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When did the Tournaisian Stage occur?
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Carboniferous Period
Distribution of landmasses, mountainous regions, shallow seas, and deep ocean basins during the late Carboniferous Period. Included in the paleogeographic reconstruction are the locations of the interval's subduction zones.
The Tournaisian Stage, which is the first of three stages of the Mississippian Subsystem within the Carboniferous Period, occurred from approximately 358.9 million to 346.7 million years ago.1