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Coral Pink Sand Dunes.
Courtesy of Gerald and Buff Corsi / California Academy of Sciences

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Death Valley.
Courtesy of Helen H. Johnston / California Academy of Sciences

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Dust storm in Afghanistan (2001).
Courtesy of Visible Earth A catalog of NASA images and animations of our home planet. (http://visibleearth.nasa.gov/)

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Egypt/Giza Pyramids.
Image courtesy of Mindy S. Phillips. All rights reserved.

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Egypt/Aswan Oasis.
Image courtesy of Mindy S. Phillips. All rights reserved.

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India/Jaisalmer.
Image courtesy of Mindy S. Phillips. All rights reserved.

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Sinai/Israel Camels.
Image courtesy of Mindy S. Phillips. All rights reserved.

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Landsat Satellite Image
This perspective view was generated by draping a Landsat satellite image over a preliminary topographic map from the Shuttle Radar Topography Mission. This image of Southern California, from the desert at Mojave to the ocean at Ventura, shows a variety of landscapes and environments.
Courtesy of Visible Earth A catalog of NASA images and animations of our home planet. (http://visibleearth.nasa.gov/)

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Scanning electron photograph.
Scanning electron photograph of the surface of a quartz grain from an intense chemical weathering environment. The surface texture shows numerous dissolution etch pits.
Courtesy of AccessScience. All rights reserved. (http://www.accessscience.com)

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Aerial view of the Sahara Desert.
Courtesy of Frances Elizabeth Hanan / California Academy of Sciences

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Sahara House.
Courtesy of Frances Elizabeth Hanan / California Academy of Sciences

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Sand Dunes.
Dunes are produced by the transport of sand by wind, White Sands National Monument, NM. The sand in these dunes is made up almost entirely of gypsum (CaSO4). Despite their appearance, the dunes are only a thin veneer of sand that is steadily moving across the countryside.
Courtesy of AccessScience. All rights reserved. (http://www.accessscience.com)

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