Rocky Mountains and Appalachian Mountains.
The Rocky Mountains and the Appalachian Mountains.
Appalachian Mountains and the Rocky Mountains
The Rockies!
The Rocky Mountains and the Appalachian Mountains.
Rocky mountains and the Appalachian mountains
The Rocky Mountains and the Appalachian Mountains.
Appalachian and Rocky Mountains.
Rocky Mountains --->Great Plains--->Mississippi River---> Appalachian Mountains
Appalachian Mountains and Rocky Mountains
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1.Appalachian Mountains 2.Rocky Mountains