1988-04-11_PERMIT FILE - C1981008A (6)

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Hole Number: 871E Associated Wells: None Date Drilled: 4/16-17/86 Location: T46N, R15W Drilled By: Alan Chiles NWk, NE$, Sec. 6 Logged By: Gary Wendt Coordinates: N 599,727' Elevation: 5742' E 1,120,9921 Depth Increment Description of Strata/Lithologic Unit Designation (feet) 24.6 - 26.1 SANDSTONE, brown, hard, NE, 1% black organic lamella and reddish brown iron stains, soft to slightly hard brownish gray sandy shale at 25.0 - 25.6 and 26.0 - 26.1 , white precipitate at 25.79 - 25.81 , Unit 1 26.1 - 29.0 SHALE, light gray grading to very dark gray, slightly hard to hard, NE, olive green pyrite stains at 26.8, 27.05 and 28.3, Unit 2 29.0 - 30.0 COAL, upper Dakota seam, high pyrite content, Unit 2 30.0 - 30.3 SHALE, gray, hard, NE, Unit 2 30.3 - 31 .1 COAL, upper Dakota seam and black carbonaceous shale, slightly hard gray shale at 30.9 - 31 .1 , Unit 2 31 .1 - 31 .6 SANDSTONE, light gray, hard, NE, 1-3% black organic lamella, Unit 2 31.6 - 33.2 SHALE, gray, slightly hard to soft, NE, lost increment at 32.0 - 32.6, Unit 2 33.2 - 36.6 SANDSTONE, light gray, hard, NE, orange to reddish brown iron stains at bedding planes and in fractures at 34.0, 34.55, 34.75 - 34.90, 35.2, 35.75 and 36.0 - 36.2, shale streak at 36.3 - 36.4, Unit 3 36.6 - 39.9 SHALE, gray to dark gray, hard, NE, sandy shale at 36.6 - 36.9 and 38.7 - 39.9, carbonaceous at 38.3 - 38.7, Unit 4 39.9 - 44.8 COAL, lower Dakota seam, gray sandy shale parting at 41.35 - 41.55, Unit 5 44.8 - 49.1 SANDSTONE, brownish gray, very hard, indurated, few small pyrite nodules, NE, orange to reddish brown iron stains at 48.75 - 49.10, Unit 6 49.1 - 50.5 SANDSTONE, light gray, hard, NE, common bands of gray shale and organic lamella, black carbonaceous shale at 50.25 - 50.45, Unit 6 50.5 - 56.0 SANDSTONE, light gray, very hard, NE, less than 1% black organic lamella, Unit 6 56.0 TOTAL CORE SAMPLE DEPTH 6-1-83 Revised 04/11/88