Submergent coastline

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A submergent landform: the drowned river valley (ria) of Georges River, Sydney

Submergent coastlines are stretches along the coast that have been inundated by the sea due to a relative rise in sea levels. This occurs due to either isostacy or eustacy.

Submergent coastline are the opposite of emergent coastlines which have experienced a relative fall in sea-levels.

Features of a submergent coastline are:

Estuaries are often the drowned mouths of rivers.

Western Coastal Plains of Indian Subcontinent is an example of Submergent Coastline. An ancient city of Dwarka, mentioned in the great epic Mahabharat, is under water now. The coastline also forms estuaries of river Narmada and Tapti.