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ILLINOIS BASIN COAL RESOURCES ELECTRIC LOG AND SAMPLE STUDY DIAMOND DRILL. co. COUNTY N0.479 MAGNOLIA PETROLEUM CO. 5AST MATHENY NO. I SEC. IO.T.5S..R.SE. FIG. 19.-Comparison of electric log and diamond-drill log of adjacent drill holes in Hamilton County.
HAMILTON COUNTY 99 FIG. 20.- Matheny 1 2 3 4 5 6 7 8 9 1 0 1 1 DRILLING TIME - MINUTES HAMILTON COUNTY MAGNOLIA MATHENY NO I SEC 19. T 5S., R.5E. -One-foot drilling time log of Magnolia- No. 1 drill hole in Hamilton County, 19-5s-5E. and thus differs from most Pennsylvanian limestones. Commonly the underlying stratum is a siltstone or silty shale or even a sandstone. Herrin limestone.-The caprock of No. 6 coal bed is one of the most conspicuous members of the McLeansboro group and is encountered in most drill holes. It is called the Herriqg the Brereton10 (western Illinois) or the Providence1' limestone (southeastern Illinois, Indiana and western Kentucky). It is 2 to 6 feet thick, and drill cuttings consist of fragments of dark gray, bsown or black, finely granular and sparingly fossiliferous limestone. A characteristic small fossil, fragments of which are oc- "Idem. 10 Savage, T. E., Significant breaks and overlaps in the Penncyl.vanian ro-ks of Illinois: Amer. Jour. Sci., 5th Ser.. 101. 14, pp. 307-316, 1921. Glenn. L. C.. The geology and coals of Webster County: Kentucky Geol. Survey, Ser. 6, vol. 5, p. 98, 1922. casionally encountered in drill cuttings, is Fusulina girtyi.12 This limestone is separated from the No. 6 coal bed by black "slate" and gray shale from 1 to 10 feet thick. Herrin (No. 6) coal bed.-The No. 6 coal bed, 5 to 9 feet thick, is the upper member of the Carbondale group and the most commonly recognized key bed of the Pennsylvanian system in southern Illinois. Because it is easily identified and commercially important, the bed has been selected as the datum for mapping Pennsylvanian structure in the southern half of the State. In electric logs the position of the bed is usually indicated by a characteristic pattern1" closely associated with the pattern of the caprock limestone. Hawisburg (iVo. 5) cod bed.-Harrisburg (No. 5) coal bed lies 50 to 120 feet below the bottoni of No. 6 bed. Diamonddrill records generally show 3 to 7 feet of coal in the No. 5 bed, but a few holes near the eastern county line encountered no coal at this position. A caprock is reported only rarely in the logs; when present it is thin. The position of No. 5 coal bed appears in electric logs of rotary-drill holes as a characteristic fairly prominent peak in the normal resistivity curve. ""No. 4" coal bed.-In the coatrol wells black "slate" and coal were usually present at a depth 140 to 200 feet below No. 6 coal bed. In some wells only black "slate" was found at this position. The thickness of the bed is usually recorded in inches, but 3 feet of coal were reported 185 feet below No. 6 coal bed in a drill hole in sec. 19, T . 5 S., R. 5 E. (County No. 479). Diamonddrill holes in the county have not reached this coal bed. Its thickness and position are determined primarily from data supplied by records of control wells and electric logs of other rotary-drill holes. In general the pattern of "No. 4" coal bed has a fairly prominent peak to the right in the normal curve, less prominent, however, than that produced by the Harrisburg (No. 5) coal 12, Dunbar, Carl 0.. and Henbeqt, Lloyd G., Pennsylvanlan Fy111inidea of Illinois: Illinois Geol. Survey Bull. 67. n. 111. 1912. 13 Taylor, E. F., et al., Methods of subsurface study of Pennsylvanian strata encountered in rotary-drill holes: Illinois Geol. Survey Rept. Inv. 93, pp. 15-19, 1944.
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SUBSURFACE GEOLOGY AND COAL RESOURC
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ORGANIZATION STATE OF ILLINOIS HON.
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CONTENTS INTRODUCTION BY GILBERT H
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PAGE Structure of Herrin (No. 6) co
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SUBSURFACE GEOLOGY AND COAL RESOURC
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oi the strata below the lower bench
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INTRODUCTION 13 less than 1000 feet
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INTRODUCTION 15 Grateful acknowledg
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INTRODUCTION TABLE 2.-CONTROL DRILL
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INTRODUCTION i I County Sec. T. R.
