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

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Hole Number: 881E Associated Wells: None Date Drilled: 8/26-27/87 Location: T46N, R15W Drilled By: Bob Maston NW>k, NWk, Sec. 6 Logged By: Gary Wendt Coordinates: N 599,679' Elevation: 5705' E 1,117,455' Depth Increment Description of Strata/Lithologic Unit Designation (feet) 45.5 - 54.5 SANDSTONE, gray, very hard, NE, soft gray sandy shale streaks at 49.74 - 49.79, 51.50 - 51.54, 52.95 - 53.20, and 54.38 - 54.50, continuous 0.01 foot thick clear gypsum lenses per 0.4 feet of sandstone at 45.5 - 47.8, Unit 1 54.5 - 65.5 SANDSTONE, light gray, very hard, NE, soft gray sandy shale at 65.0 - 65.1, bedding planes at 60.6, 62.45, and 64.0, Unit 1 65.5 - 72.6 SHALE, sandy, light gray to gray, hard, NE, very hard gray sandstone at 68.6 - 69.0, bedding planes at 69.3 and 71.3, Unit 1 72.6 - 74.3 SANDSTONE, light gray, very hard, NE, indurated with no fractures or bedding planes, Unit 1 74.3 - 74.5 COAL, black, soft, Unit 2 74.5 - 74.7 SHALE, black to very dark gray, soft, carbonaceous, NE, slightly hard dark gray shale at 74.6 - 74.7, Unit 2 74.7 - 75.1 SANDSTONE, light gray, hard, NE, Unit 2 75.1 - 75.7 SHALE, sandy, gray, slightly hard, NE, soft dark gray shale at 75.1 - 75.2 and 75.45 - 75.65, Unit 2 75.7 - 78.8 SANDSTONE, light gray, extremely hard, NE, coarse grained, fractured at 76.6 and 77.4, pyrite nodules and black organic lamella at 78.7 - 78.8, Unit 2 78.8 - 79.3 SHALE, slightly sandy, dark gray, soft, NE, Unit 2 79.3 - 80.2 SANDSTONE, gray, hard and very hard, NE, no fractures or bedding planes, Unit 2 80.2 - 82.4 SHALE, dark gray to black, soft to slightly hard, NE, carbonaceous, pyrite nodules and streaks at 80.2 - 80.3 and 80.7 - 80.8, Unit 2 82.4 - 83.6 COAL, upper Dakota seam, soft at 82.4 - 82.5, slightly hard black to very dark gray carbonaceous shale parting at 82.5 - 83.0, Unit 2 6-1-89 Revised 04/11/88