NASA's Mars Global Surveyor shows dark north polar dunes overlying other materials in the north polar region of Mars.

21 March 2005
This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows dark north polar dunes overlying other materials in the north polar region.

Location near: 79.1°N, 228.8°W
Image width: ~3 km (~1.9 mi)
Illumination from: lower left
Season: Northern Summer

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