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Pennsylvanian


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1 The late Carboniferous sub-period, preceded by the Mississippian, comprising the Bashkirian, Moscovian, Kasimovian, and Gzelian Epochs, and dated at 318.1–299.0 Ma.

2 The name of the corresponding North American subsystem, comprising the Morrowan, Atokan (Derryan), Desmoinesian, Missourian, and Virgilian Series, and roughly contemporaneous with most of the Silesian subsystem (i.e. above Namurian A).

Subjects: Earth Sciences and Geography — Ecology and Conservation.


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