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Landscape imprints of changing glacial regimes during ice-sheet build-up and decay: a conceptual model from Svalbard

Author:
  • Jon Y. Landvik
  • Helena Alexanderson
  • Mona Henriksen
  • Olafur Ingolfsson
Publishing year: 2014
Language: English
Pages: 258-268
Publication/Series: Quaternary Science Reviews
Volume: 92
Document type: Journal article
Publisher: Elsevier

Abstract english

The behaviour of ice sheets and their geologic imprints in fjord regions are often multifaceted. Fjords, which were temporarily occupied by fast flowing ice-streams during major glaciations, and inter-fjord areas, which were covered by less active ice, show different signatures of past glaciations. The land and marine records of glaciations over the western Svalbard fjord region have been extensively studied during the last few decades. We have re-examined ice-flow records from stratigraphic and geomorphic settings, and propose a succession of ice-flow events that occurred repeatedly over glacial cycles: the maximum, the transitional, and the local flow style. The differently topographically constrained segments of the ice-sheet switched behaviour as glacial dynamics developed through each glacial cycle. These segments, as well as the different flow styles, are reflected differently in the offshore stratigraphic record. We propose that the glacial geomorphological signatures in the inter ice-stream areas mostly developed under warm-based conditions during a late phase of the glaciations, and that the overall glacial imprints in the landscape are strongly biased towards the youngest events. (C) 2013 Elsevier Ltd. All rights reserved.

Keywords

  • Geology
  • Svalbard
  • Ice flow
  • Glacial regime
  • Landscape imprints

Other

Published
  • Glacial history of Svalbard
  • ISSN: 0277-3791
Helena Alexandersson
E-mail: helena [dot] alexanderson [at] geol [dot] lu [dot] se

Professor

Quaternary Sciences

+46 46 222 44 83

435

16

Aeolian sand project

Project members
Members of the aeolian sand project: Martin Bernhardson, Sara Florén, Edyta Kalińska-Nartiša and Helena Alexanderson.

Read more about the project here.