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After weathering has broken some of the pieces of of a rock or a object erosions part comes in. Erosion carries the pieces to another place and the pieces start to form anotheâ¦r object leaving the other object with a cool shape such the grand canyon. 23 people found this useful.
1 If the cave is formed in a headland, it may eventually break through to the other side forming an arch. 2  The arch will gradually become bigger until it can no longer support the top of the arch. 3  When the arch collapses, it leaves the headland on one side and a stack (a tall column of rock) on the other. and erosion erosion: Erosion is the process whereby rock or soil is worn away by the action of the wind, waves or water. can create caves, arches, stacks and stumps along a headland. Old Harry Rocks, Swanage, Dorset.