Reports

Tertiary Climatic Change in the Marginal Northeastern Pacific Ocean

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Science  08 Aug 1969:
Vol. 165, Issue 3893, pp. 583-585
DOI: 10.1126/science.165.3893.583

Abstract

Analysis of distributional patterns of shallow-water molluscan faunas of the middle latitudes of the marginal northeastern Pacific Ocean discloses a sharp reversal during the Miocene of the progressive climatic deterioration. A low point in the Tertiary cooling trend during the Oligocene was followed by climatic warming that culminated during the middle Miocene, as illustrated by a series of zoogeographic profiles.