Layered Trough Walls
This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows layers of bedrock exposed in the walls on both sides of an east-west-trending trough in the Memnonia/Mangala Valles region. Large boulders released from these rocky trough walls are found on the slopes and on the trough floor.
Location near: 18.4Â°S, 148.8Â°W
Image width: ~3 km (~1.9 mi)
Illumination from: upper left
Season: Southern Winter