From 190 million to 230 million years ago; dinosaurs, marine reptiles; volcanic activity; Also called: Triassic period.
Period of geological time 245–208 million years ago, the first period of the Mesozoic era. The continents were fused together to form the world continent Pangaea. Triassic sediments contain remains of early dinosaurs and other reptiles now extinct. By late Triassic times, the first mammals had evolved.