Within his 1958 study recognizing biological turnover between the Triassic and Jurassic, Edwin H.
Colbert's 1958 proposal was that this extinction was a result of geological processes decreasing the diversity of land biomes.
Brachyopoids, for example, survived until the Cretaceous according to new discoveries in the 1990s.
Such an impact has been observed in the present day, when Comet Shoemaker-Levy 9 broke up and hit Jupiter in 1992.
Sambrotto |date = March 22, 2010 |title= Compound-specific carbon isotopes from Earth's largest flood basalt eruptions directly linked to the end-Triassic mass extinction |journal=
Gerrothorax, the last known plagiosaurid, has been found in rocks which are probably (but not certainly) Rhaetian, while a capitosaur humerus was found in Rhaetian-age deposits in 2018.
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