MH ISBUI w rffi Bo En nM I HI Ma] URBANA STATE OF ILLINOIS DEPARTMENT OF REGISTRATION AND EDUCATION A. M. SHELTON, Director DIVISION OF THE STATE GEOLOGICAL SURVEY M. M. LEIGHTON, Chief REPORT OF INVESTIGATIONS— NO. 1 FURTHER CONSIDERATION OF PROSPECTS FOR OIL IN THE DECATUR AREA BY D. M. COLLINGWOOD "^^^ PRINTED BY AUTHORITY OF THE STATE OF ILLINOIS URBANA, ILLINOIS 1924 Illinois State Journal. Co. Springfield, Illinois 19 2 4 19527 — 1500 957 /zj. /-=2 3 FURTHER CONSIDERATION OF PROSPECTS FOR OIL IN THE DECATUR AREA By D. M. Collingwood OUTLINE PAGE Introduction 5 Purpose of report 5 Data on which study is based 5 General Geology 5 Geologic section 5 Regional structure 6 Local structural closures 6 Stratigraphy 8 Possible petroliferous horizons 9 Importance of sampling formations and waters 11 Character of oil 11 Detailed structural considerations and recommendations for future prospecting 12 Introduction 12 Areas of possible local doming 12 Decatur area 13 General description 13 Recommendations for future drilling 14 Other possible areas of local doming 14 Conclusions 15 Appendix, representative logo 16 Christian County 16 Macon County 24 Moultrie County 41 Piatt County 43 Sangamon County 44 ILLUSTRATIONS PLATE I. Structure map of Decatur and vicinity showing contours on No. 5 coal based on sea level datum, with superimposed convergence ( isochore lines 9 FIGURE 1. Cross section in the Decatur area to show local disconformable irregularities at the top and bottom of the Chester series and of the Sweetland Creek shale 7 Digitized by the Internet Archive in 2012 with funding from University of Illinois Urbana-Champaign http://archive.org/details/furtherconsidera5571coll INTRODUCTION PURrOSE of Eeport A pamphlet entitled "Notes on Prospects in the Decatur Area" was published by the Illinois Geological Survey in March, 1922. Since that time, some additional drilling has been done in the area and accurate curb elevations of the tests for which there are records avail- able have been obtained. These data now afford a somewhat more satis- factory basis on which to formulate correlations and interpret the local structure. Attention is called to the accommpanying map (PL I) showing the suggested irregularities of the local structure which will indicate in advance of further drilling the locations of greater promise, so that any further exploratory drilling can be undertaken to test the existence of complete closure in the shallow horizons before undertaking the deep tests. Data ox Which Study Is Based Copies of representative logs available for this area, including those published in the previously mentioned Press Bulletin, are grouped by counties in the appendix. On the map, Plate I, those borings for which records are included are shown by certain symbols accompanied by numbers designating corresponding logs in the appendix. Levels were run from points of known elevation on the railroads and from United States Geological Survey bench marks to obtain curb elevations of the drill holes. GENERAL GEOLOGY Geologic Section For the convenience of the reader, the following generalized sec- tion of strata penetrated in the Decatur area is given. As shown in the section, the horizon that has given good shows of oil is encountered about 20 to 40 feet below the top of the Silurian ("Niagaran") lime- stone at a total depth of about 2000 feet. OIL I.\ THE DECATUR AEEA Thickness Feet .870 Pleistocene system Loess and drift Pennsylvanian system McLeansboro i Carbondale V "Coal Measures" Pottsville ? \ Mississippian system Upper Mississippian sub-system Chester series 225 Lower Mississippian sub-system (upper part — "Big Lime") Spergen \ Osage [ 725 Kinderhook ) Sweetland Creek (chocolate shale) 165 Devonian system ? Silurian system (oil in upper part) Niagaran / Alexandrian \ Ordovician system Maquoketa 185 Trenton 300 + .400 Depth Feet 870 1095 1820 1985 f 2385 2570 2870 + Regional Structure All of the formations with the exception of the Pennsylvanian and upper Mississippian rocks have nearly constant thickness in the holes that have gone to the Silurian in the immediate area. The Pennsyl- vanian rocks and to a lesser degree, the upper Mississippian strata, thicken basinward below the surface deposits, progressively towards the south and east, the direction of the regional dip. In general, the dip of the shallow rocks in Illinois parallels that of the deeper ones, but in this area, due to pre-Chester deformation and the thickening and increase in number of formations to the south and east, the Pennsylvanian and Chester have somewhat less dip than the under- lying rocks. Local disconformable irregularities masking the expression of true dip occur at the top and bottom of the Chester series as shown in figure 1. The same sort of situation holds true, although to a h degree, for the top and bottom of the Sweetland Creek shale. In the immediate vicinity of Decatur, the Chester seems to thicken slightly also towards the northeast ahum- the regional strike of the rocks. Local Structural Closures Where local flexures are imposed on non-parallel strata conforming with the general basinward dip, the flexure of the folds may he sufficient to show some reversal or closure in the upper beds, while the lower ones may lack sufficient curvature to show anything more than a flattening of the regional dip. Furthermore, where the folding is sufficient to OIL IN THE DECATUR AKEA 500- 600 700- 800" 900 1000- 1100 1200- 1300 1400 Shale Limestone Sand ,<** C V^ J i | wzmmm Red rock "-5J Cte e« 19 ■ p — i = Figure 1. Cross section in the Decatur area to show local irregularities in contact surfaces between disconiormable beds at the top and bottom of the Chester series and of the Sweetland Creek shale. No. 3. Lincoln Oil and Gas Co., well No. 3, SE. %, SE. %, sec. 32, T. 17 N., R. 2 E. No. 6. Lincoln Oil and Gas Co., well No. 2, SW. *4, NE. %, sec. 5, T. 16 N, R. 2 E. No. 5. Lincoln Oil and Gas Co., well No. 1, SE. 14, NE. 14, sec. 5,. T. 16 N., R. 2 E. No. 8. Atlantic Oil and Gas Co., Bledsoe farm, No. 1, SW. %, SE. %, sec. 5, T. 16 N., R. 2 E. No. 19. Mt. Auburn Oil and Gas Co., well No. 2, NW. 14, NW. %, sec. 25, T. 15 N., R. 2 W. Oil, IN THE DECAl'Ult AREA provide complete reversal in the dip of the lower beds, the cresl of the doming will probably not he found directly below that of the upper beds, but slightly offset in the direction up the regional dip. These point- should he remembered iii lest drilling to considerable depth, a structural dome or anticline which has been revealed by cor- relating shallow horizons. In the absence of sufficient record- of deep drilling, structure contours drawn on a shallow key horizon are helpful in locating tests on favorable deep structures, although the latter may he modified in degree and position. Stbatigbapht. Few borings in the area bave gone deeper than the Pennsylvanian system. The Pennsylvanian rocks directly underlying the glacial drift extend to a depth of about 900 or 1000 feet. In the absence of cores and thorough sampling, the most belpfu] guides in correlating logs of shallow test borings are the limestones, the coal beds and local red and black shales. The chief coal beds in their order of penetration, are NoS. 7, (>. and •">, which occur with vertical intervals of 25 to 150 feet and at a depth between 350 and 1050 feet, depending on location and surface elevation. Log No. 23 in sec. 1, T. 11 X., El. '2 W., listed in the ap- pendix is a typical record of the coal tests in northern Christian County, and shows all three coals with the addition of a local coal between Xo. (i and Xo. 5. Limestone cap rocks are locally associated with the Xo. ^ and No. 5 coals, hul the most important and persistent limestone member associated with the coal seams is the fossiliferous limestone cap of Xo. (i coal. There are two other main Pennsylvanian limestone horizons en- countered. The one at 150 to '.'.Mi feet above No. 5 coal is associated with and often replaced by a thin bony coal formation, which is a good horizon marker, and another, probably the Carlinville and Shoal Creek limestone horizon is found at 250 to iOO feet above Xo. 5 coal. The Carlinville and Shoal Creek limestone horizon which generally com- prises several beds separated by shale, is ,ery persistent hut is not such a good index of structure as either No. 5 or No. (i coal because of its shallower position in the rock section and because generally some beds are unrecognized and therefore not accurately logged In drillers. Toward the south and east of the area mapped, another persistent limestone, probably equivalent to the Carthage or New Haven, is found about 250 feet above the Carlinville. Red shales lying between 30 and 70 feet above No. ii coal in the Christian County area and about 50 to 100 above No. (i coal in the Decatur area are also helpful locally in correlat- ing drilling records. ILLINOIS STATE GEOLOGICAL SURVEY REPORT OF INVESTIGATIONS NO. 1. PLATE NO. 1 R.2 E. LEGEND -^- Churn drill dry hole "\ Isochore or convergent N Structure contours on Jfo.< r > coal _ _, . „ , . ., . lines joining point) of • Churn drill show of oil ^ eq aaL Meroal between © Diamond drill (.oalUst \ Ho 5 and Jfo.6 coals ■ Coal shaft /0fo Promising area for exploration R.3W. R.2W. R.1E. Structure map of Decatur and vicinity showing contours on No. 5 coal, with reference to aea level, with superimposed convergence (isochore) lines. Areas which are cross hatched show favorable structural areas for further exploration. OIL IX THE DECATUU AREA !) In the north part of Christian County, No. 6 coal is mined and can be traced easily towards Macon County by comparing a number of coal test records most of which note No. I and No. 6 coals, some of which are deep enough to show the local coal immediately below No. 6 and a few of which penetrate No. 5 coal. Then there is an area between the south line of Macon County and the city of Decatur in which records of the coals are scarce. In this area No. (J coal is probably considerably thinner and may be absent. In the Decatur area a coal which has been called No. 51 coal, the equivalent of the coal mined in the Springfield and Peoria regions, has been mined for a number of years. This coal is present east and south- east of Decatur, but is not recorded in the oil tests west and northwest of the city, with the exception of the boring in sec. 8, T. l(i N., B. 2 E. (Eecord No. 9, Macon County) in which two feet of coal believed to be No. 5 was reported. In Christian County, notably in Tps. 13 and 1-1 N. and Rs. 1 and 2 W., a coal is found locally about 25 or 30 feet below No. 6. This has formerly been correlated as No. 5, and is probably the same coal that is mined at Moweaqua. 1 In the surrounding area, the interval between No. 6 and No. 5 appears to have a very definite relation to the regional structure. It is about 60 feet at Decatur and southwestward, at right angles to the direction of the dip of the rocks. The interval decreases up the dip towards Sangamon County, and increases basinward towards Moultrie and Shelby counties. Thus, the interval between No. C and No. 5 coals at Mechanicsburg is about 30 feet, and at Assumption it is about 130 feet. Isochore or convergence lines joining points of equal interval between No. 6 and No. 5 coal are shown on 1 Plate I. From an examination of these isochore lines it is evident that a coal occurring only 25 to 30 feet below No. 6 in Tps. 13 and 14 N., Rs. 1 and 2 W. is probably not the true No. 5 coal, but must be an extra coal bed of local development. POSSIBLE PETEOLIFEEOUS HORIZONS Commercial quantities of oil and gas might be found in the shallower sands of the Pennsylvanian and Upper Mississippian (Chester) strata, should there be any distinct local doming, but the drilling of the numerous coal tests and other holes shown on the map has failed to show any oil in these shallower formations. 