dune
Sign in to save400px|thumbnail|The Maspalomas Dunes of [[Gran Canaria, Canary Islands, Spain]]
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41 sectionsContents
- Formation
- Aeolian dunes
- Aeolian dune shapes
- Barchan or crescentic
- Transverse dunes
- Seif or longitudinal dunes
- Star
- Dome
- Lunettes
- Parabolic
- Reversing dunes
- Draas
- Dune complexity
- Dune movement
- Coastal dunes
- Ecological succession on coastal dunes
- Coastal dune floral adaptations
- Gypsum dunes
- Nabkha dunes
- Subaqueous dunes
- Lithified dunes
- Desertification
- Conservation
- Examples
- Africa
- Asia
- Europe
- North America
- Canada
- United States
- Mexico
- South America
- Oceania
- World's highest dunes
- Sand dune systems
- Extraterrestrial dunes
- See also
- Notes
- References
- Further reading
- External links
400px|thumbnail|The Maspalomas Dunes of [[Gran Canaria, Canary Islands, Spain]]
A dune is a landform composed of wind- or water-driven sand. It typically takes the form of a mound, ridge, or hill. An area with dunes is called a dune system or a dune complex. A large dune complex is called a dune field, while broad, flat regions covered with wind-swept sand or dunes, with little or no vegetation, are called ergs or sand seas. Dunes occur in different shapes and sizes, but most kinds of dunes are longer on the stoss (upflow) side, where the sand is pushed up the dune, and have a shorter slip face in the lee side. The valley or trough between dunes is called a dune slack.