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Rates of erosion and landscape change along the Blue Ridge escarpment, southern Appalachian Mountains, estimated from in situ cosmogenic 10Be
dc.contributor.authorLinari, Colleen L.
dc.contributor.authorBierman, Paul R.
dc.contributor.authorPortenga, Eric W.
dc.contributor.authorPavich, Milan J.
dc.contributor.authorFinkel, Robert C.
dc.contributor.authorFreeman, Stewart P.H.T.
dc.date.accessioned2017-05-10T17:49:05Z
dc.date.available2018-07-09T17:42:25Zen
dc.date.issued2017-05
dc.identifier.citationLinari, Colleen L.; Bierman, Paul R.; Portenga, Eric W.; Pavich, Milan J.; Finkel, Robert C.; Freeman, Stewart P.H.T. (2017). "Rates of erosion and landscape change along the Blue Ridge escarpment, southern Appalachian Mountains, estimated from in situ cosmogenic 10Be." Earth Surface Processes and Landforms 42(6): 928-940.
dc.identifier.issn0197-9337
dc.identifier.issn1096-9837
dc.identifier.urihttps://hdl.handle.net/2027.42/136748
dc.description.abstractThe Blue Ridge escarpment, located within the southern Appalachian Mountains of Virginia and North Carolina, forms a distinct, steep boundary between the lower‐elevation Piedmont and higher‐elevation Blue Ridge physiographic provinces. To understand better the rate at which this landform and the adjacent landscape are changing, we measured cosmogenic beryllium‐10 (10Be) in quartz separated from sediment samples (n = 50) collected in 32 streams and from three exposed bedrock outcrops along four transects normal to the escarpment, allowing us to calculate erosion rates integrated over 104–105 years. These basin‐averaged erosion rates (5.4–49 m Myr−1) are consistent with those measured elsewhere in the southern Appalachain Mountains and show a positive relationship between erosion rate and average basin slope. Erosion rates show no relationship with basin size or relative position of the Brevard fault zone, a fundamental structural element of the region. The cosmogenic isotopic data, when considered along with the distribution of average basin slopes in each physiographic province, suggest that the escarpment is eroding on average more rapidly than the Blue Ridge uplands, which are eroding more rapidly than the Piedmont lowlands. This difference in erosion rates by geomorphic setting suggests that the elevation difference between the uplands and lowlands adjacent to the escarpment is being reduced but at extremely slow rates. Copyright © 2016 John Wiley & Sons, Ltd.
dc.publisherWiley Periodicals, Inc.
dc.publisherTerra Nostra, INQUA
dc.subject.otherberyllium‐10 (10Be)
dc.subject.otherpassive margin
dc.subject.othercosmogenic isotopes
dc.titleRates of erosion and landscape change along the Blue Ridge escarpment, southern Appalachian Mountains, estimated from in situ cosmogenic 10Be
dc.typeArticleen_US
dc.rights.robotsIndexNoFollow
dc.subject.hlbsecondlevelGeology and Earth Sciences
dc.subject.hlbtoplevelScience
dc.description.peerreviewedPeer Reviewed
dc.description.bitstreamurlhttps://deepblue.lib.umich.edu/bitstream/2027.42/136748/1/esp4051-sup-0001-Supplementary_Colleen_small.pdf
dc.description.bitstreamurlhttps://deepblue.lib.umich.edu/bitstream/2027.42/136748/2/esp4051_am.pdf
dc.description.bitstreamurlhttps://deepblue.lib.umich.edu/bitstream/2027.42/136748/3/esp4051.pdf
dc.identifier.doi10.1002/esp.4051
dc.identifier.sourceEarth Surface Processes and Landforms
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