Landforms of Coastal Deposition

Question 1

Spits

Answer 1

Spits form on drift-aligned beaches. Sudden changes in coastline (e.g river mouth) can lead to the accretion of sediment, continuation of this can create spit

Question 2

Tombolo

Answer 2

A beach formed between a small island and the mainland. (e.g Chesil Beach)

Question 3

Offshore Bars

Answer 3

Submerged or partly exposed ridges of sand or coarse sediment created by waves offshore from the coast. Destructive waves erode the beach with their strong backwash and deposit it offshore.

Question 4

Barrier Beaches

Answer 4

Where a beach or spit extends across a bay to join two headlands (this is also a bar). More prominently, barrier beaches are usually sandy islands that normally lie parallel to the mainland shore. Often when the sediment deposited in offshore stores rises above the water.

Question 4

Sand Dunes

Answer 4

Sand that has been blown to the back of the beach by onshore winds. Form from:
- Large quantities of sand (brought by constructive waves)
- Large tidal range (large exposure of sand to dry)
- Dominant onshore winds (blow the dried sand)