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<br />r. <br />136 <br /> <br />R. T. CHEW, III <br /> <br />Gulch f•1emLer cnmpo~rd of marls6nic Ihm is generally <br />harn:n ~+{ oil. Thr I:anlc^ I:uVc6 C\IcmLrr cmtWins more <br />shale. and less ca rbnnate Ihnu Ihr, m~erlying Parachute <br />Crcck, but in L~~Fan \Vash Ihr inrmbri srrws lu curtain <br />more cnrbanglr. thmt in nlbrr pgrie of tho I'ICCgncn Crcck <br />basin. It is nhnul G(111 {I Ihick. <br />'llic Parachulc Crcck Irtember overlies the Garden <br />Gulch Alrmbcr and, ac in mhcr p:uis of the Piceance <br />Crcck basin, rnntains Ihr oil shale of this area. <br />Ala scelinn nlrasurrd ht~ Ihr author iu Logan Nash <br />in S I/ =Cr. •~F+, 'I'. 7 S., li. 77 \V., the base n( the Para• <br />ebute Creek Mrinbrr is placed at Ilse base of the lowest <br />oil shale inlrn'al more Ihnu about 1 (t 16ick. Lining This <br />perhaps spcrinu~ boundary, only 1H7 fl of Ihimhcddcd <br />marlslm~r. and nil shale tin brhecen Ihr top nl the Carden <br />(:ulrh Member and Ihr C\lahnpanv IrJFc. 'fhc high grade <br />uil shale n( Ihr m'crlt inF MahnFanv IrdHr is 7d It Ibick <br />and undnublydll~ roulain~ all of Ihr oil =bale of more. <br />Iluu, 1 i y;nl'Inn iu ihr :n ra. AL.~cr Iln• (\lahnt;:uiy Irdgc, <br />3(r.5 ft of mailrlrur mns mr;i-urrd b~~ur: rth Ihr hr-t mrdiuno- <br />(;rained sn ndsluur ..1 Ihr ~~crrh iny; Ilinla Formation. Thus, <br />Ihr I~dal nira=un•d Ili irknrs ..{ the Parachulc Crcck Mrnr <br />6.•r here is GlG fl. <br />~.- <br />. ,he hr i ( h <br />CI ii ~ r ri... .~ 1 ~_.~ ~~1 <br />L ~ •. I ff .: ,A 7.. <br />Via. -l .~~~5_~^'~~ _1_ _..4._1-.a, .:-1-'•-Y.~i._. <br />I <br />, <br />Figure 1. Map showing the location of D. A. Shalc- <br />Callahan Trust land hell by Occidental Petroleum Corp. <br />in the southwesS part of the Piceance Creek basin, Colo. <br />,~~=•Fj <br />~-~ <br />1 ~ <br />` . <br />,: <br />~.~i, <br />- , t, <br />Figure 2. Roan Cliffs, east of Smith Gulch, southern Piceance Creek basin, Colo. Tu=Uinta Formation; Tgp= <br />Parachute Creek Mbr., Tgg=Gorden Gulch Mbr., Tgd=Douglas Creek Mbr., all of Green River Formation. <br /> <br />