This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows defrosting south high latitude dunes. In late winter and into the spring season, dark spots commonly form on dunes and other surfaces as seasonal carbon dioxide begins to sublime away.
Location near: 59.3Â°S, 343.3Â°W
Image width: ~2 km (~1.2 mi)
Illumination from: upper left
Season: Southern Spring