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Rate estimates for lateral bedrock erosion based on radiocarbon ages, Duck River, Tennessee

1985; Geological Society of America; Volume: 13; Issue: 2 Linguagem: Inglês

10.1130/0091-7613(1985)13 2.0.co;2

1943-2682

G. Robert Brakenridge,

Geology and Paleoclimatology Research

Research Article| February 01, 1985 Rate estimates for lateral bedrock erosion based on radiocarbon ages, Duck River, Tennessee G. Robert Brakenridge G. Robert Brakenridge 1Department of Geological Sciences, Wright State University, Dayton, Ohio 45435 Search for other works by this author on: GSW Google Scholar Geology (1985) 13 (2): 111–114. https://doi.org/10.1130/0091-7613(1985)13 2.0.CO;2 Article history first online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation G. Robert Brakenridge; Rate estimates for lateral bedrock erosion based on radiocarbon ages, Duck River, Tennessee. Geology 1985;; 13 (2): 111–114. doi: https://doi.org/10.1130/0091-7613(1985)13 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 Rates of bedrock erosion by ingrown meandering rivers can be inferred from the location of buried relict flood-plain and river-bank surfaces, associated paleosols, and radiocarbon dates. Two independent methods are used to evaluate the long-term rates of limestone bedrock erosion by the Duck River. Radiocarbon dates on samples retrieved from buried Holocene flood-plain and bank surfaces indicate lateral migration of the river bank at average rates of 0.6–1.9 m/100 yr. Such rates agree with lateral bedrock cliff erosion rates of 0.5–1.4 m/100 yr, as determined from a comparison of late Pleistocene and modern bedrock cliff and terrace scarp positions. These results show that lateral bedrock erosion by this river could have occurred coevally with flood-plain and terrace formation and that the resulting evolution of valley meander bends carved into bedrock is similar in many respects to that of channel meanders cut into alluvium. This content is PDF only. Please click on the PDF icon to access. 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.