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What is abrasion?
120
the wearing away of rock and soil found along the river bed and banks.
rocks carried along by the river wear down the river bed and banks.
the force of the river against the banks can cause air to be trapped in cracks and crevices. The pressure weakens the banks and gradually wears it away.
rocks being carried by the river smash together and break into smaller, smoother and rounder particles.
