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When did the Lochkovian 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 Lochkovian Stage, which serves as the lowest division of the Devonian Period, occurred between 419.2 million and 410.8 million years ago.1