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o N <br />N <br />Named - ~ °o <br />Rock Units _ _ _ ~ ~ General Formation Description <br />_ S <br />- - ~ a <br />_-_ W <br />- - - F <br />' ~ Upper Williams Fork Formation - <br />= u ~ Sandstone: tblek, flee-grefaed; Snterbeds with <br />- °a siltstoae and shale; looally thin bedded end <br />--- ~ ~ enrboaaceous with ehdey laminae or thin <br />_=_ _ !F diacontlnuoue coals. <br />-- e <br />- a <br />--- a. <br />_ ~ <br />J-Seam - <br />H-Seam - - o <br />-_- - mqp <br />G-Seam =__ o Lower Williams Fork Formation - <br />_ ~. w Sandstone, elltstoae, mudatoae en oonl; needs <br />w Y fine-grained, celcareom, lenticular. interbed <br />F-Seem ___ oo ro with siliatonea and mudetones; Sllte end shales <br />--_ '+ often burrowed end siderltio; Mudatoaee gray to <br />c binek, carbonaceous; Coale may be thick and <br />_ _ o <br />E-Seam _- M perafetent or thin, erratic end dieoontinuoue. <br />• --- ~ a <br />D-Seam ~ ~ <br />--- s W <br />.-- <br />B-Seam E. <br />H-9andatone _ _ _ <br />Ilea Seam <br />- Iles Formation - <br />- - - Saadelona end alltetone: ligh! to dnrk gray, <br />d spade fine to very lice-grained, ce.lcareous, <br />---_ .~+ O silty to sheley; Locally cerbonnceoua or mny <br />--- 4- +7 include thin diacontinuova conk. <br />o <br />_ . _ r <br />o W <br />- - o ~ <br />_ ~ a <br />'-- b Mancos Shale - <br />_ _ _ Shale; deck grey, marine; interbeda with atlta <br />' sad vary fine to medium-grained sandstones; <br />--- foealllferoue in places. <br />--- BLUE MOUNTAIN ENERGY, INC, <br />^E== a ~ DESERADD MINE RANGELY, COLDRADC <br />® T'-T o A <br />-_____ o °' Figure II.B-1 <br />=_° o ~ ~ Stratigraphic Column <br />-_- ~ ~ 1 <br />-_- < ;q 9tretcolumn.dwg <br />• Not to acele m~ 12/91/D2 <br />Permit Renewal #4 (1/2004) II.B-2 <br />_~~. <br />