Cosmogenically enabled sediment budgeting

Abstract

Research Article| February 01, 2005 Cosmogenically enabled sediment budgeting Kyle K. Nichols; Kyle K. Nichols 1Department of Geology and School of Natural Resources, University of Vermont, Burlington, Vermont 05405, USA Search for other works by this author on: GSW Google Scholar Paul R. Bierman; Paul R. Bierman 1Department of Geology and School of Natural Resources, University of Vermont, Burlington, Vermont 05405, USA Search for other works by this author on: GSW Google Scholar Marc Caffee; Marc Caffee 2Center for Accelerator Mass Spectrometry, Lawrence Livermore National Laboratory, Livermore, California 94405, USA Search for other works by this author on: GSW Google Scholar Robert Finkel; Robert Finkel 2Center for Accelerator Mass Spectrometry, Lawrence Livermore National Laboratory, Livermore, California 94405, USA Search for other works by this author on: GSW Google Scholar Jennifer Larsen Jennifer Larsen 3Department of Geology, University of Vermont, Burlington, Vermont 05405, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Kyle K. Nichols 1Department of Geology and School of Natural Resources, University of Vermont, Burlington, Vermont 05405, USA Paul R. Bierman 1Department of Geology and School of Natural Resources, University of Vermont, Burlington, Vermont 05405, USA Marc Caffee 2Center for Accelerator Mass Spectrometry, Lawrence Livermore National Laboratory, Livermore, California 94405, USA Robert Finkel 2Center for Accelerator Mass Spectrometry, Lawrence Livermore National Laboratory, Livermore, California 94405, USA Jennifer Larsen 3Department of Geology, University of Vermont, Burlington, Vermont 05405, USA Publisher: Geological Society of America Received: 13 Jul 2004 Revision Received: 21 Oct 2004 Accepted: 21 Oct 2004 First Online: 09 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2005) 33 (2): 133–136. https://doi.org/10.1130/G21006.1 Article history Received: 13 Jul 2004 Revision Received: 21 Oct 2004 Accepted: 21 Oct 2004 First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Kyle K. Nichols, Paul R. Bierman, Marc Caffee, Robert Finkel, Jennifer Larsen; Cosmogenically enabled sediment budgeting. Geology 2005;; 33 (2): 133–136. doi: https://doi.org/10.1130/G21006.1 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 We used 10Be and 26Al to constrain the millennial-scale sediment and nuclide budget for a common, long-studied, but poorly understood landform in arid regions, the desert piedmont. We sampled the Chemehuevi Mountain piedmont, a complex multisurfaced landform in the Mojave Desert, western United States. The nuclide data indicate that sediment is produced more rapidly (1.1 × 105 kg·yr−1·km−2) in steep mountain source basins than on the low-gradient pediment (4.0 × 104 kg·yr−1·km−2) or the intrapiedmont mountain range (2.5 × 104 kg·yr−1·km−2). However, the bulk of the sediment in transport is derived from erosion of the large abandoned alluvial surface (3.9 × 104 kg·yr−1·km−2). The combination of mass and nuclide budgeting suggests that sediment transport speeds decrease downslope from tens of meters per year in confined channels on the proximal pediment to decimeters per year in unconfined distributaries on distal wash surfaces. The sediment and nuclide budgeting approach we use is particularly valuable in arid regions where geomorphically significant events are infrequent and dating control is poor, thus confounding traditional sediment-budgeting techniques. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.