| OCR Text |
Show 8 ing order, are time and the Bilk Creek equivalents sandstone, and Todilto of the Curtis formation lithology, environment, 0 limestone, which Great variation in and color of the San Rafael group make correlation of the facies changes of the individual units the most difficult of the Jurassic system The third Colorado, division, the 0 Morrison, has its type section in with the Salt Wash sandstone and sections established in Utaho traced in the field Outcrops many mileso over Brushy Basin shale of the Morrison It. is here can proposed type be readily that the Morrison formation be raised to group status and the members of the Morrison as established at their respective type sections be consider ed formationso subsequent can This proposed pages of this terminology manuscripto be traced outward from its adjoining stateso shall be used in the Deposits type section of the Morrison group in central Colorado to the The Salt Wash sandstone and Brushy Basin shale formations of the Morrison in Colorado, first described in Utah, be traced into western Colorado the axis of the ancestral directly, but lose their Uncompahgre Range thin-bedded, sandstone formation is Peeples formation Siding, Colorado Oklahoma across Swell of Utaho given in the 0 as ror this identity near in central Coloradoo The unit of fresh-water limestones with abundant and ostracods and can algal oogonia reddish mudstones below the Salt Wash yet unnamedo unit, from The writer proposes the name, a type locality at Peeples This formation is traceable from northwestern the state of A detailed Colorado, description appropriate section and westward to the San Rafael of the of this Peeples formation reporto is |
