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riorruArine. Coal rl(,�an at top, bottom 5ea;:-,,j bony:
<br /> m-:1,ilur,-voiatilo bituminous, vt.!rj strongly cokin;, (113 :;cnm). gr!-y
<br /> 3 black, coily, 1,)rally v,!r,, -j,-.ndy; rr.;isnivo, no bedtltng. Con) mined at dutch Creek 41, #3
<br /> 2 (1-3. Wood) and d!, (Pear Crick) mine:) and formv)rly at Coal Basin mine.
<br /> >
<br /> SMULTONE, Miff to white, massive to thin-bedded, locally poorly cross-bedded, usually In
<br /> Conn or largetabu.1,jr Lvr Fine to rrx:!dia- r;jined, feldspathic to quartzitic, containsC 0 ayinnr airinunts of black chart. Upper 5 to 20 feet bleached white on outcrop, fresh surfaces
<br /> nviterial. Ophiomo-phn burrows present in several
<br /> gray due to enclonod coalified plant
<br /> C distinct zones; 6--velorwnent varies from poor to good. Shale parting of varying thickness
<br /> 0 occurs near center of member; it is Fray, sandy, and very similar to the upper portion
<br /> or the Mrinco,,i of which it is I)robnbl.y a tongue. Prominent ledge or cliff foryier.
<br /> Marinn.
<br /> Cu
<br /> SHALE, and 511:1-31'ONF; a few thin sandstones very similar to the'Rollins Sand-
<br /> stone above hear top. Units light to (lark gray, massive to thinly laminated to uhaly.
<br /> Silt.3torie contains very fine feldspathic sand, locally micaceous. Shales cor=orily calcar-
<br /> eous, other units leas so. Calcite veins (probably hydrothermal.) and at least one known
<br /> sulfide vein occur in this formation. Upper 100 feet show locally intexi3o burrowing activ-
<br /> 00
<br /> ILy, with well-pr,--served trails, tubes, etc. Other fossil evidence is rare. Jnoccmmus
<br /> nfid pot3nibly inrdi.wn were; found. Marine.
<br /> 40 mid SJOIXMIF. parting in the,Mancos Shale. Possibly the Cozzatte Yemher of
<br /> YounA (1951;). Griiy, fine.- to very-fine-grained, thin-bedded, feldspathic to lithic, non-
<br /> 0
<br /> calcareous. 'Poorly pre.)nervud fossils In interval near top could not be identified. Con-
<br /> 0 `7 tneta grn(tattonal. Vvirine.
<br /> U
<br /> 0
<br /> SHALE, HUDSTONE, and SILTSTONE, see upper Marcos unit above. Marine.
<br /> Tabular cross-stratification
<br /> '0 feet
<br /> (D
<br /> Troujth cress-stratification
<br /> 5 fret _7 7 Plane bt�ddirw,
<br /> LOphiar:jjrZIL,� burrow 3tructures 0
<br /> O
<br /> �rr- LIncelliint:ou:3 burrow structures IQ
<br /> a A.Cohan. CoalifAed plant natorial T-1764 0
<br /> 0
<br /> rt
<br />
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