26. SYNTHESIS OF OXYGEN AND CARBON ISOTOPIC RESULTS FROM SITE 704: IMPLICATIONS FOR MAJOR CLIMATIC-GEOCHEMICAL TRANSITIONS DURING THE LATE NEOGENE1

Composite oxygen and carbon isotopic records of planktonic and benthic foraminifers and fine-fraction (<63 µm) carbonate were used to identify major paleoceanographic events in subantarctic surface and deep waters during the past 10 Ma. The late Neogene record of the subantarctic Southern Ocean i...

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Bibliographic Details
Main Authors: David A. Hodell, Daniel W. Muller, Paul F. Ciesielski, Gregory A. Mead
Other Authors: The Pennsylvania State University CiteSeerX Archives
Format: Text
Language:English
Subjects:
Southern Ocean
Online Access:http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.547.4343
http://www-odp.tamu.edu/publications/114_SR/VOLUME/CHAPTERS/sr114_26.pdf
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Summary:Composite oxygen and carbon isotopic records of planktonic and benthic foraminifers and fine-fraction (<63 µm) carbonate were used to identify major paleoceanographic events in subantarctic surface and deep waters during the past 10 Ma. The late Neogene record of the subantarctic Southern Ocean is marked by progressive intensification of glacial-interglacial cycles, migrations of the Polar Front Zone, and changes in deep-water circulation. The two most important times of rapid paleoceanographic change occurred during the late Miocene (between 6.4 and 4.8 Ma) and late Pliocene (especially at —2.5 Ma).

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