Late Paleozoic deformation of the cratonic carbonate cover of eastern North America

Abstract

Research Article| May 01, 1989 Late Paleozoic deformation of the cratonic carbonate cover of eastern North America John P. Craddock; John P. Craddock 1Department of Geological Sciences, University of Michigan, Ann Arbor, Michigan 48109 Search for other works by this author on: GSW Google Scholar Ben A. van der Pluijm Ben A. van der Pluijm 1Department of Geological Sciences, University of Michigan, Ann Arbor, Michigan 48109 Search for other works by this author on: GSW Google Scholar Author and Article Information John P. Craddock 1Department of Geological Sciences, University of Michigan, Ann Arbor, Michigan 48109 Ben A. van der Pluijm 1Department of Geological Sciences, University of Michigan, Ann Arbor, Michigan 48109 Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1989) 17 (5): 416–419. https://doi.org/10.1130/0091-7613(1989)017<0416:LPDOTC>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 Email Tools Icon Tools Get Permissions Search Site Citation John P. Craddock, Ben A. van der Pluijm; Late Paleozoic deformation of the cratonic carbonate cover of eastern North America. Geology 1989;; 17 (5): 416–419. doi: https://doi.org/10.1130/0091-7613(1989)017<0416:LPDOTC>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 Paleozoic carbonates that cover the eastern half of the North American craton preserved a bedding-parallel shortening fabric up to 800 km away from the Appalachian-Ouachita orogenic front as recorded by mechanical twins in calcite. A strain fabric is present in 29 of 31 samples from three traverses within the flat-lying cratonic cover sequence: Jasper, Arkansas, to Minneapolis, Minnesota, Bluefield, West Virginia, to Madison, Wisconsin; and Albany, New York, to Hamilton, Ontario. Twinning is found only in Paleozoic carbonates and is absent in Cretaceous limestones. In the two southernmost traverses, the orientation of the principal shortening axis (e1) is perpendicular to the thrust front and parallel to the thrusting direction of the southern Appalachians and the Ouachitas. The magnitude of calcite shortening strain (<6%) and the calculated differential stress (<90 MPa) decrease exponentially away from the orogenic front until twinning is absent. The northernmost traverse shows greater complexity, probably of its location in the bend of the Appalachian trend. We conclude that the regional strain fabric preserved in the cratonic cover sequence of eastern North America was produced by late Paleozoic orogenic stresses of the Appalachian-Ouachita orogeny, and that compressive stresses was transmitted over distances greater than 1200 km away from the active plate margin. 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.