This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows material on the floor of a crater in Noachis Terra, west of Hellas Planitia. Windblown features, both the large, dark-toned sand dunes and smaller, light-toned ripples, obscure and perhaps, protect portions of the crater floor from further modification by erosional processes.
Location near: 45.4Â°S, 331.2Â°W
Image width: ~3 km (~1.9 mi)
Illumination from: upper left
Season: Southern Summer