Ria

Port Jackson, also referred to as Sydney Harbour, is a ria, or drowned river valley. The deeply indented shape of the ria reflects the dendritic pattern of drainage that existed before the rise in sea level that flooded the valley.

A ria (/ˈrə/;[1] Galician: ría, feminine noun derived from río, river) is a coastal inlet formed by the partial submergence of an unglaciated river valley. It is a drowned river valley that remains open to the sea.

  1. ^ "ria". Oxford English Dictionary (Online ed.). Oxford University Press. (Subscription or participating institution membership required.)

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