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gray to black shales, ar~d coal beds. The formation is <br />• characterized by irregular bedding and rapid lateral changes <br />of lithology. It is of r~ori-mar•ir~e or•igir~. <br />The Menefee For•rnatior~ has a local average thickness of 3UCr <br />feet, thicker~ir~g eastward to 1'~3 feet at the Fl~~r•ida River. <br />The Menefee Forrnatior~ is cor~forrnable with the ur~derlyir~g <br />F~oir~t Lc~~~k_~~_rt Sar~dst~~r~e. <br />Cliff H~~use Sar~dstor~e. 'fhe Cliff House Sandstone is the <br />~_rpper farrnati~=~r~ cif the Mesa Verde Group. It is of rnarir~e <br />~:r•igir~ and composed of ir•regular• t~~ lenticular ledges of <br />hard, fine- to medium-grained calcareous sandstone enclosed <br />ire softer argillacAous sandstone, rn~_rdstor~e, ar~d silty shale. <br />J <br />The Cliff House Sar~dstor~e has a local average thickness of <br />350 feet, thickeriirig slightly westward ar~d thir~r~ing slightly <br />eastward. <br />Lewis Shale. The Lewis Shale has beer. removed 6y erc~sior~ iri <br />the permit area but is exposed fo~_rr miles to the east. It <br />is of rnar-ine pr-igir~ and composed rf dar•I<-gray to black. <br />homogeneous clay shale with scattered cor~creatior~s of dense <br />argillaceous lirnest~~r~e ar~d a few thin seams of bentor~ite ire <br />the upper part. It cor~forrnably overlies the Cliff Ho~_rse <br />Sar~dstorie. Ur~er•~~ded thickness is 18~~5 feet. <br />Str•~_rctur•e. The Hesperus area is characterized by gentle <br />• southerly dips r'ar~gir~g fr•orn S to 7 degrees away from the <br />~. C>4-11 <br />