Viséan

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The Viséan age is the middle of three ages in the Mississippian Epoch of the Carboniferous Period. It lasted from 345.3±2.1 to 326.5±1.6 million years ago. It was preceded by the Tournasian age and followed by the Serpukhovian age.

Carboniferous period
Mississippian Pennsylvanian
Lower/Early Middle Upper/Late Lower/Early Middle Upper/Late
Tournaisian Viséan Serpukhovian Bashkirian Moscovian Kasimovian | Gzhelian