Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1002/esp.4051 |
Rates of erosion and landscape change along the Blue Ridge escarpment, southern Appalachian Mountains, estimated from in situ cosmogenic Be-10 | |
Linari, Colleen L.1,2; Bierman, Paul R.1,2; Portenga, Eric W.3; Pavich, Milan J.4; Finkel, Robert C.5,6; Freeman, Stewart P. H. T.7 | |
通讯作者 | Bierman, Paul R. |
来源期刊 | EARTH SURFACE PROCESSES AND LANDFORMS
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ISSN | 0197-9337 |
EISSN | 1096-9837 |
出版年 | 2017 |
卷号 | 42期号:6页码:928-940 |
英文摘要 | The 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 (Be-10) 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 10(4)-10(5)years. These basin-averaged erosion rates (5.4-49m 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 (c) 2016 John Wiley & Sons, Ltd. |
英文关键词 | beryllium-10 (Be-10) passive margin cosmogenic isotopes |
类型 | Article |
语种 | 英语 |
国家 | USA ; Scotland |
收录类别 | SCI-E |
WOS记录号 | WOS:000400646100007 |
WOS关键词 | ATLANTIC PASSIVE MARGIN ; EASTERN UNITED-STATES ; DENUDATION RATES ; NAMIB DESERT ; GREAT ESCARPMENT ; NORTH-CAROLINA ; EVOLUTION ; SEDIMENT ; AL-26 ; TOPOGRAPHY |
WOS类目 | Geography, Physical ; Geosciences, Multidisciplinary |
WOS研究方向 | Physical Geography ; Geology |
来源机构 | United States Geological Survey ; University of California, Berkeley |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/198355 |
作者单位 | 1.Univ Vermont, Dept Geol, Burlington, VT 05405 USA; 2.Univ Vermont, Sch Nat Resources, Burlington, VT 05405 USA; 3.Univ Michigan, Dept Earth & Environm Sci, Ann Arbor, MI 48109 USA; 4.US Geol Survey, 959 Natl Ctr, Reston, VA 22092 USA; 5.Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA; 6.Lawrence Livermore Natl Lab, Ctr Accelerator Mass Spectrometry, Livermore, CA USA; 7.SUERC Accelerator Mass Spectrometry Lab, East Kilbride, Scotland |
推荐引用方式 GB/T 7714 | Linari, Colleen L.,Bierman, Paul R.,Portenga, Eric W.,et al. Rates of erosion and landscape change along the Blue Ridge escarpment, southern Appalachian Mountains, estimated from in situ cosmogenic Be-10[J]. United States Geological Survey, University of California, Berkeley,2017,42(6):928-940. |
APA | Linari, 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 Be-10.EARTH SURFACE PROCESSES AND LANDFORMS,42(6),928-940. |
MLA | Linari, Colleen L.,et al."Rates of erosion and landscape change along the Blue Ridge escarpment, southern Appalachian Mountains, estimated from in situ cosmogenic Be-10".EARTH SURFACE PROCESSES AND LANDFORMS 42.6(2017):928-940. |
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