Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1130/B35006.1 |
Arrested development: Erosional equilibrium in the southern Sierra Nevada, California, maintained by feedbacks between channel incision and hillslope sediment production | |
Callahan, Russell P.1,2; Ferrier, Ken L.3,4; Dixon, Jean5; Dosseto, Anthony6; Hahn, W. Jesse7; Jessup, Barbara S.1; Miller, Scott N.2,8; Hunsaker, Carolyn T.9; Johnson, Dale W.10; Sklar, Leonard S.11; Riebe, Clifford S.1,2 | |
2019-07-01 | |
发表期刊 | GEOLOGICAL SOCIETY OF AMERICA BULLETIN |
ISSN | 0016-7606 |
EISSN | 1943-2674 |
出版年 | 2019 |
卷号 | 131页码:1179-1202 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Australia; Canada |
英文摘要 | Tributary creeks of the southern Sierra Nevada have pronounced knickpoints that separate the landscape into an alternating sequence of gently sloped treads and steeply sloped risers. These knickpoints and the surrounding "stepped topography" suggest that the landscape is still responding to Pleistocene changes in base level on mainstem rivers. We tested this hypothesis using cosmogenic nuclides and uranium isotopes measured in stream sediment from widely distributed locations. Catchment-scale erosion rates from the cosmogenic nuclides suggest that the treads are relict surfaces that have adjusted to a previous base level. Nevertheless, erosion rates of relict interfiuves are similar to canyon incision rates, implying that relief is unchanging in the lower Kings and San Joaquin Rivers. In addition, our results suggest that much of the southern Sierra Nevada is in a state of arrested development: the landscape is not fully adjusted to-and moreover is not responding to- changes in base-level lowering in the canyons. We propose that this can be explained by a paucity of coarse sediment supply, which fails to provide sufficient tools for bedrock channel incision at knickpoints. We hypothesize that the lack of coarse sediment in channels is driven by intense weathering of the local granitic bedrock, which reduces the size of sediment supplied from hillslopes to the channels. Our analysis highlights a feedback in which sediment size reduction due to weathering on hillslopes and transport in channels is both a key response to and control of bedrock channel incision and landscape adjustment to base-level change. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000471802800007 |
WOS关键词 | DEPENDENT RIVER INCISION ; IN-SITU BE-10 ; TOPOGRAPHIC EVOLUTION ; CLIMATIC CONTROL ; GRAIN-SIZE ; COSMOGENIC NUCLIDE ; LANDSCAPE EVOLUTION ; STEPPED TOPOGRAPHY ; DENUDATION RATES ; CHEMICAL EROSION |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/184597 |
专题 | 地球科学 |
作者单位 | 1.Univ Wyoming, Dept Geol & Geophys, Laramie, WY 82071 USA; 2.Univ Wyoming, Wyoming Ctr Environm Hydrol & Geophys, Laramie, WY 82071 USA; 3.Georgia Inst Technol, Sch Earth & Atmospher Sci, Atlanta, GA 30332 USA; 4.Univ Wisconsin, Dept Geosci, Madison, WI 53706 USA; 5.Montana State Univ, Dept Earth Sci, Bozeman, MT 59717 USA; 6.Univ Wollongong, Sch Earth & Environm Sci, Wollongong Isotope Geochronol Lab, Wollongong, NSW 2522, Australia; 7.Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA; 8.Univ Wyoming, Dept Ecosyst Sci & Management, Laramie, WY 82071 USA; 9.US Forest Serv, Pacific Southwest Res Stn, USDA, Fresno, CA 93710 USA; 10.Univ Nevada, Dept Nat Resources & Environm Sci, Reno, NV 89557 USA; 11.Concordia Univ, Dept Geog Planning & Environm, Montreal, PQ H3G 1M8, Canada |
推荐引用方式 GB/T 7714 | Callahan, Russell P.,Ferrier, Ken L.,Dixon, Jean,et al. Arrested development: Erosional equilibrium in the southern Sierra Nevada, California, maintained by feedbacks between channel incision and hillslope sediment production[J]. GEOLOGICAL SOCIETY OF AMERICA BULLETIN,2019,131:1179-1202. |
APA | Callahan, Russell P..,Ferrier, Ken L..,Dixon, Jean.,Dosseto, Anthony.,Hahn, W. Jesse.,...&Riebe, Clifford S..(2019).Arrested development: Erosional equilibrium in the southern Sierra Nevada, California, maintained by feedbacks between channel incision and hillslope sediment production.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,131,1179-1202. |
MLA | Callahan, Russell P.,et al."Arrested development: Erosional equilibrium in the southern Sierra Nevada, California, maintained by feedbacks between channel incision and hillslope sediment production".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 131(2019):1179-1202. |
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