Here's a beautiful shot of New Mexico's white sand dunes from Discovery News. The dunes are part of the Chihuanhuan Desert and the aptly named White Sands National Monument.
Some 250 million years ago, this area was home to a shallow sea. As the sea level began to drop, thick layers of gypsum settled on the sea floor, eventually forming a field. Then about 70 million years ago, plate tectonic activity increased. During this time, the Rocky Mountains shot up, taking the giant gypsum field with it.
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White sand dunes for miles
Here's a beautiful shot of New Mexico's white sand dunes from Discovery News. The dunes are part of the Chihuanhuan Desert and the aptly named White Sands National Monument.
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