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I 1 1;0� M
<br /> dGRAPHIC
<br /> S E C T R
<br /> gear Creek (no.4) Mine Area, Coal Basin Pitkin ' County Colorado
<br /> _ V{ / v :iANlr;1\1tJh:, . , M!U:iR1Nh:, and ORAL, nonmertne. Not at.rretled in deLall. SnndaLoefra
<br /> f;rnerall•y wteiLv to buff, thin 1>,fdded, a x'Lenaivcly crtir.n-Imwtdevl, medium Lo co.•rr:st" grained.
<br /> r• _� Silt
<br /> - rind mudr;tniwn gray, :ennrly. Curls ,`u:e, dincoutinuuus, Impure. Fns::il's Iimitvd to
<br /> 'O� '^D i � j �♦J ..' ♦! It1nnL renctina,
<br /> to
<br /> COAL, clown, high-volattle-A(?) in rank. Not mined, Underlain by carhonr,eeous mud:+t-ne.
<br /> SANt>`M4E, buff, a•t:toiva t^ modorately bedded, blocky, medium-grained, feldspathic, con-
<br /> Y . ' Li,.Lna grains of Ll:.'K ch-rt. Nome cross-betiding, poorly tif•vrlo}�'d. Upper :'O feet contains
<br /> much plant dehris. Ophiucu:rp'en tubes present; not coon. Marine.
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<br /> SANDSTONE, :,ILTS'It)N-;, MUi1;IVXF, and SHALE, marine. Sandstones buff to F;r+ey, thin to thick-
<br /> locally cross-bedded, fine to medium-grained. Other units sandy. 1 call,,( carbon-
<br /> e nceous, conrtonly ri•.ale. :,nndstones contain locally well.-dEsvel �d Orhiorno qi� tulles. N.
<br /> F. Trace rosin evidence is common in finer srdinu:nts. G-nerally maicrately calcareous. Posi- W
<br /> ---- - tion of contact with norun;,rine ser,tiot below varies over a considerable vertical distance; G
<br /> A p 7 the contact i rr.ational. (D.
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<br /> m _ - H
<br /> COAL, SILTST(WI•;, SIIAL';, and SAN(STONE" normterine. Silt- and snndatones buff to Fray; sand- C7
<br /> iC I r + f . stones fine-graLru•d, poorly cross-b(-Wed. Shale shows som: burrowing activity; oLhftrwise, l
<br /> o units nre unfossiliferous. Coal is mMiurn-volatile bitruninous and strongly coking. Mt}or tv
<br /> coal contains Lmcn a,naly layer near miciuie of ae.+un. This seem wrf,f mined at Dutch Cn:ah P2
<br /> mine. Underlain by co.tly, linonitic sandy siitstone.
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<br /> ! �.r �•. .�.� i.4.1 11STONE, buff, rr,,)9sive to mnderrtely bedded, tabular and trough sets or cross-b,-dding 4
<br /> meant but poorIv ,iet •lotk•d. Mediucn-grained, feldspathie to lithic (locally), iac:ally
<br /> t?irtck rh.cr, in lzthic intervals, llpfFir 5 fie'., se;Pral othftr in-.
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