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Geologic Description for Drill Hole 875E
<br /> Nucla Mine, Montrose County, Colorado
<br /> Hole Number: 875E Associated Wells: GW-N25('vNO 025)
<br /> Date Drilled: 4/21/86 Location: T47N,R16W, SEQ,NEQ
<br /> Drilled By: Alan Chiles Section 36
<br /> Logged By: Gary Wendt Coordinates : 604,152' N
<br /> 1,117,020' E
<br /> Elevation: 5731'
<br /> Depth Increment Description of Strata
<br /> (feet)
<br /> 0.0- 0.4 SOIL, sandy loam, reddish brown, friable, SE/ME
<br /> 0.4- 2.0 SANDSTONE, yellowish brown, hard, VE
<br /> 2.0- 4.0 SANDSTONE, brown, hard and slightly hard, gray
<br /> SHALE, SE/ME
<br /> 4.0- 5.0 SHALE, dark gray, slightly hard, NE
<br /> 5.0- 5.6 SHALE, very dark gray to black, slightly hara,
<br /> carbonaceous, NE
<br /> 5.6- 7.5 COAL, Upper Dakota seam, soft, weathered and
<br /> oxidized, NE
<br /> 7.5- 8.0 SHALE, very dark gray, slightly hard, carbonaceous ,
<br /> NE
<br /> 8.0-11.0 SANDSTONE, light brownish gray, slightly hard to
<br /> hard, NE
<br /> 11.0-16.2 SANDSTONE, light brown, hard, NE
<br /> 16.2-18.4 SHALE, gray to dark gray, slightly hard, NE, powdery
<br /> yellow sulfur stains (Jarosite) in fractures, 50
<br /> percent hard light gray sandstone at 18.1-18.4
<br /> 18.4-25.7 COAL, Lower Dakota seam, gray shale streaks at
<br /> 18.84-18.86, 19.99-20.01 and 19.86-19.94, few (5%)
<br /> dark grayish brown carbonaceous shale lamella at
<br /> 25.6-25.7, NE
<br /> 25.7-25.9 SHALE, gray, soft to slightly hard, NE
<br /> 25.9-28.1 SANDSTONE, light gray, hard, NE
<br /> 6-1-54
<br /> Revised 11/01/86
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