1 Kay. Fred H., Coal resources of District VII, 111. Mining Investigations Bull. 11, pp. 205, 215, 1915. 10 OIL IX THE DECATUE Ai;i:\ Below the Chester beds, the next possible oil horizons are a and below the dark chocolate Sweetland Creek shale at the base of the Mississippian. Xu oil has yet been discovered above the shale in this area, although the Carper sand recently found productive at this horizon in the Martinsville held of Clark County. Illinois, may be present Ideally. A very fine grained sandstone, which might be called a siltstone, lies about LOO to •">**<> feet above the top of the Sweetland Creels -hale. Sand grains are also round in lesser amounts in the samples from the formation about 50 to 150 feet above the Sweetland Creek shah'. Indications of oi] accumulation in this area have been obtained from the upper portion of the Silurian limestone which lies directly below the Sweetland Creek shale, and is commonly referred to as the "Niagara". Where the upper 20 feet of this formation has been pene- trated in the Decatur area, it is a dense, white, hard, cherty limestone interbedded with some cream colored dolomitic strata. Considerable amounts of white to blue, translucent chert appear to he distributed irregularly through the dolomitic limestone \h-i\< as well as being inter bedded with them. This upper portion of the dense white limestone has not proved oil bearing, but immediately below it, the limestone becomes more dolomitic and softer, although a large amount of chert is -till present. Twenty-five feet of this formation showed oil in the No. i well of the Lincoln Oil and (las Company (Record No. 5, Macon County). At a depth of approximately (id Feet in the limestone, the hull' dolomitic beds give place to more uniform, gray dolomitic limestone with less chert in which oil shows have not been obtained. The Lincoln Oil and Gas Company No. 2 well (Record No. (i, Macon County) was drilled considerably deeper hut no oil was found in the Silurian and only a trace reported in the upper portion of the Trenton. In the No. ."> well of the Lincoln Oil and Gas Company (Record No. :!, Macon County) oil showed at depths of 2 1 feet and :'>:! feet below the top of the Silurian limestone. The oil is contained apparently in the hull', slightly porous, dolomitic beds between 20 and (in feet helow the base id' the Sweetland Creek shale. Dolomitic limestone is commonly porous due to the shrinkage in size id' crystals resulting from the chemical replace- ment of calcium carbonate by the more dense magnesium carbonate. The large amount of chert present as irregular masses, stringers and beds retards drilling. The chert has probably filled some of the intercrystalline interstices that result from dolomitization. Before the deposition of the overlying Sweetland Creek shah', the Silurian dolomi- ti/eil limestone was subjected to erosion. During this time it is prob- able that solution cavities, some of them quite large, were formed by OIL IN THE DECATUB AREA 11 percolating surface water. At the same time, possibly at slightly greater depth, some deposition from solution might have occurred, due to the mixing of waters or other causes, resulting in further cementation or tilling of the small pore spaces caused by dolomitization. In well Xo. 3 of Lincoln Oil and Gas Company a cavity containing no gas. oil, or water, and into which drilling water and cuttings dis- appeared was encountered at 2005 feet. Later, when the shot was being tamped, considerable water had to he run in to till the cavity hefore the water lose in the hole. The existence of this cavity containing neither gas nor fluid seems to indicate a lack of continuity of the pores in this limestone. This is further borne out by the occurrence of oil and some water under slight pressure in the Xo. 1 well of the Lincoln Oil and (las Company only a quarter of a mile distant. The latter also shows that fluid under pressure exists locally in some beds of this dolomitic limestone. Apparently the land surface was low and the percolation of surface waters extended only to a shallow depth, giving a narrow vertical range to the zone of solution cavities. Within the shallow zone, the porosity of the dolomitic beds has been modified and restricted by the irregular distribution of the chert ami the character of the bedding planes. IMPORTANCE OF SAMPLING FORMATIONS AND WATERS Very little bottom water is found with the oil in Well Xo. 1 of the Lincoln Oil and Gas Company, hut there is sufficient pressure to bring the fluid in the casing to the surface. The presence of water under pressure in the Silurian limestone and a general similarity to the chemical character of water commonly associated with oil, would prob- ably serve as good criteria in prospecting for local accumulations of oil on possible favorable structures. It is recommended that in the future, operators in this area sample all waters encountered, including water produced with the oil. The State Geological Survey is willing to supply the containers for these samples for use in connection with a state-wide study of oil-field waters, from which it is hoped much benefit will result to the operators regarding various oil-field exploration and operation problems. CHARACTER OF THE OIL The oil in the Xo. 1 well of the Lincoln Oil and Gas Company (Record Xo. 5, Macon County) is of a good "live" quality, and is re- ported as testing 39.5° Baume. The amount showing when the well was shot was indicative of a well that would make a few barrels initial 12 OIL IN 'I'll V. DECATDB AltEA product inn, luit it was not considered economical to pump it alone al a depth of 2000 feet. It was tubed and iH't to stand after the pump had sanded up during an attempt to make a pumping tesl on the beam. In this condition, the fluid has been tinder sufficienl pressure to till the casing and when the valve on the casing head is opened, a How of oil is obtained For a short time. This has been used in small quantities l>. local farmers. DETAILED STRUCTURAL CONSIDERATIONS AND RECOM- MENDATIONS FOR FUTURE PROSPECTING Introduction The structure contours on Plate I are drawn on the top of No. 5 coal which is the best representative horizon to correlate the records of test holes and mine shafts in the Decatur area with those in northern Christian County. The elevations given are based on sea level datum. Values for the altitude of No. 5 coal 2 in those borings in Christian and Moultrie comities that have not gone deep enough to penetrate the horizon of that coal have been obtained from that of Xo. 6 coal by means of the interpolated interval from the nearest isochore line (PI. I). As shown by the structure contours on the ma]), the regional dip is to the southeast. Any slight local dip to the north and west indicates the presence of some local folding. Such folding of the strata would be favorable for the accumulation of oil in petroliferous beds, only if com- plete local reversal of dip is present. Areas of Possible Local Doming There are four localities where such irregularities in the regional dip appear to exist, and are shown on Plate I by shading. One is northwest of Decatur — northwest, north and east of the recent deep drilling in sec. 32, T. 17 X., E. 2 E. (Record Xo. 3, Macon County) and sec. 5, T. 16 N., R. 2 E. (Record Nos. 5 and 6, Macon County). Another is situated in T. 1)5 X., R. 1 W. Two others of minor im- portance are located in T. 13 X.. P. 3 W.. and T. 12 X., R. 3 W. In further testing of these anticlinal noses that are shown up so definitelv in the shallow Pennsylvania!) beds, it is advisable to determine s For previous identification of Xo. 5 coal, see the following references: Kay. Fred H. t Coal resources of District VII : 111. Mining Investigations Bull. 11. p. fix, 1915. Cady, C H.. Coal resources of District IV: 111. Mining Investigations Bull. 26, p. 140, 1921. OIL IN THE DECATUE AEEA 13 the existence of complete closure in the shallow horizons before the deeper horizons are tested. THE DECATUR AREA GENERAL DESCRIPTION Of the four areas mentioned, the one at Decatur is of first im- portance, because good shows of oil have already been found in deep tests to the Silurian ("Niagara") limestone. The absence of No. 5 and No. 6 coals in the area probably indicates the existence of an elevated region in late Carbondale time and suggests shore conditions at the edge of the basin in which No. 5 coal was deposited to the east, south, and west. Some local folding causing this uplift in Pennsylvanian time is also indicated by correlating the recorded No. 5 coal south, southeast and northeast of Decatur with what appears to be its equivalent horizon in the borings northwest of Decatur. An interval between the red shales overlying the horizon of No. 6 coal and one of the coals or its equivalent horizon traceable as black shale has been used in determining the horizon of No. 5 coal. Based on these estimates, the contours show a local structurally high area from which the bedding of the strata dip northeast, southeast, and southwest. A dip to the northwest that would complete the closure in all directions has not been proved either in shallow or deep horizons but possibly may be present. The four deep tests that have been drilled in this area, three by the Lincoln Oil and Gas Company and one by the Atlantic Oil and Gas Company, are aligned approximately in a north-south direction (PL I). From examination of the various formational contacts noted in the logs in the appendix and in the cross section (fig. 1), it will be seen that in well No. 2 of the Lincoln Oil and Gas Company ( Record No. 6, Macon County) which is located slightly west of well No. 1 (Eecorcl No. 5, Macon County) the top and bottom of the Chester and the top' of the "Niagara" are higher than in No. 1, while the top of the Sweetland Creek shale is a very little lower. The bottom of the Chester is markedly higher, but this is probably accentuated by a local high erosional area on the surface of the "Mississippian Lime" before the deposition of the Chester. It is not, therefore, altogether indicative of bedding structure, although in Illinois if such erosional highs are of relatively large extent, they may indicate some folding of the Mississippian beds prior to the deposition of the overlying formations. These considerations suggest the existence (if a high local structure situated to the north and west of well Xo. 3 of the Lincoln Oil and Gas Company. 14 OIL IV THE DECATUB ABEA On the other hand, the following facts point to the existence of a high structure north and east of well No. .'