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Drill Hole Lithology Summary <br />• Drill Hole Easting Northing Collar Total Depth Township Range Section File <br />C -06 -06 1,329,990.21 350,807.64 7,267.71 943.00 T04N R94W 35 5C <br />Adjusted Depths <br />From To Seam Thickness Lithologic Qualifiers Lithology Type Shade Color <br />Rio Tinto Energy America - Colowyo Mine Page 684 of 1194 <br />437.95 <br />438.55 <br />ZZ <br />0.60 <br />coal <br />438.55 <br />439.35 <br />0.80 <br />carbonaceous mudston <br />439.35 <br />443.85 <br />4.50 <br />mudstone <br />medium <br />grey <br />443.85 <br />451.00 <br />7.15 interbedded <br />mudstone /siltstone <br />451.00 <br />456.00 <br />5.00 interbedded <br />sandstone /mudstone <br />456.00 <br />457.20 <br />1.20 <br />siltstone /mudstone <br />457.20 <br />457.95 <br />0.75 <br />sandstone <br />light <br />grey <br />457.95 <br />459.10 <br />1.15 <br />carbonaceous mudston <br />459.10 <br />460.10 <br />1.00 <br />mudstone <br />medium <br />grey <br />460.10 <br />462.55 <br />GC <br />2.45 <br />coal <br />black <br />462.55 <br />465.00 <br />2.45 <br />mudstone <br />465.00 <br />470.00 <br />5.00 interlaminated <br />mudstone /sandstone <br />470.00 <br />495.00 <br />25.00 <br />sandstone <br />light <br />grey <br />495.00 <br />510.10 <br />15.10 interbedded <br />mudstone /sandstone <br />510.10 <br />511.30 <br />H2 <br />1.20 <br />coal <br />511.30 <br />517.00 <br />5.70 <br />mudstone <br />medium <br />grey <br />517.00 <br />520.80 <br />3.80 <br />carbonaceous mudston <br />dark <br />brown <br />520.80 <br />523.40 <br />H4 <br />2.60 <br />coal <br />black <br />523.40 <br />527.00 <br />3.60 <br />mudstone <br />medium <br />grey <br />527.00 <br />549.00 <br />22.00 <br />sandstone <br />light <br />grey <br />549.00 <br />551.50 <br />H6 <br />2.50 <br />coal <br />black <br />551.50 <br />553.70 <br />2.20 <br />carbonaceous mudston <br />553.70 <br />555.00 <br />H8 <br />1.30 <br />coal <br />555.00 <br />567.50 <br />12.50 interlaminated <br />mudstone /siltstone <br />567.50 <br />571.80 <br />4.30 <br />sandstone <br />light <br />grey <br />571.80 <br />572.80 <br />1.00 <br />carbonaceous mudston <br />dark <br />brown <br />572.80 <br />573.90 <br />13 <br />1.10 <br />coal <br />black <br />573.90 <br />575.40 <br />1.50 <br />carbonaceous mudston <br />575.40 <br />580.80 <br />15 <br />5.40 <br />coal <br />black <br />580.80 <br />597.80 <br />17.00 <br />sandstone /mudstone <br />597.80 <br />609.60 <br />11.80 <br />sandstone <br />light <br />grey <br />609.60 <br />612.30 <br />17 <br />2.70 <br />coal <br />black <br />612.30 <br />644.80 <br />32.50 occ ms <br />sandstone <br />light <br />grey <br />644.80 <br />648.30 <br />J2 <br />3.50 <br />coal <br />648.30 <br />666.20 <br />17.90 <br />mudstone /siltstone <br />666.20 <br />668.90 <br />J4 <br />2.70 <br />coal <br />668.90 <br />672.40 <br />J6 <br />3.50 <br />coal <br />• <br />672.40 <br />683.70 <br />11.30 <br />mudstone /siltstone <br />Rio Tinto Energy America - Colowyo Mine Page 684 of 1194 <br />