Abstract

The basal beds on the Shatsky Rise cored during Leg 6 of the Deep Sea Drilling Project are the oldest sediments recovered to date in the Pacific Ocean. Based on benthonic Foraminifera, the sediments correlate with the lower Barremian to upper Hauterivian (Lower Cretaceous) rather than the Upper Jurassic or Lower Cretaceous as previously reported. Thus the oldest sediments presently known from the Pacific Ocean are considerably younger than those in the western North Atlantic Ocean (Oxfordian; Upper Jurassic).

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