, 1895. Limburgite. Not fresh. Wesenweiler, Kaiserstuhl, Baden. A. Knop. A. Knop, Der Kaiserstuhl, Leipzig, 1892, p. 283. Limburgite. MgO, CaO, Na. 2 0, and K 2 0? Eichelspitze, Kaiserstuhl, Baden. A. Knop. A. Knop, Der Kaiserstuhl, Leipzig, 1892, p. 281. Limburgite. MgO, CaO, Na 2 0, and K 2 0? Limburg, Kaiserstuhl, Baden. A. Knop. A. Knop, Der Kaiserstuhl, Leipzig, 1892, p. 296. Limburgite. Not fresh. 2.11 H,0. Ig¬ nited before analysis. Kaiserstuhl, Baden. A. Lagorio. A. Lagorio, T. M. P. M., VIII, p. 479, 1887. Limburgite. Reiehenweier, Voge- sen, Elsass. * G. Linck. G. Linck, Mt: Com. G.-L. U. Es., I, p. 60, 1887. Limburgite. S0 3 0.18 Cl 0.13 F trace Pardubic, Bohemia. F. Kovar. F. Kovar, Cf. G. Cb., I, p. 514, 1901. Limburgite. Chichishima, Bonin Islands, Japan. J. Petersen. J. Petersen, Jb. Hamb. Wise. Anst., VIII, p. 30, 1891. Boninite (bronzite- limburgite). A1,0 3 high. Bendigo, Victoria, Australia. A. W. Howitt. A. W. Howitt, Cf. N. J., 1894, II, p. 271. » Limburgite. PYROXENITE. Rosetown, West of Stony Point, New York. J. F. Kemp? J. F. Kemp, A. J. S., XXXVI, p. 250, 1888. Hornblende-augite rock. A1 2 0 3 high. MgO low. Jackass Creek, Mon¬ tana. V G. P. Merrill. G. P. Merrill, Pr. U. S. Nat. Mus., XVII, p. 662, 1895. W ebsterite. Pallavaram, Madras, India. T. L. Walker. T. H. Holland, Mem. G. S. Ind., XXVIII, p. 166, 1900. H ypersthenite. PERIDOTITE. S trace Iron Mine Hill, Cumber¬ land, Rhode Island. T. Drown. M. E. Wadsworth, Lithol. Stud., 1884, p. XVI. Cumberlandite. Ithaca, New York. • W. H. Morrison. J. F. Kemp, A. J. S., XLII, p. 412, 1891. Peridotite. Not fresh. Manheim, Herkimer County, New York. C. W. Smith, jr. C. H. Smyth, jr., A. J. S., XLIII, p. 325, 1892. Peridot! te. Not fresh. Pikesville, Baltimore County, Maryland. L. McCav. G. H. Williams, B. U. S. G. S., 28, p. 54, 1886. Peridotite. Feldspathic. Not fresh. S0 3 0.60 Marion, Crittenden County, Kentucky. L. G. Eakins. J. S. Diller? B. U. S. G. S., 148, p. 94, 1897. Mica-peridotite. Not fresh. Not described. 470 CHEMICAL ANALYSES OF IGNEOUS ROCKS PERIDOTITE—Continued. No. Si0 2 A1A FeA FeO MgO CaO Xa./> k 2 o H,0+ KS o 1 CO, TiO, PA MnO Sum Sp. gr. 6 Al. I j 29. 81 2.01 5.16 4. 35 32.41 7. 69 0.11 0.20 8. 92 6. 66 2. 20 0. 35 0. 23 100. 86 2. 781 7 A2. II | 29.43 2.36 n. d. 9.06 31. 66 6. 94 0. 78 0. 65 10. 90 5. 65 1.48 trace 100. 15 2. 697 8 Al. IV | 42. 71 0. 70 n. d. 6.83 41.18 n. d. n. d. n. d. 8.38 0.09 100. 21 3.10 9 Al. I | 37. 36 4. 76 6.61 6. 12 31.11- 1.19 trace trace 10. 37 0. 65 none 0. 79 0. 06 trace 99. 68 10 D3. V | 43.65 6.81 15. 94 5. 14 12. 91 4. 86 0. 43 0.52 7.46 1.12 98. 84 11 B4. V j 46.35 16.41 11. d. 9.91 18. 72 6.14 n. d. n. d. 3.01 100. 54 3. 21 12 B4. V | 47. 41 16. 03 2. 66 7. 05 5. 81 12. 33 4. 47 as Nad) 2.19 1.29 trace 99.24 2. 96 13 Al. I 14 D4. V J 44.81 1.88 1.98 4.52 30. 91 6. 58 0. 15 6. 88 0.15 1.79 none 0.02 0.13 100.18 | 42.10 3. 28 8. 27 2.13 30. 65 3. 77 4 1. 90 7. 73 0. 70 100. 53 2. 82 15 B3. IV 16 C3. V | 38.6 3.7 7. 6 7.8 27. 7 7. 7 none 0.2 6.4 99.8 3. 00 | 37.8 9. 7 3.4 7.0 22.9 4.1 0.8 trace 14.0 99.7 17 A4. IV j 49. 10 8. 48 5. 79 n. d. 20. 85 12.90 1.67 0. 56 0. 23 trace 100.15 18 A2. II | 38. 35 7.03 6. 82 8.68 25. 69 0.12 0. 40 0. 45 10. 89 0.90 0.12 99. 67 2. 73 19 A 4. V j- 39. 42 1.62 4. 70 4. 73 34.19 1.56 n. d. n. d. 12. 29 0.37 0. 89 100. 23 2. 86 20 D2. V 1 | 38. 82 0.39 3. 32 4.08 43. 45 trace 0. 08 0. 09 8. 47 1.13 0.15 103. 41 (100. 04) 2. 819 21 D3. V | 41.35 13. 90 8.24 7.13 8. 79 11. 65 0.15 0.16 5. 35 2. 70 0. 22 99.64 22 B3. IV j 40. 65 12. 85 4. 88 8.30 18. 05 8. 05 1.38 0. 91 2. 70 2. 30 0.64 100.71 23 D3. V J 39. 75 14. 40 7. 58 8. 57 6.17 12.65 0. 81 0. 28 2.15 6. 50 0.71 99. 57 24 D3. V | 39.05 13. 95 8.16 6. 25 8. 89 14.02 0. 55 0. 89 2. 95 5.10 0. 55 100. 36 INFERIOR ANALYSES. 471 PERIDOTITE—Continued. Inclusive. Locality. Analyst. Reference. Author’s name. Remarks. so 3 Cr»0 3 NiO 0.28 0.43 0.05 Willard, Elliott County, Kentucky. T. M. Chatard. J. S. Diller, A. J. S„ XXXII, p. 125, 1886. Peridotite. Not fresh. Also in B. U. S. G. S. 38, p. 24, 1887. so 3 s Cr 2 0 3 NiO 0.30 0.20 0.14 0.60 Near Willard, Elliott County, Kentucky. Peter and Kastle. J. S. Diller, B. U. S. G. S., 38, p. 24, 1887. Peridotite. ' Not fresh. Cr 2 0 3 NiO trace 0.32 Laurel Creek, Rabun County, Georgia. W. H. Emerson. F. P. King, B. G. S. Georg., No. 2, p. 81, 1894. Dunite. Not fresh. CI0O3 NiO 0.62 0.04 Crystal Falls, Michigan. H. N. Stokes. J. M. Clements, M. U. S. G. S., XXXVI, p. 219, 1899. Picrite-porphyry. Not fresh. Near Morton, Minnesota River, Minnesota. A. D. Meeds. C. W. Hall, B. U. S. G. S., 157, p. 113, 1899. Saxonite. Not fresh. Between North and South Meadow creeks, Montana. G. P. Merrill. G. P. Merrill, Pr. U. S. Nat. Mus., XVII, p. 656, 1895. Saxonite. AIA high? The Potrero, San Francisco, California. C. Palache. C. Palache, B. Dep. G. Un. Cal., I, p. 177, 1894. Lherzolite. Cro0 3 NiO BaO SrO 0.29 0.09 none none Near Strawberry Val¬ ley, Butte County, California. W. F. Hillebrand. H. W. Turner, J. G., Ill, p. 403, 1895. Peridotite. Not fresh. Also in 17 A. R. U. S. G. S., I, p. 735, 1896. Caithness, Scotland. H. R. Mill. J. W. Judd, Q. J. G. S., XLI, p. 402, 1885. Scy elite. Not fresh. From 3 poor partial anal¬ yses. Cr,0 3 0.1 Loch Garabal, Scotland. J. H. Player. Dakyns and Teall, Q. J. G. S., XLVIII, p. 145, 1892. Olivine-diallage rock. Not fresh. Firth of Forth, Scot¬ land. T. Waller. J. W. Judd, Q. J. G. S., XLI, p. 400, 1885. Picrite. Not fresh. AU0 3 high. Or»0 3 0.57 Tue d’Ess, Pyrenees. Strvesco. A. Lacroix, cf. N. J., 1895, II, p. 267. Lherzolite. S0 3 0.22 Stoppenberg, Harz Mountains. K. Hampe. Iv. A. Lossen, Z. D. G. G., XL, p. 372, 1888. Paleopikrite. Not fresh. Cr. Spine! 0.47 Kbltschenberg, Silesia. H. Traube. H. Traube, cf. N. J., 1885, I, p. 241. Olivine-diallage rock. Not fresh. S0 3 Cr,0 3 Org trace 3.32 0.11 Habendorf, Silesia. K. Hampe. FI. Dathe, Jb. Pr. G. L-A., IX, p. 327, 1889. Peridotite. Sum uncertain. Not fresh. Stranik, Hotzendorf, Moravia. C. F. Eichleiter. C. F. Eichleiter, Vh. Wien. G. R-A., XXX, p. 76, 1896. Picrite. MgO low. Not fresh. Sohle, Moravia. C. F. Eichleiter. C. F. Eichleiter, Vh. Wien. G. R-A., XXX, p. 76, 1896. Picrite-porphyry. Not fresh. Near Mtschenowitz, Moravia. C. F. Eichleiter. C. F. Eichleiter, Vh. Wien. G. R-A., XXX, p 75, 1896. Picrite. MgO low. Not fresh. Zamrsk, n. Keltsch, Moravia. C. F. Eichleiter. C. F\ Eichleiter, Vh. Wien. G. R-A., XXX, p. 74, 1896. Picrite. MgO low. Not fresh. I 472 CHEMICAL ANALYSES OF IGNEOUS ROCKS. PERIIK >TITE—Continued. No. Si0 2 ai 2 0 3 Fe 2 O s FeO MgO CaO Na.,<) K,0 H,Of H.,0— C0 2 Ti0 2 P-A MnO Sum Bp. gr. 25 1 38. 72 2. 55 4.50 3. 76 41. 36 n. d. 0. 57 n. d. 7.70 99.16 C4. V 1 26 1 40.30 9. 45 7.30 n. d. 21. 20 3. 48 4. 93 0. 90 16. 00 100. 56 B4. V 1 27 1 34.80 in FeO. n. d. 14.40 30. 76 2. 70- 1.40 n. <1. 10. 60 5. 55 inSi0 2 100.21 2. 67 D4. V 1 28 1 33. 00 in FeO. n. d. 12. 00 32. 38 9. 60 0. 67 n. d. 6. 00 7.05 inSiO., 100. 70 2. 734 D4. V j 29 1 43. 84 1.14 8. 76 n. d. 44. 33 1.71 n. d. n. d. 1. 06 0.12 101.38 3. 287 C4. V 1 INFERIOR ANALYSES. 473 PERIDOTITE—Continued. Inclusive. Locality. Analyst. Reference. Author’s name. Remarks. Solwa-Supreya, Ural Mountains, Russia. Krekmever. Loewinson-Lessing, G. Sk. Jushno. Dorpat, 1900, p. 166. Dunite. Not fresh. Kimberley, Griqualand, South Africa. Not stated. L. de Launay, C R CXXV, p. 336, 1897. Peridotite breccia. Not fresh. Kimberley, Griqualand, South Africa. H. C. Lewis. H. C. Lewis, Gen. of the Diamond, London, 1897, p. 47. Kimberlite. Not fresh. Kimberley, Griqualand, South Africa. H. C. Lewis. H. C. Lewis, Gen. of the Diamond, London, 1897, p. 47. Kimberlite. Not fresh. Cr..0 3 0.42 NiO 0.51 St. Paul’s Rocks, Atlantic Ocean. Sipocz. Cf. J. J. H. Teall, Brit. Petr., London, 1888, p. 103. Saxonite. • GLOSSARY OF NEW TERMS EMPLOYED IX THIS PAPERS A. Actual mineral composition. The composition of a rock in terms of the minerals actually present, expressed quantitatively. Alferric. Having the characteristics of, or belonging to, the group of aluminous ferromagnesian and calcic silicates. Alkalicalcic. Having salic alkalies and salic lime present in equal or nearly equal amounts. Alkalimirlic. Having femic alkalies and magnesia, ferrous iron, and femic lime in equal or nearly equal amounts. C. Calcimiric. Equally calcic and miric, or nearly so. Class. Division of igneous rocks based on the relative proportions of salic and femic standard