!. The top and bottom of the Chester formations and of the Sweetland Creek shale show a general southward dip of approximately LO feel to the mile. This is a little greater than the average regional dip which is at a maximum in a direction somewhat east of southeast. Such a southward dip would imply a high local structure to the north or to the northeast of the test in sec. 32, T. 17' X., R. 2 E. (Record No. 3, Macon County). Additional evi- dence of a possible structural high area in this direction may he found in the trend of the lobe shown by the, shallow contours and the fact that the top of the "Niagara" in Lincoln No. 3 is a little higher than in Lincoln No. 2 and is situated slightly northeast of it. RECOMMENDATIONS FOB FTJTUBE DRILLING Tests for production therefore in this area might he located a mile and a half to the north and slightly west of Lincoln No. :'> well, or about olii 1 mile to the east of Lincoln No. ">. llowe\el', deep tests should not he undertaken until closure to the northwest in the shallower horizons has been demonstrated. Further information from the test fur struc- tural closure will help to determine the best location for a production test. OTHER POSSIBLE ABEAS ()[•' LOCAL DOMING In the light of our present knowledge, the other local structures mentioned do not present as favorable possibilities as the Decatur structure. Xo shows of oil have been reported in association with them, hut no tests on them have gone deeper than the IVimsvlvanian with the exception of an oil test by the Palmer Oil Gas and Mineral Company in sec. 15', T. 12 X.. R. 3 W. (Record No. 30, Christian County) which is situated on the edge of at least a structurally flattened area. The te I stopped in the M ississippian "Big Lime". As shown on the map. an area immediately to the west of this test might prove productive if there is structural closure farther to the west. A small area in T. L3 X.. P. •'! \V. show- a possibility of some closure in the Pennsylvanian strata. If this is also shown in horizons at greater depth, oil accumulation might be expected, hut owing to the small area of the structure, closure at depth appears doubtful. In the shaded area shown on Plate I in T. 1.'! X.. P. 1 \Y.. there is promise of the -hallow structure being represented also at greater depth. If closure can he proved in shallow horizons, a deep test would he justi- fied and probably should he located about the center of the shaded area. OIL IX THE DECATUB ABEA 15 Tlie Mount Auburn Oil and Gas Company's test in sec. 25, T. 15 X., R. 2 W. (Boring No. 19, Christian County) apparently is situated near the axis of a plunging anticline but in a position where the plunge is steep. Along the axis to the north and particularly along the axis about 4 miles to the south where the presence of some flattening' of the axis is indicated, would have been a better position for a decisive test. A slight show of oil Avas reported 10 and 20 feet below the top of the Silurian lime. Lack of data prevents more detailed knowledge regarding the pos- sibility of a local closure in the south l/o of T. 15 X., E. 2 E. and the northwest corner of T. 11 X.. R. 2 E., but there is a suggestion of a structural terrace or at least a somewhat flattened interruption of the regional dip. A test (Boring Xo. 17) in sec. 80. T. 15'' N., R. 2 E.. and one (Boring No. 20) in sec. 3, T. 14 X., R. 2 E.. Macon County, were drilled almost to the base of the Chester series. Salt water was found in the basal Pennsylvanian and Chester sandstones. This area would be of interest for further testing for favorable structural closure if the neighboring more pronounced structures prove productive. COXCLIISIOXS Where structural irregularities in the shape of anticlinal noses suggest the possibility of some local complete closure, particularly as in- dicated by the four shaded areas on Elate I, it is recommended that tests with the diamond drill be undertaken to determine the presence and amount of total closure in a suitable shallow key horizon before incurring the expense of a deep hole to fie Silurian ("Niagara") dolomitic limestone horizon. The coals of the Pennsylvanian serve as a fair index for structure determination, and have shallow depth in their favor, but although the contact between the base of the Chester series and the "Big Lime" of the Mississippian is considerably deeper and locally unconformable, it is probably a more reliable index of the structural parallelism of the deeper formations. Tests to the surface of the Mississippian "Big Lime" would provide three key horizons for correlation purposes — some coal or Limestone in the Pennsylvanian, the top of the Chester and the top of the Missis- sippian "Big Lime." Although two of these are unconformable, it is believed that they will indicate accurately enough the presence of any structural closure sufficient to warrant drilling to the deeper horizons for production. 16 OIL IN THE DECATUR \l;i \ APPENDIX— E K I'H KSKXTATIV K LOOS CHRISTIAN COUNTY No. 19 Mt. Auburn Oil and Gas Co. — No. 2 C. Montgomery farm NW. Vi, NW. %, sec. 25, T. 15 N., R. 2 W. Curb elevation— 607.8 feet Thickness Depth Feet Feet Pleistocene system Soil, sand and gravel 128 128 Pennsylvanian system Shale, white 207 345 Coal 4 349 Shale, white 46 395 Lime, white 5 400 Horizon of No. 5 coal Slate (set 10-inch casing). 100 500 Lime, white 15 515 Shale, brown 25 540 Shale, white 160 620 Sand (hole filled with water) 80 700 Slate, black 65 765 Slate, black (set 814-inch casing) 35 800 Mississippian system Upper Mississippian sub-system Chester series Lime, dark 15 815 Lime, white 5 820 Slate, white 10 830 Sand (hole filled with water) 25 855 Shale, green 3 858 Sand 4 862 Slate, white 4 866 Sand 3 869 Slate, green (set 6%-inch casing) 3 872 Lime, white 7 881 Sand 16 907 Slate, white 8 915 Pyrites of iron 5 920 Lime, brown 10 930 Sand 10 940 Lime 5 945 San>l 20 965 Lower Mississippian sub-system Lime 385 Shale, white 13 (under-reamed; set 6%- inch casing) Shale, blue 147 Lime, gray 30 1350 1363 1510 1540 Lime, white (one bailer of water per hour) 5 1545 Lime, white 35 1580 Lime, white (one bailer of water per hour).... 5 1585 Lime, white 35 1620 Lime, gray 10 1630 Lime, green 3 1633 Lime, gray 27 1660 Lime, pink 5 1665 Lime, gray 35 1700 Lime, green 15 1715 Slate, green 5 1720 Lime, white 2 1722 Rock red 13 1735 Lime, brown 20 1755 Sweetland Creek shale Shale, blue 45 1800 Lime, brown 10 1810 Shale, brown 100 1910 Silurian system Lime, brown 116 2026 From 1910 to 2000 feet, sand was noticeable in lime. At 1920 to 1930 more sand was shown and also a show of oil. No trace of gas any place in hole. Well abandoned at 2026 feet. No. 21 Byrd-Wittey Cen. E. line, 8E. %, NW. %, sec. 2.',, T. I) N.. R. 1 W. Curb elevation — 607 feet Thickness Depth Ft. in. Ft. in. Pleistocene system Clay 30 ... 30 Clay and gravel 60 ... 90 Clay and gravel 54 ... 144 Pennsylvanian system Soft shale 2 ... 146 Slate 7 ... 153 Sandstone 4 ... 157 Slate 2 ... 159 Gray shale 7 ... 166 Gray shale 9 . . . 175 Dark shale 3 . . . 178 Fire clay 6 . . . 184 Gray shale 9 . . . 193 Dark shale 5 . . . 198 Limestone 6 ... 204 Gray shale 1 ... 211 Dark shale 5 . . . 216 Dark shale 8 . . . 224 Gray shale 3 . . . 227 CHRISTIAN COUNTY 17 No. 21 — Concluded Dark shale 4 . . . 231 Gray shale 8 . . . 239 Dark shale 11 . . . 250 Gray shale 14 ... 264 Dark shale 8 . . . 272 Gray shale 14 . . . 286 Dark shale 6 . . . 292 Dark shale 6 . . . 298 Gray shale 15 ... 313 Gray shale 7 . . . 320 Dark shale 6 . . . 326 Gray shale 11 . . . 337 Dark shale 2 8 339 8 Coal 12 340 10 Gray shale 12 342 Gray shale G . . . 348 Sandstone 2 ... 350 Dark shale 6 ... 356 Gray shale 10 . . . 3G6 Dark shale 32 . . . 392 Gray shale 21 . . . 419 Dark shale 13 . . . 432 Dark tough shale 23 ... 455 Gray shale 11 ... 466 Gray shale 8 . . . 474 Black shale 12 475 Coal 1 10 477 Blue shale 2 . . . 479 Gray shale 3 3 482 3 Coal 16 483 9 Limestone 5 9 489 . . Sandstone 4 ... 493 . . Gray shale 11 ... 504 .. Blue limestone 8 ... 512 . . Black shale 2 4 514 4 Coal (No. 6) 2 10 517 2 Shale band 3 . . . 517 5 Coal (No. 6) 3 6 520 11 Soft dark shale 1V> 521 % Coal (No. 6) 1 iy 2 522 2 Sulphur band 1 522 3 Ccal (No. 6) 1 10 524 1 Fire clay 4 11 529 . . Dark shale 3 . . . 532 . . Gray shale 7 . . . 539 . . No. 22 Stonington Well NE. K, SE. %, sec. 28, T. l' t N.. R. 1 W. Curb elevation — 613 feet Thickness Depth Ft. in. Ft. in. Pleistocene system Soil 3 ... 3 .. Clav, yellow 4 ... 7 .. Clay, dark 6 . . . 13 . . Sand, gray 5 ... 18 Gravel 3 Clay 3 Sand and gravel 10 Gravel 2 Clay, yellow 16 Clay, yellow 5 Sand, fine 5 Sandy clay 14 Clay and gravel 6 Gravel . . . Clay, blue Clay, blue Sand, fine Sand ...24 ... 1 ...16 Sand and gravel 2 Pcnnsylvanian system Lime, soft, shale 10 Shale, blue 7 Limestone 7 Limestone 3 Shale, blue 21 Limestone 4 Shale, blue sandy.... lo Lime Shale, black 2 Coal Shale, soft, green.... 5 Lime, shale 9 Shale, blue 4 Sbale, black 4 Shale, blue, sandy... 10 Sandstone 2 Shale, blue, sandy. .. .21 Shale, blue, sandy... 27 Shale, dark blue 8 Shale, black Coal 1 Shale, blue 2 Shale, blue 3 Sandstone 7 Shale, blue 7 Shale, blue 28 Blue slate with brown sulphur 43 Sand shale with 2 inches of coal 1 Fire clay 4 Shale, black 15 Limestone 3 Limestone 3 Shale, black 8 Fire clay 2 Shale, black 5 Coal 6 Shale and limestone. 14 Limestone 5 Shale or clod Coal (No. 6) 7 Fire clay 3 Lime shale 9 Limestone 1 Slate, black 3 21 24 34 36 52 57 62 76 82 85 120 144 145 161 163 173 180 187 190 211 6 216 226 226 8 228 li 229 2 234 8 243 8 248 4 252 4 262 4 264 4 285 312 4 321 321 4 322 7 325 4 328 4 335 4 342 4 370 4 413 4 414 7 418 7 434 4 437 10 441 4 449 10 451 10 452 3 452 9 466 9 472 4 472 11 480 4 483 10 493 4 494 10 497 10 18 OIL IN THE DECATUR AltEA No. 22 — Conducted Coal 4 2 Blue shale clay 10 Fire clay 2 Limestone 5 I Lime shale 8 8 Sand shale 2 . Sandstone 4 . Sand shale, blue 15 . Sand shale, blue 8 . Sand shale, blue 10 . Slate 8 1 Coal (No. 5) 2 7 Fire clay 3 4 Sand shale, blue 6 . Shale, sandy 4 . Blue shale 11 7 502 .. 502 10 504 10 510 2 518 10 520 10 524 10 539 10 547 10 557 10 565 11 568 6 571 10 577 10 581 10 593 5 No. 23 Taylor and Byrcl — No. G NW. cor. SW. %, NW. %, sec. 1, T. lit N., R. 2 W. Curb elevation — 567.3 feet Thickness Ft. in. Pleistocene system- Soil 3 Clay, blue 12 Sand 3 Gravel, fine 10 Gravel 12 Clay, blue, mixed gravel 7 Pennsylvanian system Shale, gray, sandstone partings 5 Shale, soft, gray, sand- stone partings 5 Shale, soft, gray 7 6 Coal 1 Limestone, broken ..14 .. Slate, dark 4 Shale, soft, s ti c k y, gray 2 Limestone 2 Shale, dark 3 Lime shale 10 Shale, soft, sticky, gray 8 Shale, gray L6 Shale, sandy 10 Shale, gray 49 11 Coal 1 4 Shale, sandy, gray.... 23 9 Shale, sandy 19 .. Shale, gray 39 .. Shale, blue, brown sandstone 20 Depth Ft. in. 3 15 18 40 47 52 .. 57 .. 64 6 65 6 81 .. 87 .. 89 .. 92 .. 102 .. 110 .. 126 .. 136 .. 185 11 187 3 211 .. 230 . . 269 .. 289 .. Limestone 4 Shale, dark 7 Slate, dark 1 Shale, very soft, gray. :; Shale, gray, red streaks 2 Limestone, hard 2 Shale, yellow 3 Shale, dark 6 Limestone, hard .... 9 Shale, dark 7 2 Coal 1 10 Shale, gray 2 Lime shale 15 Lime shale, gray 7 6 Limestone, hard 1 Slate, black 1 Limestone 1 Slate, black 4 Limestone - Coal (No. 6) 5 2 Fire clay 10 Shale, gray 18 Lime shale 4 Shale, gray, brown bands 21 . . . Slate, black 7 3 Coal (No. 5) 2 6 Fire clay 3 Lime shale 9 6 Coal 6 Shale, dark 1 Coal 4 Shale, dark 6 8 Coal 4 Shale, dark 2 8 Shale, gray 15 Sandstone 2 Shale, gray 2 Shale, blue 26 ... Slate, dark 5 Coal 1 7 Limestone 1 5 Shale, dark 5 8 Coal 2 Shale, dark 9 4 Lime shale 8 Shale, gray 5 Slate, black 5 10 Coal 2 Shale, dark 4 2 Shale, gray 4 Sandstone 1 Shale, dark 4 8 Coal 2 Lime shale 3 4 Shale, dark 13 Sandstone 1 Shale, dark 1 ... Lime shale 4 8 Coal 1 10 Lime .shale 6 293 30 1 301 304 306 308 311 317 326 333 2 336 338 353 360 6 361 6 362 6 363 6 363 L0 364 369 2 370 388 392 413 420 3 422 9 423 432 6 433 r.'A 434 4 441 441 4 444 459 461 463 489 494 495 7 4!' 