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Confidence votes 95.7K. A sand tornado is not truly a tornado. It is a phenomenon called a dust devil. Dust devils are whirlwinds that form when a layer of hot air forms just above the ground and rises in a relatively small, rotating column, picking up up dust or sand as it does so. Dust devils are rarely strong enough to cause damage, and are much weaker than tornadoes.
What are the types of erosion? Wind erosion is a significant force despite its limitations, altering and posing dangers to the environment. In areas such as sand dunes, wind erosion is the main force shaping the landscape, and indeed, in some deserts the landscape changes constantly. Sand grains are large enough that they are eroded in the manner of saltation, being picked up by the wind but usually redeposited relatively close by.