Possible controlling factors in the development of seasonal sand wedges on the Ordos Plateau, North China

H.M. French, J. Vandenberghe, H. Jin, R. He

Research output: Contribution to JournalReview articleAcademicpeer-review

Abstract

© 2021, The Editorial Office of Sciences in Cold and Arid Regions. All right reserved.Wedge-like structures filled with silty sand penetrate Quaternary fluvial and aeolian sediments and, in places, Tertiary bedrock on the Ordos Plateau, North China. The wedges reflect thermal contraction cracking of either permafrost or seasonal frost during the Late Pleistocene and early Holocene. Wedges of about 1 m in depth form polygonal nets of 2-3 m in diameter (type B). They contrast with wedges of 3-4 m in depth that form polygons of 10-15 m in diameter (type A). This review focuses upon the highly variable size of the inferred polygon nets and discusses the problem of differentiating between seasonally and perennially frozen ground, or between seasonal frost and permafrost.
Original languageEnglish
Pages (from-to)167-176
JournalSciences in Cold and Arid Regions
Volume13
Issue number2
DOIs
Publication statusPublished - 1 Apr 2021

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