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0 <br />Rio Tinto Energy America - Colowyo Mine Page 378 of 1194 <br />• <br />Drill Hole Lithology Summary <br />D rill Hole <br />Ea sting <br />Northing Collar Total Depth <br />Township Range Section File <br />C -04 -32 <br />1,331,73690 _. <br />349,874.09 7,519.23 1,041.90 <br />. ._.._ .. <br />T04N R9 4W 36 5B u <br />,... <br />Adjusted Depths <br />....._ <br />From <br />To <br />Seam <br />Thickness Lithologic Qualifiers <br />Lithology Type Shade Color <br />972.70 <br />979.00 <br />6.30 <br />mudstone /siltstone <br />979.00 <br />981.20 <br />A <br />2.20 <br />coal <br />981.20 <br />993.40 <br />12.20 <br />mudstone <br />993.40 <br />995.20 <br />ZZ <br />1.80 <br />coal <br />995.20 <br />1005.40 <br />10.20 <br />mudstone /siltstone <br />1005.40 <br />1017.00 <br />11.60 <br />siltstone /sandstone <br />1017.00 <br />1018.70 <br />K5 <br />1.70 <br />coal <br />1018.70 <br />1024.00 <br />5.30 <br />mudstone <br />1024.00 <br />1026.00 <br />KM <br />2.00 <br />tuff /tonstien <br />1026.00 <br />1028.30 <br />K7 <br />2.30 <br />coal <br />1028.30 <br />1033.00 <br />4.70 <br />mudstone <br />1033.00 <br />1033.90 <br />ZZ <br />0.90 <br />coal <br />1033.90 <br />1037.30 <br />3.40 <br />mudstone <br />1037.30 <br />1041.00 <br />K9 <br />3.70 <br />coal <br />1041.00 <br />1041.90 <br />0.90 <br />mudstone <br />0 <br />Rio Tinto Energy America - Colowyo Mine Page 378 of 1194 <br />