Topic summary
Visean
Extracted from the Wikipedia article Viséan.
The Visean, Viséan or Visian is an age in the ICSgeologic timescale or a stage in the stratigraphic column. It is the second stage of the Mississippian, the lower subsystem of the Carboniferous. The Visean lasted from 346.7 to 330.3 Ma. It follows the Tournaisian age/stage and is followed by the Serpukhovian age/stage.