Dunes of Wirtz
This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows dark sand dunes, formed by winds blowing from the southwest (lower left), in Wirtz Crater. The crater is named for Carl Wilhelm Wirtz (1876-1939), a German astronomer.
Location near: 49.0Â°S, 25.5Â°W
Image width: ~3 km (~1.9 mi)
Illumination from: upper left
Season: Southern Autumn