Gulf Coastal Plain

The Gulf Coastal Plain extends from the Florida Parishes of Louisiana over most of Mississippi, some of western Tennessee and Kentucky, the southwestern 2/3 of Alabama, and the western Florida Panhandle and Southern Texas. Its southern boundary is the Gulf of Mexico and its western boundary the drop into the Mississippi embayment. On the north it extends to the highlands of the Interior Low Plateaus and southern Appalachian Mountains. To the east, there is an arbitrary break with the South Atlantic Coastal Plain at the Alabama-Georgia border south in Florida along the Apalachicola River. The flat to rolling topography is broken by numerous streams and river bottoms.

Text taken from the public domain United States Bureau of Land Management website.