Carbonate Deposits and Paleoclimatic Implications in the Northeast Pacific Ocean.
A narrow carbonate band consisting predominantly of Globigerina-rich sediments is present in the deep-sea deposits of the northeast Pacific Ocean extending almost parallel to the coasts of Oregon and Washington. Five radiocarbon dates in the cores from this area suggest that the greatest concentration of Globigerina-rich sediments occurred 27,000 to 12,000 years ago. This time interval corresponds roughly to the Vashon (late Wisconsin) glacial times in the Puget Lowland. The results suggest higher carbonate sedimentation in the northeast Pacific during glacial stages.
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