NASA/JPL/Malin Space Science Systems
Small ridges known as yardangs in the upper left quarter of this April 2003 Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image indicate that wind has stripped away a mantling layer of sediment to reveal the terrain beneath. Layers and boulders on the cliff face near the south-center of the image show that the substrate is quite competent; its location southwest of Olympus Mons near Gordii Dorsum suggests the bedrock here may include old lava flows. The picture is located near 4.8°N, 142.7°W. Sunlight illuminates the scene from the left/lower left.
Malin Space Science Systems and the California Institute of Technology built the MOC using spare hardware from the Mars Observer mission. MSSS operates the camera from its facilities in San Diego, California. The Jet Propulsion Laboratory's Mars Surveyor Operations Project operates the Mars Global Surveyor spacecraft with its industrial partner, Lockheed Martin Astronautics, from facilities in Pasadena, California and Denver, Colorado.