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The Triassic (/traɪˈæsɪk/ try-ASS-ik; sometimes symbolized ) is a geologic period and system which spans 50.5 million years from the end of the Permian Period ...
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The Triassic is the first geological period in the Mesozoic era and the seventh period of the Phanerozoic eon. It lasted 50.6 million years.
The Upper Triassic is the last epoch in the Triassic period. It began 237 million years ago, and ended 201.3 million years ago. It was after the Middle ...