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bn:01820445n
Noun Concept
SYL
No term available
EN
Approximately 251.9 million years ago, the Permian–Triassic extinction event forms the boundary between the Permian and Triassic geologic periods, and with them the Paleozoic and Mesozoic eras respectively. Wikipedia
Relations
Sources
IS A
EN
extinction event
EN
phenomenon
DESCRIBED BY SOURCE
EN
Britannica.com Inc.
FOLLOWED BY
EN
Mesozoic
FOLLOWS
EN
Paleozoic

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