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Named <br />Rock Units <br />J - -Seam <br />Il —Seam <br />C —Seam <br />F —Seam <br />F —Seam <br />D —Seam <br />B —Seam <br />B— Sandstone <br />Iles Searrr <br />TT <br />Coal <br />Limestone <br />Shale or mudstone <br />Sandy shale <br />C2- <br />a- <br />h <br />0 <br />0 <br />LT) <br />a <br />U <br />ci <br />U) <br />a <br />ro <br />0 <br />s, <br />Ce <br />m <br />0 <br />U <br />a <br />c <br />Fossiliferous <br />Sandstone <br />o1 Conglomerate <br />General Formation Description <br />Wasatch Forrnation — <br />Shales, mudstone, sandstone & conglomerate: <br />Shales often carbonaceous with lenses of coal <br />or conglomerate: sandstones thinly bedded <br />and persistent. <br />Upper Williams Fork Formation <br />Sandstone: thick, fine— grained; interbeds with <br />siltstone and shale; locally thin bedded and <br />carbonaceous with shaley laminae or thin <br />discontinuous coals. <br />Lower Williams Fork formation — <br />Sandstone, siltstone, mudstone an coal; sands <br />fine -- grained, calcareous, lenticular, interbed <br />with siltstones and mudstones; Silts and shales <br />often burrowed and sideritic; Mudstones gray to <br />black, carbonaceous; Coals may be thick and <br />persistent or thin, erratic and discontinuous. <br />Iles Forrnation — <br />Sandstone and siltstone: light to dark gray, <br />sands fine to very fine — grained, calcareous, <br />silty to shaley; Locally carbonaceous or may <br />include thin discontinuous coals. <br />Marcos Shale — <br />Shale; dark gray, marine; interbeds with silts <br />and very fine to medium— grained sandstones; <br />fossiliferous in places. <br />BLUE MOUNTAIN ENERGY, INC. <br />DESERADO MINE RANGELY, COLORADO <br />r <br />Figure 6 -1 <br />Stratigraphic Column <br />Stratcolumn_newest . dwg <br />Scale <br />Not to scale <br />Dace <br />6/4/07 <br />7 <br />