气候变化领域集成服务门户(CCPortal): The colluvium and alluvium problem: Historical review and current state of definitions

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DOI	10.1016/j.earscirev.2020.103316
	The colluvium and alluvium problem: Historical review and current state of definitions
	Miller B.A.; Juilleret J.
发表日期	2020
ISSN	0012-8590
卷号	209
英文摘要	In the history of alluvium and colluvium, the definitions have been shifted and rearranged several times, and this evolution is ongoing. Although field books, textbooks, and dictionaries provide standardized references, the authors of those definitions must wrestle with a wide variety of previous definitions, especially for colluvium. Contributing to this challenge is the need for Earth scientists to match available terminology to fit specific cases, which has resulting in the stretching of definitions to the point of overlap and sometimes contradiction. Alluvium was first used to describe gradual and imperceptible deposition of new earth material along rivers by floods. In the 19th century, as coarse, alluvium-like sediment in higher landscape positions was unlikely deposited by annual flooding, geologists explained those “older alluvium” deposits by the biblical deluge and named such materials diluvium. Although not the original definition, cases where alluvium and diluvium could not be distinguished, were named colluvium. Later, colluvial soils replaced ‘overplacement soils’ to describe regolith that had been transported down slope by mass-gravity processes. Concurrently other scientists used colluvium to describe deposits from slope wash. Modern definitions tend to connect to one, or more frequently both, of those concepts. The resulting spectrum of definitions presents the potential for confusion and miscommunication. This pattern was observed in a survey of 376 Earth scientists who generally agreed with defining colluvium as produced by mass-gravity-driven transport on steep slopes and alluvium as produced by water-driven transport on floodplains. However, diverse perspectives were evident for the spectrum between those two end members. This paper synthesizes the history, the logic, current perspectives, and potential strategies going forward. © 2020 Elsevier B.V.
英文关键词	Alluvium; Colluvial soils; Colluvium; Cover beds; Definitions; Deluvium; Diluvium; Eluvium; Hillslope Sediments; Kolluvium; Legacy Sediments; Proluvium; Regolith; Slope alluvium; Slopewash; Trapped alluvium
语种	英语
scopus关键词	colluvial deposit; flooding; floodplain; historical perspective; nineteenth century; regolith; slope failure; standardization
来源期刊	EARTH-SCIENCE REVIEWS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/209519
作者单位	Department of Agronomy, Iowa State University, Ames, IA, United States; Department of Environmental Research and Innovation, Luxembourg Institute of Science and Technology (LIST), 41 rue du Brill, Belvaux, L-4422, Luxembourg
推荐引用方式 GB/T 7714	Miller B.A.,Juilleret J.. The colluvium and alluvium problem: Historical review and current state of definitions[J],2020,209.
APA	Miller B.A.,&Juilleret J..(2020).The colluvium and alluvium problem: Historical review and current state of definitions.EARTH-SCIENCE REVIEWS,209.
MLA	Miller B.A.,et al."The colluvium and alluvium problem: Historical review and current state of definitions".EARTH-SCIENCE REVIEWS 209(2020).