MGS MOC Release No. MOC2-352, 6 May 2003
March 6, 2003, is the first day of spring in the martian southern hemisphere. As spring progresses in the south, dust devils will begin to form and sweep up some of the veneer of bright dust that accumulated during the recent autumn and winter seasons.
This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows sand dunes in Wirtz Crater. The dark streaks that criss-cross each dune were probably formed by passing dust devils that disrupted or removed some of the thin layer of dust that coats the dunes. The picture covers an area about 3 km (1.9 mi) wide near 48.3°S, 25.4°W. Sunlight illuminates the scene from the upper left.