Piedmont (United States)

It is situated between the Atlantic Plain and the Blue Ridge Mountains, stretching from New York in the north to central Alabama in the south.

[2] The Atlantic Seaboard Fall Line marks the Piedmont's eastern boundary with the Coastal Plain.

The width of the Piedmont varies, being quite narrow above the Delaware River but nearly 300 miles (475 km) wide in North Carolina.

The last major event in the history of the Piedmont was the break-up of Pangaea, when North America and Africa began to separate.

[4] Many major cities are located on the Atlantic Seaboard fall line, the eastern boundary of the Piedmont.

The fall line, where the land rises abruptly from the coastal plain, marks the limit of navigability on many major rivers, so inland ports sprang up along it.