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A short-lived aeolian event during the Early Holocene in southeastern Norway

Author:
  • Helena Alexanderson
  • Mona Henriksen
Publishing year: 2015
Language: English
Pages: 175-180
Publication/Series: Quaternary Geochronology
Volume: 30
Document type: Journal article
Publisher: Elsevier

Abstract english

The Starmoen dune field is part of a larger aeolian system in the Jomna and Glomma river valleys in southeastern Norway. It is believed to have formed just after the last deglaciation in the area, but no absolute ages have been available to support this. Here, we present a set of quartz optically stimulated luminescence (OSL) ages from the aeolian sediments and the underlying glacifluvial deposits. The results show that the main dune-building phase was a short-lived event similar to 10 ka ago, likely with a duration less than a few hundred years. This suggests a rapid stabilisation of an initially unstable environment in newly deglaciated terrain. A much younger event with limited and surficial reworking of sand is dated to 770 +/- 110 years ago, and the modern age of an active dune provide additional OSL quality control. Age overestimation is found for glacifluvial sediments, probably due to incomplete bleaching as indicated by e.g. scattered dose distributions from small aliquots. OSL measurements were conducted using coarse quartz grains (180-250 m), which show a dominance of a fast signal component. (C) 2015 Elsevier B.V. All rights reserved.

Keywords

  • Geology
  • OSL
  • Eolian
  • Inland dune
  • Holocene
  • Norway

Other

Published
  • Lund Luminescence Laboratory
  • Aeolian activity in Sweden: an unexplored environmental archive
  • Lund Luminescence Laboratory-lup-obsolete
  • ISSN: 1871-1014
Helena Alexandersson
E-mail: helena [dot] alexanderson [at] geol [dot] lu [dot] se

Professor

Quaternary Sciences

+46 46 222 44 83

435

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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.