Late Weichselian paleooceanography of the southeastern Norwegian Sea
Jansen, E.; Sejrup, H.P.; Fjæran, T.; Hald, M.; Holtedahl, H.; Skarbø, O. (1983). Late Weichselian paleooceanography of the southeastern Norwegian Sea. Norsk Geol. Tidsskr. 63(2-3): 117-146
In: Norsk geologisk tidsskrift. Norwegian Geological Society: Trondheim. ISSN 0029-196X; e-ISSN 1502-5322, more
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| Keywords |
Correlation > Geological correlation > Stratigraphic correlation
Fossils > Animal fossils > Fossil foraminifera
Marine/Coastal |
| Authors | | Top |
- Jansen, E.
- Sejrup, H.P.
- Fjæran, T.
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- Hald, M.
- Holtedahl, H.
- Skarbø, O.
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| Abstract |
Downcore analyses of variations in planktonic and benthic foraminiferal distribution, sedimentology and stable isotopes in cores from the deep ocean basin and the continental slope of the southeastern Norwegian Sea show that the last glacial to postglacial transition occurred in two distinct steps. Prior to 13,000 BP the area was characterized by a year-round iceberg and pack-ice environment, low surface productivity and homogenous, low productivity deep water conditions. After ca. 13,000 BP the ocean became seasonally ice free with high productivity and low-scale vertical circulation. The surface remained cold until after 10,000 BP, in contrast to the warm North Atlantic during the period 13,000-11,000 BP. In this period benthic foraminifera indicate presence of stratified deep-waters dissimilar to the present. Two possible patterns of deep water exchange are presented. |
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