Morrison formation and related deposits in and adjacent to the Colorado Plateau

Abstract

Research Article| August 01, 1944 Morrison formation and related deposits in and adjacent to the Colorado Plateau WILLIAM LEE STOKES WILLIAM LEE STOKES Search for other works by this author on: GSW Google Scholar Author and Article Information WILLIAM LEE STOKES Publisher: Geological Society of America Received: 04 Jun 1942 First Online: 02 Mar 2017 Online Issn: 1943-2674 Print Issn: 0016-7606 © 1944 Geological Society of America GSA Bulletin (1944) 55 (8): 951–992. https://doi.org/10.1130/GSAB-55-951 Article history Received: 04 Jun 1942 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation WILLIAM LEE STOKES; Morrison formation and related deposits in and adjacent to the Colorado Plateau. GSA Bulletin 1944;; 55 (8): 951–992. doi: https://doi.org/10.1130/GSAB-55-951 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract The Morrison formation in and adjacent to the Colorado Plateau currently includes diverse lithic units, many of which cannot properly be included if the limitations of the type section and relationships to other formations are considered. The Todilto limestone, Bluff sandstone, Wanakah marl, Pony Express limestone, and Bilk Creek sandstone can be correlated with the San Rafael group and dated as Upper Jurassic by the marine beds in the group. The Salt Wash sandstone, Brushy Basin shale, Recapture Creek sandstone, and Westwater Creek sandstone are considered equivalent to the type Morrison and have yielded vertebrate remains and are almost certainly Jurassic. Succeeding these are two new formations, the Buckhorn conglomerate and Cedar Mountain shale, which have yielded no fossils but are tentatively classed as Lower Cretaceous, mainly by analogy with similar deposits in adjacent areas.Lithology, distribution, and paleogeography of all units are discussed, and changes in nomenclature and correlation are recommended. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.