NASA's Mars Global Surveyor shows dark-toned sand dunes on the floor of the large martian impact crater, Herschel, located in the Terra Cimmeria region of Mars.

4 August 2005
This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows dark-toned sand dunes on the floor of the large martian impact crater, Herschel, located in the Terra Cimmeria region of Mars. The winds responsible for these dunes blew from the northeast (upper right).

Location near: 15.7°S, 228.6°W
Image width: width: ~3 km (~1.9 mi)
Illumination from: upper left
Season: Southern Spring

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