NASA's Mars Global Surveyor shows irregular-shaped mesas in the south polar region of Mars. The bright patches are the remains of seasonal frost.

31 October 2005
This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows irregular-shaped mesas in the south polar region of Mars. The bright patches are the remains of seasonal frost. During winter and most of spring, this entire scene would have been covered by carbon dioxide frost.

Location near: 79.2°S, 298.6°W
Image width: width: ~3 km (~1.9 mi)
Illumination from: upper left
Season: Southern Spring

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