Abstract
Research Article| June 01, 1942 Lower Eo-Triassic stratigraphy, western Wyoming and southeast Idaho NORMAN D. NEWELL; NORMAN D. NEWELL Search for other works by this author on: GSW Google Scholar BERNHARD KUMMEL BERNHARD KUMMEL Search for other works by this author on: GSW Google Scholar GSA Bulletin (1942) 53 (6): 937–996. https://doi.org/10.1130/GSAB-53-937 Article history received: 05 Dec 1941 first online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation NORMAN D. NEWELL, BERNHARD KUMMEL; Lower Eo-Triassic stratigraphy, western Wyoming and southeast Idaho. GSA Bulletin 1942;; 53 (6): 937–996. doi: https://doi.org/10.1130/GSAB-53-937 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 A thickness of from 1000 to 2000 feet of strata in western Wyoming, southeastern Idaho, and southwestern Montana is shown to belong to the Otoceras, and probably to the Genodiscus, zones of the Scythian stage of the Lower Triassic. These strata, herein classified as the Dinwoody and Woodside formations, exhibit marked overlap relations on the underlying Phosphoria formation, indicative of a marked hiatus corresponding to the Permo-Triassic boundary. Unlike current usage in southeastern Idaho the term Woodside is herein employed for unfossiliferous red beds, which apparently grade northeastward into a nonred fossiliferous section similar to the underlying Dinwoody formation. Further work remains to be done in the areas in which the red-beds facies is lacking. The marine invertebrate fauna of the Dinwoody has a marked affinity with the Otoceras fauna from east Greenland, Seis (lower Werfen) fauna of the Alps, and early Triassic faunas from eastern Siberia. 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.
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