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Corey Sevier's birth name is Corey Daniel Sevier.
Mountains are formed by the process of orogeny.
you sevier is not French.
It is the Appalachian Mountians. Which consist of: Taconic Orogeny (Ordovician);Acadian Orogeny (Devonian);Caledonian Orogeny (Silurian); Allegheny Orogeny (Pennsylvanian & Permian).
Valentine Sevier died in 1800.