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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 is a Sand Dune? A sand dune is a mount, hill or ridge of sand that lies behind the part of the beach affected by. tides. They are formed over many years when windblown sand is trapped by beach grass or other. stationary objects. Dune grasses anchor the dunes with their roots, holding them temporarily in.