29 February 2004
Flowing lava can make leveed channels--that is, channels with raised-rimmed walls. This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows an example from the lower north flank of the giant volcano, Olympus Mons. The channels today are filled with a blanket of dust. The image is located near 23.0°N, 135.9°W. Sunlight illuminates the scene from the lower left; the picture covers an area 3 km (1.9 mi) wide.