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Drill Hole Lithology Summary <br />Total Depth <br />Township Range <br />Section <br />File <br />Drill Hole <br />Easting <br />Northing Collar <br />C -06 -25 <br />1,329,548.31 <br />344,729.42 7,880.67 8 08.00 <br />T03N R94W <br />2 <br />5C <br />Adjusted Depths <br />From <br />To <br />Seam <br />Thickness Lithologic Qualifiers <br />Lithology Type <br />Shade <br />Color <br />399.80 <br />407.10 <br />GB <br />7.30 moderately brig <br />coal <br />407.10 <br />410.00 <br />2.90 clayey <br />mudstone <br />dark <br />brown <br />410.00 <br />441.00 <br />31.00 interbedded <br />siltstone /sandstone <br />medium <br />grey <br />441.00 <br />442.30 <br />1.30 clayey <br />mudstone <br />dark <br />brown <br />442.30 <br />447.50 <br />GC <br />5.20 moderately brig <br />coal <br />447.50 <br />450.80 <br />3.30 <br />mudstone <br />450.80 <br />452.70 <br />HO <br />1.90 <br />coal <br />452.70 <br />455.00 <br />2.30 clayey <br />mudstone <br />dark <br />brown <br />455.00 <br />458.00 <br />3.00 carbonaceous <br />carbonaceous mudston <br />458.00 <br />465.00 <br />7.00 hard <br />mudstone /siltstone <br />medium- <br />grey <br />465.00 <br />473.00 <br />8.00 <br />siltstone /sandstone <br />medium <br />grey <br />473.00 <br />522.00 <br />49.00 silty w/ occ ms lams <br />sandstone <br />medium <br />grey <br />522.00 <br />525.00 <br />3.00 <br />siltstone <br />medium <br />grey <br />525.00 <br />528.00 <br />3.00 <br />sandstone <br />medium <br />grey <br />528.00 <br />535.00 <br />7.00 interbedded <br />siltstone /sandstone <br />medium <br />grey <br />535.00 <br />547.00 <br />12.00 brittle <br />mudstone /siltstone <br />medium- <br />grey <br />• <br />547.00 <br />550.10 <br />3.10 clayey <br />carbonaceous mudston <br />dark <br />brown <br />550.10 <br />557.90 <br />H8 <br />7.80 moderately brig <br />coal <br />557.90 <br />567.00 <br />9.10 clayey <br />mudstone <br />dark <br />brown <br />567.00 <br />581.30 <br />14.30 interbedded <br />sandstone /siltstone <br />medium <br />grey <br />581.30 <br />588.00 <br />13 <br />6.70 moderately brig <br />coal <br />588.00 <br />589.10 <br />1.10 clayey <br />mudstone <br />dark <br />brown <br />589.10 <br />593.60 <br />15 <br />4.50 moderately brig <br />coal <br />593.60 <br />597.00 <br />3.40 clayey <br />mudstone <br />dark <br />brown <br />597.00 <br />629.50 <br />32.50 interbedded <br />siltstone /sandstone <br />medium -1 <br />grey <br />629.50 <br />631.30 <br />1.80 clayey <br />mudstone <br />dark <br />brown <br />631.30 <br />636.20 <br />17 <br />4.90 moderately brig <br />coal <br />636.20 <br />645.00 <br />8.80 silty hard <br />mudstone <br />dark <br />grey <br />645.00 <br />687.00 <br />42.00 interbedded <br />siltstone /sandstone <br />medium -1 <br />grey <br />687.00 <br />687.50 <br />J2 <br />0.50 moderately dull <br />coal <br />687.50 <br />689.30 <br />1.80 <br />mudstone <br />689.30 <br />691.50 <br />J4 <br />2.20 <br />coal <br />691.50 <br />693.50 <br />J6 <br />2.00 <br />coal <br />693.50 <br />703.00 <br />9.50 silty hard <br />mudstone /siltstone <br />medium <br />grey <br />703.00 <br />705.00 <br />J8 <br />2.00 moderately dull <br />coal <br />705.00 <br />721.00 <br />16.00 hard <br />mudstone /siltstone <br />medium- <br />grey <br />721.00 <br />733.00 <br />12.00 massive <br />sandstone <br />medium <br />grey <br />. <br />733.00 <br />734.80 <br />K5 <br />1.80 <br />coal <br />Rio Tinto Energy America - Colowyo Mine <br />Page <br />755 of 1194 <br />