minerals. D. Do- (or Dom-). Prefix indicating that one factor dominates over another within the ratios f and f. Docalcic. Dominantly calcic. Of salic minerals when C'aO / dominates over K 2 0 / '+Na 2 0 / ; of femic minerals when CaO // dominates over MgO+FeO. Dofelic. Dominantly felic, having normative feldspar dominant over normative quartz or lenads. Dofemic. Dominantly femic, having femic minerals dominant over salic. Doferrous. Dominantly ferrous, having FeO dominant over MgO. Dohemic. Dominantly hemic, having hemic minerals (magnetite, hematite) dominant over the tilic minerals (titanite, ilmenite, perofskite, rutile). Dolenic. Dominantly lenic, having the lenads (leucite, nephelite, the sodalites) dominant over feldspar. Domagnesic. Dominantly magnesic, having MgO dominant over FeO. Domalkalic. Dominantly alkalic. Of salic minerals when K 2 0' + Na 2 0 / dominates over CaO / ; of femic minerals when K 2 0 // -f- Na 2 0 // dominates over MgO -b FeO + CaO // . Dominant. Said of a factor which dominates over another within the ratios f and f. Used in connection with a fivefold comparison. Domiric. Dominantly miric, having MgO — FeO dominant over CaO // . Domirlic. Dominantly mirlic, having MgO — Feo — CaO" dominant over K 2 0 // +Na 2 0 // . Domitic. Dominantly mitie, having mitic minerals (magnetite, hematite, ilmenite, etc.) domi¬ nant over polic minerals (pyroxene, olivine, akermanite). a The definitions here given are, for the most part, selected from those to be found in the glossary of Quantitative Classification of Igneous Rocks, by Cross, Iddings, Pirsson, and Washington, Chicago, 1903. Magmatic rock names are not included, but will be found in a separate index. 475 CHEMICAL ANALYSES OF IGNEOUS ROCKS. 476 Domolic. Dominantly olio, having normative olivine and akermanite dominant over normative pyroxenes. Dopolic. Dominantly polio, having polio minerals (pyroxene, olivine) dominant over mitic minerals (magnetite, ilmenite, etc.). Dopotassic. Dominantly potassic, having K 2 0 dominant over Na 2 0. Dopyric. Dominantly pyric, having normative pyroxene dominant over normative olivine and akermanite. Doquaric. Dominantly quaric, having normative quartz dominant over normative feldspar. Dosalic. Dominantly salio, having salio minerals dominant over femic. Dosodic. Dominantly sodio, having Na 2 0 dominant over K 2 0. Dotilic. Dominantly tilic, having tilic minerals (titanite, ilmenite, etc.) dominant over hemic minerals (magnetite, hematite). E. Extreme. Said of a factor that is present alone or in amount greater than q of the other factor. F. Fel. Syllable mnemonic of feldspar. Felic. Having the properties of, or containing, normative feldspars. Fern. Term mnemonic of the second group of standard minerals, including nonaluminous ferromagnesian and calcic silicates, silicotitanates, and nonsiliceous and nonaluminous minerals. Femic. Having the character of, or belonging to, the second (fern) group of standard minerals. Ferrosilite. Name given to the ferrous hypersthene molecule, FeSi0 3 . G. Grad. Division of subrang based on the proportions of minerals of the subordinate group of standard minerals when present in notable amount. i H. Habit. Resemblance in general appearance, both in texture and mode. Hem. Syllable mnemonic of hematite and magnetite. Hemic. Having the character of, or containing, the minerals hematite and magnetite. I. Inferior. Adjective applied to analyses of the last two ratings; that is, either poor.or bad. E. Len. Syllable mnemonic of leueite and nephelite, including sodalite and noselite. Lenad. One of the standard minerals, leueite, nephelite, sodalite, noselite. Equivalent to eldspathoid (French feldspathide). Lenadic. Having the character of, or belonging to, the lenads. Lendofelic. Having normative feldspars dominant over lenads. Lenfelic. Having normative feldspars and lenads in equal, or nearly equal, amounts. M. Magnesiferrous. Equally magnesic and ferrous, or nearly so. Mar. Syllable mnemonic of magnesia and ferrous iron. Miric. Characterized by the presence of MgO or FeO, or both. Opposed to calcic. GLOSSARY OF NEW TERMS. 477 Mirl. Syllable mnemonic of magnesia, ferrous iron, and lime. Mirlic. Characterized by the presence of MgO, FeO, and CaO". Opposed to femic alkalic. Mit. Syllable mnemonic of magnetite, ilmenite, and titanite, and including all the minerals of the second subgroup of femic minerals. Mitic. Having the characters of the above-mentioned minerals. Modal. Relating to the mode. Mode. The actual mineral composition of a rock. Opposed to norm, with which it may or may not coincide. N. Negligible. Term applied to the amount of any chemical or mineral factor when it is less than one-eighth of the group of factors under consideration. Norm. The standard mineral composition of a rock; that is, the chemical composition expressed in terms of standard minerals. Opposed to mode, with which it may or may not coincide. Normative. Relating to the norm. That which makes up the norm. Notable. Term applied to the amount of any chemical or mineral factor when it is greater than one-eighth of the group of factors under consideration. O. 01. Syllable mnemonic of olivine, including also akermanite. Olic. Having the properties of, or containing, normative olivine or akermanite. Order. A division of subclass based on the relative proportions of the standard mineral subgroups > in the preponderant group. P. Per-. Prefix to indicate that a factor is present alone or in extreme amount; that is, that its ratio to another factor is >f. Peralkalic. Extremely alkalic. Of salic minerals when K. J 0 / +iSa,0 / is extreme over Ca< V; of femic minerals when K 2 0 // -f-Na 2 0 // is extreme over MgO+FeO-f CaO". Percalcic. Extremely calcic. Of salic minerals when CaO / is extreme over E 2 0 / +Na 2 0 / ; of femic minerals when C'aO" is extreme over MgO+FeO. Perfelic. Extremely felic, with normative feldspar extreme over normative quartz or lenads. Perfemic. Extremely femic, having the femic minerals extreme over the salic. Perferrous. Extremely ferrous, having FeO extreme over MgO. Perhemic. Extremely hemic, having hemic minerals (magnetite, hematite) extreme over the tilic minerals (ilmenite, titanite, etc.). Perlenic. Extremely lenic, having lenic minerals (leucite, nephelite, sodalite, noselite) extreme over the felic minerals (feldspars). Permagnesic. Extremely magnesic, having MgO extreme over FeO. Permiric. Extremely miric, having MgO+FeO extreme over CaO /r . Permirlic. Extremely mirlic, having MgO+FeO-t-CaO" extreme over K._,0 // +Na._,0 // . Permitic. Extremely mitic, having mitic minerals (magnetite, ilmenite, hematite, etc.) extreme over the polic minerals (pyroxene, olivine, akermanite). Perolic. Extremely olic, having olic minerals (olivine, akermanite) extreme over the pyric minerals (pyroxenes). Perpolic. Extremely polic, having polic minerals (pyroxenes, olivine, akermanite) extreme over the mitic minerals (magnetite, hematite, ilmenite, etc.). 478 CHEMICAL ANALYSES OF IGNEOUS HOCKS. Perpotassic. Extremely potassic, having K 2 0 extreme over Na 2 0. Perpyric. Extremely pyric, having the pyric minerals (pyroxenes) extreme over the olic minerals (olivine, abermanite). Perquaric. Extremely quaric, having normative quartz extreme over normative feldspar. Persalic. Extremely salic, having salie minerals extreme over the femic. Persodic. Extremely sodic, having Na 2 0 extreme over K 2 0. Pertilic. Extremely tilie, having tilic minerals (ilmenite, titanite, etc.) extreme over the hemic minerals (magnetite, hematite). Pol. Syllable mnemonic of the femic silicates, pyroxene and olivine, including akermanite. Polic. Characterized by the presence of the femic silicates. Polmitic. Having equal, or nearly equal, amounts of the polic and mitic minerals. Pre-. Prefix indicating the predominance of one factor over another in a ratio > f. Prealkalic. Predominantly alkalic. Of salic minerals when KjO'+Na-O 7 predominates over CaO / ; of femic minerals when K 2 0 // -f-Na 2 0 // predominates over MgO+FeO+CaO // . Precalcic. Predominantly calcic. Of salic minerals when CaO / predominates over K.,0 / -f Na.,0 // ; of femic minerals when CaO'' predominates over MgO-f FeO. Predominant. Said of a factor which preponderates over another in a ratio greater than *. Used in connection with a threefold comparison. Prepotassic. Predominantly potassic, having K 2 0 predominant over Na 2 0. Presodic. Predominantly sodic, having Xa 2 0 