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Permian–Triassic extinction event #
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The Permian–Triassic (P–Tr) extinction event, colloquially known as the Great Dying, the End Permian or the Great Permian Extinction, 페름기 대멸종, 페름기-트라이아스기 멸종 occurred about 252 Ma (million years) ago, forming the boundary between the Permian and Triassic geologic periods, as well as the Paleozoic and Mesozoic eras. (–Triassic_extinction_event)


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