Falling Material Kicks Up Cloud of Dust on Dunes
NASA/JPL/University of Arizona

Falling Material Kicks Up Cloud of Dust on Dunes
PSP_007962_2635  Science Theme: Polar Geology



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There is a vast region of sand dunes at high northern latitudes on Mars. In the winter, a layer of carbon dioxide ice covers the dunes, and in the spring as the sun warms the ice it evaporates. This is a very active process, and sand dislodged from the crests of the dunes cascades down, forming dark streaks.

In the subimage falling material has kicked up a small cloud of dust. The color of the ice surrounding adjacent streaks of material suggests that dust has settled on the ice at the bottom after similar events.

Also discernible in this subimage are polygonal cracks in the ice on the dunes (the cracks disappear when the ice is gone).

Written by: Candy Hansen   (6 January 2010)



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Acquisition date:07 April 2008 Local Mars time: 1:29 PM
Latitude (centered):83.506° Longitude (East):118.588°
Range to target site:319.6 km (199.8 miles)Original image scale range:32.0 cm/pixel (with 1 x 1 binning) so objects ~96 cm across are resolved
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