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Drill Hole Lithology Summary <br />• Drill Hole Easting Nort Collar Total Depth Township Range Section File <br />C -06 -09 1,328,462.05 352,603.51 7,3 22.88 1,082 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 694 of 1194 <br />252.00 <br />255.00 <br />3.00 <br />sandstone <br />dark <br />grey <br />255.00 <br />261.10 <br />6.10 <br />mudstone <br />dark <br />grey <br />261.10 <br />266.00 <br />D1 <br />4.90 <br />coal <br />black <br />266.00 <br />271.80 <br />D2 <br />5.80 <br />coal <br />black <br />271.80 <br />273.00 <br />1.20 <br />carbonaceous mudston <br />dark <br />brown <br />273.00 <br />275.80 <br />2.80 <br />mudstone <br />dark <br />grey <br />275.80 <br />294.00 <br />18.20 <br />interbedded <br />sandstone /mudstone <br />294.00 <br />298.00 <br />4.00 <br />sandstone <br />light <br />grey <br />298.00 <br />305.40 <br />7.40 <br />interbedded <br />sandstone /mudstone <br />305.40 <br />310.90 <br />E2 <br />5.50 <br />moderately brig <br />coal <br />black <br />310.90 <br />318.20 <br />7.30 <br />mudstone <br />dark <br />grey <br />318.20 <br />318.60 <br />ZZ <br />0.40 <br />coal <br />black <br />318.60 <br />322.10 <br />3.50 <br />mudstone <br />medium <br />grey <br />322.10 <br />324.90 <br />F1 <br />2.80 <br />coal <br />black <br />324.90 <br />327.00 <br />2.10 <br />mudstone <br />dark <br />grey <br />327.00 <br />331.50 <br />4.50 <br />sandstone <br />light <br />grey <br />• <br />331.50 <br />352.00 <br />20.50 <br />interbedded <br />sandstone /mudstone <br />352.00 <br />354.00 <br />2.00 <br />carbonaceous mudston <br />dark <br />brown <br />354.00 <br />355.80 <br />1.80 <br />mudstone <br />medium- <br />grey <br />355.80 <br />362.80 <br />7.00 <br />mudstone /carb mudston <br />362.80 <br />365.00 <br />2.20 <br />mudstone <br />dark <br />grey <br />365.00 <br />370.00 <br />5.00 <br />carbonaceous mudston <br />dark <br />brown <br />370.00 <br />372.00 <br />2.00 <br />mudstone <br />372.00 <br />386.50 <br />14.50 <br />interbedded occ ms <br />sandstone <br />light <br />grey <br />386.50 <br />388.60 <br />2.10 <br />mudstone <br />dark <br />grey <br />388.60 <br />396.80 <br />8.20 <br />sandstone <br />light <br />grey <br />396.80 <br />408.10 <br />11.30 <br />interbedded <br />mudstone /siltstone <br />408.10 <br />410.10 <br />2.00 <br />carbonaceous mudston <br />dark <br />brown <br />410.10 <br />411.00 <br />F5 <br />0.90 <br />coal <br />black <br />411.00 <br />412.00 <br />F5 <br />1.00 <br />coal /mudstone <br />dark <br />brown <br />412.00 <br />414.80 <br />F6 <br />2.80 <br />coal <br />black <br />414.80 <br />415.40 <br />F6 <br />0.60 <br />coal /mudstone <br />dark <br />grey <br />415.40 <br />416.60 <br />F6 <br />1.20 <br />coal <br />black <br />416.60 <br />422.00 <br />5.40 <br />mudstone <br />dark <br />grey <br />422.00 <br />429.00 <br />7.00 <br />interbedded <br />mudstone /siltstone <br />429.00 <br />440.00 <br />11.00 <br />mudstone /sandstone <br />440.00 <br />464.00 <br />24.00 <br />sandstone <br />light <br />grey <br />• <br />464.00 <br />469.90 <br />5.90 <br />mudstone <br />medium- <br />grey <br />Rio Tinto Energy America - Colowyo Mine Page 694 of 1194 <br />