This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows dark dunes superposed on the rippled floor of Proctor Crater in Noachis Terra. Winds blowing predominantly from east (right) to west (left) were responsible for the formation of these dunes.
Location near: 47.3Â°S, 329.4Â°W
Image width: ~3 km (~1.9 mi)
Illumination from: upper left
Season: Southern Summer