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Drill Hole Lithology Summary <br />• Drill Hole Ea sting Northing Collar Total Depth Township Range Section File <br />C -04 -20 1,327,958.35 350,928.28 7 ,46039 85700 T04N R94W 35 5A <br />Adjusted Depths <br />From To Seam Thickness Lithologic Qualifiers Lithology Type Shade Color <br />201.60 <br />203.70 <br />63 <br />2.10 <br />coal <br />black <br />203.70 <br />204.60 <br />0.90 <br />mudstone <br />dark <br />black <br />204.60 <br />209.10 <br />4.50 <br />mudstone <br />medium <br />grey <br />209.10 <br />211.70 <br />2.60 <br />siltstone <br />medium <br />grey <br />211.70 <br />212.15 <br />0.45 <br />sandstone <br />light <br />grey <br />212.15 <br />216.00 <br />3.85 <br />interbedded <br />sandstone /siltstone <br />light <br />grey <br />216.00 <br />218.90 <br />C3 <br />2.90 <br />coal <br />black <br />218.90 <br />219.80 <br />0.90 <br />carbonaceous mudston <br />dark <br />grey /bro <br />219.80 <br />224.10 <br />C5 <br />4.30 <br />coal <br />black <br />224.10 <br />224.80 <br />0.70 <br />carbonaceous <br />mudstone <br />dark <br />grey <br />224.80 <br />225.30 <br />0.50 <br />coal /mudstone <br />dark <br />grey <br />225.30 <br />225.71 <br />0.40 <br />carbonaceous shale <br />dark <br />grey /bro <br />225.71 <br />226.81 <br />1.10 <br />mudstone <br />medium <br />grey <br />226.81 <br />231.13 <br />4.32 <br />mudstone <br />medium <br />grey <br />231.13 <br />236.55 <br />5.42 <br />muddy laminated <br />siltstone <br />medium <br />grey <br />236.55 <br />239.96 <br />3.41 <br />mudstone /siltstone <br />dark <br />grey <br />• <br />239.96 <br />241.87 <br />1.91 <br />silty <br />sandstone /siltstone <br />medium <br />grey <br />241.87 <br />242.12 <br />0.25 <br />sandstone /siltstone <br />medium <br />grey <br />242.12 <br />244.48 <br />2.36 <br />silty laminated <br />mudstone <br />medium <br />grey <br />244.48 <br />247.74 <br />3.26 <br />siltstone <br />medium <br />grey <br />247.74 <br />249.55 <br />1.81 <br />mudstone <br />medium <br />grey <br />249.55 <br />249.99 <br />D1 <br />0.44 <br />bright <br />rashy coal <br />black <br />249.99 <br />251.70 <br />D1 <br />1.71 <br />coal <br />251.70 <br />256.90 <br />D2 <br />5.20 <br />coal <br />256.90 <br />259.20 <br />D2 <br />2.30 <br />boney <br />coal <br />black <br />259.20 <br />260.20 <br />1.00 <br />bone <br />brown <br />260.20 <br />261.51 <br />1.31 <br />mudstone <br />dark <br />grey <br />261.51 <br />268.39 <br />6.88 <br />interbedded <br />siltstone /sandstone <br />light <br />grey <br />268.39 <br />270.82 <br />2.43 <br />silty <br />mudstone /siltstone <br />medium <br />grey <br />270.82 <br />272.03 <br />1.21 <br />mudstone <br />medium <br />grey <br />272.03 <br />273.14 <br />1.11 <br />mudstone <br />medium <br />grey <br />273.14 <br />275.77 <br />2.63 <br />muddy <br />siltstone <br />medium <br />grey <br />275.77 <br />281.94 <br />6.17 <br />sandstone /siltstone <br />light <br />grey <br />281.94 <br />285.89 <br />3.94 <br />muddy <br />siltstone <br />light <br />grey <br />285.89 <br />287.00 <br />1.11 <br />mudstone <br />dark <br />grey <br />287.00 <br />287.20 <br />E2 <br />0.20 <br />bright <br />coal <br />black <br />287.20 <br />292.25 <br />E2 <br />5.05 <br />bright <br />coal <br />black <br />• <br />292.25 <br />292.75 <br />E2 <br />0.50 <br />rashy coal <br />Rio Tinto Energy America - Colowyo Mine <br />Page 249 of 1194 <br />