Field evidence for climate-driven changes in sediment supply leading to strath terrace formation

Research Article| May 01, 2009 Field evidence for climate-driven changes in sediment supply leading to strath terrace formation Theodore K. Fuller; Theodore K. Fuller 11National Center for Earth-surface Dynamics, University of Minnesota, Minneapolis, Minnesota 55414, USA Search for other works by this author on: GSW Google Scholar Lesley A. Perg; Lesley A. Perg 11National Center for Earth-surface Dynamics, University of Minnesota, Minneapolis, Minnesota 55414, USA Search for other works by this author on: GSW Google Scholar Jane K. Willenbring; Jane K. Willenbring * 11National Center for Earth-surface Dynamics, University of Minnesota, Minneapolis, Minnesota 55414, USA *Current address: Institut für Mineralogie, Leibniz Universität Hannover, D-30167, Hannover, Germany. Search for other works by this author on: GSW Google Scholar Kenneth Lepper Kenneth Lepper 22Optical Dating and Dosimetry Lab, Department of Geosciences, North Dakota State University, Fargo, North Dakota 58105, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Theodore K. Fuller 11National Center for Earth-surface Dynamics, University of Minnesota, Minneapolis, Minnesota 55414, USA Lesley A. Perg 11National Center for Earth-surface Dynamics, University of Minnesota, Minneapolis, Minnesota 55414, USA Jane K. Willenbring * 11National Center for Earth-surface Dynamics, University of Minnesota, Minneapolis, Minnesota 55414, USA Kenneth Lepper 22Optical Dating and Dosimetry Lab, Department of Geosciences, North Dakota State University, Fargo, North Dakota 58105, USA *Current address: Institut für Mineralogie, Leibniz Universität Hannover, D-30167, Hannover, Germany. Publisher: Geological Society of America Received: 03 Sep 2008 Revision Received: 02 Jan 2009 Accepted: 05 Jan 2009 First Online: 02 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 © 2009 Geological Society of America Geology (2009) 37 (5): 467–470. https://doi.org/10.1130/G25487A.1 Article history Received: 03 Sep 2008 Revision Received: 02 Jan 2009 Accepted: 05 Jan 2009 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Theodore K. Fuller, Lesley A. Perg, Jane K. Willenbring, Kenneth Lepper; Field evidence for climate-driven changes in sediment supply leading to strath terrace formation. Geology 2009;; 37 (5): 467–470. doi: https://doi.org/10.1130/G25487A.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 Along the South Fork of the Eel River in northern California, paleoerosion rates derived from 10Be concentrations in late Pleistocene strath terrace sediment are a factor of 2 greater than erosion rates derived from modern stream sediment and 3.5 times greater than paleoerosion rates from the Pleistocene-Holocene transition. Using these results as a proxy for sediment supply, we provide quantitative field-based evidence that extensive strath planation is linked to elevated sediment supply conditions. We have used optically stimulated luminescence (OSL) to date strath terrace sediment and find that the highest erosion rates and most extensive period of strath planation occurred during a period of increased precipitation in the late Pleistocene. Based on our OSL data, we estimate that bedrock channel lowering rates have outpaced basin-averaged erosion rates by a factor of three since abandonment of the extensive late Pleistocene strath surface. Thus, our data indicate that hillslope relief has been increasing for the past ~20 ka. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.