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Helena Alexandersson

Helena Alexanderson

Professor

Helena Alexandersson

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

Författare

  • Helena Alexanderson
  • Mona Henriksen

Summary, in 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.

Avdelning/ar

  • Kvartärgeologi

Publiceringsår

2015

Språk

Engelska

Sidor

175-180

Publikation/Tidskrift/Serie

Quaternary Geochronology

Volym

30

Dokumenttyp

Artikel i tidskrift

Förlag

Elsevier

Ämne

  • Geology

Nyckelord

  • OSL
  • Eolian
  • Inland dune
  • Holocene
  • Norway

Status

Published

Projekt

  • Lund Luminescence Laboratory
  • Aeolian activity in Sweden: an unexplored environmental archive

Forskningsgrupp

  • Lund Luminescence Laboratory

ISBN/ISSN/Övrigt

  • ISSN: 1871-1014