Early Pennsylvanian
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The Early Pennsylvanian (also known as the Lower Pennsylvanian) is the first of three subepochs of the Pennsylvanian epoch of the Carboniferous period. It spans the time between 318.1 ± 1.3 Ma and 311.7 ± 1.1 Ma (million years ago). It has one faunal stage, the Bashkirian.

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References

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