landforms of deposition

Explain how a spit is formed

1. Sediment is transported along the coastline by LSD

2. Coastline chnages direction and waves lose energy caused the sediment to be deposited

3. Sediment builds up out into the sea = spit

4. Spit chnages direction due to prevailing wind = recurved spit

5. Multiple curves = compound spit

6. Form on drift aligned beach

7. Example double spit at pool harbour Dorset

Tombolo formation

1. Extended spit that join the mainland to the island

2. Formed due to the wave refraction from the main island causing wave velocity to decrease leading to deposition

3. May be covered at high

Explain a bar

1. Spit that grows across a bay and joins two headlands

2. Forming lagoon behind

3. Example start bay barrier beach in slapton key

1. A spit that grows across a bay and joins two headlands together

2. A lagoon may form behind

3. Start bay Barrier beach at slapton key

Explain how a offshore bar forms

1. Offshore regions where sand is deposited due to waves losing energy caused

2. Formed when waves break early which deposits sediment or backswash from destructive (removes sediment from beach)

3. Only visible at low tide

4. Visible ones are barrier island