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1., 'Ajll —an s w"1ij:mvwin6iiu uiLmiunuuti an,., -.Lron�,,j.y cur.in
<br /> Coal ce)[Itains t !'-naly layer near midile of wenp. This usom wnj mLmi at 0"6q
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<br /> IN minp. Underlal only, Iijionitic sandy siltstone.
<br /> SkP�STONE, buff, mossivecross-bedding,to moderately, bedded, tabular and trough sets of cross-bedding,
<br /> "feldspathic to lithic (IocnIJy), locally
<br /> ( o = ':"ir'_ �_
<br /> present but poorly drv,�loped. Medium-grained,
<br /> quartzitic; contains black chart in 1-ithic intervals. Upper 5 feet-ana several other in-
<br /> teryn1s contain conlified plant ruaterinl. 2ELiionwrphu tubas well-devnloped where present
<br /> U_ but not coa")n. Contacts are sharp. Marine.
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<br /> SX-05TONE, MUDSTIONE, and 3Hk1,F,, marine. Sandstones burr to gray, moderately to
<br /> well ernan-bedWo (usually in large, shallow trough sets), Me to Other
<br /> 0. Y_ units gray, sandy, rommonly finsle, Some siltstonns show ripple laminations. Gphlomurnh-1
<br /> pre.-sent in a few nandntonna, but not. common. and mudstonep show well-developed WM3,
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<br /> -7 trails, burrows, etc. COMM with notimarins section below Is grad"Imal to erosional
<br /> 0 i.nd varios nomewh:iL I" vorticnl position. Kntirc unit is moderately to strongly calcareous.,
<br /> D4L;ddtny Is generally thin throughout.
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<br /> �� = _
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<br /> LU
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<br /> M norunarine. Saridntonf:q and siltstone s burr to
<br /> I L'n;M'N M 1'G 11)N't and 511AIJ
<br /> gray, smWonow Cine-grnined; soirv: o:;cillation Apple mark-3 and minor crou3-bedliAg i"tJ
<br /> are pro ,nt in lt,oth rook types. GhM3 black, cnrbonnconum, connnnly sandy, OWng L In
<br /> ro:i!iLln r r.crpt for Lwn shell Wentone MON nonr bottom. Sons burrow otructuren are pre-
<br /> 0 r n-:nt but n,-t rormon. QrynLallino lim.stones nour top probably nIFnI i d I n I-in origlit. r
<br /> 03 generally tkAn. Cor!Tiq and Corbiculn form the shell units And occur sparsely in Some
<br /> ';omv7,7; ;alPs nro WyWKIY calcareous. Contact with marine above gradational to
<br /> unronfornuible, with coal seam below vary sharp.
<br /> 0
<br /> X2 Ci)AL and 311.10M, interlayerod, nonmarine. Coal clone at top, bottom scams bony; very
<br /> rrinble; median. volnLile bituminous, very strongly caking (B Scam). SlItstones grny to
<br /> 3 black, cooly, 1-cally very sandy; massivy, no beddLng., Conl mined at Ntch Creek 3
<br /> __2 (L.S. Wood) -ind /h. (Hear Crock) mines and formerly at Coal Basin mine.
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<br /> 5AIMIR)NE, huff to white, massive to thin-bedded, locally poorly cross-bedded, usually in
<br /> W 'C /..V. a, Mw of large tabulnr amts. We to mt-dium-erained, feldspathic to quartzUlo eontabn fl
<br /> 0 minor amounts or bUrick cheat. Up�� 5 to 20 feet bleached white on -outcrop, fresh surfaces 0
<br /> j,rny due to enclosed log ed r.oz,"L j.f 1(!d plant rn%Lori a I. 2EM �3_orrx)roh.n burrows prerient in several
<br /> ro distinct zonen7 Avelopment varies from poor to goal. Shale TwIrtIng, of varying thic4mC15
<br /> OccUrs near cent,-r or mernl�or; It 13 grr;y, sandy, and very q a he-Amil r to t nortion
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