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While craters are most often the site of gully formation on Mars, other topography supports gully formation. Mega-gullies are found on the southwestern parts of Vallis Marineris, and here, on hills east of Argyre Planitia.

Orbit Number: 42133 Latitude: -47.1054 Longitude: 330.081 Instrument: VIS Captured: 2011-06-14 12:10

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.