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

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

Standard

A short-lived aeolian event during the Early Holocene in southeastern Norway. / Alexanderson, Helena; Henriksen, Mona.

I: Quaternary Geochronology, Vol. 30, 2015, s. 175-180.

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

Harvard

APA

CBE

MLA

Vancouver

Author

RIS

TY - JOUR

T1 - A short-lived aeolian event during the Early Holocene in southeastern Norway

AU - Alexanderson, Helena

AU - Henriksen, Mona

PY - 2015

Y1 - 2015

N2 - 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.

AB - 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.

KW - OSL

KW - Eolian

KW - Inland dune

KW - Holocene

KW - Norway

U2 - 10.1016/j.quageo.2015.02.014

DO - 10.1016/j.quageo.2015.02.014

M3 - Article

VL - 30

SP - 175

EP - 180

JO - Quaternary Geochronology

JF - Quaternary Geochronology

SN - 1871-1014

ER -