NASA's Mars Global Surveyor shows the outer edge of the south polar residual cap of Mars.

14 June 2006
This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows the outer edge of the south polar residual cap of Mars. During summer, the scarps that delineate the sides of the mesas, retreat (on average) by about 3 meters (~10 feet) owing to the sublimation of solid carbon dioxide.

Location near: 85.6°S, 349.8°W
Image width: ~3 km (~1.9 mi)
Illumination from: upper left
Season: Southern Summer

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