GEOLOGY OF THE NORTHWESTERN WIND RIVER MOUNTAINS, WYOMING

Abstract

Research Article| June 01, 1946 GEOLOGY OF THE NORTHWESTERN WIND RIVER MOUNTAINS, WYOMING CHARLES LAURENCE BAKER CHARLES LAURENCE BAKER STATE GEOLOGICAL SURVEY, VERMILLION, S. D. Search for other works by this author on: GSW Google Scholar GSA Bulletin (1946) 57 (6): 565–596. https://doi.org/10.1130/0016-7606(1946)57[565:GOTNWR]2.0.CO;2 Article history received: 16 Sep 1941 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 CHARLES LAURENCE BAKER; GEOLOGY OF THE NORTHWESTERN WIND RIVER MOUNTAINS, WYOMING. GSA Bulletin 1946;; 57 (6): 565–596. doi: https://doi.org/10.1130/0016-7606(1946)57[565:GOTNWR]2.0.CO;2 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 high and broad area in the Wind River Mountains exposes pre-Cambrian metamorphics, predominantly gneiss, intruded by acidic and basic rocks. By mid-Cambrian time these were deeply eroded to the widespread peneplain of the interior United States. Paleozoic sediments of Middle and Upper Cambrian, Upper Ordovician, later Devonian, earlier Mississippian, Pennsylvanian, and Permian—the usual northwestern Wyoming section—outcrop in the vicinity of Green River lakes, in the north part of the western flank. Most of the Mesozoic rocks in northernmost Green River Basin are concealed, but Dinwoody, Chugwater, Sundance, Morrison, and Upper Cretaceous are known. Cenozoic deposits occur, but their dating is uncertain.Laramide orogeny produced, in the Paleozoic area, folds, two major westward thrusts, and three minor upthrusts. Faulting is extensive in pre-Cambrian rocks, but the age of most of the faults is unknown.A peneplain, thought to be late Cenozoic, bevels pre-Cambrian and Paleozoic rocks. Subsequently there was stream incision to a maximum depth of 3500 feet during five erosion stages or subcycles. There were apparently at least two Pleistocene glacial epochs, and about 25 glaciers still exist. 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.