How Do Sand Dunes Form?

Answer

If you have wind and sand you will have sand dunes. All it takes is a bit of breeze (10 mph) to put fine sand in motion. The wind will hit a small rock and that will disrupt the wind and cause the sand to fall out and pile up. As the pile gets bigger it disrupts more wind and just keeps growing.
Q&A Related to "How Do Sand Dunes Form"
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://answers.ask.com/Science/Nature/how_are_sand...
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...
The drag of the ground creates small eddies in the wind that brings the sand corns into a pattern where they pile up until the reaching an angle where the top corns roll down. This
http://answers.yahoo.com/question/index?qid=201110...
Explore this Topic
A dune is a hill or ridge of sand that is formed behind the part of the beach or a desert affected by tides or winds. They are formed when windblown sand is trapped ...
Sand dunes are sand hills that the wind has created by pushing the sand up. Sometimes, sand dunes can be formed by water. Large dune areas are called ergs. Look ...
Sand dunes are sand hills that the wind has created by pushing the sand up. Sometimes, sand dunes can be formed by water. Large dune areas are called ergs. Look ...
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