A low mound, ridge, bank or hill of loose, windblown, granular material (generally sand), either bare or covered with vegetation, capable of movement from place to place but always retaining its characteristic shape
A dune is a hill or a ridge made of sand Dunes are shaped by the wind, and change all the time
Mounds or hills of sand created by dune grasses, which trap sand grains being moved across the beach by wind
accumulation of wind-blown sand in ridges or mounds that lie landward of the beach and usually parallel to the shoreline
A low hill of drifting sand usually formed on the coats, but often carried far inland by the prevailing winds
A low mound of fine-grained material that accumulates as a result of sediment transport in a current system Dunes have characteristic geometric forms that are maintained as they migrate Sand dunes are commonly classified according to shape See also: barchan dune, longitudinal dune, parabolic dune, seif dune, star dune, and transverse dune
A dune is a hill of sand near the sea or in a desert. a hill made of sand near the sea or in the desert = sand dune
(1) Stream bed deposit found streams whose channel is composed mainly of sand and silt Dunes are about 10 or more centimeters in height and are spaced a meter or more apart and are common in streams with high velocities