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A view of linear dunes in the Great Sandy Desert in Australia from the International Space Station. The sand is mostly orange, with some red spots and some dark brown spots. There is a thick white line that cuts through the middle of the dunes; this is a lake with sediment and salts from evaporated flood waters.

Linear Sand Dunes in the Great Sandy Desert

In northwest Australia, the Great Sandy Desert holds great geological interest as a zone of active sand dune movement. While a variety of dune forms appear across the region, this astronaut photograph features numerous linear dunes (about 25 meters high) separated in a roughly regular fashion (0.5 to 1.5 kilometers apart).

Image Credit: NASA

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TakenMarch 25, 2013
Image CreditNASA
Size1440x960px