1. Deposition by the sea

2. Waves transport sand and shingle to the land by the swash and backwash
Deposition takes place when the power of the waves is lessened
Features of deposition include
Beach
Sand Dunes
Sand Spit
Tombolo
Lagoon

3. Features of deposition include

4. What is the difference?

6. Beach A beach consists of sand and shingle
formed by the swash and backwash
finer material is found at the lower part of the beach while the coarser material is deposited at the upper beach

7. In stormy weather the swash is strong enough to hurl large stones and rocks up past the normal high tide mark where they remain to form a Storm beach
Sandy beaches can be seen at Curracloe in Co. Wexford
Storm beaches can be seen at Garretstown Co. Cork

8. Sand Dunes Sand dunes are mounds of sand at the back of a beach
A sand dune is formed by the wind
The fine sand is carried inland and as the wind drops it deposits the sand to form a sand dune
The sand can be anchored by planting Marram Grass ( salt resistant plant that has deep roots to bind the sand particles)

9. Sand spit
A ridge of sand or shingle that is connected to the land at one end and extends into a bay or estuary
It is formed when large amounts of material are moved along the coast by longshore drift
As it loses energy it deposits material on the sea bed
The deposits build up to rise above the level of the water

10. Tombolo
A ridge of sand or shingle that joins an island to the mainland
Formed when a sand spit extends outwards from the mainland to link with the island ( by longshore drift)
Example Howth Co. Dublin

11. Lagoon
A lagoon is a body of water that is cut off from the sea by a bank of sand
Usually formed when a sand spit grows in length to meet the other side of a bay
Over time the lagoon begins to silt up if it is fed silt from inflowing rivers
Example Lough Gill Co. Kerry