Evidence of changes in surface water temperature and productivity at the Cenomanian/Turonian boundary

Jason W. Eleson, Timothy Bralower

Research output: Contribution to journalArticle

27 Scopus citations

Abstract

Calcareous nannofossil assemblages were investigated across the Oceanic Anoxic Event (OAE) at the Cenomanian/Turonian Boundary (CTB) in a section from the Western Interior Basin and a borehole from the New Jersey coastal plain. The objective was to determine the surface-water response to environmental perturbations during the OAE. A decrease in surface water fertility at the two localities is suggested by an increase in relative abundances of taxa with oligotrophic affinities and a concomitant decrease in taxa with mesotrophic or eutrophic affinities. Oligotrophy and anoxia at both localities are likely responses to increased water-column stratification associated with the incursion of warmer waters from lower latitudes.

Original languageEnglish (US)
Pages (from-to)319-332
Number of pages14
JournalMicropaleontology
Volume51
Issue number4
DOIs
StatePublished - Dec 1 2005

All Science Journal Classification (ASJC) codes

  • Palaeontology

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