K-Ar dating of the Cima volcanic field, eastern Mojave Desert, California: Late Cenozoic volcanic history and landscape evolution

Research Article| March 01, 1984 K-Ar dating of the Cima volcanic field, eastern Mojave Desert, California: Late Cenozoic volcanic history and landscape evolution John C. Dohrenwend; John C. Dohrenwend 1U.S. Geological Survey, 345 Middlefield Road, Menlo Park, California 94025 Search for other works by this author on: GSW Google Scholar Leslie D. McFadden; Leslie D. McFadden 2Department of Geology, University of New Mexico, Albuquerque, New Mexico 87131 Search for other works by this author on: GSW Google Scholar Brent D. Turrin; Brent D. Turrin 3U.S. Geological Survey, 345 Middlefield Road, Menlo Park, California 94025 Search for other works by this author on: GSW Google Scholar Stephen G. Wells Stephen G. Wells 4Department of Geology, University of New Mexico, Albuquerque, New Mexico 87131 Search for other works by this author on: GSW Google Scholar Author and Article Information John C. Dohrenwend 1U.S. Geological Survey, 345 Middlefield Road, Menlo Park, California 94025 Leslie D. McFadden 2Department of Geology, University of New Mexico, Albuquerque, New Mexico 87131 Brent D. Turrin 3U.S. Geological Survey, 345 Middlefield Road, Menlo Park, California 94025 Stephen G. Wells 4Department of Geology, University of New Mexico, Albuquerque, New Mexico 87131 Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1984) 12 (3): 163–167. https://doi.org/10.1130/0091-7613(1984)12<163:KDOTCV>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 Permissions Search Site Citation John C. Dohrenwend, Leslie D. McFadden, Brent D. Turrin, Stephen G. Wells; K-Ar dating of the Cima volcanic field, eastern Mojave Desert, California: Late Cenozoic volcanic history and landscape evolution. Geology 1984;; 12 (3): 163–167. doi: https://doi.org/10.1130/0091-7613(1984)12<163:KDOTCV>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 SocietyGeology Search Advanced Search Abstract Thirty-four K-Ar ages and supporting paleomagnetic measurements from flows of the Cima volcanic field provide a detailed volcanic history and a temporal basis for analysis of evolving landforms. The Cima field has undergone three periods of volcanic activity, spanning late Miocene through latest Pleistocene time: (1) 7.6 to 6.5, (2) 4.5 to 3.6, and (3) 1.0 to at least 0.015 m.y. ago. These precisely dated sequences afford a unique opportunity to quantify the long-term effects of pedogenesis and erosion on volcanic landforms in an arid environment. Morphologic and pedologtc data indicate that the most stable geomorphic surfaces in the field occur on flows between 0.25 and 0.75 m.y. old. Younger flows are dominated by eolian aggradation and outcrop rubbling, and older flows are dominated by surface runoff and fluvial dissection. A process-response model involving progressive pedogenesis and a subsequent shift from infiltration to surface runoff is proposed to explain this temporal variation in land-surface stability. 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.