411 REFERENCE · Wiktionary
Permian-Triassic extinction
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Proper noun
en evolutionary theory geology A volcanic mass extinction at the end of the Permian period 251.9 million years ago.
en Great Dying Permian-Triassic extinction event Permian-Triassic mass extinction end-Permian extinction end-Permian extinction event end-Permian mass extinction
en mass extinction extinction event extinction-level event
en late-Ordovician extinction Triassic-Jurassic extinction Cretaceous-Paleogene extinction Holocene extinction Anthropogene extinction