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<br /> MONITOR WELL LITHOLOGIC LOG
<br /> Monitor Well Name GW-I413(WN0013) Geologic Unit Monitored Dakota Coal Underburden
<br /> Drilling Date 06/10/86 Logged By J.S. Dingman
<br /> Geophysically Logged By None Total Depth Drilled (ft) 147.0
<br /> DEPTH (FT) DESCRIPTION AND COMMENTS
<br /> 0 - 1 SILT, sandy, red-brn
<br /> 1 - 3 SILT, sandy, ►ned brn
<br /> 3 - 5 SILT, sandy, it red-brn
<br /> 5 - 21 SANDSTONE, fn grnd, v slty, It brn - yel , med hd
<br /> 21 - 23 SILTSTONE, soft, clayey, It brn
<br /> 23 - 25 CLAYSTONE, soft, white, altered (koalinite; volcanic ash)
<br /> 25 - 29 SANDSTONE, v Fn grnd, and SILTSTONE, intbdd, it brn, soft
<br /> 29 - 34 STLTSTONE and CLAYSTONE, it brn, -intbdd, med hd
<br /> 34 - 41 SILTSTONE, med brn, med hd
<br /> 41 - 74.7 SILTSTONE and SHALE, intbdd, grey-It brn, occ carbonaceous H O @ 74.6
<br /> 74.7 - 77.6 SANDSTONE, It grey
<br /> - 79.2 SMUT (carb. shale) , dk brn - blk
<br /> 79.2 - 81 .0 SHALE, v carbonaceous
<br /> 31 .0 - 82.9 COAL (Upper Dakota)
<br /> 82.9 - 86.0 SANDSTONE, grey
<br /> 86.0 - 89. 1 SHALE, blk
<br /> 89. 1 - 95.0 COAL (Lower Dakota)
<br /> 95.0 - 97.0 SANDSTONE, fn grnd, It grey
<br /> 97 - 98 SANDSTONE, as above, intbdd w/ sltst, dk, hd
<br /> 98 - 99 SILTSTONE:, dk grey, hd
<br /> 99 - 103 SANDSTONE, as 97' -981 , intbdd w/sltst, dk grey, med lid
<br /> w/ increasing % of ss
<br /> 103 - 105 SANDSTONE, fn-med grnd, It grey - med brn, hd
<br /> 105 - 114 SILTSTONE, dk grey - blk, med hd, carbonaceous
<br /> 114 - 119 CLAYSTONE, med grey, soft
<br /> 119 - 120 SHALE, blk, carbonaceous
<br /> 120 - 121 .4 COAL (Nucla)
<br /> D-3 Revised 11/01/86
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