Low mounds, ridges, banks, or hills of loose, wind-blown granular material, either bare or covered with vegetation, capable of movement from place to place but always retaining their characteristic shape. [Adapted from Glossary of Geology, 4th ed.]
This category is also used for interdune troughs and sandy areas.
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Digital data from the Great Sand Dunes airborne gravity gradient survey, south-central Colorado

Flight-line data and gravity grids with documentation.