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Drill Hole Lithology Summary <br />- Drill Hole Ea sting Northing Collar Total Depth Township Range Section File <br />C- 05-20 1,330,429.95 345 271 96 7,769.09 860. T03N R94W 2 5B <br />Adjusted Depths <br />From To Seam Thickness Lithologic Qualifiers Lithology Type Shade Color <br />Rio Tinto Energy America - Colowyo Mine Page 527 of 1194 <br />0.00 <br />4.00 <br />4.00 <br />oxidized <br />siltstone <br />4.00 <br />6.50 <br />2.50 <br />sandstone <br />6.50 <br />9.00 <br />2.50 <br />mudstone /siltstone <br />9.00 <br />17.00 <br />8.00 <br />mudstone <br />dark <br />grey <br />17.00 <br />27.00 <br />10.00 <br />mudstone /siltstone <br />light <br />brown <br />27.00 <br />27.00 <br />OXID <br />0.00 <br />27.00 <br />27.40 <br />0.40 <br />coal <br />black <br />27.40 <br />37.00 <br />9.60 <br />carbonaceous mudston <br />dark <br />grey <br />37.00 <br />42.30 <br />5.30 <br />silty <br />mudstone <br />dark <br />grey <br />42.30 <br />43.00 <br />0.70 <br />coal <br />black <br />43.00 <br />45.00 <br />2.00 <br />carbonaceous mudston <br />45.00 <br />53.50 <br />8.50 <br />mudstone /siltstone <br />53.50 <br />55.10 <br />1.60 <br />carbonaceous mudston <br />black <br />55.10 <br />58.20 <br />C3 <br />3.10 <br />coal <br />black <br />58.20 <br />59.80 <br />C5 <br />1.60 <br />coal <br />black <br />59.80 <br />62.20 <br />2.40 <br />burned <br />burned coal <br />• <br />62.20 <br />68.20 <br />6.00 <br />mudstone <br />68.20 <br />88.80 <br />20.60 <br />sandstone <br />light <br />brown <br />88.80 <br />90.30 <br />1.50 <br />carbonaceous mudston <br />dark <br />grey <br />90.30 <br />91.00 <br />C7 <br />0.70 <br />coal <br />black <br />91.00 <br />94.40 <br />3.40 <br />carbonaceous mudston <br />94.40 <br />170.00 <br />BRN <br />75.60 <br />burned <br />clinker /burn <br />170.00 <br />177.00 <br />7.00 <br />carbonaceous mudston <br />black <br />177.00 <br />188.00 <br />11.00 <br />sandy <br />mudstone /siltstone <br />dark <br />grey <br />188.00 <br />194.30 <br />6.30 <br />sandstone <br />brown <br />194.30 <br />196.30 <br />2.00 <br />mudstone <br />196.30 <br />199.00 <br />2.70 <br />sandstone <br />199.00 <br />201.00 <br />2.00 <br />mudstone <br />medium <br />grey <br />201.00 <br />209.00 <br />8.00 <br />sandstone <br />brown <br />209.00 <br />226.40 <br />17.40 <br />interbedded <br />mudstone /sandstone <br />226.40 <br />227.20 <br />F3 <br />0.80 <br />coal <br />black <br />227.20 <br />229.20 <br />2.00 <br />mudstone <br />dark <br />grey <br />229.20 <br />232.60 <br />3.40 <br />sandstone <br />medium <br />grey <br />232.60 <br />235.20 <br />2.60 <br />mudstone <br />235.20 <br />244.00 <br />8.80 <br />sandstone <br />medium <br />grey <br />244.00 <br />248.20 <br />4.20 <br />mudstone <br />dark <br />grey <br />248.20 <br />253.20 <br />5.00 <br />sandstone <br />medium <br />grey <br />• <br />253.20 <br />254.40 <br />1.20 <br />mudstone <br />Rio Tinto Energy America - Colowyo Mine Page 527 of 1194 <br />