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Erosion is the top dog when it comes to weathering and tearing down the surface of the Earth. It usually accomplishes this by the forces of wind and running water, although it can be accomplished by water freezing and chemical action of lichens on rocks as well. The force of running water probably is the most destructive force, having a direct impact with higher force of current. Wind is a destructive erosive force as well, lifting tilled soils out of fields and depositing them many miles away. Sand dunes are formed in deserts with winds lifting the sand particles up into dunes, then cascading them over. Rivers with swift currents have enough carrying power to carry large size particles with them, all the way down to silt size particles, which settle into deposits at the mouth of the rivers. Often times, these sediment deposits have to be dredged out to allow for large ocean-going vessels, which settle deeper into the water, requiring a deeper channel to allow them passage.
Hurricane, tornadoe, sandstorm, dirtstorm, flood, etc.
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