Tectonics of the Yellowstone hotspot wake in, southwestern Montana

Research Article| May 01, 1993 Tectonics of the Yellowstone hotspot wake in, southwestern Montana William J. Fritz; William J. Fritz 1Department of Geology, Georgia State University, Atlanta, Georgia 30303 Search for other works by this author on: GSW Google Scholar James W. Sears James W. Sears 2Department of Geology, University of Montana, Missoula, Montana 59812 Search for other works by this author on: GSW Google Scholar Author and Article Information William J. Fritz 1Department of Geology, Georgia State University, Atlanta, Georgia 30303 James W. Sears 2Department of Geology, University of Montana, Missoula, Montana 59812 Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1993) 21 (5): 427–430. https://doi.org/10.1130/0091-7613(1993)021<0427:TOTYHW>2.3.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 William J. Fritz, James W. Sears; Tectonics of the Yellowstone hotspot wake in, southwestern Montana. Geology 1993;; 21 (5): 427–430. doi: https://doi.org/10.1130/0091-7613(1993)021<0427:TOTYHW>2.3.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 Deposits off a Neogene paleovalley provide a geologic datum in southwestern Montana that brackets the age of faulting associated with the Yellowstone hotspot. Ages of paleovalley deposits on top of the modern Blacktail, Ruby, Tendoy, and Centennial ranges and in adjacent valleys range from 16 to 2 Ma. At least 2 km of offset has occurred since emplacement of the Timber Hill basalt (6.0 ±0.1 Ma); much may have occurred after deposition of the 2.0 Ma Huckleberry Ridge Tuff, which is now found in isolated outcrops as far north as the Ruby Range. Gravel clasts within the paleovalley have a northern provenance, whereas volcanic and volcaniclastic rocks were derived from the Snake River Plain to the south. We propose that uplift associated with passage of the hotspot caused the drainage reversal. 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.