Piggyback basin in the Sevier orogenic belt, Utah: Implications for development of the thrust wedge

Abstract

Research Article| August 01, 1991 Piggyback basin in the Sevier orogenic belt, Utah: Implications for development of the thrust wedge Timothy F. Lawton; Timothy F. Lawton 1Department of Earth Sciences, New Mexico State University, Las Cruces, New Mexico 88003 Search for other works by this author on: GSW Google Scholar James H. Trexler, Jr. James H. Trexler, Jr. 2Department of Geological Sciences, University of Nevada, Reno, Nevada 89557 Search for other works by this author on: GSW Google Scholar Author and Article Information Timothy F. Lawton 1Department of Earth Sciences, New Mexico State University, Las Cruces, New Mexico 88003 James H. Trexler, Jr. 2Department of Geological Sciences, University of Nevada, Reno, Nevada 89557 Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1991) 19 (8): 827–830. https://doi.org/10.1130/0091-7613(1991)019<0827:PBITSO>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 Timothy F. Lawton, James H. Trexler; Piggyback basin in the Sevier orogenic belt, Utah: Implications for development of the thrust wedge. Geology 1991;; 19 (8): 827–830. doi: https://doi.org/10.1130/0091-7613(1991)019<0827:PBITSO>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 Timing data on a frontal thrust system indicate that the Sevier thrust wedge of central Utah advanced rapidly to its ultimate structural front in ∼30 m.y., between early Albian and Campanian time. It then persisted by out-of-sequence thrusting for an additional 25 m.y., until the early Eocene. The key to the history of the frontal thrust is a piggyback basin that formed on the hanging wall. Unconformity-bounded sedimentary units within the basin thin both westward and eastward onto structures generated by thrust faulting. Up to 860 m of upper Campanian to lower Eocene strata accumulated between these structures, which consist of a ramp anticline in the west and a thrust duplex in the east. The newly recognized interaction of coeval deposition and thrust deformation permits revised limits on the inception and longevity of the frontal thrust system. 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.