7 502 8 504 8 514 522 327 532 10 534 10 539 543 544 548 8 550 8 554 567 568 569 .-.75 8 575 6 576 CHRISTIAN COUNTY. 19 577 581 592 612 626 645 653 656 66S 686 707 719 754 771 773 777 No. 23 — Concluded Shale, gray 1 . Sandstone 4 . Shale, dark 11 . Shale, sandy 20 . Shale, dark 14 . Shale, sandstone part- ing 20 . Shale, dark 7 . Sandstone 3 . Shale, dark 12 . Shale, sandy 18 . Sandstone 21 . Shale, dark, brown bands 12 . Shale, dark 35 . Sandstone, shale part- ing 17 . Lime shale, soft 2 . Conglomerate 4 . Mississipian system Upper Mississippian subsystem Chester series Lime shale, soft 9 ... 786 Lime shale 14 . . . 800 Limestone, hard 1 ... 801 Sandstone, hard 5 . . . 806 Sandstone, hard, shale parting 29 . . . 835 Lime shale 2 ... 837 Limestone 9 ... 846 Sandstone 8 . . . 854 Sandstone, very coarse- grained 18 ... 873 Limestone 3 ... 876 No. '24 Byrd-Willey — No. 15 Cen. N. line NW. %, NW. %, sec. 16, T. J'i N.. R. 2 W. Curb elevation — 585.1 feet Thickness Depth Ft. in. Ft. in. Pleistocene system Soil 4 Clay, yellow 8 Clay, blue 6 Clay, blue, fine gravel 7 Sand 5 Gravel 5 Clay, yellow, fine gravel 63 Gravel 2 Clay, blue 5 Pennsylvanian system Shale, dark 7 Limestone 1 4 12 18 25 30 35 98 100 105 112 113 9 2 8 11 6 Shale, gray 11 Shale, soft, gray.... 6 Limestone, very hard 6 Slate, dark 4 Shale, very soft, gray 4 Shale, soft, gray.... 3 Limestone 5 Shale, gray 16 Lime shale with hard bands 9 Lime shale 4 Shale, gray, brown bands 23 Shale, tough, dark. .29 Shale, gray 6 Coal 1 Shale, very soft, gray 3 Shale, sandy 16 Shale, sandy, gray... 40 Shale, tough, gray... 10 Shale, sandy 9 Shale, tough, dark.. 24 Shale, gray 16 Shale, very soft, gray, and red 7 Shale, blue 6 Limestone 4 Shale, gray 6 Coal (No. 7) 4 Fire clay Shale, very soft, gray 4 Limestone, hard ... 1 Shale, dark 4 Shale, gray 11 Shale, dark 5 Slate, black 2 Coal (No. 6) 5 Shale, gray 1 Sandstone 4 Limestone 7 Shale, blue 32 Slate, black 7 Coal (No. 5) 3 Shale, gray 1 No. 25 Byrcl-Willey—No. 1G SW. cor.. SW. %, NW. 14, sec. 20, T. l.'i N., R. 2 W. Curb elevation — 585.8 feet Thickness Depth Ft. in. Ft. in. Pleistocene system Soil 2 ... 2 . . Clay 16 . . . 18 . . Cement and gravel... 2 ... 20 . . Clay, blue gravelly. . .59 ... 79 . . 8 7y 2 8% 124 130 136 140 144 147 152 168 177 181 204 233 239 240 5 244 260 300 310 319 343 359 366 372 9 376 11 383 7 388 6 389 393 394 398 409 414 416 8 422 3 V 424 428 435 467 475 7 478 9 480 20 (ill. IN THE DECATUR AREA No. 25 — Concluded Sand 4 6 Pennsylvanian system (Shoal and Carlinville limestone 114-175 feet) Shale, blue 6 Shale, soft blue 30 Shale, soft gray, lime. 6 Limestone 3 Shale, soft lime 4 Limestone 2 Lime shale 3 Limestone 7 Shale, dark 9 Lime shale 10 4 Limestone 5 8 Clay shale, soft 5 Lime shale pebbles... 6 .. Sandstone 10 Shale, sandy 43 Shale, tough blue, with brown bands 15 .. Shale, dark 3 7 Coal, bony 3 Coal 1 2 Clay shale 3 Limestone 1 6 Shale, sandy 40 6 Shale, tough blue. ... 6 Shale, tough blue, brown bands 41 Lime shale 7 Shale, soft gray and red 8 Shale, sandy 12 .. Limestone 3 6 Shale, black 2 Shale, dark 5 9 Coal 1 9 Coal, bony 5 Coal 1 Shale, blue 4 2 Limestone 4 11 Shale, gray Limestone 1 Lime shale 3 4 Limestone 5 7 Shale, black 1 Coal (No. 6) 3 5 Shale 1 Coal 9 Fire clay 9 Clay shale 1 Limestone 4 Lime shale, lime bands 12 Shale, blue, b r o w n bands 2 Shale, tough, blue 5 Limestone 7 Shale, black 2 9 83 6 Cn efc from, 84 114 120 123 127 129 132 139 148 158 4 1G4 109 175 185 228 243 246 7 246 10 248 251 252 6 293 299 340 347 355 367 370 6 372 378 3 380 380 5 381 5 385 7 390 6 391 392 395 4 400 11 401 404 5 404 6 405 3 406 407 411 Coal, bony 3 429 Coal 4 9 433 9 Fire clay 3 434 . . Shale, blue 1 . • • 435 . . \'o. 2"i Byrd-~\Yille>j—Xo. Hi NW. i,, SE. ',. NE. Vi, sec. 1.1. T. 13 X.. H. J W. Curb elevation — 573 feet Thickness Depth Ft. in. Ft. in. Pleistocene system Clay 11 ... 11 .. Sand 22 ... 33 .. Clay and loose rock . . 32 . . . 65 . . / V a n s id va n ia n s i/stcm Shale, black 16 66 6 Coal 6 67 Shale, light 15 ... 88 Shale, sandy 23 . . . 105 Sandstone 4 . . . 109 Sand shale 1 ... 116 Sandstone 31 . . . 147 Shale, dark blue 6 .. . 153 Shale, soft 8 . . . 161 Shale, blue with a few limestone bands ...]0 ... 171 Limestone 11 ... 182 Shale, black 3 . . . 185 Shale, blue 8 . . . 193 Shale, dark 1 ... 200 Shale, soft, light 4 . . . 204 Shale, light with lime- stone nodules 6 ... 210 Shale, light sandy 6 ... 216 Shale, tough blue 5 .. . 221 Shale, blue 4 6 225 6 Limestone 1 ... 226 6 Shale, black 13 227 9 Coal, bony 6 228 3 Shale, soft 8 . . . 236 3 Sandstone, soft 2 6 238 9 Shale and sandstone mixed 7 Shale, blue 58 3 Shale, black 16 Coal, bonv 6 423 .. 425 .. 425 5 426 .. 428 9 Shale, sandy 4 Shale, soft 1 Shale, sandy 58 Shale, tough blue 12 Shale, blue 14 10 Coal, bony 2 Shale, soft 3 6 Limestone 6 Shale, soft light with limestone nodules . 2 . . . Shale, hard 6 245 9 304 . . 305 6 306 .. 310 . . 311 . . 369 .. 381 . . 395 10 396 . . 399 6 400 .. 402 .. 408 .. CHRISTIAN" COUNTY 21 Xo. 27 — Concluded Shale, soft light 3 6 411 6 Shale, black 2 ... 413 6 Shale, variegated .... 8 ... 421 6 Limestone and shale. 2 6 424 . . Shale, light 4 ... 428 . . Shale, variegated 8 2 436 2 Shale, dark 10 437 Shale, soft light 1 . . . 438 . . Shale, dark 2 438 2 Coal 3 5 441 7 Shale, soft light 4 11 446 6 Shale, dark 6 447 . . Coal 6 447 6 Shale, light 3 6 451 . . Lime shale 14 ... 465 .. Limestone 2 6 467 6 Limestone, dark fos- siliferous 2 11 470 5 Shale, dark 2 470 7 Coal (No. 6) 7 9 478 4 Shale, soft light 9 2 487 6 Shale, black 2 ... 489 6 Coal 4 6 494 . . Shale, light 1 . . . 495 . . Xo. 28 Byrd-Willey— No. 13 NW. %, NW. %, SE. %, sec. 13. T. 13 N., R. 2 W. Curb elevation — 601 feet Thickness Depth Ft. in. Ft. in. Pleistocene system Clay 14 ... 14 . Sand 8 ... 22 . Clay and rocks 11 ... 33 . Sand, coarse 7 . . . 40 . Sand, fine 4 ... 44 . Clay and sand 37 ... 81 . Sand 23 ... 104 . Clay 17 ... 121 . Sand 8 ... 129 . Clay 7 ... 136 . Sand 11 ... 147 . Gravel 2 ... 149 . Clay, sandy 2 . . . 151 . Loose boulders 16 152 6 Pennsylvanian system- Sandstone 9 6 162 . . Shale, blue 3 . . . 165 . . Shale, soft light 19 ... 184 . . Limestone (C a r 1 i n- ville) 9 6 193 6 Shale, light 1 . . . 194 6 Shale, black 2 6 197 . . Shale, blue 15 . . . 212 . . Shale, soft with hard lumps 7 . . . 219 .. . Limestone and shale mixed 6 . . . 225 .. . Shale, light 3 6 228 6 Limestone 4 . . . 232 6 Shale, black 16 234 .. . Shale, soft, light 6 ... 240 .. . Lime shale 3 6 243 6 Shale, light 9 2 252 8 Coal 10 253 6 Shale, light 16 255 .. . Shale, sandy 9 . . . 264 .. . Sandstone 9 . . . 273 .. . Shale, sandy 9 . . . 282 .. . Shale, blue 39 2 321 2 Coal 13 322 5 Shale, soft 17 324 .. . Shale, blue i ... 328 .. . Shale, sandy 4 . . . 332 .. . Sandstone, soft with a few shale streaks. 40 ... 372 ... Shale, blue 18 . . . 390 .. . Shale, tough, blue... 29 ... 419 .. . Coal 3 419 3 Shale, soft 4 9 424 .. . Shale, tough, blue... 5 ... 429 .. . Shale, soft 4 . . . 433 .. . Shale, dark 2 . . . 435 .. . Limestone, blue 6 435 6 Shale, soft, varie- gated 10 6 446 . .. Shale, dark blue 2 7 448 7 Coal (No. 7) 7 449 2 Shale, dark 10 450 . . . Lime shale 3 ... 453 . . . Limestone 4 ... 457 . . ■ Limestone and shale 2 . ■ ■ 459 . . . Sandstone 6 6 465 6 Limestone 16 467 . . . Shale, black 6 2 473 2 Coal (No. 6) 5 4 478 6 Sulphur band % 478 6y 2 Coal (No. 6) 6 479 % Blue band 1% 479 1% Coal (No. 6) 17 480 8% Sulphur band % 480 9 Coal (No. 6) 4 481 1 Shale, light 7 11 489 .. . Shale, soft 4 . . . 493 . . . Limestone mixed with shale 7 . . . 500 .. . Shale, soft 4 . . . 504 . . Shale, light 5 . . . 509 .. . Shale with sand streaks 5 ... 514 . . . Shale, gray 6 . . . 520 .. . Shale, blue 34 . . . 554 .. . Blue rock, hard 1 ... 555 ... Shale, black 6 6 561 6 Limestone, blue 11 562 5 Shale, black 2 562 7 22 OIL l.\ THE DEOATUR AliKA \n. 28 -Concluded Coal (No. 5) 2 4 Shale, soft 4 1 Shale w i t h sand streaks Shale, gray 17 Shale, black 4 Coal 1 Shale, blue G Sandstone 5 Shale, blue 26 G Shale, soft 7 Shale, dark 1 Coal 1 Shale parting Coal 1 Shale, soft 1 Sandstone 7 Shale, sandy .... Shale, blue 8 Shale, black 3 Coal 1 Shale, light sandy... 1 Shale, light 6 Shale, sandy 4 Sandstone 4 Shale, blue 1 Coal, bony Shale, soft 3 Shale, light 2 Shale, dark 2 Coal Shale, dark 1 Shale, soft 5 Limestone 2 Coal Shale, blue 15 Shale, black 2 Shale, gray 4 Shale, blue 2 Shale, dark blue. ... 9 Coal (No. 2) 2 Sandstone, soft 17 Shale, light 3 Shale, dark 2 Shale, blue with sandstone streaks. 3f> Sandstone 34 Sandstone and shale mixed 15 Shale, blue with sand streaks 19 Sandstone and shale mixed 23 Sandstone 4 Shale, dark blue 27 Mississippian system Upper Mississippian sub- Chester series Limestone 31 3 3 2 10 8 6 564 11 569 575 592 596 597 597 6 602 6 629 636 637 638 3 638 6 639 8 641 6 648 6 657 665 668 8 669 10 671 677 681 685 6 686 6 686 10 690 692 694 5 694 10 696 701 703 9 704 4 719 6 721 6 726 728 737 3 739 7 757 700 762 798 832 847 866 889 893 919 system , 950 Xo. 29 Well near Clarksdale con /VW «S^~ %, sec. IS, T. 12 N., R. S W. Depth Ft. in. 19 . 66 . 78 . 89 . 91 . 92 . 94 . 108 . 122 . 124 . 129 . 140 . 141 . 142 . 146 . 158 . 160 . 164 . 177 . 178 . 190 . 217 . 245 . 268 . 306 . 330 . 347 . 366 . 380 . 386 . Curb elevation--620+ feet Thickness Ft. in. Pleistocene syst* m Clay, yellow 19 Clay 29 Clay, yellow 12 Clay, blue 11 Gravel and clay 2 Gravel and clay 1 Pennsylvanian system Clay shale 2 Shale, blue 14 Shale, blue 14 Limestone 2 Shale, blue 5 Limestone 11 Shale, gray 1 Shale, blue 1 Shale, gray 4 Shale, blue 12 Shale, blue 2 Shale with limestone bands 4 Shale, sandy 13 Shale, black 1 Shale with limestone bands 12 Sandy shale 27 Sandstone 28 Sandstone 23 Sandstone 38 Shale, sandy 24 . Shale, sandy 17 . Shale, sandy 19 . Shale, blue 14 . Shale, blue 6 . Shale, dark blue 2 . Shale, sandy 11 . Shale, sandy 18 . Shale, sandy It: . Shale, blue 3 . Shale, blue 1 8 Conglomerate 9 Shale, dark blue 7 . Shale, blue 2 . Shale, dark blue 7 Shale, dark blue 2 . Limestone, shale part- ings 1 Shale, sandy 13 . Shale, light blue 2 . Shale, light blue 11 . Shale, light blue 5 7 Coal (No. 5) 2 4 399 417 4:13 436 437 8 438 5 445 5 447 5 448 450 451 ? 464 466 477 481 7 483 11 CHRISTIAN COUNTY 23 No. 29 — Continued Shale, light blue 6 Shale with streaks of limestone Shale, black 2 Shale, blue 15 Shale, blue 1 Shale, sandy 2 Shale with limestone bands 4 Shale, blue 16 Shale, sandy 2 Shale, sandy 3 Shale, black 7 Shale, black 7 Shale, blue 2 Shale, sandy 1 Shale 8 Shale, dark blue, sandy 13 Sandstone 3 Shale, dark blue Shale, sandy 17 Shale, blue 9 Shale, dark blue 5 Coal 1 Coal Limestone Shale, blue Sandstone 1 Shale, blue, sandstone bands 3 Shale, blue, sandstone bands 2 Coal Coal 1 Shale, soft 2 Sandstone 10 Shale, sandy 3 Shale, sandy 6 Shale, blue with lime bands 3 Shale, dark blue 1 Coal Coal Fire clay 1 Sandstone 6 Sandstone, shale part- ings 2 Sandstone 5 Shale, sandy 4 Shale, blue with bands 7 Shale, blue 8 Slate, dark blue, coal partings 1 Same Shale, blue 2 Shale, soft 1 Sandstone Shale, blue, soft 1 490 . . 