Abrupt and Gradual Extinction Among Late Permian Land Vertebrates in the Karoo Basin, South Africa

  title={Abrupt and Gradual Extinction Among Late Permian Land Vertebrates in the Karoo Basin, South Africa},
  author={Peter D. Ward and Jennifer Botha and Roger Buick and M. de Kock and Douglas H. Erwin and Geoffrey Garrison and Joseph L. Kirschvink and Roger M. H. Smith},
  pages={709 - 714}
The Karoo basin of South Africa exposes a succession of Upper Permian to Lower Triassic terrestrial strata containing abundant terrestrial vertebrate fossils. Paleomagnetic/magnetostratigraphic and carbon-isotope data allow sections to be correlated across the basin. With this stratigraphy, the vertebrate fossil data show a gradual extinction in the Upper Permian punctuated by an enhanced extinction pulse at the Permian-Triassic boundary interval, particularly among the dicynodont therapsids… 
Comment on "Abrupt and Gradual Extinction Among Late Permian Land Vertebrates in the Karoo Basin, South Africa"
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