Attrition: a wearing down or weakening of resistance, especially as a result of continuous pressure or harassment
Abrasion: a scraped spot or area; the result of rubbing or abrading
The main geographical process relevant to Coastal Management would be Hydraulic action is a form of erosion caused by the force of moving water currents rushing into a crack in the rock face. It is strong enough to loosen sediment along the river bed and banks. The water compresses the air in the crack, pushing it right to the back. As the wave retreats, the highly pressurized air is suddenly released with explosive force, capable of chipping away the rock face over time. This causes a large amount of stress and can destroy coastal areas.