predominant over K 2 0. Pyr. Syllable mnemonic of pyroxenes. Pyric. Characterized by the presence of normative pyroxene. Pyrolic. Having equal or nearly equal amounts of normative pyroxene and olivine or akermanite. Q. Quar. Syllable mnemonic of quartz. Quardofelic. Having felic minerals (feldspar) dominant over normative quartz. Quarfelic. Having equal, or nearly equal, amounts of normative quartz. Quaric. Characterized by the presence of normative quartz. R. Rang. A division of order based on the character of the chemical bases in the preponderant group of standard minerals. Rating. The relative standing of an analysis, based on its accuracy and completeness. S. Sal. Syllable mnemonic of the silico-aluminous nonferromagnesian group of standard minerals, including quartz, feldspars, lenads, corundum, and zircon. Salfemic. Having salic and femic minerals in equal, or nearly equal, amounts. Salic. Having the characters of, or belonging to, the first (sal) group of standard minerals. Section. Subdivision of any of the other taxonomic divisions from class to subgrad. Standard mineral. One of the minerals or mineral molecules selected to express the chemical composition of an igneous rock. Standard mineral composition. The composition of a rock expressed in terms of the standard minerals as calculated from the chemical analysis. GLOSSARY OF NEW TERMS. 479 Subclass. Division of class based on certain broad chemical differences in the preponderant standard mineral group. Subgrad. Division of grad, based on the chemical character of the minerals used in forming the grad. Suborder. Division of order, based on certain chemical differences in the preponderant mineral group. Subrang. Division of rang, based on the character of the chemical bases in the preponderant mineral subgroup used in forming rang. Superior. Adjective applied to analyses of the first three ratings; that is, either excellent, good, or fair. T. Til. Syllable mnemonic of the titaniferous femic minerals, titanite and ilmenite, including perofskite and rutile. Tildohemic. Having hemic minerals (magnetite, hematite) dominant over the tilic minerals (ilmenite, titanite, etc.). Tilhemic. Having equal, or nearly equal, amounts of hemic and tilic minerals. Tilic. Having the characters of, or pertaining to, the titaniferous femic minerals. Type. A rock which forms a standard by which to indicate identity in norm, mode, and texture, or a close approximation to identity. V. Varietal. Having the character of, or producing, a variety of a mode. Variety. A division of a mode, recognizing the presence of subordinate mineral components. PREFATORY NOTE TO INDEXES. For the information of those who may use the following - indexes a few words of explanation are here presented. It must be borne in mind, both here and throughout the tables, that the opposite pages belong and are to be considered together. Reference to an even- numbered page implies, therefore, the opposite odd-numbered one, and vice versa. Similarly the divisions of the new system, and the names, although placed for typographical reasons on one page or the other, apply to both. Thus, liparase on page lid and liparose qn page 115 are to be taken together. It will be convenient to remember that Part I, which contains the superior analyses, ends with page 369, while Part II, in which are found the inferior analyses and those of tuffs, etc., begins with page 372. This is shown in the indexes by semicolons, marking the division. In the index to old names, mineral qualifiers have been omitted in most cases, especially when the mineral name indicates no special magmatic character. Thus biotite-andesite, hornblende-andesite, and hypersthene-andesite are to be looked for under andesite. When, however, the mineral qualifier indicates a distinctive magmatic character it will be given, as in the case of nephelite- syenite, quartz-basalt, quartz-diorite, or if its presence is of special interest, as in cordierite-andesite, analcite-tinguaite. As a rule, however, the small rock groups are not thus distinguished. Textural qualifiers are also usually omitted, as in andesite-porphyry, which will be found under andesite, though granite- porphyry, diorite-porphyry, etc., are retained. Tuffs will be found under their respective rocks. In using this index it must also be borne in mind that many synonyms are in use, so that liparites may be found under rhyolite, dolerites under basalt, etc. The terms porphyry and porphyrite are also frequently interchanged, as usage is not uniform. In the index to localities the primary arrangement is by countries and sepa¬ rate islands, etc. Under countries the arrangement is by States or provinces, etc. Thus under Great Britain will be found England, Ireland, etc. This has 14128—No. 14—03-31 481 482 PREFACTORY NOTE TO INDEXES. not been done in the case of small countries or those represented by few anal¬ yses. In Germany a number of well-defined mountainous regions are given separately when they extend into more than one province, as the Harz Moun¬ tains. On the other hand, the rocks of the Odenwald, for instance, will be found under Hesse, and those of the Schwarzwald and the Kaiserstuhl under Baden. Islands near the coast of a country to which they belong are listed separate!} 7 , under the head of the country, as with the iEolian and Orkney Islands. Colonies are, of course, given a separate head, as with Algeria. In view of the very large number of localities, it was not deemed expedient to index the exact locality names. But by comparing the indexes of either the new or the old rock names with that of localities, the reference to any desired rock will usually be readily found. INDEX TO TEXT. A. Page. Abbreviations, tables of. 116-119 for names of journals, etc., discussed. 71 Abich, H., cited. 11 Accuracy of analyses, defined. 19 Agreement of analysis with the mode. 30 Alkalies, possible errors in determination of. 22,24,33 Alumina, possible errors in determination of. 21,31,32 Altered rocks, analyses of. 18 Analyses, accuracy of. 19 accuracy of, a factor in rating. 29-36 agreement of, with the mode. 30 arrangement of, in tables. 46 reasons for. 59 character of. 13-43 completeness of. 23-28 a factor in rating. 37 geographical arrangement of. 64 methods of. 20,36 number of, of different ratings. 66 numbering of. 65 poor quality of. 15, 66 rating of. 28-38,65 representativeness of. 16-19 summation of. 33-36 tabular statement of number of... 54 Analyst, character of, discussed. 14,20,36 statement of, in tables. 70 Andesite, position of, in new system. 74 Anorthosite, position of, in new system. 75 Aplite, position of, in new system. 73 Ashes, analyses of, to be found in Part II. 44,45 Austin, M., cited. 22 Average igneous rock, calculation of. 106-115 character of. 108,115 B. Bad, definition of, as applied to analyses. 41 Barium, determination of. 25,26 Basalt, position of, in new system. 75 Basanite, position of, in new system. 75 Bischoff, G., cited .. 12 Brittleness of minerals, difference in. 19 Bunsen, R., theory of, mentioned. 12 C. Carbonic acid, determination of. 28,37 Center points, calculation of. 81-92 definition of. 82 of perfemane, calculation of. 88 tabular statement of. 97 of persalane, calculation of. 84 tabular statement of. 93 Page. Chlorine, correction for. 34 determination of. 25,37 Chromium, determination of.1. 26,37 occurrence of. 25 Clarke, F. W., cited. 25,27,106 Classification, defects in present system of. 46,62 quantitative, adopted in present work. 59 correlation of, with qualitative. 72-81 description of. 47 reasons for adoption of. 59 tabular statement of. 54-59 ' Columbia University, acknowledgments to librarian of. 9 Constituents, main, determination of. 24 minor, determination of. 25 statement of, in tables, discussed. 67 Contradictions to principles, apparent instances of ... 63 Cordier, investigations of, referred to. 11 Correlation of quantitative and qualitative systems of classification. 72-81 Correspondence of norm and mode. 69 Cossa, cited. 32 Cross, Whitman, acknowledgments to. 9 cited. 11,31,46 letter of transmittal by. 5 Cross, Iddings, Pirsson, Washington, cited. 7. 31,44,47,63,69,109 D. Dacite, position of, in new system. 74 Diabase, position of, in new system. 75 Diorite, position of, in new system. 74 Dittrich, M., cited. 28 Durocher, liquation hypothesis of. 13 E. Errors, possible, in analytical work. 20-23,30 examples of . 31-33 influence of, in selection of analyses. 