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(Article of periodic en Anglais - 2009)

Document title

Ice-wedge pseudomorphs and frost-cracking structures in Weichselian sediments, Central-West Poland

published at : The Permafrost Young Researchers Network (PYRN). Special issue

Authors(s) and Affiliation(s)

EWERTOWSKI M. (1) ;
(1) Inst. of Geoecology and Geoinformation, Adam Mickiewicz Univ., Poznań, POLOGNE

Abstract

Wedge-shaped structures are described from three sites in the central Wielkopolska region (central-west Poland) in two main positions: (1) within fluvioglacial deposits below the Weichselian subglacial till and (2) within recessional deposits above this subglacial till. The wedges are interpreted as ice-wedge pseudomorphs (Rensko site), relict frost cracks (Tomice site) and thermokarst-affected ice-wedge pseudomorphs (Annowo-Kiszkowo area). It is suggested that the development of ice wedges was influenced by wet conditions in former depressions between ice-cored ridges or by large amounts of meltwater in the proglacial environment. These periglacial features support previous hypotheses that climatic conditions in the Wielkopolska region after the last ice-sheet recession changed gradually from glacial to periglacial

Source

Thematical fascicle

published at : Permafrost and periglacial processes / ISSN 1045-6740 / CODEN PEPPED

Editor : Wiley, Chichester - ROYAUME-UNI (1990)

Millesime : 2009, vol. 20, no 4 [pp. 316-330]

Bibliographic references : 1 p.

Collation : fig., tabl.

Language

Anglais

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/ppp.657

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2010
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