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Earth Sciences 17 Online
OpenStudy (anonymous):

What was the Permian Extinction?

OpenStudy (raymonde20):

I got this:

OpenStudy (raymonde20):

The Permian–Triassic (P–Tr) extinction event, colloquially known as the Great Dying or the Great Permian Extinction, 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.

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