Weichselian Convolution Phenomena and processes in fine sediments. |
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Authors: | JEF VANDENBERGHE PETER VAN DEN BROEK |
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Institution: | Vrije Universiteit, Instituut voor Aardwetenshappen, De Boelelaan 1085, NL-1081 HV Amsterdam;Fysisch-Geografisch en Bodemkundig Laboratorium, UvA, Dapper-straat 115, NL-1093 BS Amsterdam, The Netherlands |
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Abstract: | In three excavations in the southern Netherlands and northern Belgium, the Weichselian convolutions in fine sand, silt and clay deposits were investigated, and an attempt was made towards a semi-quantitative approach to some sediment parameters. This, together with a detailed field survey, enabled interpretation of the deformations as forms of periglacial loadcasting. They originated from the time of permafrost degradation when large quantites of water were available. The amplitude of the involutions can be related to the depth of the permafrost table at that time. During the weichselian, two periods occurred in which this involution process could have been active |
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