International Geologiical Congress - Oslo 2008

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OSP-01 General contributions to marine geoscience & paleoceanography

 

Laminated sediments in the Southern Norwegian Sea during the last three climate cycles

 

Christine Zühlsdorff, University of Bergen (Norway)
Haflidi Haflidason, University of Bergen (Norway)
Hans Petter Sejrup, University of Bergen (Norway)
Jo Brendryen, University of Bergen (Norway)
Kristin Grasmo, University of Bergen (Norway)
 

 

Laminated sediments in the North Atlantic realm and along the Celtic margin are discussed as remnants from ice sheet decay of the British and Scandinavian Ice Sheet (e.g., S. Zaragosi et al., 2001; W. Lekens et al., 2005; F. Eynaud et al., 2007). Many sediment records recovered from these areas indicate that a major melting event occurred during Termination I. The discussion for older terminations in literature is limited, since until recently only one sediment core from the Celtic margin preserves a record, which reaches back to MIS 9 (F. Eynaud et al., 2007). Now, laminated sediments for the last three climate cycles are also observed in a sediment record from the Southern Norwegian Sea. Laminated sequences within sediment core MD99-2288/89, which are visible in x-rays, are observed during Termination I as well as during MIS 5 and MIS 7. Having good age control on these laminated sediments, an integrated sedimentological and micropalaeontological study aims now to provide further details on sedimentation processes and ice sheet evolution during the last three climate cycles.

 

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