22 July 2004
This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows troughs and pits formed by collapse in the Gordii Fossae region, east of the volcano, Olympus Mons. Squiggly ridges with crests roughly aligned northwest-southeast (upper left to lower right), scattered throughout the image, are windblown dunes that have been covered by a mantling of dust. The image is located near 16.2°N, 125.3°W, and covers an area about 3 km (1.9 mi) wide. Sunlight illuminates the scene from the lower left.