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Drill Hole Lithology Summary <br />• Dril H ole E asting N o r thing Collar T otal Depth T Range Section File <br />Rio Tinto Energy America - Colowyo Mine Page 774 of 1194 <br />C -06 -37 <br />�.... .. <br />__ 1,3 26,760.43 <br />342,779.00 7,882.91 660.00 <br />.... <br />T03N R94W <br />�,... ... W <br />11 <br />5C <br />Adjusted Depths <br />........... <br />_ . _, <br />From <br />To <br />Seam <br />Thickness Lithologic Qualifiers <br />Lithology Type <br />Shade <br />Color <br />308.30 <br />309.00 <br />H4 <br />0.70 dull <br />bone <br />grey /blac <br />309.00 <br />314.40 <br />5.40 carby top occ coal lams <br />mudstone <br />dark <br />grey <br />314.40 <br />316.00 <br />H6 <br />1.60 moderately brig <br />coal <br />black <br />316.00 <br />321.70 <br />5.70 coarsening dow <br />mudstone /siltstone <br />grey <br />321.70 <br />322.50 <br />0.80 hard <br />siderite <br />tan <br />322.50 <br />335.00 <br />12.50 occ siderite infl <br />mudstone <br />grey <br />335.00 <br />336.30 <br />1.30 hard <br />siderite <br />tan <br />336.30 <br />344.90 <br />8.60 st lams <br />mudstone <br />grey <br />344.90 <br />351.60 <br />H8 <br />6.70 <br />coal <br />black <br />351.60 <br />353.00 <br />1.40 carbonaceous <br />mudstone <br />dark <br />grey <br />353.00 <br />357.00 <br />13 <br />4.00 moderately brig <br />coal <br />black <br />357.00 <br />365.60 <br />15 <br />8.60 moderately brig <br />coal <br />365.60 <br />369.30 <br />3.70 carbonaceous <br />mudstone <br />dark <br />grey <br />369.30 <br />378.00 <br />17 <br />8.70 moderately brig <br />coal <br />black <br />378.00 <br />380.50 <br />2.50 carbonaceous <br />mudstone <br />dark <br />grey <br />380.50 <br />382.60 <br />ZZ <br />2.10 moderately brig <br />coal <br />• <br />382.60 <br />389.00 <br />6.40 sandy <br />siltstone /mudstone <br />grey <br />389.00 <br />391.00 <br />2.00 hard <br />siderite <br />tan <br />391.00 <br />400.95 <br />9.95 <br />sandstone <br />grey <br />400.95 <br />403.90 <br />J4 <br />2.95 moderately brig <br />coal <br />403.90 <br />412.40 <br />8.50 hard beds <br />mudstone /siltstone <br />medium <br />grey <br />412.40 <br />415.50 <br />J6 <br />3.10 moderately brig <br />coal <br />415.50 <br />419.30 <br />3.80 boney <br />carbonaceous mudston <br />dark <br />brown <br />419.30 <br />425.50 <br />6.20 interbedded <br />siltstone /mudstone <br />grey <br />425.50 <br />429.95 <br />4.45 <br />sandstone <br />grey <br />429.95 <br />431.50 <br />J8 <br />1.55 moderately brig <br />coal <br />431.50 <br />440.80 <br />9.30 silty <br />mudstone /siltstone <br />dark <br />grey <br />440.80 <br />444.10 <br />K3 <br />3.30 moderately brig <br />coal <br />444.10 <br />449.90 <br />5.80 w/ st bands <br />mudstone <br />medium <br />grey <br />449.90 <br />452.50 <br />K5 <br />2.60 moderately brig <br />coal <br />452.50 <br />455.30 <br />2.80 <br />sandstone <br />grey <br />455.30 <br />457.20 <br />KM <br />1.90 <br />tuff /tonstien <br />tan /white <br />457.20 <br />462.00 <br />K7 <br />4.80 moderately brig - moderately dul <br />coal <br />462.00 <br />464.00 <br />K9 <br />2.00 <br />coal <br />464.00 <br />479.00 <br />15.00 <br />siltstone /mudstone <br />medium <br />grey <br />479.00 <br />480.80 <br />1.80 hard <br />siderite <br />tan <br />480.80 <br />492.10 <br />11.30 grading down sandy <br />mudstone /siltstone <br />• <br />492.10 <br />496.80 <br />L3 <br />4.70 <br />coal <br />Rio Tinto Energy America - Colowyo Mine Page 774 of 1194 <br />