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ODP Leg 105 drilled three sites (645, 646, 647) in Baffin Bay and the Labrador Sea. Paleontologic correlations with regional seismic reflectors established that glacial ice-rafting in the region started about 2.5 Ma (possibly as early as 3.4 Ma in Baffin Bay). Southward directed bottom water circulation in Baffin Bay started in early to mid-Miocene, while major drift sedimentation at Site 646 (Labrador Sea) started in the late Miocene. The opening of Baffin Bay occurred between 55 and 36 Ma. Oceanic crust at Site 647 (Labrador Sea) was dated as early Eocene in age (55-56 Ma, Chron 24).

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