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Drill Hole Lithology Summary <br />Drill Hole Easting Northing Collar Total D epth Township Range Section File <br />C -04 -10 1,325,824.59 346,651.48 ' 7,769. 560.00 T03N R94W 3 5A <br />Adjusted Depths <br />From To Seam Thickness Lithologic Qualifiers Lithology Type Shade Color <br />5.00 silty clayey <br />7.00 silty clayey <br />8.00 silty <br />2.00 <br />0.00 <br />4.80 silty <br />1.20 bright <br />7.15 silty <br />0.00 silty <br />6.10 silty <br />0.75 carbonaceous <br />3.55 bright <br />1.05 <br />1.05 soft <br />0.50 <br />1.75 dull <br />1.05 soft <br />4.05 <br />3.00 carbonaceous <br />4.00 <br />4.50 <br />0.50 <br />6.00 silty <br />5.80 interbedded <br />2.00 <br />2.20 silty <br />8.00 <br />47.00 <br />25.15 silty <br />1.75 silty <br />0.90 <br />0.13 <br />2.12 bright <br />0.20 <br />2.90 <br />3.80 <br />6.05 coaly <br />16.00 silty <br />dull <br />sandy <br />iron stained <br />interbedded <br />weathered <br />Rio Tinto Energy America - Colowyo Mine <br />sandstone <br />0.00 <br />5.00 <br />S61 <br />medium <br />5.00 <br />12.00 <br />S61 <br />grey <br />12.00 <br />20.00 <br />grey <br />mudstone <br />20.00 <br />22.00 <br />coal <br />22.00 <br />22.00 <br />OXID <br />grey <br />22.00 <br />26.80 <br />grey <br />mudstone <br />26.80 <br />28.00 <br />131 <br />dark <br />28.00 <br />35.15 <br />black <br />35.15 <br />35.15 <br />black <br />mudstone <br />35.15 <br />41.25 <br />carbonaceous shale <br />dark <br />41.25 <br />42.00 <br />black <br />42.00 <br />45.55 <br />B2 <br />core loss <br />45.55 <br />46.60 <br />B2 <br />dark <br />46.60 <br />47.65 <br />grey <br />47.65 <br />48.15 <br />grey <br />coal <br />48.15 <br />49.90 <br />B3 <br />• <br />49.90 <br />50.95 <br />dark <br />grey <br />50.95 <br />55.00 <br />black <br />sandstone <br />55.00 <br />58.00 <br />sandstone /mudstone <br />58.00 <br />62.00 <br />62.00 <br />66.50 <br />grey <br />mudstone /siltstone <br />66.50 <br />67.00 <br />C3 <br />67.00 <br />73.00 <br />dark <br />brown <br />73.00 <br />78.80 <br />black <br />mudstone <br />78.80 <br />80.80 <br />C5 <br />80.80 <br />83.00 <br />black <br />83.00 <br />91.00 <br />grey <br />sandstone <br />91.00 <br />138.00 <br />SD1 <br />138.00 <br />163.15 <br />163.15 <br />164.90 <br />164.90 <br />165.80 <br />D1 <br />165.80 <br />165.93 <br />D1 <br />165.93 <br />168.05 <br />D1 <br />168.05 <br />168.25 <br />D1 <br />168.25 <br />171.15 <br />D2 <br />171.15 <br />174.95 <br />D2 <br />174.95 <br />181.00 <br />• <br />181.00 <br />197.00 <br />SE2 <br />5.00 silty clayey <br />7.00 silty clayey <br />8.00 silty <br />2.00 <br />0.00 <br />4.80 silty <br />1.20 bright <br />7.15 silty <br />0.00 silty <br />6.10 silty <br />0.75 carbonaceous <br />3.55 bright <br />1.05 <br />1.05 soft <br />0.50 <br />1.75 dull <br />1.05 soft <br />4.05 <br />3.00 carbonaceous <br />4.00 <br />4.50 <br />0.50 <br />6.00 silty <br />5.80 interbedded <br />2.00 <br />2.20 silty <br />8.00 <br />47.00 <br />25.15 silty <br />1.75 silty <br />0.90 <br />0.13 <br />2.12 bright <br />0.20 <br />2.90 <br />3.80 <br />6.05 coaly <br />16.00 silty <br />dull <br />sandy <br />iron stained <br />interbedded <br />weathered <br />Rio Tinto Energy America - Colowyo Mine <br />sandstone <br />dark <br />yellow /br <br />sandstone <br />medium <br />grey <br />mudstone <br />dark <br />grey <br />sandstone <br />light <br />grey <br />mudstone <br />dark <br />grey <br />coal <br />black <br />mudstone <br />dark <br />grey <br />mudstone <br />medium <br />grey <br />mudstone <br />medium <br />grey <br />mudstone <br />dark <br />grey <br />coal <br />black <br />coal <br />black <br />mudstone <br />medium <br />grey <br />carbonaceous shale <br />dark <br />grey <br />coal <br />black <br />mudstone <br />medium <br />grey <br />core loss <br />mudstone <br />dark <br />grey <br />sandstone <br />grey <br />mudstone <br />dark <br />grey <br />coal <br />black <br />mudstone <br />dark <br />grey <br />siltstone /mudstone <br />dark <br />grey <br />coal <br />black <br />sandstone <br />dark <br />yellow /br <br />sandstone /mudstone <br />sandstone <br />mudstone <br />dark <br />grey <br />mudstone /siltstone <br />medium <br />grey <br />coal <br />black <br />tuff /tonstien <br />dark <br />brown <br />coal <br />black <br />mudstone <br />grey <br />weathered coal <br />black <br />coal <br />black <br />mudstone <br />grey <br />sandstone <br />dark <br />yellow /br <br />Page 151 of 1194 <br />