This false color image of the trench informally named "La Mancha" was taken by NASA's Phoenix Mars Lander's Surface Stereo Imager, was taken on the 131st Martian day, or sol, of the mission (Oct. 7, 2008). The image shows color variations of the trench, which is about 2 inches (5 centimeters) deep, and reveals the ice layer beneath the soil surface. Credit: NASA/JPL-Caltech/University of Arizona/Texas A&M University
