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OCCIDENTAL PETROLEUM'S OIL SHAIE OPERATIO~ <br />Volcanic lu(T beds arc conunnn thnnig6 the I'ara~ <br />chute Crock Afrmbcr and some are su((iciently conspicuous <br />L. (non marker bed>. 'I'hc 6c I known marker brd is <br />the A1ahngany bed, a IuIT ucar the Inp of the fllahogmiy <br />Icdgc. Ou the 0X1' laud the pl;r6og:uiy brd is about 10 <br />iu. Iltick. <br />•fhc Uinln Fnnualinn nvrrlirs the I'n rarh utc Crrrk <br />I\lcuthrr of the Grrrn liivct I~onuolion ICas6ion and <br />Ihmncll, 1974) and i~ rompncrd u( Icnlirular sandstonr <br />and sihslone bed. wills some. inlrrbrddrd marl-font.. Thr. <br />base u( the (unnalinn is cnnunnuly placed at the base <br />of lbr` lnwrst smrdst,mc brd ab~rvc the Parach ulc Cn•ck <br />Alcmhcr. "I•hc Uinta Punnalion rcpn•>cnls sli cant laid <br />spud and silt Ilia( encroached on the lake basin ns the <br />Gn•en liivcr lake n•In•aled, •hhr Lrrnratinn on the OXY <br />properly is cnngwsrd ..f rhannrl sand< perlra pv as Ihick <br />as •100 It, best expusrd un Ihr hilUups about ouc-half <br />mi north of Ihr. pilot plant. <br />A small rn~sinnal n•numnl n( a hasah Onw occurs on <br />fallah:m 1'ninl al Ihr r;i>I cud .d IL.: 0X1' prnpr.rly <br />:uul n•prC~rnls Ihr nnrlhri nnu~~l rUrmian of Ibc rxlru~ <br />sivc flow; nn lialllrnu•nl and Gr;md plcsa to the south. <br />137 <br />The oulr.n~p ..f hasah orrur5 a! au rlcval sun uI about <br />5.61 )U (t, appn~aluutlrly 3011 ft lower than the Lighest <br />point on the 11\1' Pruprily, which is also the lopugraphi~ <br />r:Jly bight>t point iu :m an•a ..( about 30 sq mi along <br />Ihr. I'nrucbutc (:n•rk~Rnuu G~rrk dicidc. The Ilow o0 <br />copied a tnpogrgrh iually low an•a duriug I'liucenc time. <br />tit ntrlure.-•fhe axis of Cn'>lal Crock mtticliue bends <br />nurt6 wrsl alnwsl ar rnr.v' Ibc crnlr•r o1 ILc OXY hmd (Fig. <br />al. Dips on Ihr ILuik< of Ihr: nutirlinc arc gentle, an <br />the order n( I'-2°. 'll;r only (nulls certainly known <br />in Ihr. onto ehuw I r~r 2 (t r~( uonnal mueeurent and <br />prnb;ibly n•pn•srnt pr.ucenulrnipuiaucmts slumping and <br />bnmkiug duriug cuwpm'limt u( the ntarlslouc. No map <br />ahlr fauh iug has hrrn ubsrrvrd mt outcrop, hul several <br />(cults have hrrn ob~rrvrd in the mint. <br />A couspirunus stntrtnrc, herein cdlcd the Rile}' Gulch <br />structure, calends from lhr head of liilcy Gulch west <br />arras>s Ihr brad ..f Smith Gulch and lu the head of f)ry <br />Gulch, Ihr Gnl ra•uu:ud wr>t ..( the pilaf plaul (Fig. <br />;i1. On the wrsl side ..f Smil6 Gulch this nlruclure <br />sccnis l.r 6r, a Ihrusl fault at Ibc Inp of the Pnrachule <br />Figure 3. Geologic and structure map of Occidental land in southwest part of Piceance Creek basin, Colorado. <br />