Post-Batholithic Geology of the La Gloria-Presa Rodríguez Area, Baja California, Mexico

Abstract

Research Article| June 01, 1970 Post-Batholithic Geology of the La Gloria-Presa Rodríguez Area, Baja California, Mexico CLINTON J FLYNN CLINTON J FLYNN Humble Oil and Refining Co., Box 120, Denver, Colorado 80201 Search for other works by this author on: GSW Google Scholar Author and Article Information CLINTON J FLYNN Humble Oil and Refining Co., Box 120, Denver, Colorado 80201 Publisher: Geological Society of America Received: 24 Feb 1969 Revision Received: 16 Jan 1970 First Online: 02 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Copyright © 1970, 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 (1970) 81 (6): 1789–1806. https://doi.org/10.1130/0016-7606(1970)81[1789:PGOTLG]2.0.CO;2 Article history Received: 24 Feb 1969 Revision Received: 16 Jan 1970 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation CLINTON J FLYNN; Post-Batholithic Geology of the La Gloria-Presa Rodríguez Area, Baja California, Mexico. GSA Bulletin 1970;; 81 (6): 1789–1806. doi: https://doi.org/10.1130/0016-7606(1970)81[1789:PGOTLG]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 The basement terrane of the La Gloria-Presa Rodríguez area includes Upper Jurassic and/or Lower Cretaceous intermediate-composition volcanic and derived epiclastic rocks, gabbro, granodiorite, and quartz monzonite. The post-batholithic sequence consists of conglomerates of the Upper Cretaceous Redonda Formation (new name); shales, mudstones, and sandstones of the Upper Cretaceous Rosario Formation; conglomerates, sandstones, mudstones and shales of the Eocene Buenos Aires and Delicias Formations (new names); sandstones and basalts of the Miocene Rosarito Beach Formation; and Pliocene-Pleistocene capping conglomerates and sandstones.The Upper Cretaceous Redonda Formation is composed of moderately rounded cobbles of quartzite, felsite porphyry, and volcanic breccia deposited on a high-relief Lower Cretaceous basement. The Eocene Delicias Formation is divided into a lower mudstone and an upper sandstone member. The sandstone member contains a brackish-water fauna with abundant Potamides and Ostrea. The overlying Buenos Aires Formation is divided into a lower conglomerate member and an upper sandstone member. The sandstone member contains an abundant megafauna, including characteristically tropical marine species of Turritella, Ficopsis and Tellina.The structural history of the area includes deformation and erosion of the Lower Cretaceous metavolcanic and granitic rocks followed by persistent relative stability. The overlying younger strata exhibit only low inclinations, in part to the southwest, and in part to the northeast. Post-batholithic strata are cut by numerous high-angle, northeast-southwest-trending, normal faults. Several related small anticlines and synclines are developed in the area. 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.