Geochemical evidence for suppression of pelagic marine productivity at the Cretaceous/Tertiary boundary

Geochemical evidence for suppression of pelagic marine productivity at the Cretaceous/Tertiary boundary

The normal, biologically productive ocean is characterized by a gradient of the 13C/12C ratio from surface to deep waters. Stable isotope data from planktonic and benthic microfossils across the Cretaceous/Tertiary boundary in the North pacific, which reveal a rapid and complete breakdown in this bi...

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Veröffentlicht in:Nature (London) 1989-01, Vol.337 (6202), p.61-64
Hauptverfasser: Zachos, James C, Arthur, Michael A, Dean, Walter E
Format: Artikel
Sprache:eng
Schlagworte:
Cretaceous
Earth sciences
Earth, ocean, space
Exact sciences and technology
Isotope geochemistry
Isotope geochemistry. Geochronology
Marine
Oceans
Prehistoric era
Productivity
Stable isotopes
Stratigraphy
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Zusammenfassung:The normal, biologically productive ocean is characterized by a gradient of the 13C/12C ratio from surface to deep waters. Stable isotope data from planktonic and benthic microfossils across the Cretaceous/Tertiary boundary in the North pacific, which reveal a rapid and complete breakdown in this biologically mediated gradient, are presented.
ISSN:0028-0836
1476-4687
DOI:10.1038/337061a0