Ultrahelvetic Flysch Sedimentation and Deformation Related to Plate Tectonics

Abstract

Research Article| May 01, 1971 Ultrahelvetic Flysch Sedimentation and Deformation Related to Plate Tectonics K. J HSÜ; K. J HSÜ Geological Institute, Swiss Federal Institute of Technology, Zurich, Switzerland Search for other works by this author on: GSW Google Scholar S. O SCHLANGER S. O SCHLANGER Department of Geological Sciences, University of California, Riverside, California 92507 Search for other works by this author on: GSW Google Scholar Author and Article Information K. J HSÜ Geological Institute, Swiss Federal Institute of Technology, Zurich, Switzerland S. O SCHLANGER Department of Geological Sciences, University of California, Riverside, California 92507 Publisher: Geological Society of America Received: 13 Jul 1970 Revision Received: 21 Dec 1970 First Online: 02 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Copyright © 1971, The Geological Society of America, Inc. Copyright is not claimed on any material prepared by U.S. government employees within the scope of their employment. GSA Bulletin (1971) 82 (5): 1207–1218. https://doi.org/10.1130/0016-7606(1971)82[1207:UFSADR]2.0.CO;2 Article history Received: 13 Jul 1970 Revision Received: 21 Dec 1970 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation K. J HSÜ, S. O SCHLANGER; Ultrahelvetic Flysch Sedimentation and Deformation Related to Plate Tectonics. GSA Bulletin 1971;; 82 (5): 1207–1218. doi: https://doi.org/10.1130/0016-7606(1971)82[1207:UFSADR]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 Arguments are presented to support the proposition that Ultrahelvetic Flysch basins were present on both sides of the Habkern island arc that was convex to the southeast during Paleocene time. The width of this Ultrahelvetic realm of sedimentation is estimated to have been at least 300 km in a northwest-southeast direction; this estimate is based upon comparison with the geometrical dimensions of modern basins and on paleoecological considerations. The deformational history of the Ultrahelvetic Flysch is interpreted in terms of plate tectonics. Two plates were involved, a Helvetic plate and a Penninic plate. The origin of the Flysch basins was related to the descent of the northward-moving Penninic plate under an island arc which was at the leading edge of the Helvetic plate. During late Eocene and early Oligocene, a plate flip took place and the Helvetic plate then descended below the Penninic plate. This reversal in plate relationships accounts for the occurrence of the discordant Bergell Pluton and concurrent andesitic volcanism, which supplied detritus to the North Helvetic Flysch. 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.