Region
North America
2
Albuquerque Basin (N.M.)
1
America
1
Antarctica
1
Baja California (Peninsula)
1
California
1
California, Gulf of
1
Caribbean Area
1
Cuba
1
Dnieper-Donets Basin
1
Gulf States
1
Mexico
1
Mexico, Gulf of
1
Pannonia Region
1
Pripet River Watershed (Ukraine and Belarus)
1
Recôncavo Basin (Brazil)
1
South America
1
Suez, Gulf of, Watershed
1
United States
1