Cumberland Plateau

Westernmost of three divisions of the Appalachian Mountains, U.S., extending southwestward for 450 miles (725 km) from southern West Virginia to northern Alabama. The plateau is 40 to 50 miles (65 to 80 km) wide and lies between the Appalachian Ridge and Valley region to the east and the rolling plains to the west. It merges with the Allegheny Plateau on the north and with the Gulf Coastal