Research > Ice free conditions in west-central Sweden in the middle of the last ice age

Ice free conditions in central Sweden in the middle of the last ice age

Fieldwork close to Idre

During my master's thesis I studied a gravel pit close to Idre in northern Dalarna. There sediments deposited when the area was ice-free had been preserved despite a later glaciation. OSL dating of the sediments suggested that the area was ice-free at some point between 50 and 40 thousand years ago, in the middle of the Weichselian ice age. Indications of ice-free periods of approximately this age are known from several sites in north Europe and indicate that the Fennoscandian ice sheet was periodically substantially reduced.

We have also studied this period, called Marine Isotope Stage 3 or MIS 3, in the Baltic Sea. A more general discussion about MIS 3 in Scandinavia is available in this blog post by Barbara Wohlfarth.

Möller, P., Anjar, J. & Murray, A. S. 2013: An OSL-dated sediment sequence at Idre, westcentral Sweden, indicates ice-free conditions in MIS 3. Boreas 42, 25-42. Link

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