10 497 ? 499 514 515 517 521 537 539 542 549 555 1 557 558 567 580 583 6 584 601 610 615 616 6 617 2 617 10 618 4 619 10 623 . . 625 7 626 . . 627 ?2 629 6 639 6 643 .. 649 .. 652 . . 653 10 654 4 655 2 656 6 663 .. 665 . . 670 .. 674 .. 681 .. 689 . . 690 .. 690 6 693 . . 694 .. 694 8 696 6 Band coal 6 Coal 1 9 Shale, blue 9 Sandstone 4 Shale with sandstone partings 5 6 Sandstone 1 6 Shale, blue, sandstone partings 7 8 Coal and shale mixed . . 7 Coal 3 Coal 2 9 Shale, light blue 5 3 Shale, sandy, sandstone bands 18 Sbale, sandy, sandstone bands 13 Shale with sandstone bands 6 6 Sandstone, soft 2 1 Coal 5 Coal 9 Sandstone 1 Sandstone, shale, sand- stone bands 7 3 Sandstone, shale part- ings 6 Sandstone, shale part- ings 4 Shale, sandstone part- ings 7 Shale, dark blue 9 Shale, blue 13 6 Sandstone 6 Shale, blue 4 Shale with sandstone partings 3 Shale, blue 4 Sandstone 1 Shale, blue 1 697 .. 698 9 699 6 703 6 709 .. 710 6 718 2 718 9 719 .. 721 9 727 .. Miss iss ipp ia n sys tc m Upper Mississippian sub Chester scries Shale, limestone bands 3 Limestone T imestone 1 Shale, limestone bands 6 Shale, limestone bands 9 Shale, soft 2 Limestone, shale part- ings 1 Limestone 2 Shale, soft lime 4 Shale 2 Limestone 2 Limestone, shale part- ings 1 Lime shale 2 Limestone, shale part- ings 1 Shale with bands 3 745 . . 758 . . 764 6 766 7 767 .. 767 9 768 9 776 782 786 793 802 815 6 816 . 820 . 823 . 827 . 828 . 829 system, 4 832 8 833 834 840 849 851 852 854 858 2 858 860 4 861 6 864 865 24 Oil IX THE DECATUE ABEA N"o. 29— Concluded Limestone 2 ... 870 . . Limestone, shale streaks 4 ... 874 . . Limestone 1 6 875 6 Shale, limestone bands 6 876 . . Limestone 10 870 10 Shale, limestone hands 1 2 878 Limestone 25 . . . 903 Limestone, shale part- ings 8 ... 911 Lime shale 5 ... 916 Lime shale, clay partings 4 ... 920 Sandstone 21 . . . 941 Shale 4 6 945 6 Shale, blue 14 . . . 965 . No. 30 Palmer Oil Gas and Mining Co. — No. 1 NE. !,, 8E. U, sec. 15, T. 12 N., R. 3 W. Curb elevation — 625 feet Thickness Depth Feet Feet Pleistocene system Drift, dirt 28 28 Hardpan, mixed with gravel 52 80 Pcnnsylvanian system Shale, white 10 90 Bastard lime 7 97 Slate, white 53 Coal, 12 to 18 in 2 Slate, white 68 Shale, black 10 Slate, white 20 Shale, pink 10 Slate, white 110 Slate, black 15 Slate, white (Horizon of No. 5 coal, 460±) 135 Shale, black 20 Shale, white 80 Shale, black 20 Slate, white 190 Sand, white, 1st salt water 30 Mississippian system Upper Mississippian suo- Chester series Slate, pink 35 Sand, 2d salt water. . . 10 Slate, white 40 Shale, pink 25 Sand, 3rd salt water.. 10 Slate, light brown.... 40 Sand, light, 4th salt water 15 Slate, white 5 Limestone 15 Sand and salt water . . 5 Last mud above Big Lime 10 Slate cap Mississippian lime 5 Lower Mississippian sub In Mississippian lime. 15 MACON COUNTY No. 1 T. C. Grady farm NW. Vi, SW. H, sec. 2. T. 18 N.. R. 2 E. Curb elevation — 714 feet Thickness Depth Ft. in. Ft. in. Pleistocene system Clay 62 62 . . Gravel, hardpan .... 6 68 .. Clay 16 84 .. Hardpan 129 213 .. Hardpan, sandy .... 6 219 . . Clay, bardpan 54 273 .. Pennsylvaniam system Limestone 15 288 .. Shale, light 1 289 .. Shale, black 2 291 .. Shale, gray 5 296 .. Limestone 4 300 . . Shale, light 12 312 . . Sand shale 30 . Shale, gray 28 . Limestone 10 . Shale, gray 19 . Shale, sandy 90 . Slate, dark 10 . Coal 6 Fire clay 16 Sandstone, gray .... 3 . Shale, light 8 . Limestone 9 . Shale, blue 4 . Limestone 7 . Sand, shale 34 . Slate, black 3 6 Coal (No. 5) 16 Slate, dark 4 Limestone 17 Sand, shale 20 Slate, black 4 Shale, light 6 Limestone 4 150 152 250 260 280 290 4(i0 415 550 570 650 670 860 890 system 925 935 975 1000 1010 1050 1065 1070 1085 1090 ? 1100 ? ? 1115 ? system ? 1230 ? 342 370 380 399 489 499 499 501 504 512 521 525 532 566 569 571 575 592 612 616 622 626 *? MACON COUNTY 25 No. 3 Lincoln Oil and Gas Co. — No. 3 Parish farm, Xo. 1 SW. %, 8E. %, 8E. %, sec. 82, T. 11 N.. R. 2 E. Curb elevation — 644 feet Driller's log Thickness Depth Feet Feet Pennsylvanian system Limestone, argillaceous, light gray 10 200 Same 5 205 Missing 10 215 Same 5 220 Shale, sandy gray, and coal 30 250 Shale, sandy, brown 10 2(50 Shale, laminated, sandy, light and medium gray banding — some carbonaceous partings 5 265 Shale, gray, slightly sandy 5 270 Shale, gray to brown, slightly sandy 5 275 Same 5 280 Shale, black, carbonaceous, slightly sandy 20 300 Missing 40 340 Limestone, hard crystalline, white to light gray 5 345 Limestone, hard crystalline, white and gray 5 350 Shale, brown, with some thin beds of black carbonaceous shale. . . 5 355 Shale, pink 5 360 Shale, variegated light colored with some limestone, possibly con- cretions 10 370 Shale, gray, with thin interbedded limestone 10 380 Shale, brown, shading from reddish to gray 10 390 Shale, gray, medium dark 10 400 Missing 25 425 Limestone, brown to gray with carbonaceous and argillaceous partings 5 430 Shale, gray, with thin bedded limestone 10 440 Shale, gray to brown, with occasional lime pellets, probably con- cretionary 20 460 Shale, red cavy 15 475 Slate, blue 50 525 Slate, white 75 600 Slate, blue 25 625 Slate, white 5 630 Sand, salt water 30 660 Coal 8 668 Slate, white 12 680 Red rock 40 720 Slate, blue 30 750 Slate, white 50 800 Shale, red 25 825 Coal 5 830 Slate, white 20 850 Shale, black 25 875 Mississippian system, Upper Mississippian sub-system Chester series White lime 25 900 Slate, blue, 814-inch set 925 feet, cave 25 925 Shale, black, underreamed 814-inch 1005 feet 25 950 ". J li OIL IN T 1 1 1; DECATUU .\i;i-..\ \n. :; — Concluded Slate, white 25 975 Lime, blue 5 980 Slate, blue ] 20 1000 Lime, sandy, with water 20 1(120 Slate, blue 10 1030 Shale, red, cave, 6%-inch set 1050 feet 10 1040 Lime, sandy, underream, 6%-inch, 1100 feet 20 L060 Lime, white 20 1080 Slate, blue, caves 20 11 00 Lime, with show oil 5 1105 Slate, blue 10 1115 Sand, water 10 112.", Lower Mississippian sub-system. Lime, broken 20 1145 Lime, with water in 1300 230 1375 Slate, white 25 1400 Lime 50 1450 Slate, blue 50 1500 Lime, blue 25 L525 Lime, white 75 L600 Slate, blue 25 1 625 Lime, white, hard, carried water 125 1750 Lime, white, bottom of lime formation 20 1770 Shale, blue 5 1 775 Lime, blue 20 1795 Shale, red 5 1 800 Shale, white 5 1805 Lime, blue 5 3/16-inch, set 1820 15 1820 Lime, broken 10 1830 Sweetland Creek shale Shale, broken 10 1840 Shale, black 60 1900 Shale, black 50 1950 Lime, gray 5 1955 Shale, black 40 1995 saurian system Lime and flint 10 2005 Cavity with white mud 5 2010 Lime and flint 16 2026 Lime, softer, light buff sandy 10 2036 Lime and flint 4 2040 No. 3 Lincoln Oil and Gas Co. — No. S Parish farm, No. 1 SW. V ( , SE. i',, 8E. %, sec. 32, T. 17 N., A\ 2 E. Curb elevation — 644 feet Log based on study of samples Thickness Depth Feet Fet t Samples begin at 190 feet Limestone, argillaceous, light-gray, sandy; siltstone, light-gray, sandy; shale, green-gray, laminated, micaceous, sandy; every- thing pyritic .". 10 200 Pennsylvanian system Same, limestone most abundant; some carbonaceous soft, black shale, and carbonaceous bits all through sample 5 205 MACON COUNTY 27 Xo. 3 — Continued Missing 10 215 Same, with some chalky white chert 5 220 Siltstone, gray, micaceous (muscovite) pyritic, calcareous, glau- conitic, sandy, carbonaceous; coal, glossy, iridescent, dense, laminated, 50 per cent of sample 30 250 Siltstone as in preceding, dark gray, with faint chocolate cast and limonitic spots, laminated with some laminae gray and others carbonaceous 10 2G0 Same, less brownish 10 270 Same, very fine grained, distinctly light brown 10 280 Shale, black, fissile, filled with powdery, pyritic seams and im- pregnated with pyrite and mica 20 300 Missing 40 340 Limestone, light gray, finely crystalline with laminae of siltstone, dark calcareous; some soft white chert 5 345 Same, darker 5 350 Shale, mottled, light- and dark-gray, soft, poorly laminated, non- calcareous; some thin layers of harder, black, carbonaceous shale 5 355 Shale, highly calcareous, variegated red, purple and green-gray, the last being harder than the rest 5 360 Same, less red and purple, more gray with brown, so sample looks lighter colored; contains bits of white, calcareous segregations. 10 370 Same, dark green to light greenish-gray, with pyritic segregations along old plant remnants 10 380 Same, dark purplish-brown, with an abundance of small pyritized fossils, some of which show impressions 10 390 Same, darker, less purple 10 400 Missing 25 425 Limestone, light drab, medium crystalline, good fossils of small brachiopods; shale, non-calcareous, dark green or brownish, poorly laminated ; remnants of plant fragments 5 430 Shale, greenish-gray, while larger fragments are rich chocolate or purplish; non-calcareous 10 440 Shale, dark, in fragments, light-greenish gray in cuttings; hard, non-laminated when fresh, non-calcareous 20 460 Same 14 475 Horizon of No. 5 coal Shale, black, carbonaceous, poorly fissile; rounded fragments of chert and limestone that may be surficial 5 480 Siltstone, greenish-gray, abundant pyrite in small crystals; some shale, greenish or black, probably from above 20 500 Shale, bluish-black, cai'bonaceous, soft 20 520 Shale, light greenish-gray; limestone, dark gray, crystalline 20 540 Shale, black, carbonaceous, fissile, combustible 10 550 Missing 1110 1660 Loiver Mississippian system Limestone, blue-gray, finely crystalline, granular with fragments of fine-grained, bluish fissile siltstone and a little chalky chert. . 5 1665 Missing 1665 1960 Swcctland Creek shale Siltstone, fine grained, or silty shale, non-calcareous, fissile, fragile, dark-blue or brown-black, with sand grains of medium size and angular contour, and with large rosin-like spores 2 1962 Shale, dark chocolate-brown or light-green, hard, fissile, spores abundant, especially in brown; fragments of a crystalline rock, either black and white quartzite or pyroxenite, probably foreign, as are other fragments of quartz, etc., in sample 8 1970 Same, all black, with foreign material 10 1980 Same, some rusty brown 5 1985 28 OIL IN TIIK DECATUB AREA No. 3 — Concluded Same, with much foreign material ground up and looks like sand- stone; the shale is mainly dark, almost black, dense, non-fissile, but brittle, breaking into angular fragments; sandstone, fine grained, gray, heavily pyritic; limestone, bluish gray, very cherty, the chert dense, bluish white or blue; large iron flakes; some purple shale 10 1995 Silurian system. Shale, 00 per cent, dark green, brittle, dense, non-laminated; 10 per cent limestone, blue-gray, pyritic, sandy; 30 per cent blue or blue-white dense chert 5 2000 Limestone, light bluish gray, sandy, finely crystalline, rusty from drill cuttings and with much dense bluish-white chert, and shale from above; the sand grains are large, sub-angular 2 2004 Same, less rusty 2 2004 Siltstone, light gray greenish tinge, fine grained, sandy calcareous 1 2005 Same, chert is dark blue; limestone is light-gray, rusty, pyritic. .. 2005 Fragments shot from well showing light bluish-gray, finely crystalline limestone and dense blue chert with white coating. . 20 2010 Mainly blue chert, with greenish, pyritic siltstone, angular Quartz sand grains and some limestone as before, and calcite crystals. . . 