Wind and Water Erosion

Questions (2)

Natural causes? Erosion, from wind and water.http://geography.about.com/od/physicalgeography/a/erosion.htm I cannot seem to find
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2. asked by bobpursley
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what can makes arches of rocks smooth and round?O strong winds O water freezing in the cracks O earthquakes O a river runnning
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2. asked anonymously
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