Basement thrust sheets in the Clearwater orogenic zone, central Idaho and western Montana

Abstract

Research Article| March 01, 1987 Basement thrust sheets in the Clearwater orogenic zone, central Idaho and western Montana Betty Skipp Betty Skipp 1U.S. Geological Survey, M.S. 913, Denver, Colorado 80225 Search for other works by this author on: GSW Google Scholar Geology (1987) 15 (3): 220–224. https://doi.org/10.1130/0091-7613(1987)15<220:BTSITC>2.0.CO;2 Article history first online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Betty Skipp; Basement thrust sheets in the Clearwater orogenic zone, central Idaho and western Montana. Geology 1987;; 15 (3): 220–224. doi: https://doi.org/10.1130/0091-7613(1987)15<220:BTSITC>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 SocietyGeology Search Advanced Search Abstract The Clearwater orogenic zone in central Idaho and western Montana contains at least two major northeast-directed Cordilleran thrust plates of Early Proterozoic metasedimentary and metaigneous rocks that overrode previously folded Middle Proterozoic rocks of the Belt basin in Cretaceous time. The northeastward migration of the resultant thickened wedge of crustal material combined with Cretaceous subduction along the western continental margin produced a younger northern Bitterroot lobe of the Idaho batholith relative to an older southern Atlanta lobe. Eocene extensional unroofing and erosion of the Bitterroot lobe has exposed the roots of the thick Cordilleran thrust sheets. 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.