43 Essexite, position of, in new system. 75 Europe, division of, into zones... 64 Evidence of accuracy of analyses, external. 36 indirect. 36 internal. 30-36 Excellent, definition of, as applied to analyses. 41 P. Fair, definition of, as applied to analyses. 41 Ferric oxide, possible errors in determination of.21,22 Ferrosilite, use of term. 90 Ferrous oxide, possible errors in determination of .... 21,22 Fifth rate, definition of, as applied to analyses. 41 483 484 INDEX TO TEXT. Page. First rate, definition of, as applied to analyses. 41 Fluorine, correction for. 34 Fourth rate, definition of, as applied to analyses. 41 G. Gabbro, position of, in new system. 75 Geographical arrangement of analyses, discussion of.. 64 Gooch, F. A., cited. 22 Good, definition of, as applied to analyses. 41 Granite, position of, in new system. 73 Granodiorite, position of, in new system. 74 Groundmass, analyses of. 29 H. Harker, A., cited. 106 Harrison, J. B., acknowledgments to. 9 Hibsch, J. E., cited. 32 Hillebrand, W. F., acknowledgments to. 10 cited. 14,15,21,22,25,34,35 I. Iddings, J. P., acknowledgments to. 10 term ferr-osilite suggested by. 90 Ijolite, position of, in new system. 75 Inferior, definition of, as applied to analyses. 42 Igneous rock, average, calculation of. 106-115 character of. 108,115 Iron oxides, errors in, affecting selection of analyses.. 43 errors possible in determination of.21,22,24,32 importance of separate determination of_ 24,34,37,43 K. Kemp, J. F., acknowledgments to. 9 cited . . 32,67 Klein, C., cited. 33 L. Lang, H. O., cited... 32 Lime, possible errors in determination of. 22 salic, attention called to, in calculations. 60 Lithium, determination of .... 27 Loewinson-Lessing, cited. 50 Locality, statement of, in tables.1_ 69 Loss on ignition. 28,37 M. Magmas, distribution of. 100,102 Magnesia, possible errors in determination of... 21,22,31,32 Main constituents, determination of. 24 behavior of, in analysis. 27 Manganese, determination of. 24,27 errors possible in determination of...._.. 23,33 small amount of, in igneous rocks. 27 Material, amount of, for analysis. 18 Melilite-basalt, position of, in new system. 75 Meteorites, analyses of, omitted. • 9 position of, in new system. 81 Microscopical examination, need of. 19,25 Minor constituents, determination of. 25 Mitscherlich method, unreliability of. 21 Mode, agreement of analysis with. 30 calculation of chemical composition from. 30 correspondence of, with the norm. 69 Molecular ratios, statement of, in tables. 67 Page. Molybdenum, occurrence of. 25 Monzonite, position of, in new system. 74 N. Name roots, number of, discussed. 50 Names, number of, discussed. 49 Nephelite-syenite, position of, in new system. 74 Neues Jahrbuch, references to analyses in... 70 Nickel, determination oi.,. . 26,37 occurrence of. 25 Nomenclature, objections to use of new, discussed ... 51 of quantitative system, described. 48 tabular statement of. 54 Nomenclatures, old and new, compared. 49 Norite, position of, in new system. 75 Norm, calculation of. 31 correspondence of, with mode. 69 statement of, in tables. 68 North America, division into zones. 64 Novices, analytical work of. 14,20 O. Oxygen-ratio, employment of, in correlation of rock analyses. 12 P. Page number, reference to, explained. 70 Parts, division of tables into, discussed. 43-45 Perfemane, calculation of center points of. 88 tabular statement of center points of. 97 Peridotite, position of, in new system. 75 Persalane, calculation of center points of. 84 tabular statement of center points of. 93 Phonolite, position of, in new system. 74 Phosphoric acid, determination of. 25,26,37,38 errors possible in determination of. 21 Pirsson, L. V., acknowledgments to. 10 cited. 14,21 Poor, definition of, as applied to analyses. 41 Pyroxenite, position of, in new system... 75 Q. Quantitative and qualitative classifications, correla¬ tion of. 72-81 Quartz-diorite, position of, in new system. 74 Quartz-porphyry, position of, in new system. 73 R. Rating of analyses, definition of. 28 method adopted in tables, description of. 38-43 results of... 65 symbols employed in, explained. 39-41 tabular statement of. 41-66 Ratios, molecular, statement of, in tables. 67 Reed, S. A., cited. 18 Reference, statement of, in tables. 70 Remarks, column of, discussed. 71 Rhyolite, position of, in new system. 73 Rock mass, character of. 16 uniformity of. 17 Rocks, distribution of, in quantitative system. 61 Roth, J., cited. 7,12,46 theory of differentiation of, mentioned. 13 S. Second rate, definition of, as applied to analyses. 41 Sedimentary rocks, analyses of, omitted. 8 INDEX TO TEXT 485 Page. (Serpentine, analyses of, omitted. 8 Silica, possible errors in determination of. 21 Smith, Lawrence, method of, for determining alkalies. 22 Specimen, selection of. 16 size of. 18 Stokes, H. N., cited. 21 Strontium, determination of. 25,27 Students, analytical work of. 14,20 Sulphur, correction for. 34 determination of. 26,37 Sulphuric acid, determination of. 26,37 Summation, allowable limits of. 34 errors in analysis indicated by. 68 high, discussed. 35 low, discussed. 34 Superior, definition of, as applied to analyses. 42 Syenite, position of, in new system. 73 T. Teall, J. J. H., cited. 103 Tephrite, position of, in new system. 75 Theralite, position of, in new system. 75 Third rate, definition of, as applied to analyses. 41 Titanium, determination of. 23,25,26,37,38 Trace, definition of. 24 Trachyte, position of, in new system. 73 Tuffs, analyses of, to be found in Part II. 44,45 U. United States Geological Survey, acknowledgments to librarian of.J. 9 Page. United States Geological Survey, analyses published by. 7,27,66 reference to bulletins of, explained. 70 work of chemists of. 20,25,66 Urtite, position of, in system. 75 V. Vanadium, determination of. 26 occurrence of. 25 W. Walcott, C. D., acknowledgments to. 10 Washington, H. S., cited...21,68 Water, determination of. 28,37,67 Williams, J. F., cited. 33 Y. Yale University, acknowledgments to librarian of.... 9 Year of publication, use of. 70 Years included in the collection. 7 Z. Zaleski, S., cited. 19 Zirconium, determination of. 25,37 occurrence of. 25 Zirkel, F., system of, adopted for Part II. 45 INDEX TO NEW ROCK NAMES IN PART I A. Absarokose.. Adamellose. Adirondackare.. Adirondackase. Adirondackiase. Adirondackore. Akerose.. Alaskase. Alaskose. Albanase. Albanose. Almerase.. Almerose. Alsbacbase. Alsbachose. Amadorose. Amiatose. Andase... Andose.. . Argeinose. Arkansose. Atlantare. Austrare. Auvergnase. Auvergnose. Avezaciase. Avezacose. Baltimorase... Baltimoriase.. Baltimorose... Bandase. Bandose. Beemerose Beerbachose .. Belcherose Belgare. Bergenase. Bergeniare.... Bergeniase Bergenose. Bohemare..... Borolanose.... Borsowase .... Borsowose .... Braccianose... Brandbergiase Brandbergose. Britannare.... B. Page. 315 223-225 365 364 364 365 261-265 124-130 127-129 350-352 351 218 219 130-138 137 193 183-185 264-284 273-283 357 307 311 221-251 328- 336 329- 337 364 365 366 366 367 246- 250 247- 251 207 285 355 123-125 364 365 364 365 351-353 297 216 217 305 358 359 143-193 Camptonose... Canadare. Canadase. Caroliniare ... Casselase. Casseliase.. Casselose. Cecilose. Champlainase Champlainiase Champlainore Chotase. Chotose. Ciminose. Coloradase.... Columbare. Cookose. Corsase. Cortlandtase... Cortlandtiase.. Cortlandtose... Covose.. Custerose. Dacase... Dacose Dargase.. Dellenose Dofemane Dosalane. Dunase ... Duniase.. Dunose .. Essexase Essexose Etindase Etindose F. Fergusose. Finnare. Gallare Germanare Gordonase. Grorudose . G. Page. 319-325 193-207 206 367 362 362 363 367 364 364 365 350 351 255 182-192 125-143 355 292 356 356 357 353 357 222-226 225-227 122 157-159 354-364 218-308 368 368 369 296-298 299 348-350 351 293 353 313-339 251-293 220 221 C. Campanare. Camptonase... 486 H. 305-307 Harzose 314-328 Hessase 229-231 286-292 INDEX TO NEW ROCK NAMES IN PART I 487 Page. Hessose. 287-293 Highwoodose. 251 Hispanare. 219-221 Hungarare. 355-357 Hungariare. 355-357 I. Iivaarose. 353 Ijolase. 352 Ijolose. 353 Ilmenose. 251 Indare. 217 Italare. 303-307 J. Janeirose. 303 Judi those. 293-295 K. Kallerudose. 155-157 Kalteniase. 362 Kaltenose. 363 Kamerunare. 347-351 Kamerunase. 346-348 Kamerunose. 349 Kedabekase.1. 336-338 Kentallenose. 317 Kilauase. 312-314 Kilauose. 315 Kyschtymase. 216 L. Labradorase. 204 Labradorose. 205 Lamarose. 313 Lappare. 307 Lassenose. 173-183 Laugenase. 214 Laugenose. 