Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019GL085164 |
Impacts of Lithologically Controlled Mechanisms on Downstream Bedrock Valley Widening | |
Langston, Abigail L.1; Temme, Arnaud J. A. M.1,2 | |
2019-11-14 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
![]() |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2019 |
卷号 | 46期号:21页码:12056-12064 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Wide, fluvially carved bedrock valleys are found around the world, but little is known about the processes and mechanisms controlling their formation. We know that rates of valley widening are controlled by stream discharge and bedrock lithology, with larger streams and softer rocks resulting in wider valleys. But lithology also controls widening mechanisms that cause valleys with contrasting bedrock strength to widen in fundamentally different ways. The effect of distinct widening mechanisms on bedrock valley width remains unquantified. We analyze a new topographic data set from various lithologies that demonstrates that bedrock valleys in soft lithologies widen downstream twice as fast as valleys in intermediate lithologies. These downstream valley-widening rates also emerge from landscape evolution model simulations using two end-member valley-widening mechanisms. The topographic data show that lithology and mechanism of valley widening are linked and that different widening mechanisms can control bedrock valley development along river courses. |
英文关键词 | bedrock valley erosion mechanism lithology |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000496472100001 |
WOS关键词 | ROCK STRENGTH ; WIDTH ; RIVER ; MODEL ; MORPHOMETRY |
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/225017 |
专题 | 环境与发展全球科技态势 |
作者单位 | 1.Kansas State Univ, Dept Geog & Geospatial Sci, Manhattan, KS 66506 USA; 2.Inst Arctic & Alpine Res, Boulder, CO USA |
推荐引用方式 GB/T 7714 | Langston, Abigail L.,Temme, Arnaud J. A. M.. Impacts of Lithologically Controlled Mechanisms on Downstream Bedrock Valley Widening[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(21):12056-12064. |
APA | Langston, Abigail L.,&Temme, Arnaud J. A. M..(2019).Impacts of Lithologically Controlled Mechanisms on Downstream Bedrock Valley Widening.GEOPHYSICAL RESEARCH LETTERS,46(21),12056-12064. |
MLA | Langston, Abigail L.,et al."Impacts of Lithologically Controlled Mechanisms on Downstream Bedrock Valley Widening".GEOPHYSICAL RESEARCH LETTERS 46.21(2019):12056-12064. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论