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Which stage lies directly below the Asselian Stage of the Permian Period?
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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 stage that lies directly below the Asselian Stage is the Gzhelian Stage.12
The Gzhelian Stage is the final stage of the Pennsylvanian Subsystem within the Carboniferous Period. The boundary between the Gzhelian and the overlying Asselian Stage marks the transition between the Carboniferous and Permian periods.23