This image from NASA's Mars Odyssey shows the ancient collapsed volcano, Alba Patera, surrounded by graben and collapse features termed catenae on Mars.

Context image for PIA10865 Alba Patera
Context image for PIA10865
Alba Patera

The ancient collapsed volcano, Alba Patera, is surrounded by graben and collapse features termed catenae. The 'string-of-prearl' appearance of the catenae is caused by collapse controlled by the fractures at the margins.

Image information: VIS instrument. Latitude 35.9N, Longitude 258.1E. 19 meter/pixel resolution.

Please see the THEMIS Data Citation Note for details on crediting THEMIS images.

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.

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