Appalachian Plateau
The western part of the Appalachian mountain system, stretching from New York to Alabama. The sedimentary rock that underlies the region eroded to form broad-topped plateaus and deep, narrow valleys. It resembles the adjacent Ridge and Valley region except that its plateaus are broader. The southern portion is called the Cumberland Plateau, and the northern, the Allegheny Plateau. The mountains in the region are less than 5,000 feet high. There are several local names for the mountains, many of which Easterners will recognize as favorite vacation spots. These include the Catskills, the Poconos, the Finger Lakes area, and the Allegheny Mountains.
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