The Siquisique ophiolites, Northern Lara State, Venezuela: A discussion on their Middle Jurassic ammonites and tectonic implications

Abstract

Research Article| August 01, 1985 The Siquisique ophiolites, Northern Lara State, Venezuela: A discussion on their Middle Jurassic ammonites and tectonic implications P. E. BARTOK; P. E. BARTOK 1Sohio Petroleum Company International, Exploration Department, 5151 San Felipe, Houston, Texas 77210 Search for other works by this author on: GSW Google Scholar O. RENZ; O. RENZ 2Naturhistorisches Museum, Augustinergasse 2, Basel CH-4001, Switzerland Search for other works by this author on: GSW Google Scholar G.E.G. WESTERMANN G.E.G. WESTERMANN 3McMaster University, Hamilton, Ontario, Canada L8S 4M1 Search for other works by this author on: GSW Google Scholar Author and Article Information P. E. BARTOK 1Sohio Petroleum Company International, Exploration Department, 5151 San Felipe, Houston, Texas 77210 O. RENZ 2Naturhistorisches Museum, Augustinergasse 2, Basel CH-4001, Switzerland G.E.G. WESTERMANN 3McMaster University, Hamilton, Ontario, Canada L8S 4M1 Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (1985) 96 (8): 1050–1055. https://doi.org/10.1130/0016-7606(1985)96<1050:TSONLS>2.0.CO;2 Article history First Online: 01 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 P. E. BARTOK, O. RENZ, G.E.G. WESTERMANN; The Siquisique ophiolites, Northern Lara State, Venezuela: A discussion on their Middle Jurassic ammonites and tectonic implications. GSA Bulletin 1985;; 96 (8): 1050–1055. doi: https://doi.org/10.1130/0016-7606(1985)96<1050:TSONLS>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 Ammonites from the pillow basalt associations of the Siquisique ophiolites located in west-central Venezuela indicate a minimum Bajocian to early Bathonian age for emplacement of the complex. The ammonites have been identified as ?Stephanoceras(Skirroceras) cf. macrum (Quenstedt), ?Emileia ex gr. multiformis (Gottsche) et quenstedti Westermann, and ?Parkinsonia sp. This association of cosmopolitan Pacific and Tethyan elements aids in the location of the western end of the Middle Jurassic seaway set between the Tethys and the Pacific Oceans (Hispanic Corridor). The apparent age of the ammonites indicates that some of the Siquisique sediments, pillow basalts, and serpentines are the oceanic remnants of an arrested early phase of rifting between North and South America. 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.