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标题：The Carnian Pluvial Episode and the origin of dinosaurs
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作者：Michael J. Benton ; Massimo Bernardi ; Cormac Kinsella 等
期刊名称：Journal of the Geological Society
印刷版ISSN：0016-7649
电子版ISSN：2041-479X
出版年度：2018
卷号：175
期号：6
页码：1019-1026
DOI：10.1144/jgs2018-049
语种：English
出版社：Geological Society Publishing House
摘要：We present new evidence for a major inflection point in the history of tetrapods on land, a jump in the diversification of archosauromorphs, primarily dinosaurs, at 232–230 Ma. This corresponds to a long-noted changeover in Triassic terrestrial tetrapod faunas from those dominated by synapsids, many of them holdovers from the Permian, to those dominated by dinosaurs. The dinosaur explosion is shown here to correspond in timing to the Carnian Pluvial Episode (CPE), dated at 232 Ma, a time of increased rainfall and perturbation of oceans and atmospheres, followed by substantial aridification. The rock record through the CPE confirms that this event shared many characters with other mass extinctions driven by eruption of large igneous provinces, in this case the Wrangellia flood basalts of the west coast of North America. If this was a catastrophic extinction event, then the environmental perturbations of the CPE explain the sharp disappearance of various terrestrial tetrapods, and the subsequent sharp rise of dinosaurs and perhaps other clades too, especially those that constitute much of the modern terrestrial faunas, such as lissamphibians, turtles, crocodiles, lizards and mammals.