Late Weichselian glaciation and deglaciation of Forlandsundet area, western Spitsbergen, Svalbard |
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Authors: | STEVEN L FORMAN |
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Institution: | Center for Geochronological Research, Institute of Arctic and Alpine Research, University of Colorado, Boulder, Colorado 80309–0450, U.S.A |
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Abstract: | Late Weichselian glacier limits for the Forlandsundet area, western Spitsbergen are reconstructed from the stratigraphic distribution of tills and deglacial deposits, variations in the altitude of the marine limit, distribution of pre-Late Weichselian raised beach deposits, and the rare occurrence of moraines and striated bedrock. The Late Weichselian glaciation was primarily a local event with fjord outlet-glaciers expanding no more than 15 km beyond their present position; cirque glaciers were similar to their neoglacial limits. A previously reconstructed ice sheet centered over the Barents Shelf had little direct influence on the glaciation of the Forlandsundet area. Glacier retreat began at or prior to 10.5 ka ago and possibly as early as 13 ka ago with fjords mostly, and perhaps rapidly deglaciated by 10 to 9 ka ago. |
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