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Where are fjord estuaries especially common?

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Diagram showing four main types of estuaries: salt wedge, partially mixed, vertically homogeneous, and fjord. Each panel illustrates river and seawater mixing patterns, with arrows indicating the direction of saltwater and freshwater flow. — estuary Four main types of estuaries: (A) salt wedge estuary, (B) partially mixed estuary, (C) vertically homogeneous estuary, and (D) fjord (black arrows indicate salt water and white arrows fresh).

Fjord estuaries are deep, narrow gorges formed by the erosion of glaciers that were subsequently inundated by rising sea levels. These features are especially common in Norway and along the coastal margins of British Columbia, Canada.12