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Norsk Geologisk Tidsskrift. Four consistent radiocarbon dates on terrestrial plant remains from the lacustrine sediments yielded an age of 10, calibrated years BP cal years BP. This is the first accurate and precise age obtained for the deglaciation of the Mjøsa region in eastern Norway.

We estimate that the ice-margin retreat rate in this area was about m per year.

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Light-demanding herbs and Hippophaë rhamnoides were the first to colonise locally. When soils matured, birch immigrated to the area forming the first forests at around 10, cal years BP. This was rapidly followed by pine and aspen and, later, by black alder at c.

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The lacustrine sediments are covered by 50 cm speed dating norway flora peat and capped by a two-metre thick, coarse-grained, debris-flow deposit. The latter was surprising because of the very gentle slopes, four degrees in the failure area and less loppa dating three in the run-out and depositional area.

We propose that the landslide, postdating the top of the peat that is dated to cal years BP, was triggered by a strong earthquake.

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