215 Laurdalase. j. 292-296 Laurdalose .... 295-297 Laurvikose. 201-203 Lebachose. 143 Lherzase. 356 Lherziase. 356 Lherzose. 357 Limburgase.:. 342-344 Limburgose. 343-345 Liparase. 142-156 Liparose. 145-153 Lujavrase. 302-304 Lujavrose. 303-305 M. Madupose. 353 Magdeburgose. 125 Malignase. 346 Malignose... 347 Maorare. 367-369 Maoriare. 369 Mariciase. 366 Maricose. 367 Mariposose. 183 Mariupolose. 213 Marquettiase. 360 Marquettose. 361 Marylandiare. 367 Mazarunose. 205 Page. Miaskase. 206-212 Miaskose. 207-213 Mihalose. 131-133 Minnesotase. 354 Minnesotiare. 355 Minnesotiase. 354 Monchiquase. 340-342 Monchiquose. 341-343 Monzonase. 254-264 Monzonose. 255-259 N. Nordmarkase. 192-198 Nordmarkose. 195-197 Norgare. 293-303 Novangose. 157 O. Omeose. 143-145 Orendase. 312 Orendose. 313 Ornose. 327-329 Ourose. 343 P. Pantellerase. 220 Pantellerose. 221 Paolase. 358-360 Paoliare. 359-361 Paoliase. 360 Paolose. 361 Perfemane. 366-368 Persalane. 122-216 Phlegrose. 193-195 Placerose. 245 Portugare. 339-347 Prowersose. 313 Pulaskase. 198-204 Pulaskose. 199-201 Pyreniare. 357 R. Riesenase. 138-142 Riesenose. 139-141 Rockallase. 310 Rockallose. 311 Rossweinose. 357 Russare. 207-215 S. Sagamose. 247 Salemase. 300-302 Salemose. 301 Salfemane. 310-352 Scotare. 359-363 Shonkinose. 341 Shoshonose. 267-271 Siberare. 217 Sitkose. 219 Sverigare. 365 T. Tasmanare. 215 Tehamose. 133-135 Texase. 360-362 Texiare. 361-363 488 INDEX TO NEW ROCK NAMES IN PART I Page. Tonalase. 226-244 Tonalose. 231-246 Toscanase. 156-182 Toscanose.-. 159-173 Tuolumnose. 199 U. Umtekase. 250-252 Unite kose. 253 Uralase. ! . 216 Uralose. 217 Urtase. 306 Urtose. 307 Uvaldiase. 360-362 Uvaldose. 361-363 V. Vaalare. 311 Vaalase. 310 Vaalose. 311 Valbonnaise. 358 Valbonnose. 359 Varingase. 218 Varingose. 219 Page. V enanziase. 356 Venanzose. 357 Vesuvase. 306 Vesuvose. 307 Viezzenase. 212-214 Viezzenose. 213-215 Vuleanose... 143 Vulsinose. 199 Vulturase. 304 Vulturose. 305 W. Websterase. 366 Websteriase. 366 Websterose. 367 Wehrlase. 354-356 Wehrliase. 354 Wehrlose. 355 Westphalose. 131 Wyomingase. 338 Wyomingose. 339 Y. Yellowstonose. 185-193 Yukonose. 139 INDEX TO OLD ROCK NAMES IN DARTS I AND II. A. Page. Absarokite. 313,315,317 Acmite-trachyte.,. 197,209 Adamellite. 191 Aegirite-granite. 167 Aegirite-trachyte. 197,209 Akerite. 159,167,195, 201,257,263; 389 Alaskite. 127,149,165, 177 Albite-diorite.,.. 283 Albite-porphy ri te. 157 Albitophyre. 391 Alboranite. 425 Aleutite. 277 Alnoite. 467 Alsbachite. 137,157 Amygdaloid. 437 Analcite-basalt. 339,341 Anal cite-diabase. 305 Analcite-tinguaite. 207,339 Anamesite. 285; 451,453 Andendiorite .. 263; 411 Andengranite . 179; 375 Andesite. 123,141,149, 151,157,163,169,175,177,183,185,187,189,191,193, 197,201,203,205,225,227,229,231,233,235,237,239, 241,243,245,247,249,251,253,257,261,263,265,267, 269,271,275,277,279,281,283,285,289,301,311,313, 315,317,321,329,353; 419,421,423,425,427,429,431 Andesite-basalt. 285 Andesite tuff. 419,427,429 Anorthite-andesite.421 Anorthosite. 205,207,287; 431 Apatite-syenite. 313 Aplite.-. 127,129, 137,139,141,145,153,157,161,163,165,173,183,219 , 377,379 Aporhyolite. 127,155 Ariegite. 335,337,339,347 Arkite. 307 Augite-peridotite. 359 Augite-syenite. 199,201,203,205,251,271 Augitite. 315,343,345 Average rock. 231,241 Avezacite. 365 B. Banakite. 201,255,257,267 Banatite... 407 Basalt. 241,249,257,263,265,267,269,275,277,279,281, 283,285,289,291,293, 301,303,311,313,315,317,319, 321,323,325,327,329,331,333,335,337,339,341,343, 345,347,351,353,355,361; 447,449,451,453,455,457 Basalt glass. 275,325; 449,451,457 Page. Basalt tuff. 451,453,455 Basaltoid. 455 Basanite. 299,301,303,347; 457 See also Leucite, Nephelite-basanite. Beerbachite. 285,329 Belugite. 289 Beresite. 375 Biotite-ijolite.. 307 “ Biotite-plagiocla.se rock”. 433 Biotite-tinguaite. 197 Boninite.,. 431,469 Borolanite. 297 Bostonite. 145,147,195,197,199,257; 393 C. Camptonite.. 293,301,317,319,321,323,329,335,339,343,345; 417 Camptonite, rock allied to. 245,277 Cancrinite-syenite. 303 Carmeloite .... 299; 419 Charnockite. 125; 381 Ciminite. 255,261; 399 Comendite. 153; 383 Cordierite-andesite. 219; 425,427 Cordierite-norite. 309; 435 Cordierite-vitrophyrite. 427 Corsite. 431 Cortlandtite. 355,357 Corundum-anorthosite. 207 Corundum-pegmatite. 217 Corundum-syenite. 217 Covite. 297 Cumberlandite. 469 D. Dacite .. 123,131,137,153,167,175,177,179,181, 185,187,189,191,193,203,225,227,239,243,245,249; 417,419 Dacite, secretion in. 289; 421 Dacite tuff. 417 Dellenite. x5/,169 Diabase. 205,231,235,245,249, 265,273,275,281,285,287,291,293,311,315,317,319,321,323, 325,327,329,331,333,335,337,343,357; 437,439,441,443,445 Diabase-aphanite. 443,445 Diabase-gabbro. 291 Diabase glass. 327,329 Diabase tuff. 441 “Dike rock”. 219,245 Diorite. 183,187,205,219,223,225,227,229,233,235,239,243, 245,247,249,261,263,267,269,273,275,279,281,283,285,287, 289,291,293,301,303,311,321,327,329,331,333,335; 409,411 489 INDEX TO OLD ROCK NAMES IN PARTS I AND II 490 Page. Diorite-porphyry. 175,18V, 189,205,223,229,233,243,261,271,273,279,299,317; 409,411 Diorite, segregation in. 261 Ditroite. 213 Dolerite.. 265,269,271,281,299,301,321,323,359,363; 449,451,453 Dunite. 369; 471,473 Durbachite. 255 E. Eorhyolite. Epidiabase. Epidiorite. Essexite. Esterellite. Esterellite, inclusion in Euktolite. Eurite. . 181 . 443 . 321,333 271,299,323,335,343; 411,451 . 423,425 . 433 . 357 . 375,385 F. Farrisite. 349 Felsite. 123,135,195,219,245,247; 385,387,419 Felsite-porphyry. 151 Felsite tuff. 385 Felsophyre. 159; 381,395 Fourchite. 333,459 Foyaite. 195,197,207,211,215,253,293,295,343 G. Hornblende-diabase .. Hornblende-gabbro ... Hornblende-peridotite Hornblende-picrite... Hornblendite. Hyperite. Hypersthenite. Hysterobase. Page. . 437 285,287,301,319,329,347; 435,439 . 357 . 333,355 . 345,359 . 435 . 469 . 443 I. Ilmenite-norite Ijolite. Iron ore. . 365 307,347,353; 471 . 365 J. Jacupirangite. 361 K. Kedabekite.. Kentallenite_ Keratophyre.... Keratophyre tuff Kersantite. Kimberlite. Kugel in granite. . 339 . 317 .. 131,145,147,157,181,205,259; 393,395 . 393,395 227,251,259,265,269,271,281,315,317; 411,413 . 473 . 409 Kulaite 299; 459 Kullaite. 441 Kyschtymite. 217 Gabbro. 199,221,223,229,231,247,273,275,277, 279,285,287,289,291,293,301, 303,311,317,319,323,325, 329,331,333,335,337,343,347,355,357; 391,431,433,435 Gabbro, basic schliere in. 369 Gabbrodiabase. 343 Gabbrodiorite. 329,331,337; 431 Gabbro-porphyry. 269,277,319 Gabbro-pyroxenite. 359 Gabbro-syenite. 283 Garnet-norite. 435 Gauteite. 259 Granite. 125,127,129,131,133,135,137,139,141,143,145,147,149, 151,153,155,157,159,161,163,165,167,169,171,173,175, 179,181,183,185,187,189,191, 193, 215,219.221,225,227, 229,231,241,245,249,265,287; 373,375,377,379,381,409 Granite, inclusion in. 227,263 Granite, nodule in. 123; 409 Granite, schliere in. 139,143,231 Granite, segregation in. 261,323 Granitite. See Granite. Granite-porphyry ... 129,139,141,145,153,161,163,167,173,187 Granodiorite. 141,179,183,189,229,235,237; 407 Granophyre. 129,151,155,183; 375 Granulite. 129,293,335 Greisen. 123 Grorudite. 151,155,219,221 H. Halleflinta. Hauyne-phonolite. Hauyne-tephrite. Hauynophyre . Hauynophyre tuff. Hedrumite. Heronite.. Heumite. “ Hornblende-augite rock” Hornblende-basalt. . 143; 381 . 405 . 265;463,465 .... 305,349,351;465,467 . 467 . 253,295 . 207 . 253,299,349 . 471 275,299,301,333,365; 459 L. Labradorite. 433,449 Labradorite-porphyry. 249,269,281; 417 ‘ ‘ Labradorite rock ”. 205,253 Lamprophyre . 249,255,277,313,317,329 Lapilli. 429 Latite. 165,257,269 Laurdalite. 295,297,299 Laurvikite. 203 Lava. 155,251,271,291,301,321; 429,449,465,467 Lestiwarite. 197 Leucite-absarokite. 313 Leucite-banakite. 267 Leucite-basalt. 301,341,347; 465 Leucite-basanite. 305,307,315,341; 461,463,465 Leueite-granite-porphyry. 199 Leucite-phonolite... 207,211,255,321; 405 Leucite-syenite. 293,307,341; 405 Leucite-tephrite.271,283,297,305,315,343; 459,461,463,465 Leucite-tephrite tuff. 461 Leucite-tinguaite.’.. 207,293,295,303 Leucite-trachyte. 199,251,255; 405 Leucitite. 305,307,311,351; 461,463 Leucitite tuff. 463 Leucitophyre. 303,341; 405,461 Leucophyre. 443 Leucotephrite. 461 Lherzolite. 357,367,369 ; 471 Limburgite. 283,337,343,345,347,355; 469 Lindoite. 151 Liparite. 127,133,135,137,139, 143,153,155,167,171,173,179,181,195,221; 385,387 Liparite tuff. 389 Litchfieldite. 195 Lithionite-granite. 129,153,169; 377 Luciite. 285,291 Lujavrite. 