2010 Same as fragments, 1990-2010 feet 5 2015 Same, chert, probably 70 per cent, with some greenish-gray silt- stone and black shale 2 2017 Same, more siltstone 1 2018 Fragments from second shot, same as from first shot 9 ? 2018 Same, sandy 2 2020 Odor of oil 2 2022 Mostly chert with a quantity of green, siliceous, non-laminated, soft shale and some hard brown laminated shale. Shale may be cavings. Some dolomite and calcite, a few sand grains and a little pyrite 4 2026 Chert and fine-grained, sandy dolomite and dark-gray, hard shale, somewhat laminated 2 2028 Chert and fine grained sandy dolomite; some calcite and pyrite, slightly less chert. Slight smell of oil 4 2032 Fine-grained, sandy dolomite, cream colored with very little chert; some siliceous cement present. Porosity small 4 2037 Dolomite sandy, fine-grained with equal quantity of chert. Little calcite and pyrite 3 2040 Xo. 4 Pennsylvania?! si/stem White shale 5 140 Limestone 15 155 Powers Well — northeast of Decatur Gen. W. K, W. %, SW. %, sec. 1. T. white shale 55 210 /,,- v R2E Red shale 10 220 Brown shale 25 245 Curb elevation— 691 feet White shale 5 250 Feet Feet Brown shale 5 255 Pleistocene system Gritty shale 10 265 Clay 40 40 Black shale 7 272 Cement gravel 25 65 White shale 26 298 Quick sand 20 85 White limestone 19 :!17 Clay and gravel 5 90 Black shale 18 335 Black mud 10 100 White limestone 5 340 Quicksand 15 115 White shale 7 347 Sandy clay 5 120 White shale 13 360 Quicksand 10 130 Black slate 45 405 Black mud 5 135 White shale 35 440 MACON" COUNTY 29 No. -i — Concluded White limestone 10 450 Red shale 20 470 Blue lime 10 480 White shale 10 490 Red shale 7 497 Black shale 21 518 Gray limestone 36 554 White slate 31 585 Black slate 6 591 Coal (No. 5) 5 596 Fire clay 4 600 White slate 20 620 White limestone 1 621 White shale 24 645 Black shale 35 680 Gritty shale 40 720 Black shale 20 740 Gritty shale with salt water 20 760 White sand 40 800 Black shale 2 802 Coal 3 805 Broken sand and water. . . .31 836 Black shale 10 846 White shale 46 892 Gritty shale 144 1036 Broken sand 9 1045 Mississippian system Chester series White limestone 60 1105 Black shale 5 1110 Red shale 10 1120 Gritty shale 10 1130 White shale 20 1150 Gritty shale 10 1160 Slate 10 1170 Sand and salt water 5 1175 Partial log of same well from study of samples Coal 7 809 Shale, light, sandy 5 814 Slate, black 5 819 Limestone 5 824 Sand, shale, coarse 10 831 Shale, light, gritty 5 839 Slate, hard 85 924 Sand, coarse 20 944 Shale, white and black, oily smell 10 954 Shale, dark 5 959 Shale, hard 5 964 Shale, sandy 5 969 Sand 15 984 Sand, brown, little shale... 5 989 Limestone 11 1000 Missing 70 1070 Limestone 40 1 110 No. 5 Lincoln Oil Co. — No. 1 Caroline Powers Ml', cor., SE. Vi, NE. %, sec. 5, T. 16 N., R. 2 E. Curb elevation — 620 feet Driller's log Thickness Feet Pennsylvanian system White slate 79 Lime 10 Blue slate 40 White slate 40 Lime 10 White slate 40 Red shale 15 White slate 20 Black shale, set 10 in. pipe at 385 feet 15 White shale 60 Blue shale 25 Horizon of No. 5 coal White shale 10 Lime (shell) 5 White slate 60 Black slate with little water 15 Brown slate 65 Coal 5 Black shale 5 Lime (shell) . 5 White slate 15 Lime 5 Brown slate 25 Black slate 20 White slate 65 Black slate 15 Lime 5 Brown slate 10 Black slate 65 Mississippian system Upper Mississippian sub-syst Chester series Lime 25 Slate, white 15 Red shale 15 White shale 20 Lime 15 Red rock 40 White slate, set 8 in. pipe at 1055 55 Salt sand 10 Salt sand with lots of water 30 Depth Feet 200 210 250 290 300 340 355 375 390 450 475 485 490 550 565 630 635 640 645 660 665 690 710 775 790 795 805 870 895 910 925 945 960 1000 1055 1065 1095 3(J OIL JX THE DEOATUB A i; I \ No. 5— Concluded Blue lime 25 1765 Elue slate 10 1775 Lower Mississippian sub-system i. :. Lincoln Oil Co. — No. 1 Caroline Powers NW. cor. SE. Yi, XE. %, sec. .7. T. 16 X.. R. 2 E. Curb elevation — 620 feet Partial log based en study of samples Thickness Depth Feet Feet Mississippian system Upper Mississippian subsystem Chester scries Sand, angular, sub-angular and round, clear white 30 1095 Lower Mississippian sub-system Limestone, fine grained, dense white. Sample about 50 per cent sand like above 65 1160 Dolomite, fine grained, dense, black-brown, with fragments of white limestone and rounded, white quartz 40 1200 Limestone, fine grained, dense, gray-brown, with white limestone and clear quartz fragments 11 1211 Limestone, granular, crystalline, gray-hlack and brown. On solu- tion in HC1 leaves thin black laminae which may be carbona- ceous in composition as well as containing considerable argilla- ceous material. Few fragments of white limestone. Quartz grains common 20 1230 Same, but black laminae fewer and very small 85 1315 Limestone, fine grained, bastard limestone and very fine grained gray sandstone. 73 per cent insoluble in HC1 35 1350 Sandstone, very fine, buff calcareous. 98 per cent insoluble in HC1 15 1365 Sandstone, very fine-grained, gray calcareous. 67 per cent insolu- ble in HCI 65 1430 Shale, gray clay, slightly calcareous 170 1600 Dolomite, porous, argillaceous, gray 15 1615 Limestone, white, granular, oolitic (?) 1615 Limestone, granular gray-white with much blue chert. Sample about 70 per cent chert ■ 15 1655 Limestone, granular white with much blue-white chert and a few small, angular, clear sand grains 95 1740 Quartz, clear angular: chert, white, and shale, greenish-gray cal- careous. About equal amounts of each 2~> 1765 MACON COUNTY 31 No. 5 — Concluded Shale, green-gray, calcareous, with fragments of fine grained, dense, white limestone, brown limestone and green-gray calcare- ous shale 10 1775 Limestone, white; shale, dark gray; chert, white; angular clear quartz fragments; green-gray shale 20 per cent insoluble in HC1 10 1785 Shale, greenish-gray ; clay 15 1800 Limestone, pink, purplish, green-gray and white; crystalline lime- stone with chert and green-gray shale fragments. Crinoid stems, fragments common 5 1805 Limestone, dense, fine grained, greenish-gray and buff-white 10 1815 Shale, dark green or siltstone, noncalcareous, no spores 5 1820 Sivectland Creek shale Shale, black, containing Sporangites, commonly the thin walled type; also green shale from above 100 1920 Missing 63 1983 Silurian system Limestone, fine grained, crystalline, white to faint tan tinge. About 50 per cent of sample blue-white, blue-green, and white translu- cent chert. Seme fragments of greenish siltstone 5 1988 Same, but limestone buff colored. Less chert 5 1993 Like the last; 42 per cent insoluble in HC1, dolomitic 5 1998 Dolomite, fine grained, buff colored, with chert fragments; 24 per cent insoluble in HC1 5 2003 Like last with 20 per cent chert, mostly dolomitic 3 2006 Like last, 10 per cent chert 4 2010 Same, less dolomitic 1 2011 Same, chert 40 per cent 4 2015 Same, darker buff, more dolomitic chert, 50 per cent; few angular quartz grains 5 2020 Same, light brown in color, chert 10+ per cent 5 2025 Same, chert 20 per cent 10 2035 Same, chert 5 per cent 5 2040 Same, but gray colored with considerable green-gray dolomite... 5 2045 Dolomite, fine grained, crystalline, green-gray, with only a few fragments of buff dolomite 5 2050 Same, without buff dolomite 10 2060 Seventy-seven feet into Silurian ("Niagara") limestone. Upper 17 feet dry; next 45 feet showed oil, and last 15 feet dry. Made very little bottom water. Best pay between 2020 and 2040 feet. Pay ends at 2045 feet. Top pay 1998 feet. Steel line run before shot showed 124 feet fluid, about 75 feet oil. No. 6 x Shale 655 860 Mississippian system Lincoln Oil and Gas Co.— No. 2 Upper Mississippian sub-system „ Chester series Caroline Poioers farm Lime 15 875 .Sir. V XE. H, sec. 5. T. 16 N., R. Shale, white 15 890 .> E. Lime 13 903 Curb elevation — 631 feet Shale, red 12 915 Shale, white 20 935 Driller's log Lime 5 940 Thickness Depth Shale, red 20 960 Feet Feet Shale, white 60 1020 Pleistocene system Lime 15 1035 Drift 121 121 Shale, green 3 1038 Pcnnsylvanian system Lime, blue, salt water 10 1048 Shale 69 190 Shale, green 12 1060 Lime 15 205 Lime 5 1065 32 OIL IN THE DEOATUK A|;i,a \«i. 6— Concluded Slate, black 5 1070 lame 10 1080 Lower M iss iss ii>p ian s u b-s ys tem Lime, hard 70 1150 Lime 10 1160 Lime, brown 40 1200 Lime, black 25 1225 Lime, gray 55 1280 Lime, blue 75 1355 Lime, yellow 10 1365 Lime 55 1420 Slate, blue 170 1590 Lime, blue 30 1620 Lime 45 1665 Lime, white 75 1740 Lime, blue 20 1760 Slate, white 55 1815 Lime 20 Bweetland Creek shale Shale, brown 149 Silurian system Oil sand 96 Lime, blue 120 Lime and sand, little water 40 Water and oil (?) 5 Lime 55 Lime 85 Ordovician system Maquokcta shale Slate, blue 50 Lime 65 Slate, brown 70 ■■Trenton" formation Rock (Oil show 2625- 2700 230 1835 1984 2080 2200 2240 2245 2300 2385 2435 2500 2570 2800 \<>. 6 Lincoln Oil and Gas Co. — No. 2 Caroline Powers farm SW. %, NE. 1,, .ST,-. .7. T. hi N., R. 2 E. Curb elevation — 631 feet Log based on .study of samples Thickness Feet Pennsylvanian system Limestone, medium to light gray, subcrystalline, some fossil frag- ments noted, either small stems or spines; some pyrite and gray shale and sand grains 15 Missing 660 Mississippian system Chester scries Limestone, medium-gray, subcrystalline, medium grained; a dark gray shale, hard, some greenish shale, some sand and pyrite.. 15 Missing 140 Mixture of fine-grained, angular sandstone and dark and medium- grained shale, some limestone, some red shale, some pyrite. ... 15 Shale, light grayish-green, calcareous, some fine grit 3 Sandstone, fine-grained, angular, some about 1/5 shale like last; some red to purple shale; some limestone fragments 10 Shale, medium-gray, hard, smooth, some pyrite 12 Missing 5 Shale, darker than last, brownish-gray, some limestone, some sand 5 Sandstone, light-gray, fine calcareous, shaly, some dark shale, some pyrite 1" sic. Genevieve, st. Louis-Salem limestone Limestone, light tan-gray, fine grained, dense, a coarsely plicated fossil fragment noted (probably a Spirifcr), some fine angular sand, shale, pyrite and limonite 70 Limestone, mixture of dark tan limestone and white limestone, some sand, shale and pyrite. Some small fragments adhere to some larger ones and are brown, giving the appearance of a lump of brown sugar (oil?) 10 Depth Ft i / 205 865 SSO 1020 1035 1038 1048 1060 1065 1070 1080 1150 1160 MACON COUNTY 33 No. — Concluded Limestone, dark, some tan-gray and some gray, fine-grained, dense, impure, some gray shale 40 1200 Limestone, dark gray, dense, siliceous. Some fossil fragments noted, among them a crinoid stem, occasional shale or chert fragments and sand grains 5 1225 Limestone, medium-gray, fine-to medium-grained, subcrystalline, some darker limestone 55 1280 Limestone, darker than last. Some almost black, some sand.... 75 1355 Osage-Warsa wf formations Sandstone, exceedingly fine, angular sand, brownish gray, some shale and limestone 10 1365 Mixture of shale and gray, subcrystalline limestone, some fine sand 55 1420 Shale, medium gray, smooth hard 170 1590 Limestone, gray, impure, shaly, fine-grained; some darker gray shale 30 1620 Keokuk-Burlington limestone Limestone, light-gray, subcrystalline, about y 2 dark or light chert 45 1665 Limestone, light-gray, subcrystalline, sample about 1/3 chert.... 85 1740 Limestone, light-gray and light-green, subcrystalline limestone, about v 2 gray and pink chert 20 1760 Shale, light-gray, slight greenish cast, calcareous 55 1815 Limestone, light greenish-gray, shaly, some gray shale, some chert. 