Evidence of major Middle Cambrian deformation in the Ross orogen, Antarctica

Abstract

Research Article| January 01, 1992 Evidence of major Middle Cambrian deformation in the Ross orogen, Antarctica A. J. Rowell; A. J. Rowell 1Museum of Invertebrate Paleontology and Department of Geology, University of Kansas, Lawrence, Kansas 66045 Search for other works by this author on: GSW Google Scholar Margaret N. Rees; Margaret N. Rees 2Department of Geoscience, University of Nevada, Las Vegas, Nevada 89154 Search for other works by this author on: GSW Google Scholar Kevin R. Evans Kevin R. Evans 3Department of Geology, University of Kansas, Lawrence, Kansas 66045 Search for other works by this author on: GSW Google Scholar Geology (1992) 20 (1): 31–34. https://doi.org/10.1130/0091-7613(1992)020<0031:EOMMCD>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 A. J. Rowell, Margaret N. Rees, Kevin R. Evans; Evidence of major Middle Cambrian deformation in the Ross orogen, Antarctica. Geology 1992;; 20 (1): 31–34. doi: https://doi.org/10.1130/0091-7613(1992)020<0031:EOMMCD>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 Long-lived polyphase tectonism in the Cambrian history of the Ross orogen is demonstrated by recent stratigraphic studies in both the central and Weddell Sea segments of the Transantarctic Mountains. We postulate that strong early Middle Cambrian deformation preceded a more widely recognized Late Cambrian-Early Ordovician period of contraction and magmatism. These Middle Cambrian movements were locally the principal phase of orogenic deformation. They profoundly altered sedimentation patterns along the Antarctic margin, so that in the Weddell Sea region, when carbonate platform sedimentation resumed, the platform margin was reestablished far oceanward of its Early Cambrian location. Intra-Cambrian tectonism along the paleo-Pacific margin of Gondwana was not confined to its Antarctic segment; comparable activity recently has been described from Australia and is known from South America. These movements may be related to amalgamation of East and West Gondwana. 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.