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Extreme southwestern margin of late Quaternary glaciation in North America: Timing and controls

2003; Geological Society of America; Volume: 31; Issue: 8 Linguagem: Inglês

10.1130/g19561.1

1943-2682

Lewis A. Owen, Robert C. Finkel, Richard A. Minnich, Anne E. Perez,

Cryospheric studies and observations

Research Article| August 01, 2003 Extreme southwestern margin of late Quaternary glaciation in North America: Timing and controls Lewis A. Owen; Lewis A. Owen 1Department of Earth Sciences, University of California, Riverside, California 92521, USA Search for other works by this author on: GSW Google Scholar Robert C. Finkel; Robert C. Finkel 2Center for Accelerator Mass Spectrometry, Lawrence Livermore National Laboratory, Livermore, California 94550, USA, and Department of Earth Sciences, University of California, Riverside, California 92521, USA Search for other works by this author on: GSW Google Scholar Richard A. Minnich; Richard A. Minnich 3Department of Earth Sciences, University of California, Riverside, California 92521, USA Search for other works by this author on: GSW Google Scholar Anne E. Perez Anne E. Perez 3Department of Earth Sciences, University of California, Riverside, California 92521, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Lewis A. Owen 1Department of Earth Sciences, University of California, Riverside, California 92521, USA Robert C. Finkel 2Center for Accelerator Mass Spectrometry, Lawrence Livermore National Laboratory, Livermore, California 94550, USA, and Department of Earth Sciences, University of California, Riverside, California 92521, USA Richard A. Minnich 3Department of Earth Sciences, University of California, Riverside, California 92521, USA Anne E. Perez 3Department of Earth Sciences, University of California, Riverside, California 92521, USA Publisher: Geological Society of America Received: 03 Jan 2003 Revision Received: 01 May 2003 Accepted: 02 May 2003 First Online: 02 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2003) 31 (8): 729–732. https://doi.org/10.1130/G19561.1 Article history Received: 03 Jan 2003 Revision Received: 01 May 2003 Accepted: 02 May 2003 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Lewis A. Owen, Robert C. Finkel, Richard A. Minnich, Anne E. Perez; Extreme southwestern margin of late Quaternary glaciation in North America: Timing and controls. Geology 2003;; 31 (8): 729–732. doi: https://doi.org/10.1130/G19561.1 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 Well-preserved latero-frontal moraines in the eastern San Bernardino Mountains of southern California provide evidence for several glacial advances during the late Quaternary and mark the southwesternmost limit of glaciation in the Western Cordillera. Using geomorphology and 10Be cosmogenic radionuclide dating, a succession of moraines from three glaciated valleys is dated to 18–20 ka (Last Glacial Maximum), 15–16 ka (Heinrich Event 1), 12–13 ka (Younger Dryas Stade), and 5–9 ka (early-middle Holocene). These ages substantiate the view that glaciation throughout the American Cordilleras was synchronous during the late Quaternary. Furthermore, these data show that glacial advances in southern California occur when a significant decrease in summer temperature is coupled with an increase in moisture flux producing high winter snowfall. This allows for perennial snow accumulation that may, under appropriate conditions, persist to form glacial ice. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.