Sand dune, Definition, Formation, & Facts

Sand dune, any accumulation of sand grains shaped into a mound or ridge by the wind under the influence of gravity. Sand dunes are comparable to other forms that appear when a fluid moves over a loose bed, such as subaqueous “dunes” on the beds of rivers and tidal estuaries and sand waves on the

GC6WT0Y Freshwater Coastal Sand Dune - Burlington Beach (Earthcache) in Ontario, Canada created by Bug Finders

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Sand dune, Definition, Formation, & Facts

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