Dune

:This article is about the sand formations, for other meanings see Dune (disambiguation).

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In physical geography, a dune is a hill of sand built by eolian (wind-related) processes. Bare dunes are subject to shifting location and size based on their interaction with the wind. The "valley" or trough between dunes is called a slack.

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Some coastal areas have one or more sets of dunes running parallel to the shoreline directly inland from the beach. In most such cases the dunes are important in protecting the land against potential ravages by storm waves from the sea. Although the most widely distributed dunes are those associated with coastal regions, the largest complexes of dunes are found inland in dry regions and associated with ancient lake or sea beds.

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Dunes also form under the action of water flow (Alluvial processes), on sand or gravel beds of rivers, estuaries and the sea-bed.

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Geography: Geography is the scientific study of the locational and spatial variation of both physical, biological and human phenomena on Earth. The word derives from the Greek words γη or γεια ("Earth") and γραφειν ("to describe" and "to wr...

Hill: For the landform that extends less than 600 metres above the surrounding terrain and that is smaller than a mountain, see the mountain article. Many hills are taller than most skyscrapers but are generally small....

Eolian: Eolian (or aeolian) processes pertain to the activity of the winds. Winds may erode, transport, and deposit materials, and are effective agents in regions with sparse vegetation and a large supply of unconsolidated sediments. Although water is much more powerful than wind, eolian processes are impor...

Dune related Images and Photos (experimental)

Dune	Song d'une nuit d'ete	Tete d'une Femme Lisant	Dune Path
Dune DVD (Widescreen)	Dune DVD (Widescreen)	Dune Silhouette	Dune Blu-ray DVD
Micheline Presle: L'Amour D'Une Femme 1954	Parce Qu'Il s'Agit d'Une Ombre	Dune at Siesta Key	Vintage Dune Buggy Race