Comanche Outcrop, Gusev Crater, Mars (IMAGE) Arizona State University Caption The Comanche outcrop, seen in a mosaic of Panoramic Camera images from the Mars rover Spirit, holds key mineralogical evidence for an ancient lake in Gusev Crater. Credit NASA/JPL-Caltech/Cornell University/Arizona State University Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.