Deglaciation history of the southwestern Fennoscandian Ice Sheet between 15 and 13 14CkaBP ATLE NYGA˚ RD, HANS PETTER SEJRUP, HAFLIDI HAFLIDASON, MARCELLO CECCHI AND DAG OTTESEN Nyga˚rd, A., Sejrup, H. P., Haflidason, H., Cecchi, M. & Ottesen, D. 2004 (February): Deglaciation history of the southwestern Fennoscandian Ice Sheet between 15 and 13 14C ka BP. Boreas, Vol. 33, pp. 1–17. Oslo. ISSN 0300-9483. Analysis of 2D and 3D seismic records from the continental shelf off western Norway, in combination with chronological constraints from 14C dates, has led to a model for the glacial development in these shelf areas between c. 15 and 13 14C ka BP. On the shallow Ma˚løy Plateau adjacent to the Norwegian Channel, iceberg scours are preserved below a prominent moraine ridge, which by correlation to the Norwegian Channel indicate ice retreat at c.1514C ka BP. Subsequently, the ice advanced across the scoured surface and deposited a till sheet before stabilizing to deposit a prominent moraine, termed the Bremanger Moraine. Based on location on the shelf, seismic stratigraphy, morphology and 14C dates the Bremanger Moraine is correlated with a significant moraine on the continental shelf off Trøndelag. We suggest that these features are products of a regional glacial event, the Bremanger Event, dated to <15 – 13.3 14C ka BP. The Bremanger Event is probably a result of the deteriorating climatic conditions in the NE Atlantic during Heinrich event 1. Atle Nyga˚rd (e-mail:
[email protected]), Hans Petter Sejrup, Haflidi Haflidason, Department of Earth Science, University of Bergen, Alle´gaten 41, NO-5007 Bergen, Norway; Marcello Cecchi, Enterprise Oil Norway, Stavanger.