Deglaciation history and post-glacial mass movements in Balsfjord, northern Norway

The deglaciation history of Balsfjord, northern Norway, and post-glacial mass movement events were investigated. Radiocarbon dates indicate that the Balsfjord glacier retreated from the Tromsø–Lyngen moraines about 10.4 14C Ky BP. Between ca. 10.3 14C Ky BP and 9.9 14C Ky BP, deposition of a distinc...

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Bibliographic Details
Published in:Polar Research
Main Authors: Forwick, Matthias, Vorren, Tore O.
Format: Article in Journal/Newspaper
Language:English
Published: Norwegian Polar Institute 2002
Subjects:
Norway
Tromsø
Balsfjord
Skjevelnes
glacier
Northern Norway
Polar Research
Lyngen
Online Access:https://polarresearch.net/index.php/polar/article/view/2142
https://doi.org/10.3402/polar.v21i2.6486
Description
Summary:The deglaciation history of Balsfjord, northern Norway, and post-glacial mass movement events were investigated. Radiocarbon dates indicate that the Balsfjord glacier retreated from the Tromsø–Lyngen moraines about 10.4 14C Ky BP. Between ca. 10.3 14C Ky BP and 9.9 14C Ky BP, deposition of a distinct end moraine–the Skjevelnes moraine–in the central part of Balsfjord occurred. The transition from glacimarine to open marine sedimentary environment took place before 9.6 14C Ky BP. Between ca. 9.5 14C Ky BP and 8.4 14C Ky BP, at least one local and three regional mass movement events occurred. After this period, no gravity flow activity is preserved in the cores. The high frequency of mass movements in the early post-glacial period is presumed to be due to fast sea level changes and/or tectonic activity induced by rapid isostatic uplift.

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