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• <br />• <br />06 Aug -06 Rio 77nto Energy America - Colowyo Mine Page 5 of 5 <br />Drill Hole Lithology Summary <br />Drill Hole <br />Easting <br />Northing Collar Total Depth <br />Township <br />Range Section File <br />CHM -05 -11 <br />1,334,187.73 <br />358,970.09 6,908.87 1,183.00 <br />T03N <br />R93W 25 5C <br />Adjusted Depths <br />From <br />To <br />Seam <br />Thickness Lithologic Qualifiers <br />Lithology Type <br />Shade Color <br />1081.30 <br />1081.70 <br />ZZ <br />0.40 <br />coal <br />black <br />1081.70 <br />1085.60 <br />3.90 <br />mudstone <br />grey <br />1085.60 <br />1088.00 <br />N5 <br />2.40 <br />coal <br />black <br />1088.00 <br />1090.30 <br />N7 <br />2.30 <br />coal <br />black <br />1090.30 <br />1097.30 <br />7.00 <br />coal <br />grey <br />1097.30 <br />1098.40 <br />01 <br />1.10 <br />coal <br />black <br />1098.40 <br />1104.30 <br />5.90 <br />mudstone <br />grey <br />1104.30 <br />1105.00 <br />03 <br />0.70 <br />coal <br />black <br />1105.00 <br />1109.20 <br />4.20 <br />mudstone <br />grey <br />1109.20 <br />1110.50 <br />TC <br />1.30 <br />coal <br />black <br />1110.50 <br />1110.50 <br />TCT <br />0.00 <br />1110.50 <br />1180.50 <br />STCM <br />70.00 salt/pepper lam <br />sandstone <br />light gey -wht <br />1180.50 <br />1183.00 <br />2.50 <br />not logged <br />• <br />• <br />06 Aug -06 Rio 77nto Energy America - Colowyo Mine Page 5 of 5 <br />