Early Paleogene benthic foraminiferal assemblages and stable isotopes in the Southern Ocean

M. E. Katz, K. G. Miller

Research output: Contribution to journalArticle

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Abstract

Previous studies document that a major benthic foraminiferal crisis occurred in the latest Paleocene in the Atlantic, Caribbean, and Pacific; a similar faunal turnover occurred in the latest Paleocene throughout the Atlantic sector of the Southern Ocean. At the Leg 114 sites, Stensioina beccariiformis-dominated assemblages were replaced by Nuttallides truempyi-dominated assemblages just prior to the Paleocene/Eocene boundary. The benthic foraminiferal crisis may have been caused by deep-water warming, a drop in food supply, or changing deep-water source regions. Oxygen isotope data show that there is no clear correlation between δ18O changes and extinctions. Similarly, most of the extinctions occurred well after the start of the drop in global 8d13C values, which may, in part, reflect a decrease in productivity. -from Authors

Original languageEnglish (US)
Pages (from-to)481-512
Number of pages32
JournalUnknown Journal
StatePublished - Jan 1 1991

All Science Journal Classification (ASJC) codes

  • Environmental Science(all)
  • Earth and Planetary Sciences(all)

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