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The surface relief of the Piedmont is characterized by relatively low, rolling hills with heights above sea level between 50 m (200 feet) and 250 m to 300 m (800 feet to 1000 feet). Its geology is complex, with numerous rock formations of different materials and ages intermingled with one another. Basically the Piedmont is the roots of an ancient coastal mountain chain that is now worn down to low relief.
United States geography