Erosional equilibrium and disequilibrium in the Sierra Nevada, inferred from cosmogenic 26Al and 10Be in alluvial sediment

Research Article| September 01, 2000 Erosional equilibrium and disequilibrium in the Sierra Nevada, inferred from cosmogenic 26Al and 10Be in alluvial sediment Clifford S. Riebe; Clifford S. Riebe 1Department of Earth and Planetary Science, University of California, Berkeley, California 94720-4767, USA Search for other works by this author on: GSW Google Scholar James W. Kirchner; James W. Kirchner 1Department of Earth and Planetary Science, University of California, Berkeley, California 94720-4767, USA Search for other works by this author on: GSW Google Scholar Darryl E. Granger; Darryl E. Granger 2PRIME Lab and Department of Earth and Atmospheric Sciences, Purdue University, West Lafayette, Indiana 47907-1397, USA Search for other works by this author on: GSW Google Scholar Robert C. Finkel Robert C. Finkel 3Center for Accelerator Mass Spectrometry, Lawrence Livermore National Laboratory, Livermore, California 94551-9900, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Clifford S. Riebe 1Department of Earth and Planetary Science, University of California, Berkeley, California 94720-4767, USA James W. Kirchner 1Department of Earth and Planetary Science, University of California, Berkeley, California 94720-4767, USA Darryl E. Granger 2PRIME Lab and Department of Earth and Atmospheric Sciences, Purdue University, West Lafayette, Indiana 47907-1397, USA Robert C. Finkel 3Center for Accelerator Mass Spectrometry, Lawrence Livermore National Laboratory, Livermore, California 94551-9900, USA Publisher: Geological Society of America Received: 24 Jan 2000 Revision Received: 01 Jun 2000 Accepted: 14 Jun 2000 First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2000) 28 (9): 803–806. https://doi.org/10.1130/0091-7613(2000)28<803:EEADIT>2.0.CO;2 Article history Received: 24 Jan 2000 Revision Received: 01 Jun 2000 Accepted: 14 Jun 2000 First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Clifford S. Riebe, James W. Kirchner, Darryl E. Granger, Robert C. Finkel; Erosional equilibrium and disequilibrium in the Sierra Nevada, inferred from cosmogenic 26Al and 10Be in alluvial sediment. Geology 2000;; 28 (9): 803–806. doi: https://doi.org/10.1130/0091-7613(2000)28<803:EEADIT>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 We used cosmogenic 26Al and 10Be in stream sediment to measure landscape-scale erosion rates for topographically diverse catchments at seven Sierra Nevada sites. At three sites, erosion rates and hillslope gradients are strongly correlated, increasing with proximity to fault scarps and river canyons, which appear to have accelerated local base-level lowering rates, and thus increased catchment erosion rates by up to 15-fold. At four other sites, far from fault scarps and river canyons, erosion rates are much more uniform and less sensitive to average hillslope gradient. Our measurements show that contrasts in landscape erosion rates cannot be inferred from hillslope gradients alone, because landscapes can evolve toward a state of erosional equilibrium, in which steep and gentle slopes erode at similar rates. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.