Submergent coastline
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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:
Some geographers consider that estuaries are drowned mouths of rivers.