I am today in Odessa, Texas, here to speak this afternoon at the University of Texas of the Permian Basin.
The reader will begin to think that we have sufficiently "explained" the Permian revolution.
In the marls and sandstones of the Permian period there is also much gypsum.
It will be most convenient to describe the Permian reptiles along with their descendants of the Mesozoic.
Still the Permian has some life features of its own, and we must now turn to these.
Other shells now occur, which have not been observed in strata newer than the Permian.
The upper series is named the Permian, from the province of Perm in Russia.
In the eastern Carpathians also, the Permian and Mesozoic beds are not much folded except near the outer margin of the zone.
Proreptilia are represented by the Permian genera Eryops and Cricotus.
Hence, uplift alone cannot account for extensive glaciation in subtropical latitudes during the Permian and Proterozoic.
1841, "pertaining to the uppermost strata of the Paleozoic era," named by British geologist Sir Roderick Impey Murchison (1792-1871) for the region of Perm in northwestern Russia, where rocks from this epoch are found.
The seventh and last period of the Paleozoic Era, from about 286 to 245 million years ago. During the Permian Period the supercontinent Pangaea, comprising almost all of today's landmasses, formed. Gymnosperms evolved, the first modern conifers appeared, and reptiles diversified. The Permian Period ended with the largest known mass extinction in the history of life. It wiped out nearly 90 percent of known marine life forms. See Chart at geologic time.