Summit erosion rates deduced from 10Be: Implications for relief production in the central Appalachians

Research Article| January 01, 2007 Summit erosion rates deduced from 10Be: Implications for relief production in the central Appalachians Gregory Hancock; Gregory Hancock 1Department of Geology, College of William and Mary, P.O. Box 8795, Williamsburg, Virginia 23187, USA Search for other works by this author on: GSW Google Scholar Matthew Kirwan Matthew Kirwan 1Department of Geology, College of William and Mary, P.O. Box 8795, Williamsburg, Virginia 23187, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Gregory Hancock 1Department of Geology, College of William and Mary, P.O. Box 8795, Williamsburg, Virginia 23187, USA Matthew Kirwan 1Department of Geology, College of William and Mary, P.O. Box 8795, Williamsburg, Virginia 23187, USA Publisher: Geological Society of America Received: 13 Jul 2006 Revision Received: 05 Sep 2006 Accepted: 07 Sep 2006 First Online: 09 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2007) 35 (1): 89–92. https://doi.org/10.1130/G23147A.1 Article history Received: 13 Jul 2006 Revision Received: 05 Sep 2006 Accepted: 07 Sep 2006 First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Gregory Hancock, Matthew Kirwan; Summit erosion rates deduced from 10Be: Implications for relief production in the central Appalachians. Geology 2007;; 35 (1): 89–92. doi: https://doi.org/10.1130/G23147A.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 have measured erosion rates using 10Be from bare-bedrock surfaces exposed at high elevations at Dolly Sods, West Virginia, a classic Appalachian paleoperiglacial plateau. The mean erosion rate from nine samples is 5.7 m/m.y., significantly lower than previously estimated periglacial erosion rates in this region. Measured bare-bedrock erosion rates likely represent the rate at which the highest portions of this broad upland are being lowered. Fluvial incision rates measured in the region over similar time scales are ≥2 times faster, suggesting relief is increasing in this portion of the Appalachians. This observation of increasing relief is inconsistent with prior work suggesting that the central Appalachian landscape is in dynamic equilibrium or currently decreasing in relief. We hypothesize that late Cenozoic climate change has accelerated fluvial incision rates, creating a disequilibrium landscape with growing relief with hillslopes undergoing adjustment to increased fluvial incision rates. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.