Journal
SCIENCE
Volume 307, Issue 5710, Pages 709-714Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1107068
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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, coinciding with negative carbon-isotope anomalies.
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