Impact Theory of Mass Extinctions and the Invertebrate Fossil Record

@article{Alvarez1984ImpactTO,
  title={Impact Theory of Mass Extinctions and the Invertebrate Fossil Record},
  author={Walter Alvarez and Erle G. Kauffman and Finn Surlyk and Luis W. Alvarez and Frank. Asaro and Helen V. Michel},
  journal={Science},
  year={1984},
  volume={223},
  pages={1135 - 1141}
}
There is much evidence that the Cretaceous-Tertiary boundary was marked by a massive meteorite impact. Theoretical consideration of the consquences of such an impact predicts sharp extinctions in many groups of animals precisely at the boundary. Paleontological data clearly show gradual declines in diversity over the last 1 to 10 million years in various invertebrate groups.Reexamination of data from careful studies of the best sections shows that, in addition to undergoing the decline, four… 

A Geochemical Perspective on the Causes and Periodicity of Mass Extinctions

Evidence that extraordinary tectonism took place prior to and at the Cretaceous–Tertiary boundary (K–TB) is sufficient to account for the environmental changes that led to mass extinctions.

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  • Geography, Environmental Science
  • 1990
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  • Environmental Science
    Paleobiology
  • 1989
High-resolution stratigraphic analysis of 18 sections spanning the Cenomanian–Turonian Stage boundary in the western interior of the United States has allowed determination of the magnitude and

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  • T. Hansen
  • Environmental Science, Geography
  • 1987
The Eocene-Oligocene boundary is widely cited as the "other" example (besides the Cretaceous-Tertiary boundary) of a known relationship between mass extinctions and bolide impacts. The stratigraphic

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...

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