Eocene-Oligocene Paleoceanography

  1. Kenneth J. Hsü
  1. Bruce H. Corliss and
  2. Lloyd D. Keigwin Jr.

Published Online: 15 MAR 2013

DOI: 10.1029/GD015p0101

Mesozoic and Cenozoic Oceans

Mesozoic and Cenozoic Oceans

How to Cite

Corliss, B. H. and Keigwin, L. D. (1986) Eocene-Oligocene Paleoceanography, in Mesozoic and Cenozoic Oceans (ed K. J. Hsü), American Geophysical Union, Washington, D. C.. doi: 10.1029/GD015p0101

Author Information

  1. Department of Geology, Duke University, Durham, NC 27708 and Woods Hole Oceanographic Institution, Woods Hole, MA 02543

Publication History

  1. Published Online: 15 MAR 2013
  2. Published Print: 1 JAN 1986

Book Series:

  1. Geodynamics Series

ISBN Information

Print ISBN: 9780875905150

Online ISBN: 9781118669914



  • Paleoceanography—Congresses;
  • Geology, Stratigraphic—Mesozoic—Congresses;
  • Geology, Stratigraphic—Cenozoic—Congresses;
  • Paleo-climatology—Congresses;
  • Ocean circulation—Congresses


Recent studies of Eocene-Oligocene paleoceanography based on the analysis of deep-sea microfossils are reviewed. Distinct changes in foraminiferal stable isotope compositions and biotic patterns occurred in the ocean near the Eocene/Oligocene boundary, but the data do not suggest a catastrophic extinction event took place at this time. The geological events can best be explained in terms of changing paleoceanographic and paleoclimatic conditions and do not support a bolide impact event having a major influence on the earth's biosphere near the boundary. The lack of a mass extinction of marine microfossils at the Eocene/Oligocene boundary argues against the existence of 26 m.y. cyclicity of extinctions in the Cenozoic.