The steep walls of Valles Marineris sometimes fail, creating giant landslides. This provides a clean exposure of the underlying bedrock.
<p>This image of the north wall of Ganges Chasma <a rel="nofollow" class="external text" href="http://static.uahirise.org/images/2016/details/cut/ESP_047502_1730.jpg">reveals bedrock with diverse colors and textures</a>, representing different geologic units.
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The University of Arizona, Tucson, operates HiRISE, which was built by Ball Aerospace &amp; Technologies Corp., Boulder, Colo. NASA's Jet Propulsion Laboratory, a division of Caltech in Pasadena, California, manages the Mars Reconnaissance Orbiter Project for NASA's Science Mission Directorate, Washington.
NASA/JPL-Caltech/Univ. of Arizona
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