Geology of the Northeast Margin of the Salton Trough, Salton Sea, California

Research Article| March 01, 1974 Geology of the Northeast Margin of the Salton Trough, Salton Sea, California ELKANAH A. BABCOCK ELKANAH A. BABCOCK 1Department of Geology, University of Alberta, Edmonton 7, Alberta, Canada Search for other works by this author on: GSW Google Scholar Author and Article Information ELKANAH A. BABCOCK 1Department of Geology, University of Alberta, Edmonton 7, Alberta, Canada Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (1974) 85 (3): 321–332. https://doi.org/10.1130/0016-7606(1974)85<321:GOTNMO>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 Email Tools Icon Tools Get Permissions Search Site Citation ELKANAH A. BABCOCK; Geology of the Northeast Margin of the Salton Trough, Salton Sea, California. GSA Bulletin 1974;; 85 (3): 321–332. doi: https://doi.org/10.1130/0016-7606(1974)85<321:GOTNMO>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 San Andreas fault zone, in the Durmid area northeast of the Salton Sea, forms the northeast boundary of the Salton trough (the landward continuation of the Gulf of California rift). The zone is characterized by subparallel faults having both right-lateral and vertical separations. Stratigraphic offsets indicate at least 1,100 m of vertical separation on the San Andreas fault, southwest side downthrown, and 850-m right-lateral strike-slip separation is indicated by offset drainage.An anticlinal structure southwest of the San Andreas fault is probably caused by drape folding over an upfaulted basement block or a recently intruded pluton. Small folds on the southwest flank of the anticline are caused by drag along the San Andreas fault and gravity sliding. An angular discordance of 18° between the Shavers Well and Borrego Formations indicates that tilting adjacent to the San Andreas fault began prior to Borrego deposition in Pleistocene time. Folding followed deposition of the lacustrine Borrego Formation. Uplift halted, and the area was planed off by erosion. Renewed uplift followed, probably within the last few thousand years. 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.