Termed both 'catena' and 'fossae,' long linear depressions created by tectonic forces are a dominate surface feature of Alba Mons in this image captured by NASA's Mars Odyssey spacecraft.

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Termed both "catena" and "fossae," long linear depressions are a dominate surface feature of Alba Mons. Created by tectonic forces, these depressions are fault bounded downdropped blocks of materials called grabens on Earth. Today's VIS image shows two graben.

Orbit Number: 38753 Latitude: 36.4426 Longitude: 262.063 Instrument: VIS Captured: 2010-09-09 06:21

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

NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Science Mission Directorate, 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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