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Drill Hole Lithology Summary <br />Drill Hole Easting No rthing Collar Total Depth Township Range Section File <br />C -04 -20 ,., <br />1,327,958. <br />............ <br />350 928 28 7 , 460 .39 857 00 <br />T04N R94W <br />35 <br />5A <br />Adjusted Depths <br />From <br />To <br />Seam <br />Thickness Lithologic Qualifiers <br />Lithology Type <br />Shade <br />Color <br />400.44 <br />400.64 <br />SF51- <br />0.20 <br />sandstone /mudstone <br />light <br />grey <br />400.64 <br />404.50 <br />SF5L <br />3.86 <br />sandstone <br />light <br />grey <br />404.50 <br />405.00 <br />F5 <br />0.50 pyritic <br />boney coal <br />black <br />405.00 <br />408.20 <br />F5 <br />3.20 boney <br />coal <br />black <br />408.20 <br />412.25 <br />F6 <br />4.05 <br />coal <br />412.25 <br />412.75 <br />0.50 <br />bone <br />412.75 <br />412.91 <br />0.16 <br />carbonaceous shale <br />dark <br />grey /bro <br />412.91 <br />414.52 <br />1.61 carbonaceous <br />mudstone <br />dark <br />grey /bro <br />414.52 <br />415.18 <br />0.66 <br />mudstone clay rich <br />dark <br />grey <br />415.18 <br />415.98 <br />0.81 <br />mudstone <br />medium <br />grey <br />415.98 <br />416.44 <br />0.45 <br />sandstone <br />light <br />grey <br />416.44 <br />419.16 <br />2.72 silty <br />mudstone <br />medium <br />grey <br />419.16 <br />423.04 <br />3.88 silty <br />mudstone /siltstone <br />medium <br />grey <br />423.04 <br />424.15 <br />1.11 <br />siltstone <br />light <br />grey <br />424.15 <br />424.91 <br />0.76 <br />mudstone clay rich <br />medium <br />grey <br />424.91 <br />427.33 <br />2.42 silty <br />mudstone <br />dark <br />grey <br />427.33 <br />428.69 <br />1.36 <br />mudstone clay rich <br />medium <br />grey <br />428.69 <br />435.71 <br />7.01 silty <br />mudstone <br />dark <br />grey <br />435.71 <br />436.31 <br />0.61 <br />siltstone <br />light <br />grey <br />436.31 <br />436.82 <br />0.50 <br />mudstone <br />medium <br />grey <br />436.82 <br />438.93 <br />2.12 <br />sandstone <br />light <br />grey <br />438.93 <br />439.24 <br />0.30 <br />sandstone /siltstone <br />medium <br />grey <br />439.24 <br />442.57 <br />SF9 <br />3.33 <br />sandstone <br />light <br />grey <br />442.57 <br />455.18 <br />SF9 <br />12.61 <br />sandstone <br />light <br />grey <br />455.18 <br />455.38 <br />0.20 <br />mudstone clay rich <br />dark <br />grey /bro <br />455.38 <br />456.19 <br />0.81 <br />mudstone <br />medium <br />grey <br />456.19 <br />457.60 <br />1.41 silty <br />mudstone /siltstone <br />medium <br />grey <br />457.60 <br />461.94 <br />4.34 <br />mudstone <br />medium <br />grey <br />461.94 <br />462.79 <br />0.86 <br />siltstone <br />medium <br />grey <br />462.79 <br />465.62 <br />2.82 <br />mudstone <br />medium <br />grey <br />465.62 <br />466.78 <br />1.16 <br />carbonaceous mudston <br />dark <br />grey <br />466.78 <br />469.05 <br />2.27 carbonaceous laminated <br />mudstone <br />dark <br />grey <br />469.05 <br />470.75 <br />F9 <br />1.70 bright <br />coal <br />black <br />470.75 <br />470.90 <br />0.15 dull <br />coal /mudstone <br />black <br />470.90 <br />472.80 <br />1.90 <br />mudstone <br />medium <br />grey <br />472.80 <br />475.80 <br />3.00 silty <br />mudstone <br />medium <br />grey <br />475.80 <br />476.70 <br />0.90 <br />mudstone /siltstone <br />medium <br />grey <br />• <br />476.70 <br />482.50 <br />5.80 <br />mudstone <br />medium <br />grey <br />Rio Tinto Energy America - Coiowyo Mine <br />Page 251 of 1194 <br />