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Drill Hole Lithology Summary <br />Drill Hole <br />Easting <br />Northing Collar <br />Total Depth <br />Township Range Section File <br />C -04 -23 <br />1,329,5 <br />349,007.74 7,37621 <br />887.00 <br />T04N R94W <br />35 <br />5 A <br />Adjusted Depths <br />From <br />To <br />Seam <br />Thickness Lithologic Qualifiers <br />Lith000gy Type <br />Shade <br />Color <br />0.00 <br />5.00 <br />5.00 loamy <br />soil <br />orange -r <br />5.00 <br />12.00 <br />BRN <br />7.00 mudstone <br />clinker /burn <br />red <br />12.00 <br />18.20 <br />BRN <br />6.20 siltstone <br />clinker /burn <br />red <br />18.20 <br />19.20 <br />BRN <br />1.00 <br />burned coal <br />19.20 <br />23.00 <br />BRN <br />3.80 siltstone <br />clinker /burn <br />red <br />23.00 <br />29.00 <br />BRN <br />6.00 mudstone <br />clinker /burn <br />grey <br />29.00 <br />36.00 <br />7.00 <br />carbonaceous mudston <br />dark <br />grey /bro <br />36.00 <br />36.00 <br />OXID <br />0.00 <br />36.00 <br />38.30 <br />2.30 silty <br />burrowed <br />siltstone /mudstone <br />light <br />grey <br />38.30 <br />38.42 <br />0.12 <br />bone <br />black <br />38.42 <br />40.95 <br />D1 <br />2.53 bright <br />blocky <br />coal <br />black <br />40.95 <br />41.05 <br />D1 <br />0.10 hard <br />sandy <br />sandstone /siltstone <br />41.05 <br />48.95 <br />D2 <br />7.90 bright <br />blocky <br />coal <br />black <br />48.95 <br />50.10 <br />1.15 <br />carbonaceous mudston <br />dark <br />grey /bro <br />50.10 <br />51.00 <br />0.90 well cemeneted <br />hard <br />siltstone <br />51.00 <br />63.00 <br />12.00 shaley <br />siltstone /mudstone <br />light <br />grey <br />63.00 <br />67.00 <br />4.00 <br />mudstone <br />medium <br />g <br />67.00 <br />85.00 <br />SE2 <br />18.00 <br />sandstone /siltstone <br />light <br />grey <br />85.00 <br />86.00 <br />SE2 <br />1.00 <br />sandstone /siltstone <br />light <br />grey <br />86.00 <br />86.44 <br />0.44 salt/pepper lam <br />siltstone <br />medium <br />grey <br />86.44 <br />87.44 <br />1.00 <br />mudstone <br />medium <br />grey <br />87.44 <br />88.55 <br />1.11 salt/pepper lam <br />siltstone <br />medium <br />grey <br />88.55 <br />89.10 <br />0.55 <br />mudstone <br />medium <br />grey <br />89.10 <br />94.05 <br />E2 <br />4.95 bright <br />blocky <br />coal <br />black <br />94.05 <br />94.30 <br />0.25 <br />bone <br />94.30 <br />96.24 <br />1.94 <br />carbonaceous mudston <br />dark <br />grey /bro <br />96.24 <br />98.27 <br />2.03 fissile <br />soft <br />mudstone <br />dark <br />grey <br />98.27 <br />101.46 <br />3.19 hard <br />brittle <br />siltstone <br />medium <br />grey <br />101.46 <br />103.33 <br />1.87 <br />mudstone <br />103.33 <br />107.83 <br />F1 <br />4.50 bright <br />blocky <br />coal <br />black <br />107.83 <br />108.60 <br />0.77 <br />carbonaceous mudston <br />dark <br />grey /bro <br />108.60 <br />112.00 <br />3.40 carbonaceous <br />laminated <br />mudstone <br />dark <br />grey <br />112.00 <br />113.00 <br />1.00 bioturbated <br />siltstone <br />medium <br />grey <br />113.00 <br />121.00 <br />8.00 soft <br />clayey <br />mudstone <br />medium <br />grey <br />121.00 <br />127.00 <br />SF5 <br />6.00 <br />sandstone <br />light <br />grey <br />127.00 <br />128.00 <br />SF5 <br />1.00 <br />siltstone <br />medium <br />grey <br />128.00 <br />135.00 <br />SF5 <br />7.00 <br />sandstone <br />light <br />grey <br />• <br />135.00 <br />136.00 <br />SF5 <br />1.00 <br />siltstone <br />medium <br />grey <br />Rio Tinto Energy America - <br />Colowyo Mine <br />Page 283 of 1194 <br />