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~. ~ - ~ ~ • <br />is n.nn~r~, shrl^_. ilarren n~ar'sCOnc .~ also cD::~mcn along •,~ith <br />seine oolitic alurll 1im^ctnne anti ver~.~ minor oil shah. 'the <br />GaTC]'e:^. Gl=1Ci'. ~..-'L^.t`=r =Crils ~ rO1_!l2nt Cra slOrJli;g OUi.CrODS t}lat <br />C3P. be .0.^.='.i5ed Nlth ":'~e O\~arl•.'i'1C Parachut2 CTee}: member it Onl <br />a d1SLaP.Ce. The ^rznciDdl dlffe!-enCe bet'.ceen the t',dO members <br />is the lacy. of carbonate in the Garden Gulch member compared <br />~.oith .he Parachute Cree?: member ~•~hich is Dredominantiy carbonate. <br />The Parachute Creek nember is ccmorised of shale and marlstone <br />and is the oil shale producing unit in the Pittance °asin. <br />Donnell (1961) divides the Parachute Creet: member into three <br />zones; the uocer oil shale zone, a middle barren cone, and a <br />"middle and io:rer oil shale pones" comprising, in essence, a lolaer <br />zone. <br />The highest grade oil shall is in the "tiaho~anp Ledge" in the <br />lower Dart of the upper high-grade zone, and is appro::imately <br />90 ft. thic:c. It is underl,rin by about 100 feet of ,~.edium-Drade <br />oil shale and overlain b_v .about 100 feet of medium-grade oil <br />si~ale. - <br />Thy Unity ;ormation overlies the Parachute Crew}; member and <br />is co Drised of sandstorn~s and some barren marlstones and is <br />recognized in the D.F:. Shalt area as the caps of tha highest <br />hill=. ;, _ine-trained basalt flo~:~ roc}:, an .,rJ51Cn1 remnant <br />of the extensive flo•.;s that cover Battlement and Grand [!eras <br />south of the Colorado Ri~.>er, occurs on P!t. Callahan in the eastern <br />part of t`1D C. P.. Shale area but co!~crs only a fey:: acres. <br /> <br />