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

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Abstract

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.

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Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Geology

Keywords

  • OSL, Eolian, Inland dune, Holocene, Norway
Original languageEnglish
Pages (from-to)175-180
JournalQuaternary Geochronology
Volume30
Publication statusPublished - 2015
Publication categoryResearch
Peer-reviewedYes

Related projects

Helena Alexanderson, Martin Lund, Edyta Kalinska-Nartisa & Sara Florén

Geological Survey of Sweden

2013/01/012016/12/31

Project: ResearchNational collaboration

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