How Are Sand Dunes Formed?

Answer

Sand dunes are usually formed in two ways. They are formed when the wind blows the sand into a pile or a dune. The other way is when the water pushes the sand into a ridge or over a period of a time a dune.
Q&A Related to "How Are Sand Dunes Formed"
Sand dunes are formed by sand that is pushed ashore by waves or blown into piles by wind. Often, a dune is formed when sand accumulates around objects like sea grasses and builds
http://www.ask.com/web-answers/Science/Nature/how_...
A sand dune is a large sand hill formed by different wind patterns blowing over an area for an extended period of time. Over time, the wind shifts and moves the sand over itself,
http://wiki.answers.com/Q/How_is_sand_dune_formed
Volcanic eruption> ash-flow & sediment>earth uplift>sediment filled the rift. Substratum rock under ash
http://www.chacha.com/question/how-to-sand-dunes-f...
1. Sketch the basic shape of the dune onto your paper lightly with a charcoal pencil. Capture the overall shape of the dune in the sketch. Add minor details like small tufts of grass
http://www.ehow.com/how_7740190_paint-sand-dune.ht...
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