Amsden formation of the east slope of the Wind River Mountains of Wyoming and its fauna

Abstract

Research Article| January 01, 1918 Amsden formation of the east slope of the Wind River Mountains of Wyoming and its fauna E. B. BRANSON; E. B. BRANSON Search for other works by this author on: GSW Google Scholar D. K. GREGER D. K. GREGER Search for other works by this author on: GSW Google Scholar GSA Bulletin (1918) 29 (1): 309–326. https://doi.org/10.1130/GSAB-29-309 Article history received: 02 Apr 1918 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 E. B. BRANSON, D. K. GREGER; Amsden formation of the east slope of the Wind River Mountains of Wyoming and its fauna. GSA Bulletin 1918;; 29 (1): 309–326. doi: https://doi.org/10.1130/GSAB-29-309 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 Distribution of the AmsdenThe Amsden formation was described by Darton1 in 1904 from its outcrops along the Amsden River on the east slope of the Big Horn Mountains in northern Wyoming. Since then he has described and mapped it along the Wind River Mountains from Circle on the north to south of Dallas on the south, in the Rattlesnake Mountains, and in the Owl Creek Mountains, and Blackwelder writes of its occurrence in southern Montana. According to Blackwelder, "it can be followed with more or less confidence clear across the State (Wyoming) from the Black Hills to Idaho." 2 Only the Amsden of the east slope of the Wind River Mountains from Bull Lake southward is treated in this paper.Age of the AmsdenDarton has called the upper Amsden Pennsylvanian, on the basis of fossils collected from near Leo and Shirley, and the lower part probably Mississippian. Blackwelder3 has found two faunas . . . 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.