1 The Early Carboniferous subperiod which is followed by the Pennsylvanian and comprises the Tournaisian, Visean, and Serpukhovian Epochs. It is dated at 359.2–318.1 Ma (Int. Commission on Stratigraphy, 2004).
2 The name of the corresponding N. American sub-system which comprises the Kinderhookian, Osagean, Meramecian, and Chesterian Series. It is roughly contemporaneous with the Dinantian plus the Namurian A of western Europe.
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