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Hole Number: 870E Associated Wells: None
<br /> Date Drilled: 4/15-16/86 Location: T46N, R15W
<br /> Drilled By: Alan Chiles NEk, NW$, Sec. 6
<br /> Logged By: Gary Wendt Coordinates: N 599,188'
<br /> Elevation: 5703' E 1 ,119,142'
<br /> Depth Increment Description of Strata/Lithologic Unit Designation
<br /> (feet)
<br /> 30.8 - 31.3 SANDSTONE, gray, extremely hard, NE, indurated, Unit 1
<br /> 31 .3 - 31 .5 SANDSTONE, gray with yellowish brown iron stains in fractures,
<br /> hard, NE, Unit 1
<br /> 31 .5 - 34.5 SANDSTONE, light gray, extremely hard, NE, few black organic
<br /> lamella, Unit 1
<br /> 34.5 - 42.5 SANDSTONE, light gray, extremely hard, NE, common gray to dark
<br /> gray lamella, coal streak at 38.19 - 38.21 , fractured at 41.9 -
<br /> 42.7, Unit 1
<br /> 42.5 - 50.1 SHALE, sandy, gray, hard, NE, sandstone at 45.3 - 46.2, fractured
<br /> at 47.6 - 48.0, Unit 1
<br /> 50.1 - 51.7 SANDSTONE, gray, hard, NE, common pyrite nodules, Unit 1
<br /> 51.7 - 52.0 SHALE, black, slightly hard to hard, NE, carbonaceous, common
<br /> pyrite nodules, Unit 1
<br /> 52.0 - 56.8 SANDSTONE, light gray to gray, hard to very hard, NE, common
<br /> pyrite nodules, dark gray shale streaks at 53.3 - 53.7 and 55.1 -
<br /> 55.4, Unit 1
<br /> 56.8 - 58.0 SHALE, dark gray, hard, NE, common pyrite nodules, Unit 2
<br /> 58.0 - 58.9 SHALE, very dark gray, slightly hard, NE, common pyrite nodules,
<br /> Unit 2
<br /> 58.9 - 59.4 SHALE, very dark gray, hard, NE, Unit 2
<br /> 59.4 - 60.0 COAL, upper Dakota seam, Unit 2
<br /> 60.0 - 60.7 SHALE, very dark gray, slightly hard to hard, NE, Unit 2
<br /> 60.7 - 61.0 COAL, upper Dakota seam, Unit 2
<br /> 61.0 - 61 .1 SANDSTONE, brownish gray, very hard, NE, common pyrite nodules,
<br /> Unit 2
<br /> 61 .1 - 61.2 SHALE, very dark gray to black, slightly hard, NE, carbonaceous,
<br /> Unit 2
<br /> 6-1-80 Revised 04/11/88
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