GEOPHYSICAL MONOGRAPH SERIES, VOL. 32, PP. 487-492, 1985
A “Strangelove” ocean in the earliest Tertiary
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