Back to Coastal and Oceanic Landform
|Ria of San Vicente de la Barquera in Cantabria, Spain|
- A ria 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.
- Rias have a dendritic, treelike outline.
- This pattern is inherited from the dendritic drainage pattern of the flooded river valley.
- The drowning of river valleys along a stretch of coast.
- Rias results in an irregular and indented coastline.
- There are islands.
- They are summits of partly submerged, pre-existing hill peaks.
- A ria coast is a coastline having several parallel.
- Rias separated by prominent ridges, extending a distance inland.
- The sea level change.
- It caused the submergence of a river valley may be either eustatic/ orisostatic.
- The result is often a very large estuary at the mouth of a relatively insignificant river.
- The Kingsbridge Estuary in Devon, England is an extreme example of a ria forming an estuary.
|Ria Formosa from Quinta do Lago|
- Portugal: Ria de Aveiro in Aveiro
- Wales: Milford Haven in Pembrokeshire is a ria
- Spain : Andalusia Ria of Carreras
- Asturias: Ria of Avilés
- Ria of Bilbao
- Ria of Tina Mayor
- Ria of Tina Menor
- Kenya: Kilindini Harbour
- Sanriku Coast: North Japan, east coast of Honshū Island
- Australia: The east coast of Australia features several rias around Sydney, including Georges River, Port Hacking and Sydney Harbour itself.
Georges River, in the southern suburbs of Sydney