The start of the Mesozoic era, 225-190 million years ago. It was the "Age of Reptiles": small dinosaurs, turtles and mammals arose. Pangaea began to split into Laurasia and Gondwanaland. Plants became complex.

Back: Permian On: Jurassic

Tri*as"sic (?), a. Geol.

Of the age of, or pertaining to, the Trias.

--

n.

The Triassic formation.

 

© Webster 1913.

Log in or registerto write something here or to contact authors.