Explicit treatment of inheritance in dating depositional surfaces using in situ 10Be and 26Al (1996)

Research Article| January 01, 1996 Explicit treatment of inheritance in dating depositional surfaces using in situ 10Be and 26Al Robert S. Anderson; Robert S. Anderson 1Department of Earth Sciences and Institute for Tectonics, University of California, Santa Cruz, California 95064 Search for other works by this author on: GSW Google Scholar James L. Repka; James L. Repka 1Department of Earth Sciences and Institute for Tectonics, University of California, Santa Cruz, California 95064 Search for other works by this author on: GSW Google Scholar Gregory S. Dick Gregory S. Dick 1Department of Earth Sciences and Institute for Tectonics, University of California, Santa Cruz, California 95064 Search for other works by this author on: GSW Google Scholar Author and Article Information Robert S. Anderson 1Department of Earth Sciences and Institute for Tectonics, University of California, Santa Cruz, California 95064 James L. Repka 1Department of Earth Sciences and Institute for Tectonics, University of California, Santa Cruz, California 95064 Gregory S. Dick 1Department of Earth Sciences and Institute for Tectonics, University of California, Santa Cruz, California 95064 Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1996) 24 (1): 47–51. https://doi.org/10.1130/0091-7613(1996)024<0047:ETOIID>2.3.CO;2 Article history First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Robert S. Anderson, James L. Repka, Gregory S. Dick; Explicit treatment of inheritance in dating depositional surfaces using in situ 10Be and 26Al. Geology 1996;; 24 (1): 47–51. doi: https://doi.org/10.1130/0091-7613(1996)024<0047:ETOIID>2.3.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 describe a new strategy for dating depositional landscape surfaces using in situ–produced cosmogenic radionuclides (CRNs) that removes the complication of nuclide inheritance by clasts prior to deposition. Two amalgamated samples, each consisting of 30 clasts, one from the surface and one from a fixed depth in the subsurface, constrain this CRN inheritance and date the surface. The inheritance may be used to estimate minimum exhumation rates and maximum transport times within the geomorphic system. We test the technique using 10Be and 26Al to date the third (FR3) of five terraces along the Fremont River, Utah, and the third (WR3) of 15 along the Wind River, Wyoming. Whereas effective ages based solely upon the surface samples yield 118–138 ka (FR3) and 93 ka (WR3), the subsurface samples reveal that inheritance accounts for 22% (WR3) to 43% (FR3) of the total CRN concentration. Taking this into account yields terrace ages of ∼61–81 ka for FR3 and ∼67–76 ka for WR3. We explore the dependence of age estimates on the accumulation history of the terrace silt caps. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.