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Why are pennysylvanians and mississppians Periods named after the US states?
Wiki User
∙ 14y ago
The Pennsylvanian and Mississippian are sub divisions of the Carboniferous Period and in North America comprise marine limestones, while in Europe (where the Carboniferous was first described), the equivalent rocks form one more-or-less continuous sequence of lowland continental deposits. The Pennsylvanian and Mississippian are therefore worthy of separate description and are named after the US states in which they have their greatest outcrops.
Wiki User
∙ 14y ago
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