U.S. Geological Survey

Multiproxy Record of the
Last Interglacial (MIS 5e) off
Central and Northern California, U.S.A.,
from Ocean Drilling Program Sites 1018 and 1020

By R.Z. Poore, H.J. Dowsett, J.A. Barron, L. Heusser, A.C. Ravelo, and A. Mix

U.S. Geological Survey Professional Paper 1632

Version 1.0

Environmental and climatic conditions during the last interglacial (about 125,000 years ago) along the central and northern California coastal region are interpreted from study of marine cores recovered by the Ocean Drilling Program at Sites 1018 and 1020. Marine microfossil and pollen assemblages, oxygen isotopes in benthic foraminifers, physical properties, and calcium carbonate contents of cored sediments are proxies indicating strong links between the marine and terrestrial environments during marine isotope stage 5 (MIS 5). At the beginning of the last interglacial (MIS 5e), reduction in global ice volume, increase in sea-surface temperature, and warming of air temperature along the central and northern California coast were synchronous within the resolution of our sampling record.

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