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What is longshore drift
beach material/sediment transported along the coast
waves hit at an angle (swash) due to prevailing wind
dragged back by backwash
What is swash?
When waves break on to a beach at an angle, material is pushed up the beach at the same angle by the swash
what is backwash?
material is pushed back down the beach by the backwash at ninety degrees to the coast.
How are beaches formed?
made up of eroded material that has been transported from elsewhere using longshore drift
Constructive waves help to build up beaches.
what is the formation of a stump?
- Cracks in cliff face+waves with sand+hydraulic action
- =wave cut notch
erodes over time
Weathering and erosion can create caves, arches, stacks and stumps along a headland.
what is the process of cliff erosion
- Weather weakens the top of the cliff.
- The sea attacks the base of the cliff forming a wave-cut notch.
- The notch increases in size causing the cliff to collapse.
- The backwash carries the rubble towards the sea forming a wave-cut platform.
- The process repeats and the cliff continues to retreat.
what is a headland?
Hard/soft rock attacked by destructive waves
section of land left stuck out