Environmental Protection Agency Narragansett Bay Commission University of Rhode Island Office of Marine Programs

Estuarine Science

Estuaries Classified by Geologic Features

Estuaries can be described by how they were formed or by the characteristics of their circulation. This classification of estuaries is based on geologic features. Classifications include coastal plain estuaries, tectonic estuaries, bar-built estuaries, and fjords.





Coastal Plain



Tectonic



Bar-Built


Fjord


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Estuaries of the World
Estuaries Classified by Geologic Features

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