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Arrested development: Erosional equilibrium in the southern Sierra Nevada, California, maintained by feedbacks between channel incision and hillslope sediment production

2019; Geological Society of America; Volume: 131; Issue: 7-8 Linguagem: Inglês

10.1130/b35006.1

1943-2674

Russell P. Callahan, Ken L. Ferrier, J. L. Dixon, Anthony Dosseto, W. Jesse Hahm, Barbara S. Jessup, Scott N. Miller, Carolyn T. Hunsaker, Dale W. Johnson, L. S. Sklar, C. S. Riebe,

Landslides and related hazards

Research Article| February 14, 2019 Arrested development: Erosional equilibrium in the southern Sierra Nevada, California, maintained by feedbacks between channel incision and hillslope sediment production Russell P. Callahan; Russell P. Callahan † 1Department of Geology and Geophysics, University of Wyoming, Laramie, Wyoming 82071, USA2Wyoming Center for Environmental Hydrology and Geophysics, University of Wyoming, Laramie, Wyoming 82071, USA †rcallaha@uwyo.edu Search for other works by this author on: GSW Google Scholar Ken L. Ferrier; Ken L. Ferrier 3School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta Georgia 30332, USA4Department of Geoscience, University of Wisconsin, Madison, Wisconsin 53706, USA Search for other works by this author on: GSW Google Scholar Jean Dixon; Jean Dixon 5Department of Earth Sciences, Montana State University, Bozeman, Montana 59717, USA Search for other works by this author on: GSW Google Scholar Anthony Dosseto; Anthony Dosseto 6Wollongong Isotope Geochronology Laboratory, School of Earth and Environmental Sciences, University of Wollongong, Wollongong, NSW 2522, Australia Search for other works by this author on: GSW Google Scholar W. Jesse Hahm; W. Jesse Hahm 7Department of Earth and Planetary Science, University of California, Berkeley, California 94720, USA Search for other works by this author on: GSW Google Scholar Barbara S. Jessup; Barbara S. Jessup 1Department of Geology and Geophysics, University of Wyoming, Laramie, Wyoming 82071, USA Search for other works by this author on: GSW Google Scholar Scott N. Miller; Scott N. Miller 2Wyoming Center for Environmental Hydrology and Geophysics, University of Wyoming, Laramie, Wyoming 82071, USA8Department of Ecosystem Science and Management, University of Wyoming, Laramie, Wyoming 82071, USA Search for other works by this author on: GSW Google Scholar Carolyn T. Hunsaker; Carolyn T. Hunsaker 9Pacific Southwest Research Station, Forest Service, U.S. Department of Agriculture, Fresno, California 93710, USA Search for other works by this author on: GSW Google Scholar Dale W. Johnson; Dale W. Johnson 10Department of Natural Resources and Environmental Sciences, University of Nevada, Reno, Nevada 89557, USA Search for other works by this author on: GSW Google Scholar Leonard S. Sklar; Leonard S. Sklar 11Department of Geography, Planning & Environment, Concordia University, Montreal, Quebec H3G 1M8, Canada Search for other works by this author on: GSW Google Scholar Clifford S. Riebe Clifford S. Riebe 1Department of Geology and Geophysics, University of Wyoming, Laramie, Wyoming 82071, USA2Wyoming Center for Environmental Hydrology and Geophysics, University of Wyoming, Laramie, Wyoming 82071, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Russell P. Callahan † 1Department of Geology and Geophysics, University of Wyoming, Laramie, Wyoming 82071, USA2Wyoming Center for Environmental Hydrology and Geophysics, University of Wyoming, Laramie, Wyoming 82071, USA Ken L. Ferrier 3School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta Georgia 30332, USA4Department of Geoscience, University of Wisconsin, Madison, Wisconsin 53706, USA Jean Dixon 5Department of Earth Sciences, Montana State University, Bozeman, Montana 59717, USA Anthony Dosseto 6Wollongong Isotope Geochronology Laboratory, School of Earth and Environmental Sciences, University of Wollongong, Wollongong, NSW 2522, Australia W. Jesse Hahm 7Department of Earth and Planetary Science, University of California, Berkeley, California 94720, USA Barbara S. Jessup 1Department of Geology and Geophysics, University of Wyoming, Laramie, Wyoming 82071, USA Scott N. Miller 2Wyoming Center for Environmental Hydrology and Geophysics, University of Wyoming, Laramie, Wyoming 82071, USA8Department of Ecosystem Science and Management, University of Wyoming, Laramie, Wyoming 82071, USA Carolyn T. Hunsaker 9Pacific Southwest Research Station, Forest Service, U.S. Department of Agriculture, Fresno, California 93710, USA Dale W. Johnson 10Department of Natural Resources and Environmental Sciences, University of Nevada, Reno, Nevada 89557, USA Leonard S. Sklar 11Department of Geography, Planning & Environment, Concordia University, Montreal, Quebec H3G 1M8, Canada Clifford S. Riebe 1Department of Geology and Geophysics, University of Wyoming, Laramie, Wyoming 82071, USA2Wyoming Center for Environmental Hydrology and Geophysics, University of Wyoming, Laramie, Wyoming 82071, USA †rcallaha@uwyo.edu Publisher: Geological Society of America Received: 11 Apr 2018 Revision Received: 28 Aug 2018 Accepted: 15 Nov 2018 First Online: 14 Feb 2019 Online Issn: 1943-2674 Print Issn: 0016-7606 © 2019 Geological Society of America GSA Bulletin (2019) 131 (7-8): 1179–1202. https://doi.org/10.1130/B35006.1 Article history Received: 11 Apr 2018 Revision Received: 28 Aug 2018 Accepted: 15 Nov 2018 First Online: 14 Feb 2019 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Russell P. Callahan, Ken L. Ferrier, Jean Dixon, Anthony Dosseto, W. Jesse Hahm, Barbara S. Jessup, Scott N. Miller, Carolyn T. Hunsaker, Dale W. Johnson, Leonard S. Sklar, Clifford S. Riebe; Arrested development: Erosional equilibrium in the southern Sierra Nevada, California, maintained by feedbacks between channel incision and hillslope sediment production. GSA Bulletin 2019;; 131 (7-8): 1179–1202. doi: https://doi.org/10.1130/B35006.1 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 SocietyGSA Bulletin Search Advanced Search Abstract Tributary creeks of the southern Sierra Nevada have pronounced knickpoints that separate the landscape into an alternating sequence of gently sloped treads and steeply sloped risers. These knickpoints and the surrounding "stepped topography" suggest that the landscape is still responding to Pleistocene changes in base level on main-stem rivers. We tested this hypothesis using cosmogenic nuclides and uranium isotopes measured in stream sediment from widely distributed locations. Catchment-scale erosion rates from the cosmogenic nuclides suggest that the treads are relict surfaces that have adjusted to a previous base level. Nevertheless, erosion rates of relict interfluves are similar to canyon incision rates, implying that relief is unchanging in the lower Kings and San Joaquin Rivers. In addition, our results suggest that much of the southern Sierra Nevada is in a state of arrested development: the landscape is not fully adjusted to—and moreover is not responding to— changes in base-level lowering in the canyons. We propose that this can be explained by a paucity of coarse sediment supply, which fails to provide sufficient tools for bedrock channel incision at knickpoints. We hypothesize that the lack of coarse sediment in channels is driven by intense weathering of the local granitic bedrock, which reduces the size of sediment supplied from hillslopes to the channels. Our analysis highlights a feedback in which sediment size reduction due to weathering on hillslopes and transport in channels is both a key response to and control of bedrock channel incision and landscape adjustment to base-level change. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.