Evidence of changes in surface water temperature and productivity at the Cenomanian/Turonian boundary
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 environment...
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Veröffentlicht in: | Micropaleontology 2005-01, Vol.51 (4), p.319-332 |
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Hauptverfasser: | , |
Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | 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. |
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ISSN: | 0026-2803 1937-2795 |
DOI: | 10.2113/gsmicropal.51.4.319 |