20 1835 Sweetland Creek shale Shale, hard, dark-gray, smooth; some greenish-gray, some lime- stone and chert fragments 40 1875 Shale, hard, chocolate-brown, containing Sporangites huronensis . . 46 1921 Silurian system Missing 139 2060 Limestone, dark-gray, fine-grained, dense, shaly; some pyrite and shale; some mica 120 2180 Limestone, dark, greenish-gray, shaly and light gray, crystalline limestone 20 2200 Like preceding, some greenish-gray shale 45 2245 Limestone, light-gray, sample has slight green cast, subcrystalline to crystalline; some darker sugary limestone 35 2280 Limestone, light-gray, subcrystalline; some green shale, some chert 25 2300 Missing 15 2315 Like the last, slightly darker 15 2330 Limestone, medium-gray, subcrystalline, medium to coarse grains; some pinkish limestone, some green and gray shale and pyrite. 20 ? 2340 Like preceding, slightly darker; no pink limestone 10 2350 Limestone, tan-gray, subcrystalline; some chert, pyrite and shale, one green speck in the limestone noted 25 2375 Ordovician system Maquoketa shale Shale, medium-gray, hard, smooth, silt shale, some limestone frag- ments 60 2435 Like preceding, about 1/3 limestone 15 2450 Kimmsurick-Plattin ("Trenton" ) Limestone, dolomitic. light, tan-gray, subcrystalline, about ] i of sample is gray shale 130 2280 Like preceding, slightly less shale 25 2605 Limestone, dolomitic, light tan-gray, subcrystalline to crystalline, medium-grained, some gray shale 15 2620 Like preceding, less shale 40 2660 ::i OIL l\ THE DECATUB AREA No. ; Pfeiffer farm — Xo. 3 SE. ',. NW. ',. XE. %, sec. 5, T. 16 A'.. B. 2 E. Curb elevation — 664 feet Thickness Ft. in. Pleistocene system Soil 30 Gravel and sand. . . .120 Pennsylvania?! system Slate 45 Elack shale 20 White limestone ... 32 Black shale 11 White limestone .... 4 White shale 38 White limestone ... 5 White shale 35 White limestone .... 10 Black shale 5 White shale 10 White limestone ... 13 Coal 2 White shale 10 Red rock 4 Brown shale 15 AVhite shale 11 Blue shale 25 White shale 28 Blue limestone 5 White shale 38 Horizon of No. 5 coal Black shale 3 White shale 40 Black slate 2 White shale 3 Brown shale 56 Black shale 65 Sandy shale 25 Black shale 5 Limestone 23 Black shale 3 Limestone 9 Black slate 6 White shale mixed with shells of lime- stone 9 Black shale 14 Blue limestone 9 6 Blue shale 8 6 White shale 6 . . Depth Ft. in. 30 150 195 215 247 258 262 300 305 340 350 355 365 378 3 SO 390 394 409 420 445 473 478 516 519 559 561 564 620 685 710 715 738 741 750 756 765 .. 778 .. 789 6 79S .. 804 .. \'o. 8 Atlantic Oil and das Company Bledsoe form — Xo. t sw. 1,. si-:, i,. sec. 5, r. it; .v.. r. t /•;. Curb elevation— 614.5 feet Thickness Depth /•'/. in. Ft. in. Pleistocene system Soil, soft drilling 12 . . . 12 . . Gravel, soft drilling. . 9 . . . 21 . . Clay, soft drilling 9 ... 30 . . Cement gravel, hard drilling 20 ... 50 Quicksand, filled up in pipe 18 ... 68 Red mud, soft drilling 5 . . . 73 . . Clay, yellow, soft drilling .17 ... 90 . . Ahid, brown, soft drill- ing 15 ... 105 Pennsylvanian system Shale, blue, soft drill- ing 30 Shale, blue 20 Shale, brown 15 Shale, blue 5 Shale, hard 15 Lime, gray, hard. ... 7 Shale, blue, soft 8 Lime, gray. hard. ... 9 Shale, soft 76 Lime, gray, hard. ... 10 Shale, soft 37 Lime, gray, hard. . . . (i Red rock, soft 12 Lime, hard 8 Shale, white, soft. ... 7 Lime, blue, soft 2."> Shale 10 Lime, hard 4 Shale, blue, hard 26 Lime, hard B» Shale, white 1 5 Shale, black or dark. 20 Horizon of Xo. ~i coal Shale, white 35 Lime, hard 3 Shale, blue 7 Shale, white, soft 35 Shale, gray, soft In 135 155 170 IT.". 190 197 205 214 290 300 337 343 355 363 .",7(i 395 105 409 445 460 (SO 5 1 5 .".IN 525 565 •"> 7 -"> MACON COUNTY 35 No. 8 — Concluded Shale, brown 55 . . . 630 Shale, white 5 ... 635 Shale, black, hard... 25 ... 660 Shale, gray, soft 20 ... 680 Shale, black 5 . . . 685 Lime, hard 20 . . . 705 Shale, brown 10 . . . 715 Lime, gray 18 ... 733 Shale, blue 7 ... 740 Shale, gray, hard.... 10 ... 750 Shale, blue, soft 75 ... 825 Shale, black 55 . . . 850 Shale, gray 25 . . . 875 Shale, white 10 . . . 885 Mississippia?i system Upper Mississippian sub-system Chester series Lime 35 ... 920 Red rock 10 . . . 930 Shale, dark 5 . . . 935 Lime, gray 15 ... 950 Shale, gray 15 . . . 965 Lime, hard 5 ... 970 Shale, blue 20 . . . 990 Red rock 5 . . . 995 Lime, hard 5 ... 1000 Red rock 10 ... 1010 Sand water, white... 20 ... 1030 Shale, white 35 ... 1065 Sand water, white... 25 ... 1090 Shale, white 3 ... 1093 Lower Mississippian subsystem Lime, gray 87 ... 1180 Lime, red 10 ... 1190 Lime, blue 35 ... 1225 Lime, brown 25 ... 1250 Lime, blue 10 ... 1260 Lime, brown 5 ... 1265 Lime, gray 17 ... 1287 Slate, blue 3 ... 1290 Lime, gray 30 ... 1320 Coal 2 ... 1322 Lime, gray, sandy... 28 ... 1350 Lime, brown 5 ... 1355 Lime, gray 50 ... 1405 Slate, blue 15 ... 1420 Lime, gray, sandy... 30 ... 1450 Slate, white 57 ... 1507 Lime, gray 13 ... 1520 Slate, gray, sandy.... 20 ... 1540 Lime 10 ... 1550 Slate, gray 75 ... 1625 Lime, white, hard.. 105 ... 1730 Lime, blue, hard 65 ... 1795 Red rock 5 ... 1800 . . Lime, brown, hard... 12 ... 1812 .. Slate, gray, soft 20 ... 1832 .. Lime, gray, hard.... 23 ... 1855 .. Sweetland Creek shale Shale 25 ... 1880 .. Lime, gray 5 ... 1885 . . Shale, brown 103 ... 1988 . . Silurian system Lime 10 ... 1998 . . Producing oil sand... 6 ... 2004 .. Lime, flinty 28 ... 2032 .. Sand, showing oil 30 6 2062 6 No. 9 Well located g% miles 8. and *4 mile East of Pfeiffer well (No. SJ NE. cor. SE. H, SE. %, see. 8, T. 16 N., R. 2 E. Curb elevation — 602 feet Thickness Depth Ft. in. Ft. in. Pleistocene system Soil 20 . . . 20 . . White mud 50 . . . 70 . . Quick sand 15 ... 85 Yellow mud 15 . . . 100 . . Black mud 20 . . . 120 . . White mud 10 . . . 130 . . Blue mud 5 . . . 135 . . Black mud 25 . . . 160 . . Brown mud 10 . . . 170 . . Pennsylvania n system Limestone 5 ... 175 . . Black shale 25 . . . 200 . . Limestone 10 . . . 210 . . White shale 5 . . . 215 . . Brown shale 85 . . . 300 . . White shale 20 . . . 320 . . White limestone .... 15 ... 335 . . Brown shale 15 . . . 350 . . White limestone 10 . . . 360 . . Red rock 9 . . . 369 . . White shale 15 . . . 384 . . Brown shale 16 . . . 400 . . White shale 114 .. . 514 . . Coal (No. 5) 2 ... 516 . . Brown shale 44 . . . 560 . . Gray shale 73 6 633 6 Hard shell 2 ... 635 6 Coal 4 6 640 .. White shale 40 . . . 680 . . Black shale 40 . . . 720 . . ;;.; OIL 1\ THE DECATUR AREA No. in Decatur Coal Company — Shaft No. 1* Sec. 11 f, T. 16 X.. R. 2 E. Curb elevation — 672 feet Thickness Depth Ft. in. Ft. in. Pleistocene system Surficial deposits, consisting of clay, sand, hardpan, and two distinct forest beds 110 6 110 6 Pcnnsylvanian system Shale, argillaceous . . 52 6 163 Shale, bituminous . . 3 . . . 166 Shale, calcareous ... 14 ... 180 Sandstone, marly... 1 ... 181 Shale, calcareous 32 . . . 213 Sandstone, argilla- ceous 5 ... 218 Shale, red 2 ... 220 Limestone, argilla- ceous 8 . . . 228 Shale, brown 7 ... 235 Limestone, argilla- ceous 2 ... 237 . , Shale, calcareous 2 6 239 6 Coal and bituminous shale 2 ... 241 6 Shale, calcareous.... 5 6 247 .. Shale, brown 2 ... 249 . . Sandstone, argilla- ceous 41 8 290 8 Coal 6 291 2 Shale, argillaceous.. 8 6 299 8 Limestone, nodular.. 9 ... 308 8 Shale, calcareous. ... 5 . . . 313 8 Shale, argillaceous.. 10 ... 323 8 Limestone, hard 9 ... 332 8 Shale, argillaceous.. 2 6 335 2 Shale, bituminous... 2 ... 337 2 Shale, argillaceous.. 12 . . . 349 2 Limestone, hard.... 7 6 Limestone, argilla- ceous 16 Shale, black and gray 1 . . Shale, argillaceous. . 3 6 Limestone, argilla- ceous 16 Shale, black and gray 1 . . Shale, argillaceous. . 3 6 Limestone, argilla- ceous 20 6 383 Shale, argillaceous.. 9 ... 392 Sandstone, argilla- ceous 27 6 419 Shale, calcareous 2 ... 421 Shale, bituminous. . . L 6 423 Coal 6 1 429 356 8 358 2 359 2 362 8 358 2 359 2 362 8 Shale, argillaceous, nodular Shale, argillaceous, slaty Limestone, hard, gray soft bituminous. . . argillaceous. . brown calcareous . . . argilla- Shale, Shale, Shale, Shale, Shale, Limestone, ceous Shale, calcareous.... Shale, red, variegated Shale, gray, argilla- ceous Shale, bituminous . . Shale, gray, argilla- ceous Shale, bituminous... Shale, gray, calcare- ous Shale, bituminous... Coal and limestone. . Shale, bituminous... Limestone, soft Shale, argillaceous.. Shale, bituminous... Coal Shale, gray Limestone, argilla- ceous Shale Limestone Coal Shale, blue and gray Sandstone, marly . . . Shale, calcareous. . . . Sandstone Slate, gray Shale, bituminous. . . Coal (No. 5) Fire clay Missing Limestone Coal Missing Limestone Missing Coal Missing Coal Missing Coal Missing Coal Missing Coal Missing Limestone 15 . . 19 .. 17 .. 1 6 1 .. 4 6 . . 6 9 3 2 .. 3 3 18 .. 3 3 1 3 1 6 6 .. 1 .. 1 . . . . 6 1 . . 2 .. 6 9 . . 6 2 10 . . 6 444 3 463 3 480 3 481 9 482 9 487 3 487 9 497 .. 499 .. 502 3 511 3 529 532 533 9 535 3 541 542 543 543 544 546 547 548 548 555 556 558 559 573 575 580 595 601 603 606 608 657 660 662 682 685 720 722 749 750 783 785 805 810 839 840 853 855 in 4 9 3 3 3 3 9 9 * Record of shaft to a depth of 608 feel 9 Inches is taken from Vol. VII, p. 17 of tin- 111. Geological Survey Worthen reports. The remainder of the log repre- sents estimated thickness, s ami depths and should not he considered as accurate. MACOX COUXTY 37 Xo. 11 Decatur Coal Company — Shaft NW. hi, SW. %, sec. J' h T. R. 2 E. Curb elevation — 607 feet Thickness Ft. in. Pleistocene system Soil and loamy clay. 25 . . . Sand and water (flow of 400 gallons per minute) 30 . Clay, blue 4 . Drift wood and soil . . 2 . Sand, green 4 . Sand, gray 6 . Clay, hard blue 9 . Sand and gravel .... 53 . Pennsylvanian system Hardpan 23 . Sandstone 1 C Shale, soft G . Shale, gray and blue sandy 28 . Clay shale 15 . Slate, blue 7 . Fire clay, ferruginous 6 . Conglomerate lime- stone 7 . Slate, brown 10 . Flint stone 2 6 Slate, black 1 Flint rock 2 6 Coal 10 Fire clay 8 Shale, blue sandy... 10 .. Flint stone 3 Clay shale 5 Shale, sandy 21 Slate, black 2 6 Coal 1 . . Fire clay 6 Shale, black and 1 inch of coal 8 1 Fire clay 6 . Shale, black 3 . Limestone, impure . 1 . Shale, brown 8 . Sandstone 1 . Slate, black 4 . Flint stone 11 . Slate, black 12 . Fire clay 4 . Limestone 10 . Slate, black 2 . Fire clay 8 . Clay shale 13 . Sandstone 5 . Flint stone 2 . Slate, blue 8 . So. 2 16 N., Depth Ft. in. 25 55 59 61 65 71 80 133 156 157 6 163 6 191 6 206 6 213 6 219 6 226 6 236 6 239 242 6 243 4 251 4 261 4 264 4 269 9 290 4 292 10 293 10 299 in 307 11 313 11 316 11 317 11 325 11 326 11 330 11 341 11 353 11 357 11 367 11 369 11 377 11 390 11 395 11 397 11 405 11 Shale, clay 31 Sandstone, blue 1 Slate, black 3 Coal 1 Fire clay 6 Shale, sandy 10 Shale, black 33 Slate, hard black ... 5 Coal (local) Fire clay 4 Limestone 11 Shale, black 4 Shale, clay 2 Coal 4 Fire clay 2 Conglomerate stone.. 3 Clay shale, gray and blue 14 Slate, black, and % inch coal 4 Fire clay 4 Sandstone 7 Shale, gray 6 Slate, black 2 Coal 14 Clay shale 6 Coal 2 10 Shale, hard gray ... 8 . . . Limestone 2 6 Bituminous shale and coal 6 Fire clay 4 Sandstone 17 Clay shale 3 Sandstone 13 Clay shale, dark 8 Slate, black 16 Coal (No. 5) 4 6 No. 12 Manufacturers and Consumers Coal Co.