This image from NASA's Mars Odyssey spacecraft shows Granicus Vallis, which is located northwest of the Elysium volcanic complex and may owe its origin to the interaction of volcanic heating and subsurface ground ice.

Granicus Vallis, located northwest of the Elysium volcanic complex, may owe its origin to the interaction of volcanic heating and subsurface ground ice. One of the most interesting features seen in this image are the quasi-dendritic depressions, best seen in the upper third of the image. These may be drainage systems formed by the melting of the local permafrost table. Granicus is the ancient name for a river in Turkey.

Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.

NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. The Thermal Emission Imaging System (THEMIS) was developed by Arizona State University, Tempe, in collaboration with Raytheon Santa Barbara Remote Sensing. The THEMIS investigation is led by Dr. Philip Christensen at Arizona State University. Lockheed Martin Astronautics, Denver, is the prime contractor for the Odyssey project, and developed and built the orbiter. Mission operations are conducted jointly from Lockheed Martin and from JPL, a division of the California Institute of Technology in Pasadena.

Image information: VIS instrument. Latitude 31.7, Longitude 125.4 East (234.6 West). 19 meter/pixel resolution.

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