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When did the Emsian Stage occur?
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Devonian Period
Distribution of landmasses, mountainous regions, shallow seas, and deep ocean basins during the early Devonian Period. Included in the paleogeographic reconstruction are the locations of the interval's subduction zones.
The Emsian Stage occurred between 407.6 million and 393.3 million years ago. It represents the uppermost of the three standard worldwide divisions of the Early Devonian Period and follows the Pragian Stage.1