— Shaft No. 1* NF. cor., sec. 22, T. 16 N.. B. 2 E. Elevation— 614.78 feet Partial log 436 11 437 11 440 11 442 3 448 3 458 3 491 3 496 3 496 6 500 6 511 6 515 6 517 6 517 10 519 10 522 10 536 10 540 10 544 10 551 10 557 10 559 10 561 2 561 8 564 6 572 6 575 .. 575 579 596 599 612 620 622 626 Thickness Depth Ft. in. Ft. in. Limestone 5 . Coal 8 Limestone 10 . Limestone 8 . Coal 1 6 Limestone 8 . Limestone 15 . Coal 1 6 Fire clay 3 . Coal 1 6 Limestone 3 . Coal 4 2 150 208 250 275 348 408 440 486 6 489 6 491 . 510 . 560 . •Thicknesses and depths are approximate. 38 oil. IN THE DECAT1 i; \i:i. \ Manufac'urers and Consumers Coal Co.— Shaft NO. !*. NE. cor. sec. 22, T. la X.. R. >. !■:. Curl) elevation — 615 feet Partial log Thickness Depth Ft. in. Ft. in. Coal . . 10 240 Coal 12 295 Limestone 10 ... 340 . . Limestone 15 ... 365 . . Coal IS 435 . . Coal 3 495 . . Limestone 10 ... 505 .. Coal 5 ... 560 . . No. 11 Niantic Coal Go. — shaft I.'. T. Id x. r. 1 ir. Curb elevation — 601. 5 feet Thickness Ft. in. Pleistocene system Soil and brown clay. 11 ... Sand and gravel 4 ... Gravelly hard pan... 25 ... Blue hard pan : 10 ... Soft clay 15 ... Gray hard pan 10 ... Soft brown clay 7 ... Pennsylvanian system Limestone 10 . . . Blue flinty rock 2 ... Black slate 3 ... Fire clay 6 ... Limestone 10 ... Blue and gray shale. 7 ... Black shale 1 ... Coal 2 Fire clay 1 ... Nodular limestone . . 5 ... Clay shale 5 ... Soft blue sandstone. . lti ... Gray shale 42 ... Coal 1 3 Fire clay 2 6 Sandstone 10 Cray shale 45 Hard flinty rock 10 Black shale 3 Fire clay 9 Depth Ft. in. 11 . . 15 . . 40 .. 50 .. 65 . . 75 .. 82 .. 92 .. 94 .. 97 .. 103 .. 113 .. 120 .. 121 .. 121 2 122 2 127 2 132 2 148 2 190 2 191 5 193 11 203 11 248 11 258 11 261 11 270 11 Blue and red shales. 15 ... 285 11 Black slate 5 . . . 290 11 Coal 13 292 2 Fire clay 4 6 296 8 Black shale 11 ... 307 8 Coal 2 6 310 2 Clay shale 15 ... 325 2 Black shale 3 ... 328 2 Coal (local) 10 329 . . Fire clay 2 ... 331 Gray shale 14 . . . 345 . . Hard black roc k, (limestone) 1 . . . 346 . . Black slate 3 . . . 349 . . Ccal (Xo. 5) 5 6 354 6 Xo. 17 Kclley well NE. cor.. 8E. ',. XE. y±, see. SO, T. 15 .v.. R. > /•;. Curl) elevation — 692 feet Thickness Depth Feet Feet lii istccene .si/siiin Drift 176 176 Pennsylvanian system Brown shale....' 5'.' 2:::. Black shale 10 245 Blue shale 7 252 Limestone 8 260 White shale 9 269 Sandstone 20 289 Black shale 15 304 Blue shale 11 315 Limestone 5 320 Blue shale 5 325 Limestone 15 340 Black shale 16 356 Limestone 8 364 Blue shale 12 376 White shale 11 387 Brown shale 12 399 Sandstone 5 404 Brown shale 31 435 White shale 25 460 Brown shale 28 488 Limestone 30 522 Blue shale 23 545 Black shale 15 560 Limestone 12 572 Black shale 8 580 Limestone 3 583 Blue shale 18 601 White shale 12 613 Black shale 7 620 Limestone 3 623 Blue shale 37 660 ♦Thicknesses and depths arc approximate. MACOX COUXTY 39 No. IT — Concluded Horizon of Xo. 5 coal Black shale 10 670 White shale 33 703 Blue shale 22 725 Brown shale 50 775 Black shale 8 783 Blue shale 53 836 Limestone 6 842 Brown shale 70 912 Black shale 58 970 Blue shale 52 1022 Black shale 5 1027 Sandstone 30 1057 Blue shale 6 1063 Black shale 10 1073 Blue shale 5 1078 Black shale 12 1090 Mississippian system Chester series Limestone 40 1130 Blue shale 18 1148 Red shale 8 1156 Limestone 2 1 15S White shale 12 1170 Blue shale 13 1183 Limestone 4 1187 Blue shale 51 1238 Red shale 4 1242 Limestone and salt water. 18 1260 White shale 6 1266 Sandstone 37 1303 Red shale and salt water. 5 1308 Xo. IS Blue Mound well XW. cor. XE. 14, SW. 14, sec. 32. T. 15 X.. R. 1 E. Curb elevation— 607 feet Thickness Depth Ft. in. Ft. in. Pleistocene system Clay and sand 18 . . . 18 . Sand 5 . . . 23 . Clay, coarse gravel.. 3 ... 26 . Cemented clay, gravel 5 . . . 31 . Blue clay 22 . . . 53 . Cemented clay, gravel 3 . . . 56 . Clay and sand 14 . . . 70 . Cemented clay, gravel 3 . . . 73 . Boulders and gravel . 2 . . . 75 . Soft clay and shale. 23 . . . 98 . Soft clay 1 . . . 99 . Pennsylvanian system- Black shale 1 . . . 100 . Bone coal 6 100 6 Soft clay and shale.. 10 6 111 . Sand shale 3 ... 114 . Limestone 5 Sandstone 6 Clay shale 9 Clay shale 20 Clay shale 9 . . . Clay shale with hard bands 22 Clay shale 6 Limestone 9 Blue clay shale 1 . . . Black shale 4 Dark blue shale 7 10 Bone 2 Fire clay 5 Bastard limestone . . 7 . . . Blue clay shale 7 Limestone 1 Light clay shale.... 6 .. Sand and limestone mixed with shale.. 5 .., Sandy shale 11 Sandy shale 5 Sand shale 8 . . Sand shale 7 Clay shale 16 Clay shale 10 Black shale 1 Coal 6 Fire clay 16 Clay shale 9 Clay shale with hard bands 17 Clay shale with hard bands 22 Black clay shale. .'. . . 15 Clay shale soft, with cave 12 Red soapstone, soft.. 5 .. Red soapstone, soft.. 3 .. Limestone 4 Clay shale 6 Clay shale 14 Clay shale 6 Clay shale 4 Clay shale 9 . . Dark blue shale 4 8 Coal 2 6 Fire clay 16 Coal 8 Clay shale 13 8 Limestone 4 6 Clay shale 4 3 Coal 3 6 Shale 13 Limestone 4 6 Clay shale 10 Clay shale 7 . . Black shale 3 Coal, clean parting.. 5 3 Fire clay 16 Clay shale 8 3 Clay shale 14 Clay shale 12 119 .. 125 .. 134 . . 154 . . 163 .. 185 .. 191 .. 200 .. 201 .. 205 . . 212 10 213 .. 218 . . 225 .. 232 .. 233 .. 239 .. 244 . . 255 .. 260 .. 268 .. 275 .. 291 . . 301 .. 302 .. 302 6 304 . . 330 .. 350 .. 365 .. 377 .. 382 .. 385 .. 389 .. 395 .. 409 .. 415 .. 419 .. 428 . . 432 8 435 2 436 8 437 4 451 .. 455 6 459 3 463 3 464 6 469 .. 479 .. 486 .. 489 .. 494 3 495 9 504 .. 518 .. 530 .. oil. IN THE I > I < Villi AREA 10 No. 18 — Concluded Black shale 3 . . . 533 . . Coal (No. 5) 18 534 8 Soli crumbly shale.. 3 4 538 .. Clay shale 5 . . . 543 . . Clay shale with hard bands 21 . . . 564 . . Clay shale with hard bands 18 ... 582 Coal 3 6 585 6 Sand clay shale mixed 12 6 598 . , Sand clay shale mixed 2 ... 600 . . Elack sandy shale . . 2 . . . 602 . . Coal 15 603 5 Clay and sandy shale mixed 5 7 608 . . Clay and sandy shale mixed 18 ... 626 Clav shale 13 4 639 4 Coal 12 640 6 Mucky shale 1 G 642 . . Mucky shale 1 . . . 643 . . Hard sandstone .... 9 ... 652 . . Black shale 1 ... 653 . . Coal 3 653 3 Black shale 2 7 655 Coal mixed with sulphur 2 5 658 3 Fire clay 16 659 9 Clay shale 4 3 664 . . Sandstone 4 . . . 668 . . Sandstone and sand shale mixed 15 . . . 683 . . Flowing salt water at 670 . . Clay shale with hard bands 7 6 690 6 Black shale 2 3 692 9 Coal 6 693 3 Clay shale 19 695 . . Clay shale 12 . . . 707 . . Clay shale 3 . . . 710 . . Sandstone t 6 . . . 716 . . Black shale 3 . . . 719 . . Coal 8 719 8 Clay shale 2 4 722 . . Clay shale 14 . . . 736 . . Dark shale 2 ... 738 . . Clay shale 2 . . . 740 . . Coal 2 740 2 Clav shale 1 10 742 . . Coal 6 742 6 Clay shale 3 6 746 . . Dark shale 3 . . . 749 . . Coal and sulphur 8 749 8 Sandstone and sand shale 10 4 760 . . Dark clay shale 2 ... 762 . . Dark clay shale 3 ... 765 .. Black shale 1 ... 772 . . Coal 8 772 8 Clay shale 3 4 776 . . Sandstone 3 . . . 779 Sand shale 10 ... 789 Coal 3 ... 792 Clay shale 1 . . . 793 Sandstone 14 ... 807 Sandstone 11 ... 818 Sand shale and clay shale mixed 6 . . . 823 Clay shale 12 . . . 835 Sandstone 5 ... 840 Sandstone hard 10 ... 850 No. 20 Macon County Oil and Gas Co. John M. Hill farm WW. V NE. i 4 . sec. .?. T. 1.', X.. R. 2 E. Curb elevation — 701 feet Thickness Depth Feet Feet Pleistocene system Drift sand, gravel 1G0 160 Pennsylvanian system White shale 50 210 Blue shale 45 255 Limestone 5 260 White shale 40 300 Blue shale 30 330 Black shale 12 342 White shale 20 362 Limestone 18 380 Sandy brown shale 40 420 White shale 30 450 Blue shale 15 465 Limestone 20 485 White shale 30 515 Blue shale 40 555 Black shale 15 570 Blue shale 20 590 White shale 15 605 Limestone 5 610 White shale 4 614 Limestone 6 620 White shale 30 650 Limestone - 2 652 Coal 4 656 Slate 1 657 White shale 30 687 Horizon of No. ~> coal Black shale 15 702 Blue shale 20 722 White shale 48 770 Brown shale 80 850 Blue shale 80 930 Limestone 3 933 Blue shale 6 939 Black shale 61 1000 MOULTRIE COUNTY 41 Xo. 20 — Concluded Limestone 4 1004 Black shale 56 1060 Gray sandstone and salt water 45 1105 Blue shale 10 1115 Mississippian system Chester series Limestone 8 1123 Blue shale 10 1133 Brown .shale 27 1160 Limestone 2 1162 Brown shale 13 1175 Blue shale 6 1181 Red shale 12 1193 Limestone 2 1195 Red shale 5 1200 Blue shale 18 1218 Limestone 15 1233 Blue shale 5 1238 Red shale 10 1248 Blue shale 5 1253 Sandstone 12 1265 Red shale 5 1270 Blue shale 6 1276 MOULTBIE COUNTY No. 16 Moultrie County Coal Company Lovington well SE. cor., SW. %, NE. %, sec. 27, T. 15 N., R. J E. Elevation, top of shaft— 669.65 feet Thickness Depth Ft. in, Ft. in. Pleistocene system Soil, black 2 ... 2 Clav, yellow 12 . . . 11 Clay, blue 58 . . . 72 Gravel 3 ... 75 Hard clay and gravel 8 . . . 83 Gravel 7 . . . 90 Hard clay and gravel 26 . . . 116 Sand 11 ... 127 Clay, red 5 ... 132 Red clay and gravel 13 . . . 145 Pennsylvanian system Sand rock 4 . . . 149 Sand shale 4 . . . 153 Sand shale, blue 29 . . . 182 Sand shale 2 ... 184 Sandstone 18 7 202 7 Coal 10 203 5 Sandstone 7 204 . . Clay shale 7 . . . 211 . . Sandstone 4 . . . 215 . . Sand shale, blue 14 6 229 6 Shale, dark with sand- stone bands 13 6 243 . . Shale, blue 12 5 255 5 Coal 2 ... 257 5 Sand shale 15 7 273 . . Shale, dark blue 24 8 297 8 Slate, fossiliferous. . 14 299 . . Slate, black 3 6 302 6 Coal 1 . . . 303 6 Clay shale 4 6 308 . . Sandstone, dark 23 . . . 331 . . Shale, fossiliferous.. 1 ... 332 .. Shale, dark blue 18 9 350 9 Coal 3 351 Fire clay 2 ... 353 Clay shale 5 . . . 358 Limestone 5 ... 363 Clay shale 6 . . . 369 Conglomerate 3 . . . 372 Limestone 25 8 397 8 Sand shale, dark 2 4 400 . . Sand shale 11 10 411 10 Coal 3 412 2 Sand shale 3 11 416 1 Shale, blue 9 . .. 425 1 Shale, dark blue 8 3 435 4 Coal 1 435 5 Shale, dark blue 6 5 439 10 Coal 5 440 3 Sand shale, blue 2 10 443 1 Sand shale 5 . . . 448 1 Sandstone 5 ... 453 1 Shale, dark blue 23 10 476 11 Coal 8 477 5 Clay shale 4 6 481 11 Limestone 1 ... 482 11 Shale, blue 2 ... 484 11 Red shale 5 . . . 489 11 Shale, blue 11 6 501 5 Shale, black 6 501 11 Shale, fossiliferous.. 1 11 503 10 Coal 13 505 1 Clay shale 3 10 508 11 Sandstone, shaly 10 . . . 518 11 Sandstone, dark 22 . . . 540 11 Sandstone, white. ... 18 ... 558 11 Sandstone 23 . . . 581 11 Shale, blue 2 6 584 5 Limestone, nodular. . 3 6 587 11 Limestone 5 7 593 6 Shale, black 1 . . . 594 6 Shale, dark blue 10 5 604 11 Clay shale 3 . . . 607 11 Shale, blue 3 . . . 611 . . Sandstone 16 . . . 627 . . Shale, blue 1 . . . 628 . . Shale, dark blue 14 6 642 6 Shale, black 3 2 645 . . Coal 6 646 6 I -J OIL IX THE DEOATUB Ai;i:.\ No. Hi — Concluded Clay shale Sandstone Shale, blue Sandstone Shale, blue Sandstone Sandstone, shale part ings Sand shale, dark. . . . Shale, dark blue Shale, black Coal Clay shale Sand shale, blue. . . . Sand shale Limestone Shale, blue Limestone Shale, dark blue Shale, gray Sandstone Sandstone, dark .... Shale, dark blue Shale, black Shale, blue Shale, dark blue. . . . dark blue. . . . blue in 1 6 12 10 1 8 partings. Shale Shale Coal Shale Coal Limestone, blue Clay shale Slate, black . . . Limestone, blue Slate, black . . . Coal (No. 6)... Sandstone 6 2 11 4 1 o <; 2 4 8 10 8 4 652 656 657 664 657 664 675 est 714 715 716 718 72?, 732 740 741 75 4 756 763 782 801 825 830 840 850 866 873 6 876 8 878 7 879 11 894 .. 900 6 902 . . 911 8 920 . . No. 26 Well near Bethany NE.