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Drill Hole Lithology Summary <br />• <br />Drill Hole <br />Easting <br />Northing Collar <br />Total Depth <br />Township Range Section File <br />C -04 -13 <br />1,329,533.62 <br />353,997 7,264.21 <br />1,195.60 <br />T04N R94W <br />35 <br />5A <br />Adjusted <br />Depths <br />From <br />To <br />Seam <br />Thickness Lithologic Qualifiers <br />Lithology Type <br />Shade <br />Color <br />0.00 <br />19.00 <br />19.00 silty <br />mudstone <br />medium <br />grey <br />19.00 <br />26.74 <br />7.74 sandy <br />siltstone <br />light <br />grey <br />26.74 <br />27.95 <br />1.21 sandy <br />siltstone <br />light <br />grey <br />27.95 <br />27.95 <br />OXID <br />0.00 <br />27.95 <br />40.00 <br />SY25 <br />12.05 silty <br />sandstone <br />light <br />grey <br />40.00 <br />41.10 <br />Y25 <br />1.10 bright <br />pyritic <br />coal <br />black <br />41.10 <br />41.95 <br />Y25 <br />0.85 bright <br />pyritic <br />coal <br />black <br />41.95 <br />43.65 <br />1.70 silty <br />mudstone <br />medium <br />grey <br />43.65 <br />43.95 <br />0.30 <br />siltstone <br />light <br />grey <br />43.95 <br />50.20 <br />6.25 slightly <br />silty <br />mudstone <br />medium <br />grey <br />50.20 <br />51.80 <br />1.60 <br />silty <br />mudstone /siltstone <br />medium <br />grey <br />51.80 <br />53.10 <br />1.30 slightly <br />carbonaceous <br />mudstone <br />light <br />grey /bro <br />53.10 <br />53.90 <br />0.80 slightly <br />clayey <br />siltstone <br />light <br />grey <br />53.90 <br />54.80 <br />0.90 slightly <br />carbonaceous <br />mudstone <br />medium <br />grey <br />54.80 <br />55.10 <br />0.30 carbonaceous <br />carbonaceous mudston <br />dark <br />grey <br />55.10 <br />55.60 <br />0.50 slightly <br />carbonaceous <br />mudstone <br />medium <br />grey <br />• <br />55.60 <br />57.30 <br />1.70 clayey <br />siltstone <br />light <br />grey <br />57.30 <br />59.55 <br />2.25 slightly <br />silty <br />mudstone <br />medium <br />grey <br />59.55 <br />60.80 <br />1.25 silty <br />mudstone /siltstone <br />light <br />grey <br />60.80 <br />67.20 <br />6.40 interbedded <br />interlaminated <br />siltstone /mudstone <br />light <br />grey <br />67.20 <br />68.15 <br />0.95 interbedded <br />interlaminated <br />sandstone /siltstone <br />light <br />grey <br />68.15 <br />69.80 <br />1.65 sandy <br />siltstone <br />light <br />grey <br />69.80 <br />73.15 <br />3.35 slightly <br />silty <br />sandstone <br />medium <br />grey <br />73.15 <br />75.30 <br />2.15 interbedded <br />interlaminated <br />siltstone /mudstone <br />light <br />grey <br />75.30 <br />77.05 <br />1.75 <br />mudstone <br />medium <br />grey <br />77.05 <br />77.85 <br />Y15 <br />0.80 shaley <br />coal <br />dark <br />grey <br />77.85 <br />82.40 <br />4.55 slightly <br />carbonaceous <br />mudstone <br />medium <br />grey <br />82.40 <br />83.15 <br />0.75 <br />siderite <br />medium <br />brown <br />83.15 <br />84.20 <br />1.05 <br />carbonaceous mudston <br />medium <br />grey <br />84.20 <br />87.75 <br />3.55 slightly <br />carbonaceous <br />mudstone <br />medium <br />grey <br />87.75 <br />88.30 <br />0.55 clayey <br />siltstone <br />medium <br />grey <br />88.30 <br />88.50 <br />0.20 <br />siderite <br />medium <br />brown <br />88.50 <br />90.15 <br />1.65 interbedded <br />interlaminated <br />mudstone /siltstone <br />light <br />grey <br />90.15 <br />90.35 <br />0.20 <br />carbonaceous mudston <br />dark <br />grey /bro <br />90.35 <br />92.25 <br />X3 <br />1.90 bright <br />pyritic <br />coal <br />black <br />92.25 <br />92.70 <br />0.45 <br />carbonaceous mudston <br />dark <br />grey /bro <br />92.70 <br />95.00 <br />2.30 slightly <br />carbonaceous <br />mudstone <br />medium <br />grey <br />95.00 <br />96.55 <br />1.55 silty <br />mudstone /siltstone <br />medium <br />grey <br />Rio Tinto Energy America <br />- Colowyo Mine <br />Page 176 of 1194 <br />