Is the Wasatch fault footwall (Utah, United States) segmented over million-year time scales?

Research Article| May 01, 2004 Is the Wasatch fault footwall (Utah, United States) segmented over million-year time scales? Phillip A. Armstrong; Phillip A. Armstrong 1Department of Geological Sciences, California State University, Fullerton, California 92834, USA Search for other works by this author on: GSW Google Scholar Aron R. Taylor; Aron R. Taylor 1Department of Geological Sciences, California State University, Fullerton, California 92834, USA Search for other works by this author on: GSW Google Scholar Todd A. Ehlers Todd A. Ehlers 2Department of Geological Sciences, University of Michigan, Ann Arbor, Michigan 48109-1063, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Phillip A. Armstrong 1Department of Geological Sciences, California State University, Fullerton, California 92834, USA Aron R. Taylor 1Department of Geological Sciences, California State University, Fullerton, California 92834, USA Todd A. Ehlers 2Department of Geological Sciences, University of Michigan, Ann Arbor, Michigan 48109-1063, USA Publisher: Geological Society of America Received: 15 Dec 2003 Revision Received: 14 Jan 2004 Accepted: 16 Jan 2004 First Online: 02 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2004) 32 (5): 385–388. https://doi.org/10.1130/G20421.1 Article history Received: 15 Dec 2003 Revision Received: 14 Jan 2004 Accepted: 16 Jan 2004 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 Phillip A. Armstrong, Aron R. Taylor, Todd A. Ehlers; Is the Wasatch fault footwall (Utah, United States) segmented over million-year time scales?. Geology 2004;; 32 (5): 385–388. doi: https://doi.org/10.1130/G20421.1 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 Wasatch fault zone, Utah, is a 370-km-long segmented normal-fault system with topographic salients, depths of footwall exposure, geomorphic properties, and geophysical anomalies that suggest differential long-term footwall uplift and exhumation on segments that are partitioned by long-lived structural segment boundaries. Apatite (U-Th)/He ages from footwall samples along the range front from the five central footwall segments average 5.3 ± 1.0 Ma. Coupled two-dimensional thermokinematic and helium-diffusion models suggest average long-term (∼5 m.y.) exhumation rates of 0.2–0.4 mm/yr for most of the Wasatch front. The exception is the southern end of the Salt Lake City segment, where exhumation rates are two times as great as elsewhere along the Wasatch front. The relatively invariant He ages and exhumation rates imply that most of the Wasatch did not behave kinematically as independent footwall-segment blocks with differential exhumation amounts over the past 5 m.y. The structural boundaries, such as salients and intrabasin highs that partially delineate segments, may have persisted since the Pliocene and controlled the locations of the surface-rupture segments. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.