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1 <br /> <br />i <br />Page ~_ of -E_ • <br />MONITOR WELL LITHOLOGIC LOG <br />Monitor Well Name G4l-N23(!JN0023)* Geologic Unit Monitored Overburden, Dakota Coal <br />Drilling Date 04/20/86 Logged By G. Wendt ~3nd Underburden _' <br />Geophysically Logged By~lone Total Depth Drilled (ft)_lt p __ <br />*Exploration Hole 873-E <br />DEPTH (FT) DESCRIPTION AND COMMENTS <br />0.0 _ A r•~n. cl ightl~ h~rri tn~arri OF <br />1.Q _ r hard, '~-1(1 nPrrpnt li{~f' (~;y1ch~rnwn canri- <br /> <br />2.0 - 3.0 SHAL r rsl <br />, NF <br />3.0 - a. 0 . <br />I HS A <br />L E, v eCVS13r1~9r~Y <br />d <br />~s]i9h~1 <br />1'~at' <br />~11= <br /> <br />4.0 <br />- S.0 ~ <br />-. <br />, <br />- <br />- <br />- <br />~ SH <br />ALE <br />, very dark gray to black.carhonararnrc apd cnft hlark rnal- <br /> ~ <br />_ <br />encountered coal a 6 f <br />5.0 - 6.8 COAL Uo er Dakota m <br />6.8 - 8.0 SHALE, grav, slightly hard, light nrav slinfttly.hard sandstone at <br /> . <br />L 7.5 - 8.0 NE <br />8.0 - _ <br />10.0 ; SANDSTONE, light brownish nrav, slightly hard to hard. NE <br />0.0 - 13.0 SANDSTONE, brown, hard to very hard, encountered dark nrav s i fitly <br /> hard shale at 12.9 NE __ <br />3.0 - 14.3 SHALE, ra sli htl hard to hard NE <br />4.3 - 14,6 SHALE, ra silt ellowish broN!n 'to reddish brown, slichl tlv_hard <br /> to hard, hi hl fractured from 14.5 - 14.6, P!E <br />_ <br />_ <br />4.6 - 16.0 _ <br />S1iALE, Dray, slightly hard to hard, .yellow 0.01 foot sulfur deposits <br /> in fractured at 0.1 foot intervals, slightly sandy and lirlht gr~ <br /> at 15.8 - 16.0, r•!hite to clear gypsum cr stals at 15.95 - 16.Q0 NE <br />6.0 - 23.6 COAL, Lower Dakota seam, light gray shale partings at 16.6 -16.9, <br /> 18.0 - 18.1 and 18.]5 - 13.20, Iti~h sulfur content from ]6.0 - 16.6 <br />_ <br />3.G - 24.6 SHALE, gray, sli htl~ hard to hard, fractures occur at 0.1=0.2 <br /> foot intervals, very dark ra cart~onaceous shale at 23.6 - 23.7 L NE <br />4_6 - 27.0 SANDSTONE, light ray, extremely hard, indurated, fractures occur <br /> at 0.5 foot intervals, 3 percent black orrlanic lamella at 25.5 - <br /> <br />7.0 - <br />23.1 27.0, NE . <br />SHALE, gray, slightly hard to hard, fractures occur at 0.2 foot <br />intervals, NE <br />D-~2 Revised 11/01/86 <br />