0 from or referring to the period of time between about 290 and 250 million years ago, in which large reptiles and amphibians appeared, and that ended with most species on earth becoming extinct (= dying out completely):
1 the period of time between about 290 and 250 million years ago, in which large reptiles and amphibians appeared, and that ended with most species on earth becoming extinct (= dying out completely):
The great mass extinction of the late Permian almost ended animal life because of high temperatures.
The cores date from the end of the Permian but were identified as volcanic.
Many fossils of sea animals have been located in Carboniferous and Permian rocks from this province.
The Permian extinction is obviously the most interesting.
That distinction belongs to the end of the Permian period, some 250m years ago.
At the close of the Permian, most of the Earth's land was in one massive continent, Pangea.
During the remainder of the Permian, the basins were filled to the brim and the uplifted areas were buried.
The remaining reptiles were probably left over from the Permian and some were the ancestors of the dinosaurs and other reptiles of later Mesozoic times.
