Gzhelian

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The Gzhelian Age is the last of four ages in the Pennsylvanian Epoch of the Carboniferous period. It lasted from approximately 303.9±0.9 to 299.0±0.8 million years ago. It was preceded by the Kasimovian age and followed by the Asselian age of the Cisuralian epoch. This age is named after the town of Gzhel in Russia

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