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Hole Number: 872E Associated Wells: None
<br /> Date Drilled: 4/17-19/86 Location: T46N, R16W
<br /> Drilled By: Alan Chiles SE$, NE$, Sec. 1
<br /> Logged By: Cary Wendt Coordinates: N 599,251 -
<br /> Elevation: 56721 E 1,116,0081
<br /> Depth Increment Description of Strata/Lithologic Unit Designation
<br /> (feet)
<br /> 100.4 - 103.5 SHALE, gray to dark gray, slightly hard to hard, NE, fractured,
<br /> coal streak at 102.9 - 103.0, sandstone streak at 103.00 -
<br /> 103.05, coal/carbonaceous shale streaks at 103.05 - 103.10 and
<br /> 103.25 - 103.30, Unit 2
<br /> 103.5 - 105.3 SANDSTONE, light gray, hard to very hard, NE, Unit 3
<br /> 105.3 - 107.0 SHALE, sandy, gray, hard, NE, Unit 3
<br /> 107.0 - 110.4 SANDSTONE, light gray, extremely hard, NE, indurated, coarse
<br /> grained, 1% black organic lamella at 109.4 - 109.8, Unit 3
<br /> 110.4 - 110.6 SHALE, very dark gray to black, slightly hard to hard, NE, Unit 4
<br /> 110.6 - 110.8 SANDSTONE, light brownish gray, soft to hard, NE, very fine
<br /> grained, Unit 4
<br /> 110.8 - 112.3 SHALE, sandy (sand content increases with depth), very dark gray
<br /> grading to gray with depth, hard, NE, very fine grained soft
<br /> brownish gray sandstone streak at 111.3 - 111.4, Unit 4
<br /> 112.3 - 118.7 COAL, lower Dakota seam, dark gray very hard shale parting at
<br /> 113.30 - 113.55, very hard light brownish gray sandstone partings
<br /> at 114.50 - 114.60 and 114.65 - 114.70, Unit 5
<br /> 118.7 - 121.1 SANDSTONE, light brownish gray, extremely hard, NE, coarse
<br /> grained, very dark gray to black carbonaceous shale at 118.7 -
<br /> 118.8, hard gray shale at 119.2 - 119.4, Unit 6
<br /> 121.1 - 122.9 SANDSTONE, shaley, light gray to gray, hard, NE, Unit 6
<br /> 122.9 - 124.1 SHALE, very dark gray to black, hard, NE, carbonaceous at 122.9 -
<br /> 123.3 and 124.0 - 124.1, sandy shale at 123.3 - 124.0, Unit 6
<br /> 124.1 - 125.0 SANDSTONE, light brownish gray, extremely hard, NE, Unit 6
<br /> 125.0 TOTAL CORE SAMPLE DEPTH
<br /> Notes: Ground water encountered at 14.6 feet
<br /> 2 inch push core barrel used from 0.0 - 14.0 feet
<br /> 3 inch core barrel with Chris dril bit utilized from 14.0 - 125.0 feet
<br /> NE - noneffervescent, SE - slightly effervescent, ME - moderately effervescent, VE
<br /> - violently effervescent
<br /> 6-1-87 Revised 04/11/88
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