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Science 9 November 1984:
Vol. 226. no. 4675, pp. 692 - 694
DOI: 10.1126/science.226.4675.692
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Articles

Covariance Patterns of Foraminiferal dgr18O: An Evaluation of Pliocene Ice Volume Changes Near 3.2 Million Years Ago

WARREN L. PRELL 1

1 Department of Geological Sciences, Brown University, Providence, Rhode Island 02912

Oxygen isotope data for a Pliocene interval from 3.6 to 2.8 million years ago show a mean increase (0.5 per mil) of benthic dgr18O at about 3.2 million years ago, whereas planktic dgr18O does not increase. This lack of covariance indicates that the event at 3.2 million years did not result in a permanent increase in the ice budget of either the Northern or the Southern Hemisphere.

Submitted on May 9, 1984
Accepted on July 16, 1984


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