Gerry Ellis / Aerial view of barchan dunes showing typical horns and downwind slip face, at approximately 32 degrees, Skeleton Coast National Park, Namibia
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Patricio Robles Gil / Aerial view of sand dunes north of Guerrero Negro, west coast of Baja California, Mexico
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Gerry Ellis / Aerial view of barchan cunes showing typical horns and downwind slip face, at approximately 32 degrees, Skeleton Coast National Park, Namibia
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Gerry Ellis / Barchan Dune, Skeleton Coast National Park, Namibia