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Which geologic period came before the Triassic Period?
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Triassic Period
Distribution of landmasses, mountainous regions, shallow seas, and deep ocean basins during the early Triassic Period. Included in the paleogeographic reconstruction are the locations of the interval's subduction zones.
The geologic period that preceded the Triassic Period was the Permian Period. The Triassic Period began approximately 252 million years ago, marking the close of the Permian and the start of the Mesozoic Era.12