Erosion
Hydraulic Acrion
They force water into cracks in the rock under pressure.This helps to break the rock up.It is called hydraulic Action.
Thursday, 26 May 2011
Waves & Coasts
Abrasion
The waves fling sand, pebbles and large stones against the rock.These wear it away like sandpaper. This is called Abrasion.
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Sunday, 15 May 2011
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