Diapirs of the Continental Margin of Angola, Africa

Abstract

Research Article| March 01, 1971 Diapirs of the Continental Margin of Angola, Africa TIMOTHY R BAUMGARTNER; TIMOTHY R BAUMGARTNER Department of Oceanography, Oregon State University, Corvallis, Oregon 97331 Search for other works by this author on: GSW Google Scholar TJEERD H VAN ANDEL TJEERD H VAN ANDEL Department of Oceanography, Oregon State University, Corvallis, Oregon 97331 Search for other works by this author on: GSW Google Scholar Author and Article Information TIMOTHY R BAUMGARTNER Department of Oceanography, Oregon State University, Corvallis, Oregon 97331 TJEERD H VAN ANDEL Department of Oceanography, Oregon State University, Corvallis, Oregon 97331 Publisher: Geological Society of America Received: 19 Nov 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 (3): 793–802. https://doi.org/10.1130/0016-7606(1971)82[793:DOTCMO]2.0.CO;2 Article history Received: 19 Nov 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 TIMOTHY R BAUMGARTNER, TJEERD H VAN ANDEL; Diapirs of the Continental Margin of Angola, Africa. GSA Bulletin 1971;; 82 (3): 793–802. doi: https://doi.org/10.1130/0016-7606(1971)82[793:DOTCMO]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 A geophysical study of the continental slope and rise off Angola shows the presence of two basement ridges under the sedimentary prism. These ridges are the continuation of onshore basement highs, or parallel to them. The continental rise deposits are built up behind the outermost of these ridges; the deposits of the onshore Cuanza basin and its northward offshore equivalent behind the innermost one. The sedimentary sequences in both zones have a parallel history of evaporite deposition followed by diapirism. Two separate phases of salt tectonics can be distinguished which propagated eastward with time from their western terminal basement ridges. The relative ages of the onshore and offshore sequences cannot be established at this time. The offshore diapir province has a width of more than 300 km and extends possibly from the Congo Canyon in the north to near the Walvis Ridge in the south. 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.