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Drill Hole Lithology Summary <br />Drill Hole Easting Northing Collar Total De Township Range Sect File <br />06- Aug -06 Rio Tinto Energy America - Colowyo Mine Page 1 oj5 <br />CHM -05 -11 <br />1,334,187.73 <br />358,970.09 6,908.87 1,183.00 <br />T03N R93W <br />25 <br />5C <br />• <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 />21.40 <br />21.40 weathered silty <br />sandstone <br />light <br />yellow/br <br />21.40 <br />22.50 <br />Y35 <br />1.10 dull weathered <br />coal <br />black <br />22.50 <br />25.00 <br />2.50 silty <br />sandstone <br />light <br />yellow/br <br />25.00 <br />28.00 <br />3.00 clayey <br />mudstone <br />very dark <br />brown <br />28.00 <br />35.00 <br />7.00 com iron oxides <br />siltstone /sandstone <br />light <br />yellow/br <br />35.00 <br />35.00 <br />OXID <br />0.00 <br />35.00 <br />45.50 <br />10.50 <br />mudstone/siltstone <br />medium /1 <br />grey <br />45.50 <br />46.20 <br />ZZ <br />0.70 moderately brig <br />coal <br />46.20 <br />48.00 <br />1.80 com Iron oxides <br />siltstone /sandstone <br />light <br />yellow /br <br />48.00 <br />59.00 <br />11.00 silty <br />sandstone <br />medium <br />grey <br />59.00 <br />69.00 <br />10.00 <br />mudstone /siltstone <br />medium /I <br />grey <br />69.00 <br />73.00 <br />4.00 silty <br />sandstone <br />medium <br />grey <br />73.00 <br />79.00 <br />6.00 <br />mudstone <br />medium- <br />grey <br />79.00 <br />83.00 <br />4.00 <br />siltstone <br />medium <br />grey <br />83.00 <br />84.60 <br />1.60 <br />mudstone <br />medium- <br />grey <br />84.60 <br />85.10 <br />0.50 <br />carbonaceous mudston <br />very dark <br />brown <br />85.10 <br />88.65 <br />Y25 <br />3.55 moderately brig <br />coal <br />88.65 <br />89.00 <br />0.35 dull <br />shaley coal <br />black <br />89.00 <br />97.00 <br />8.00 brittle <br />mudstone /siltstone <br />medium- <br />grey <br />97.00 <br />130.60 <br />33.60 <br />siltstone/sandstone <br />medium <br />grey <br />130.60 <br />136.03 <br />X3 <br />5.43 moderately brig <br />coal <br />136.03 <br />136.53 <br />0.50 <br />carbonaceous mudston <br />very dark <br />brown <br />136.53 <br />141.53 <br />X4 <br />5.00 moderately brig <br />coal <br />141.53 <br />147.00 <br />5.47 <br />mudstone <br />medium- <br />grey <br />• <br />147.00 <br />149.00 <br />2.00 <br />siltstone <br />medium <br />grey <br />149.00 <br />151.00 <br />2.00 <br />mudstone <br />medium- <br />grey <br />151.00 <br />154.90 <br />3.90 <br />siltstone /sandstone <br />medium <br />grey <br />154.90 <br />155.40 <br />ZZ <br />0.50 moderately brig <br />coal <br />155.40 <br />158.30 <br />2.90 <br />mudstone <br />medium- <br />grey <br />158.30 <br />158.80 <br />ZZ <br />0.50 moderately brig <br />coal <br />158.80 <br />163.00 <br />4.20 <br />mudstone <br />medium- <br />grey <br />163.00 <br />176.00 <br />13.00 <br />sandstone <br />medium <br />grey <br />176.00 <br />181.00 <br />5.00 sandy <br />siltstone <br />medium <br />grey <br />181.00 <br />192.00 <br />11.00 silty <br />mudstone <br />medium- <br />grey <br />192.00 <br />211.00 <br />19.00 <br />siltstone /mudstone <br />medium- <br />grey <br />211.00 <br />223.00 <br />12.00 <br />sandstone <br />medium <br />grey <br />223.00 <br />223.50 <br />A3 <br />0.50 moderately brig <br />coal <br />223.50 <br />224.10 <br />0.60 <br />carbonaceous mudston <br />very dark <br />brown <br />224.10 <br />224.70 <br />ZZ <br />0.60 moderately brig <br />coal <br />224.70 <br />235.00 <br />10.30 <br />mudstone /siltstone <br />medium- <br />grey <br />235.00 <br />236.10 <br />B1 <br />1.10 moderately brig <br />coal <br />236.10 <br />238.20 <br />2.10 clayey <br />mudstone <br />dark <br />grey <br />238.20 <br />240.40 <br />B2 <br />2.20 moderately brig <br />coal <br />240.40 <br />242.30 <br />1.90 <br />mudstone <br />dark <br />grey <br />242.30 <br />242.90 <br />ZZ <br />0.60 moderately brig <br />coal <br />242.90 <br />243.20 <br />0.30 <br />mudstone <br />dark <br />grey <br />243.20 <br />244.90 <br />B3 <br />1.70 <br />coal <br />244.90 <br />252.00 <br />7.10 <br />mudstone <br />dark <br />grey <br />252.00 <br />257.00 <br />5.00 <br />siltstone /sandstone <br />medium <br />grey <br />257.00 <br />276.00 <br />19.00 <br />sandstone <br />medium <br />grey <br />276.00 <br />319.00 <br />43.00 <br />siltstone /sandstone <br />medium <br />grey <br />• <br />319.00 <br />333.10 <br />14.10 <br />siltstone /mudstone <br />med & m <br />grey <br />333.10 <br />334.40 <br />C3 <br />1.30 moderately brig <br />coal <br />06- Aug -06 Rio Tinto Energy America - Colowyo Mine Page 1 oj5 <br />