Linked from
The 10 pages that link to Abrasion (geology), each with the reason it gives.
Sediment transportRelated: Transporting grains can erode bedrock and other grains as they travel.
Aeolian processesRelated: Windblown sand sculpts exposed rock through repeated impacts.
River incisionRelated: Sediment impacts grind and chip the bed as the river carries its load.
Fluvial processesRelated: River-borne sediment scours channel surfaces as it travels.
Sea caveRelated: Wave-borne sand and stones grind cave walls and enlarge openings.
Wave-cut platformRelated: Wave-thrown sediment grinds the cliff base and platform surface.
Fluvial erosionRelated: Sediment dragged along a channel scrapes and grinds its bed and banks.
Bedrock riverRelated: Bedload acts as a tool that scours exposed rock in the channel.
Cliffed coastRelated: Wave-borne sand and stones grind against the cliff base.