Permian

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Permian

of, denoting, or formed in the last period of the Palaeozoic era, between the Carboniferous and Triassic periods, which lasted for 60 000 000 years

Permian

[′pər·mē·ən]
(geology)
The last period of geologic time in the Paleozoic era, from 280 to 225 million years ago.