Six Natural Divisions

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Entry Category: Six Natural Divisions - Starting with W

West Gulf Coastal Plain

aka: Gulf Coastal Plain
aka: Coastal Plain
The Gulf Coastal Plain is an area of relatively gently sloping terrain extending across the southern portion of the United States from Texas to Georgia. It was covered by the waters of the Gulf of Mexico until about 50 million years ago. The land rose during periods of tectonic uplift, and water in the Gulf of Mexico retreated to near its present position. Because it was covered by the waters of the Gulf of Mexico for much of its history, the geologic terrain of the Coastal Plain is flat to rolling. Its bedrock is deeply covered with sediment, and the surface has extensive deposits of sand and gravel. The western portion of the Gulf Coastal Plain—the West Gulf Coastal Plain—extends …