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Appalachian Mountains - Wikipedia
Appalachian Mountains | Definition, Map, Location, Trail, & Facts
Appalachian Mountains - WorldAtlas
Geology of the Appalachians - Wikipedia
Bend in Appalachian mountain chain finally explained
Appalachian Mountains - Students | Britannica Kids | Homework …
Geology and Wildlife of the Appalachian Mountains - ThoughtCo
United States - Appalachians, Geology, Ecology | Britannica
The evolution of the Appalachian chain - GeoScienceWorld
Appalachian Mountains - New World Encyclopedia