Radiocarbon datings and glacial striae from the inner part of Boknfjord area, South Norway

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Abstract
Whale bones overlain by moraine at Borgøy island have been dated to 12,380 ± 150 B.P. At Tveit, further east, whale bones overlain by littoral material were dated to 11,970 ± 100 B.P. These datings, together with the glacial striae in the area, show that Borgøy was covered by ice during a glacial advance at about Older Dryas Chronozone, while Tveit was not, and that a calving bay existed in the inner part of the Boknfjord area at the same time. At the mouth of Vindafjord, east of Tveit, and 3-4 km outside terminal moraines of Younger Dryas age, shells overlain by ground moraine were dated to 11,630 ± 100 B.P. This shows that the ice front in an early phase of the Younger Dryas glacial advance was situated at least 3–4 km beyond the pronounced Ra moraines in Vindafjord. The main trend of the shore line displacement between 12,000 and 9,500 B.P., based upon the whale bones and earlier investigations, can be established.

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