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Geophysical Monograph Series

 

Keywords

  • Carbon cycle (Biogeochemistry)—Congresses
  • Atmospheric carbon dioxide—Congresses
  • Geological time—Congresses
  • Paleothermometry—Congresses
  • Geology, Stratigraphic—Congresses

Article

GEOPHYSICAL MONOGRAPH SERIES, VOL. 32, PP. 487-492, 1985

A “Strangelove” ocean in the earliest Tertiary

K. J. Hsü and J. A. McKenzie

A decrease of up to 3°/oo in the δ13 C values of planktic skeletons has been systematically observed across the Cretaceous/Tertiary boundary; the benthic skeletons show no corresponding changes. We interpret this decrease as a manifestation of the elimination of the surface-to-bottom carbon isotope gradient in ocean waters at a time when carbon fractionation by a photosynthesis-respiration mechanism became ineffective. A concurrent release of excess CO2 from a nearly barren ocean to the atmosphere could have caused global warming.

Citation: Hsü, K. J., and J. A. McKenzie (1985), A “Strangelove” ocean in the earliest Tertiary, in The Carbon Cycle and Atmospheric CO2: Natural Variations Archean to Present, Geophys. Monogr. Ser., vol. 32, edited by E. T. Sundquist and W. S. Broecker, pp. 487–492, AGU, Washington, D. C., doi:10.1029/GM032p0487.

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