1 The final epoch in the Mississippian, comprising the Pendleian, Arnsbergian, Chokierian, and Alportian Ages (these are also stage names in western European stratigraphy). The Serpukhovian is preceded by the Visean, followed by the Bashkirian (Pennsylvanian), and dated at 326.4–318.1 Ma (Int. Commission on Stratigraphy, 2004).
2 The name of the corresponding eastern European series, which is roughly contemporaneous with the upper Chesterian (N. America) and Namurian A (western Europe).
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