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The Concept Map you are trying to access has information related to:
sand dune thesaurus, reversing dunes, crescentic dunes, barchans, lunettes, sand dunes, complex dunes, oblique dunes, simple dunes, nebkhas, dome dunes, compound dunes, by env. condition , parabolic dunes, by dune type occurence , transverse dunes (crescentic ridges, barchanoid ridges), star dunes, by shape (aerial view) (by form and relation to formative winds) , oblique dunes, linear dunes, by shape (height)