253,295,303,305 Lujavrite, schliere in. 339 INDEX TO OLD ROCK NAMES IN PARTS I AND II 491 M. Madupite. Maenaite. Magma-basalt. M agnetite-gabbro. Magnetite-spinellite. Malchite. Malignite. Mariupolitc.. Melaphyre. Melaphyre tuff.. Melilite-basalt. Melilite-monchiquite.. Melilite-pyroxene rock. Metabasalt... Metadiorite. Metarhyolite. Page. . 353 . 393 . 283 . 483 . £69 . 241,329; 425 . 347 . 199,213 ... 271,281,323; 445,447 . 445 351,359,361,363,365; 471 . 467 . 467 . 265,285,331; 451 . 411 . 383 Miaskite. 211; 401 Mica-basalt. 257,333 Mica-diabase. 293 Mica-hornblendite. 359 Mica-peridotite. 363; 469 Mica-tinguaite. 197,295 Mica-trachyte. 255 Microdiorite. 335,411 Microgranite. 131,167; 375,377 M icrotonalite. 411 Minette. 255,263,265; 397 Missourite. 355 Miyakite. 429 Monchiquite. 333,339,341,343,349,351; 459 Mondhaldeite. 271 Monzonite. 223,229,255,259,267,275,277,297,317; 391 Monzonite, gabbroitic facies of. 235 N. Natrolite-phonolite. 405 Nephelinite. 303,305,349,353; 459 Nephelite-basalt. 305,341, 345,349,351,357,359,361,363 ; 457,459 Nephelite-basanite. 301,323,335,343,345,353; 459 Nephelite-felsite. 297 Nephelite-porphyry. 215,297,307; 403,467 Nephelite-syenite. 195,197,199,201,207,211, 213,215,253,263,295,297,305,353,361; 401 Nephelite-syenite-porphyry. 215 Nephelite-syenite, segregation in. 349 Nephelite-tephrite. 283,315,343; 457 Nevadite. 141,149; 383 Nordmarkite. 159,171,195,197,203; 391 Norite. 273,293,309,319,331,337,355,367; 433,435 Nosean-leucite-tephrite. 283 Nosean-sanidinite. 215 O. Obsidian. 127,137,149,151,153,155,157,165, 171,173,175,179,181,195.219,327; 385,387,389,397,399,465 Odinite. 257 Oligoclase rock. 179 Olivine-andesite. 353; 425,431 Olivine-basalt (cf. basalt). 289,329,355; 447 Olivine-diabase. 289,311,325,331,337; 437,439,441,443,445 Olivine-diallage rock. 474 Olivine-gabbro. 285, 287,289,293,325,333,335,343,355,359; 391,433,435 Olivine-laurdalite. 297 Olivine-melaphyre. 445,447 Olivine-monzonite. 317; 391 Page. Olivine-norite. 293,433,435 Olivine-syenite. 325 Olivine-trachyte. 271; 399,401 “ Oolitic rock ” . 465 Ore, titaniferous iron. 365 Orendite. 313 Ornoite. 327 Orthoolase-basalt. 267 Orthoclase-gabbro. 273,319 Orthoclase-gabbro-diorite. 275 Orthofelsite. 135 Orthophyre. 391,393 Ouachitite. 349; 459 P. Paisanite. 145,147,153 Palagonite. 453,457 Pantellerite. 147,219,311 Pegmatite. 125,377 Pele’s hair. 325,337 Peridotite. 355,357,359,361,363,369; 469,471,473 Perlite. 131,163; 387,429 Phonolite. 195, 197,201,203,207,209,211,213,295,297,299,303; 403,405 Phonolite, facies of. 263 Phonolite tuff. 403 Picrite. 333,355,361,363; 471 Picrite porphyry. 471 Pitchstone. 125,127,139,149,173,179; 385,387,389 Plagioclasite. 205 Porphyrite. 161,173,177,187, 189,191,193,197,211,219,221,223,225,227,229,231, 233,237,239,241,243,245,247,251,259,261,263,265, 267,269,275,277,281,285,325,331,335,349; 413,415 Porphyroid. 241 Porphyry. 123,125,131,133,135,139,143,153,159, 169,171,173,175,187,201,229,233,241; 381,383,389,391,393 Porphyry tuff. 381,393 Propylite. 241 Proterobase. 281 Protogine. 203; 377,379 Pseudoleucite-syenite. 293 Pseudodiabase. 327 Pseudodiorite. 357 Pulaskite. 193,195,197,199 Pumice. 137,167,389,401,429 Pyroxenite... .. 355,359,367; 469 Q. Quartz-andesite. 123 Quartz-basalt. 245,249,277,279,321 Quartz-diabase. 245,273,277,279; 437,445 Quartz-diorite. 179,187,191,219, 221, 223,229,231,233,237,239,247,273,283,293,321; 407,409 Quartz-diorite-aplite. 193 Quartz-diorite-porphyry. 163,175,187,189,203 Quartz-felsite. 179,215; 381,385 Quartz-gabbro. 229,285,291 Quartz-keratophyre. 123,131,147,157,161,215,219; 393,395 Quartz-monzonite. 163,165,167 ; 375,391 Quartz-norite. 435 Quartz-orthoclasite. 143 Quartz-pantellerite. 147 Quartz-porphyrite. 157 , 163,169,177,197,181,183,187,191,237,243; 415 Quartz-porphyry. 125 , 127,129,133,139,141,143,145,147,149,151,153,157,159,161, 163, 165, 167,169,171, 173, 181, 197, 223, 245, 251; 381, 383 INDEX TO OLD ROCK NAMES IN PARTS I AND II 492 Page. Quartz-porphyry tuff. 381 Quartz-syenite. 145,147,199,201,223,227; 389 Quartz-syenite-porphyry. 147,151,159,161,181,197,211 Quartz-tourmaline-porphyry. 147 Quartz-trachyte. 181 | R. Rapakiwi granite. 129,151,153; 377 Retinite. 183 Rhomben-porphyry. 203,213,299; 391 Rhyolite. 125, 127,129,131,133,135,137,141,143,145,147, 149,151,155,161, 163, 165,167,169, 173, 175, 177, 181, 219, 223; 383, 385, 387 Rhyolite tuff. 383,385,387 Rockallite. 311 Sanidinite. . 203,215,221; 399 Saxonite. 369; 471,473 Scapolite rock (yentnite). 235 Sehalstein.•... 445 Scy elite. 471 Selagite. 255 Shonkinite. 297,339,341 Shoshonite. 267,269 Soda granite. 147,155,179; 375 Soda minette. 263,297 Soda rhyolite.. 123,157; 385 Soda syenite. 199 Soda trachyte. 397,401 Sodalite-porphyry. 465 Sodalite-syenite. 201,303 Sodalite-tephrite. 465 Solvsbergite. 193,195,197,253 Sperone. 463 Spessartite. 413,443 Spinellite... 369 Sussexite. . 305,307; 467 Syenite. 161,191,193,197,199,201,223,225,231,251,255, 257,259,261,263,265,269,295,297,313,317,325;389,391 Syenite-diorite. 265,301:411 Syenite-pegmatite. 297 Syenite-porphyry. 145, 147,175,193,195,225,241,251,295; 389,393 Syenite, segregation in. 261 T. Rage. Tephrite. 263,271,281; 459 (See also Leucite- and nephelite-tephrite.) Tephrite tuff. 459 Teschenite. 261,303,305,353;457 Theralite. 299,347,349,353:457 Tholeiite. 281; 427 Tinguaite. 197, 207,209,211,213,215,293,295,297,303,339;403,405 Titaniferous iron ore. 365 Tonalite. 139,193,229,243,247,273,283; 407,409 Tonalite-aplite. 139 Tonsbergite.:. 203 Tordrillite. 127 Toscanite. 159,171 Tourmaline-granite. 379 Tourmaline-pegmatite.,_ 125 Tourmaline-porphyry. 147 Trachy(te)-andesite. 181,223,261,297 Trachydolerite. 221,327 Trachyte. 139,153, 157,165,171,183,185,189,195,197,199,201,203,215,225, 231,251,253,255,259,263,271,295,341; 397, 399, 401,423 Trachyte, inclusion in. 299 Trachyte tuff.. 397,399 Trap, white. 441 Tridymite-trachyte.■.. 183 Troctolite. 431,435 U. Umptekite. 251,253,255 Uralite-porphyry. 247,325 Urtite. 307 Variolite.. Venanzite ... Verite. Vogesite. Volcanic dust Vulcanite_ Vulsinite. 283,325; 453,455 .. 357 .. 263 . 317 .. 383,477 . 143 . 199,271 W. Websterite. 367; 469 Wehrlite. 355,357 Weiselbergite. 269 Wyomingite. 313,339 Y. Tachylyte Taurite 327; 423,449,451 . 395 Yentnite Yogoite. 235 255 INDEX TO LOCALITIES IX PARTS I AND II A. Page. Abyssinia. 153,155,173,197,297,317,325 Algeria. 133, 135,153,171,173,185; 379,381,387,409,411,417,419,427,453 Antarctic Continent. 253,325,343; 457 Argentina. 179,191,241,263; 375,397,409,417 Ascension Island. 157 Asia Minor.•. 185,231,245,299; 389,455 Australia: New South Wales ... 153,193,219,245,271; 353,389,401,455 Tasmania. 123 Victoria. 129,145,153,157,173,231,283,293; 469 Austria-Hungary: Bohemia. 125,153,169,201,213,219, 227,259,265,271,283,293,297,299,301,303,315,341,343,345, 347,351; 377,381,395,413,415,431,443,451,459,461,465,469 Bukowina. 157 Carinthia. 171,193,243,323; 381 Galicia. 169; 381,393,447 Herzegovina. 205; 411,431 Hungary.. 131,171,213,221,249,293; 387,391,399,409,425,431 Karnthen. See Carinthia. Mahren. See Moravia. Moravia. 457,471 Steiermark. See Styria. Styria. 141,283; 377,415,459 Tyrol. 191,215, 225,243,259,283,285,323,327,329,335;415,425,443,451,453 Azores. 283,337,401,453 B. Belgium Bolivia . Brazil .. 393,409 417,421 199, 207,211,295,303,311,341,343,361;401,405,407,439,445,461 British Guiana. 127,133, 137,139,141,143,155,179,183,191,193,205,219,221,225, 239, 245, 249,279,281,291,311,321,333,335,337;407,439 Bulgaria. 201; 391 C. Canada; i British Columbia. 301,369 Labrador. 205,285 New Brunswick.. 173,273,303 Ontario.!... 123, 125,137,201,207,219,225,287,347;375,407,409,439 Quebec. 159,185; 373,467 Camerun. See Kamerun. Canary Islands. 173 Cape Colony. 245,311,315,325,337; 445 Cape Verde Islands. 285,337,347,353,359,363 Celebes. 429,465 Chile. 133, 167,219,227,239,249,253,257,263,281,343,369; 391,421 Page. Colombia. 179,191,225,239,263,281; 417,421 Corsica. See France. Costa Rica. 421 D. Deutschland. See Germany. E. Ecuador 123,155,239,281; 385,417,421,445 F. Ferdinandea Island (Mediterranean Sea). 283 France. 129,135,151, 157,167,203,249,269,287,291, 309,335,337,339,347, 355,357,359, 369; 375,377,379,381,383,389,391,397, 403,411,413,423, 425, 431,435,441, 449, 461,465, 471 Corsica. 377,381,433,443 Franz Josef Land.. 335; 453 G. Galapagos Islands. 421 Germany: Alsace... 269,281,397,413,449,469 Baden. 123,125, 129,133,151,153,155,159,169,203,211,213,223, 227,255,259,271,281; 297,339,341,345,349,351, 359,361,363,365; 405,409, 425,451,457, 459, 469 Bavaria. 