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.

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

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



The Triassic formation.


© Webster 1913.

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