The process involves the force of water against the coast. The waves enter cracks (faults) in the coastline and compress the air in the crack expands quickly causing a minor explosion. The process is repeated continuously.
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Attrition
Material carried by the waves bump into each other and so are smoothed and broken down into smaller particles
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Corrasion
This is the chemical action of sea water. The acids in the salt water slowly dissolve rocks on the coast. Limestone and chalk are particularly prone to this process.
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Abrasion
This is the process by which the coast is worn down by material carried by the waves. Waves throw these particles against the rock, sometimes at high velocity
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