169,251,271,361,363; 377,417 Elsass. See Alsace. Harz Mountains. 153,169,225,227, 229.243,251,265,271,281,283,363; 393,409,443,445,471 Hegau.. 203,211,213,297,359,361,365 Hesse. 129, 135,137,139,145,181,221,241,265,281,285, 291,301,303,315,323, 335,341,345,347,351, 353,359,361; 377, 399,413,433, 441,451, 459 Hesse-Nassau. 323,327,345,355,363; 449 Palatinate. 263,281, 323 Pfalz. See Palatinate. Prussia. 143,145,153,221', 223, 225,243,253,323,345;377,387,393,413,443 Rhenish Prussia. 169, 181,197,203,207,211,215,223,227,229, 241,259,263,269,281,285,301,327,341; 393,397,403,405, 413,443,445,449, 451 Rheinland. See Rhenish Prussia. Rhongebi rge. 263,291,299, 305,323,345,347,351,357,359,397,403,451,459 Saxony. 125,153, 181,191,219,221,247,251,265,303,349, 357,359,363; 387, 389, 391,413, 431,459 Schlesien. See Silesia. Silesia. 135,137,139,141,143,169,181,223, 225,231,243,249,259,265,283; 461,475 493 494 INDEX TO LOCALITIES IN PARTS I AND II Germany—Continued. Page. Thiiringerwald. 143,161,153,197,259,271; 447 Thuringia.. 203,251,259; 315,413,443 Vogesen. 269,281; 413,449 Westphalia. 123,131,215,335,363; 381,393,395 Wurttemberg. 471 Goughs Island. 195 Great Britain: Cornwall. 125,127,143; 431,449 England. 123,155,19f, 241,249,269,291,321,363; 375,423,439,441,449 Ireland. 123,157,167; 375,385,397,449 Isle of Man. 131 Orkney Islands. 257,335,343,345,351; 467 Scotland. 135, 211,215,227,229,241,291,297,317, 321,329,355,359,369; 375,381,385,387,423,431,441,449,471 Wales. 135.179,355; 375,385,423 Greece. 139, 141,185,191,193,227,243,245,249,283,285,315,335; 427,435 Greenland. 295,303,339 Griqualand. 337; 445,453,473 H. Hawaii. 265,283,285,301,315,325,329,337; 455,457 I. Oesterreich. See Austria-Hungary. Orange River Colony. 311,337; 431 P. Pantelleria. 203,219,221,311 Pantelleria (island of 1891 near)... 343 Patggonia. 227,249,253,369 Persia. 125,341; 427,429,443,445,447,455 Peru. 191,263 Portugal. 207,211,213,281,295,303,349;403,411,457 R. Rockall Island. 311 Russia. 129,199,205, 213,243,265,283,293,315,317,325,335,339; 415,431,443,453 Caucasus Mountains. 181,193,243,283; 411,415,417,427,443 Crimea. 131, 137,139,153,157,171,181; 395,407,409,415,427,447 Finland. 135, 145,153,157,169,197,211,215,227,241,247,253,285,305, 307,313,325,335,349,369; 377,391,409,411, 413,441,467 Transcaucasia. 265; 379 Ural Mountains. 211,217,293,335,361; 411,431,473 Iceland. 127,151,155,167,195; 385,449 India. 125,247,355; 381,411,429,435,469 Italy. 123,125,133,135,139,141,143,159,171,181,185,195, 199,201,207,225,231,243,247,251,255,259,271,283.285,293, 297,301,305,307,315,329,335,347,351,355,367; 379,383,387, 399,401,405,407,411,415, 425,443,447,453,461,463,465,467 iEolian Islands.... 123,135, 143,153,171,181,227,243,247,249,317,325; 387,425,427,453 Capraia. 243,283,285 Lipari Islands. See TEolian Islands. Ponza Islands. 183 Sardinia. 153; 383,387,401 Sicily. 453 J. S. St. Paul’s Rocks_ Servia . Siberia. Somaliland. South Pacific Ocean . 473 . 383,401 173,211,217; 401,445,455 . 173 . 457 Spain ... 133,143,179,203,211,219,249,263,269,299; 417,425,449 Spitsbergen. 321; 421,423 Sumatra. 173,181,203,247,297 Sweden. 129,131,143,151,155,157,167,169,181,185,223,241, 297,303,317,323,327,335,347; 377,407,409,431,441,459,467 Switzerland. 123,131,135,153,171,193,283,335; 431,453 Mont Blanc. See France. T, Jan Mayen Island. 447 Japan. 141,245,247,251; 429,445,469 Java. 429 K. Thibet. 225 Timor Island. 325,343 Transvaal. 297,367 Tristan d’Acunha. 427,455 Kamerun. Kamchatka. Kerguelen Island. Kleinasien. See Asia Minor. Krakatoa. M. 307,349,351,353 ... 131,181; 389 .. 405 .193; 429 Mexico. 137,151,155,185, 189,191,211,235,239,245,279,303,315,333,341; 421,439,461 Mytilene Island. 245 N. Natal .. 445 New Britain. 251; 429 New Hebrides. 271; 429 New Zealand.... 129,137,183,227,265,301,369; 401,405,429,431 Nicaragua. 137 Norway. 129, 143,151,155,167,179,191,195,197,201,203,205,211,213,215, 219,221,229,253,257,263,269,281,295,297,299,301,323,335, 343, 345, 349, 359, 365; 389, 391, 407, 413, 417, 435, 441, 445 Nova Zembla. 445 U. Ungarn. See Austria-Hungary. United States: Alaska. 127, 139,149,165,199,219,225,235,245,249,269,277,289; 409 Arizona. 225,257,321,333 Arkansas. 105,197,199,201,207,209,213, 215,293,295,297,307,333,349,353,361,363; 389,403,405,459 California. 123, 125,127,131,133,137,139,143,151,157,165,167,179,183,185, 189,193,199,219,225,229,235,237,239,245,249,251,257,269, 277,279,285,289,291,293,299,303,305,311,321,327,333,337, 357,367; 375,385,407,417,419,431,435,439,445,447,459,471 Colorado.... 125,127,137,139, 143,149,155,163,165,175,183, 187,189,195,201,205,209,223,233,235,249,257,261,269,277, 289,295,301,313,317,321,341,357; 381,383,385,403,447,457 Connecticut. 147,159,205,317,319,329,335; 373,447 Delaware. 373 District of Columbia. 247,311; 373 Georgia. 161,221,229; 471 Idaho. 163,175,187,273,319; 375,383,397,409 Kentucky. 255,363 ; 469,471 INDEX TO LOCALITIES IN PARTS I AND II 495 United States—Continued. Page. Maine. 127,145,157, 195,207,231,261,285,301,327,329,359; 373,413,419,435,437 Maryland..'.. 133,137,141,147 159,185,227,231,247,287,293,331,337,355,357,367; 431,469 Massachusetts. 145,147,159,173,193,195,197, 207,251,253,273, 287,299,301,319,329,355; 373,381,407,437 Michigan. 125,147, 161,265,267,285,287,319,331,333,357,361; 431,439,447,471 Minnesota. 147,161,173,193,205,223,229,231, 245,247,273,285,287,289,309,319,333,355; 419,431,435,471 Missouri. 147,161; 375 Montana_ 127,133,147,149,155,161,163,173,175,183,197, 199,201,205,209,223,225,229,233,247,251,253,255,261,267, 273,293,295,297,299,303,313,315,317,329,333,339,341,343, 347,349,351,353,355,359; 375,383,389,397,413,457,469,471 Nevada. 131, 167,183,189,229,239,279,291,321; 375,385,409,419 New Hampshire. 159,199,207,253,319; 373,417 New Jersey. 207; 213,231,307,319,331,339,397,401,437,459,467 New Mexico .... 149,155,197,235,277,321,333,343; 397,419 New York. 147,199,223; 273, 287,295,319,331,359,365; 373,389,393,417,431,437,467,469 United States—Continued. Page. North Carolina. 125,127,223,311,331,367,369 ; 437 Oregon. 235,277,285,327,369; 1 17 Pennsylvania. 127,131,155,301,315 Rhode Island. 159; 373,397,469 South Dakota. 197,201,209,213; 403 Tennessee. 319 Texas. 147,221,295,299,303,343,361,363; 389,407 Utah. 149,165,201,229,233: 391 Vermont. 145, 159,185,193,199,255,261,273,287,319,329; 373, 393,417,459 Virginia. 161,313,331; 375,437 Washington. 235,289,311: 421 Wisconsin. 127,137,141,161,205,219,331; 375,383,393 Wyoming. 175,257,313,321,339,353 Yellowstone National Park. 127,131, 133,137,149,163.175,183,187,197,201,223,225,233,255,257, 261,267,269,273,275,289,313,315,317,319,321,333; 383,397 West Indies: Aruba Island. 191 Grenada. 239, 265,353,355 Old Providence Island. 239 St. Thoma^. 421,451 o PUBLICATIONS OF UNITED STATES GEOLOGICAL SURVEY. [Professional Paper No. 14.] The serial publications of the United States Geological Survey consist of (1) Annual Reports, (2) Monographs, (3) Professional Papers, (4) Bulletins, (5) Mineral Resources, (6) Water-Supply and Irrigation Papers, (7) Topographic Atlas of the United States—folios and separate sheets thereof, (8) Geologic Atlas of the United States—folios thereof. The classes numbered 2, 7, and 8 are sold at cost of publication; the others are distributed free. A circular giving complete lists may be had on application. The Bulletins, Professional Papers, and Water-Supply Papers treat of a variety of subjects, and the total number issued is large. They have therefore been classified into the following series: A, Economic geology; B, Descriptive geology; C, Systematic geology and paleontology; D, Petrography and mineralogy; E, Chemistry and physics; F, Geography; G, Miscellaneous; H, Forestry; I, Irriga¬ tion; J, Water storage; K, Pumping water; L, Quality of water; M, General hydrographic investiga¬ tions; N, Water power; 0, Underground waters; P, Hydrographic progress reports. This paper is the twenty-third in Series D and the thirty-seventh in Series E, the complete lists of which follow. (B=Bulletin, PP=Professional Paper, WS=Water-Supply Paper.) SERIES D, PETROGRAPHY AND MINERALOGY. B 1. On hypersthene-andesite and on triclinic pyroxene in augitic rocks, by Whitman Cross, with a geological sketch of Buffalo Peaks, Coloiado, by S. F. Emmons. 1883. 42 pp.,2 pis. B 8. On secondary enlargements of mineral fragments in certain rocks, by R. D. Irving and C. R. Van Hise. 1884. 