It will be most convenient to describe the Permian reptiles along with their descendants of the Mesozoic.
The one is the twilight of the Palozoic day, the other is the dawn of the Mesozoic.
The ore veins of the various minerals are about as likely to be found in Tertiary or Mesozoic as in the Palæozoic.
In so far as we know, it remained for the Mesozoic to introduce the birds and mammals.
Cretaceous , that period of the Mesozoic era that gave rise to the primitive mammals.
This following Mesozoic time must next engage our attention.
In the eastern Carpathians also, the Permian and Mesozoic beds are not much folded except near the outer margin of the zone.
These were the Pterodactyles, the reptile bats of the Mesozoic.
The Mesozoic time certainly terminated with the Cretaceous, and what follows belongs to a distinct aeon.
In conclusion, brief mention may be made of the kind of climate of the Mesozoic era.
The era of geologic time from about 245 to 65 million years ago. The Mesozoic Era was characterized by a drastic change in plants and animals. In the early part of the Mesozoic, ferns, cycads, and ginkgos were dominant; later, gymnosperms and angiosperms developed. Dinosaurs also first appeared in the Mesozoic and, with the exception of birds, became extinct at the end of the era. See Chart at geologic time.