Out with a whimper not a bang
- 1 January 1981
- journal article
- other
- Published by Cambridge University Press (CUP) in Paleobiology
- Vol. 7 (3) , 293-298
- https://doi.org/10.1017/s0094837300004589
Abstract
The recurring debate over the causes of the massive extinctions of such groups as the dinosaurs, ammonites, and calcareous nannoplankton, and the crash of the distinctive Aquilapollenites pollen province, used by biostratigraphers to mark the close of the Cretaceous, has been considerably enlivened with the resurgence of hypotheses suggesting catastrophic events. The impact of an asteroid, explosion of a supernova, sudden changes in oceanic circulation and composition, or atmospheric perturbations, to mention a few, have been put forward as malefactors. But, just how sound is the evidence of a biotic catastrophe?Keywords
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