Piedmont (United States)

Piedmont is the region of the eastern United States of America which lies between the coastal plain, from which it is divided by the fall line, and the eastern mountain ranges, the Appalachian Mountains. The width of the Piedmont varies, being quite narrow or vanishing above the Delaware River, but nearly 300 miles wide in the State of North Carolina.

The surface relief of the Piedmont is characterized by relatively low, rolling hills with heights between 200 and 800-1000 feet above sea level. Its geology is complex, with numerous rock formations of different materials and ages intermingled with one another.