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Cumberland County 585 725 731 1130
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Jasper County Siltstone 11 ; black
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Sangamon County Wabash County 467 "
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28 ILLINOIS BASIN COAL RESO UKCES t
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30 ILLINOIS BASIN COAL RESOURCES 1
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32 ILLINOIS BASIAT COAL RESOURCES t
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34 ILLINOIS BASIN C09L RESOURCES la
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36 ILLINOIS BASIN COAL RESOURCES gr
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3 5 ILLINOIS BASIN COAL RESOURCES 1
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40 ILLINOIS BASIN COAL RESOURCES be
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42 ILLINOIS BASIAT COAL RESOURCES W
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44 ILLINOIS BASIhT C014L RESOURCES
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46 ILLINOIS BASIN COAL RESOURCES qu
Page 50 and 51: ILLINOIS BASIN COAL RESOURCES TABLE
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Page 58 and 59: TABLE 6.-INTERVALS BETWEEN TOP OF N
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Page 98 and 99: SUBSURFACE GEOLOGY OF HAMILTON COUN
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Page 120 and 121: GULF REFINIXG COMPA:
Page 122 and 123: ILLINOIS BASIN COAL RESOURCES Count
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Page 126 and 127: __!L APPENDIX OF TABULATED DATA Abb
Page 128 and 129: Total depth: The total depth of the
Page 130 and 131: , -- .- -- ----- - -- I---]=- Locat
Page 132 and 133: Location of Hole I Twp. 1 Range / S
Page 134 and 135: Location of Hole TABULATED DATA ON
Page 136 and 137: t TABULATED DATA ON KEY BEDS CLAY C
Page 138 and 139: TABULATED DATA ON KEY BEDS CLAY COU
Page 140 and 141: ---- - - - --.-. - - - - - - Twp. L
Page 142 and 143: Location of Hole I County Number --
Page 144 and 145: Location of Hole I Twp. 1 Range Sec
Page 146 and 147: - -- -- - -- *- - -- -- - -. Locati
Page 149 and 150: Location of Hole TABULATED DATA ON
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Location of Hole I Twp. Range 1 Sec
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Location of Hole County Number TABU
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TABULATED DATA ON KEY BEDS CLAY COU
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TW~. I Location of Hole -- Range SI
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Location of Hole County Number TY p
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Location of Hole I== TABULATED DATA
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Twp. 1 iiange 1 Sec. TABULATED DATA
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Twp. -- 1N 1N 1N Location of Hole R
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-- TABULATED DATA ON KEY BEDS Locat
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TABULATED DATA ON KEY BEDS EDWARDS
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Location of Hole Twp. Range Sec. Nu
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TABULATED DATA ON KEY BEDS EDWARDS
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Location of Hole I I Twp. Range Sec
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' Location of Hole Twp. Range Sec.
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Location I of I Hole - - -- Twp. Ra
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PENNSYLVANIAN SYSTEM IN ILLINOIS BA
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-- TABULATED DATA ON KEY BEDS -- GA
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TABULATED DATA ON KEY BEDS GALLATIN
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TABULATED DATA ON KEY BEDS I GALLAT
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Location of Hole I L p . Range iec.
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- Twp. Location o Hole Rang< Sec. /
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Location of Hole 1 1 1 Twp. Range S
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-- Location of Hole I F Twp. I Rang
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Twp. Location of Hole I Range Sec.
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TABULATED DATA ON KEY BEDS Location
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Twp. 3 8 Location of Hole TABULATED
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Twp. I TABULATED DATA ON KEY BEDS 0
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TABULATED DATA ON KEY BEDS 10 HAMIL
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Location of Hole I Twp. 1 Range 1 S
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TABULATED DATA ON KEY BEDS HAMILTON
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SYLVANlAM SYSBE A. - - 'aw ek m~c r
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TABULATED DATA ON KEY BEDS HAMILTON
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p-p-ppppp - -- Location of Hole I r
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Location of Hole Twp. Range Sec. TA
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--- -- -- -- - Location of Hole . -
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IAN SYSTEM IN ILLINOiS BASIN
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PENNSYLVANIAN SYSTEM IN lLLlNOlS BA
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I- PENNSYLVANIAN SYSTEM IN ILLINOIS
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1 TIP. Range Sec. . -.-- -- TABULAT
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-f- T I Q Be Q ~n rm O\ - 3 ~ o m+
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NSYLVANIAN SYSTEM IN ILLINOIS BASIN
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2N 2H 1 county TABULATED DATA ON KE
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TABULATED DATA ON KEY BEDS RICHLAND
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Location of Hole Twp. Range Sec. TY
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PENNSYLVANIAN SYSTEM IN ILLlNOlS BA
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Location of Hole - TABULATED DATA O
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'n, (U - ;I Y .- I- L - (U -0 - 2:
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TABULATED DATA ON KEY BEDS Location
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SYSTEM IN /LLINOIS BAS/ - ma now- e
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- - Location I I of Hole TXP. Range
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-. - - --- - - - -- County Number T
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RICHLAND COUNTY 0 9 ot- OV) urn - -
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TABULATED Location of Hole 1 Type I
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