56 pp., 6 pis. (Out of stock.) B 12. A crystallographic study of the thinolite of Lake Lahontan, by E. S. Dana. 1884 . 34 pp., 3 pis. B 17. On the development of crystallization in the igneous rocks of Washoe, Nevada, with notes on the geology of the district, by Arnold Hague and J. P. Iddings. 1885. 44 pp. B 20. Contributions to the mineralogy of the Rocky Mountains, by Whitman Cross and W. F. Hillebrand. 1885. 114 pp. 1 pi. (Out of stock.) B 28. The gabbros and associated hornblende rocks occurring in the neighborhood of Baltimore, Maryland, by G H. Williams. 1886. 78 pp., 4 pis. (Out of stock.) B 38. Peridotite of Elliott County, Kentucky, by J. S. Diller. 1887. 31 pp., 1 pi. B 59. The gabbros and associated rocks in Delaware, by F. D. Chester. 1890. 45 pp., 1 pi. B 61. Contributions to the mineralogy of the Pacific coast, by W. H. Melville and Waldemar Lindgren. 1890. 40 pp., 3 pis. B 62. The greenstone-schist areas of the Menominee and Marquette regions of Michigan; a contribution to the subject of dynamic metamorphism in eruptive rocks, by G. H. Williams; with introduction by R. D. Irving. 1890. 241 pp., 16 pis. (Out of stock.) B 66. On a group of volcanic rocks from the Tewan Mountains, New Mexico, and on the occurrence of primary quartz in certain basalts, by J. P. Iddings. 1890. 34 pp. B 74. The minerals of North Carolina, by F. A. Genth. 1891. 119 pp. (Out of stock.) B 79. A late volcanic eruption in northern California and its peculiar lava, by J. S. Diller. 1891. 33 pp., 17 pis. (Out of stock.) B 89. Some lava flows of the western slope of the Sierra Nevada, California, by F. L. Ransome. 1898. 74 pp., 11 pis. B 107. The trap dikes of the Lake Champlain region, by J. F. Kemp and V. F. Masters. 1893. 62 pp., 4 pis. B 109. The eruptive and sedimentary rocks on Pigeon Point, Minnesota, and their contact phenomena, by W. S. Bayley. 1893. 121 pp., 16 pis. B 126. A mineralogical lexicon of Franklin, Hampshire, and Hampden counties, Massachusetts, by B. K. Emerson. 1895. 180 pp., 1 pi. B 136. Volcanic rocks of South Mountain, Pennsylvania, by Florence Bascom. 1896. 124 pp., 28 pis. B 150. The educational series of rock specimens collected and distributed by the United States Geological Survey, by J. S. Diller. 1898. 400 pp., 47 pis. B 157. The gneisses, gabbro-schists, and associated rocks of southwestern Minnesota, by C. W. Hall. 1899. 160 pp.. 27 pis. PP 3. Geology and petrography of Crater Lake National Park, by J. |>. Diller and H. B. Patton. 1902. 167 pp., 19 pis. B 209. The geology of Ascutney Mountain, Vermont, by R. A. Daly. 1903. 122 pp., 7 pis. PP 14. Chemical analyses of igneous rocks published from 1884 to 1900, with a critical discussion of the character and use of analyses, by H. S. Washington. 1903. 495 pp. 14128 — No. 14—03 - 32 i II PUBLICATIONS OF UNITED STATES GEOLOGICAL SURVEY. SERIES E, CHEMISTRY AND PHYSICS. B 9. Report of work done in the Washington laboratory during the fiscal year 1883-84, by F. W. Clarke and T. M. Chatard. 1884. 40 pp. B 14. Electrical and magnetic properties of the iron carburets, by Carl Barus and Vincent Strouhal. 1885. 238 pp. B 27. Report of work done in the Division of Chemistry and Physics, mainly during the year 1884-85. 1886. 80 pp. B 32. Lists and analyses of the mineral springs of theUnited States (a preliminary study), by Albert C. Peale. 1886. 235 pp. B 35. Physical properties of the iron carburets, by Carl Barus and Vincent Strouhal. 1886. 62 pp. B 36. Subsidence of fine solid particles in liquids, by Carl Barus. 1886. 58 pp. B 42. Report of work done in the Division of Chemistry and Physics, mainly during the fiscal year 1885-86, by F. W. Clarke. 1887. 152 pp., 1 pi. B 47. Analyses of waters of the Yellowstone National Park, with an account of the methods of analyses employed, by Frank Austin Gooch and James Edward Whitfield. 1888. 84 pp. B 52. Subaerial decay of rocks and origin of the red color of certain formations, by Israel Cook Russell. 1889. 65 pp., 5 pis. B 54. On the thermoelectric measurement of high temperatures, by Carl Barus. 1889. 313 pp., 11 pis. B 55. Reportof work done in the Division of Chemistry and Physics, mainly during the fiscal year 1886-87, by F. W. Clarke. 1889. 96 pp. B 60. Report of work done in the Division of Chemistry and Physics, mainly during the fiscal year 1887-88. 1890. 174 pp. B 64. Report of work done in the Division of Chemistry and Physics, mainly during the fiscal year 1888-89, by F. W. Clarke. 1890. 60 pp. B 68. Earthquakes in California in 1889, by James Edward Keeler. 1890. 25 pp. B 73. The viscosity of solids, by Carl Barus. 1891. xii, 139 pp., 6 pis. B 78. Report of work done in the Division of Chemistry and Physics, mainly during the fiscal year 1889-90, by F. W. Clarke. 1891. 131 pp. B 90. Report of work done in the Division of Chemistry and Physics, mainly during the fiscal year 1890-91, by F. W. Clarke. 1892. 77 pp. B 92. The compressibility of liquids, by Carl Barus. 1892. 96 pp., 29 pis. B 94. The mechanism of solid viscosity, by Carl Barus. 1892. 138 pp. B 95. Earthquakes in California in 1890 and 1891, by Edward Singleton Holden. 1892. 31 pp. B 96. The volume thermodynamics of liquids, by Carl Barus. 1892. 100 pp. B 103. High temperature work in igneous fusion and ebullition, chiefly in relation to pressure, by Carl Barus. 1893. 57 pp., 9 pis. B 112. Earthquakes in California in 1892, by Charles D. Perrine. 1893. 57 pp. B 113. Report of work done in the Division of Chemistry and Physics during the fiscal years 1891-92 and 1892-93, by F. W. Clarke. 1893. 115 pp. B 114. Earthquakes in California in 1893, by Charles D. Perrine. 1894. 23 pp. B 125. The constitution of the silicates, by F. W. Clarke. 1895. 100 pp. B 129. Earthquakes in California in 1894, by Charles D. Perrine. 1895. 25 pp. B 147. Earthquakes in California in 1895, by Charles D. Perrine. 1896. 23 pp. B 148. Analyses of rocks, with a chapter on analytical methods, laboratory of the United States Geological Survey, 1880 to 1896, by F. W. Clarke and W. F. Hillebrand. 1897. 306 pp. B 155. Earthquakes in California in 1896 and 1897, by Charles D. Perrine. 1898. 47 pp. B 161. Earthquakes in California in 1898, by Charles D. Perrine. 1899. 31 pp., 1 pi. B 167. Contributions to chemistry and mineralogy from the laboratory of the United States Geological Survey; Frank W. Clarke, Chief Chemist. 1900. 166 pp. B 168. Analyses of rocks, laboratory of the United States Geological Survey, 1880 to 1899, tabulated by F. W. Clarke. 1900. 308 pp. B 176. Some principles and methods of rock analysis, by W. F. Hillebrand. 1900. 114 pp. B 186. On pyrite and marcasite, by H. N. Stokes. 1900. 50 pp. B 207. The action of ammonium chloride upon silicates, by F. W. Clarke and George Steiger. 1902. 57 pp. PP 14. Chemical analyses of igneous rocks published from 1884 to 1900, with a critical discussion of the character and use of analyses, by H. S. Washington. 1903. 495 pp. Correspondence should be addressed to— The Director, United States Geological Survey, Washington, D. C. June, 1903. LIBRARY CATALOGUE SLIPS. [Mount each slip upon a separate card, placing the subject at the top of the second slip. The name of the series should not be repeated on the series card, but additional numbers should be added, as received, to the first entry.] Washington, Henry Stephens. . . . Chemical analyses of igneous rocks published from 1884 to 1900, with a critical discussion of the char¬ acter and use of analyses; by Henry Stephens Washing¬ ton. Washington, Gov’t print, off., 1903. 495, iii p. 295x23°“. (U. S. Geological survey, no. 14.) Subject series- D, Petrography and mineralogy, 23. E, Chemistry and physics, 37. Professional paper Washington, Henry Stephens. . . . Chemical analyses of igneous rocks published from 1884 to 1900, with a critical discussion of the char¬ acter and use of analyses; by Henry Stephens Washing¬ ton. Washington, Gov’t print, off., 1903. 495, iii p. 295x23°“. (U. S. Geological survey, no. 14.) Subject series- D, Petrography and mineralogy, 23. E, Chemistry and physics, 37. Professional paper U. S. Geological survey. Professional papers. no. 14. Washington, H. S. Chemical analyses of igne¬ ous rocks published from 1884 to 1900, with a critical discussion of the character and use of analyses. 1903. U. S. Dept, of the Interior. see also U. S. Geological survey. hi ■ ' r. ■ . ■ -1 ■ . ■ ' ■ « . I AHl £ # i?i^fetiaP yiy f Ayryp Y^vATAMli F*¥fflSS W/wiMr In^irrrfTui Mi r-s^^Nl R - s* 5 *'- gjg 1 i 1 -s