In this image from NASA's Mars Reconnaissance Orbiter, a group of <a rel="nofollow" class="external text" href="http://static.uahirise.org/images/2017/details/cut/PSP_008735_1700.jpg">steeply inclined light-toned layers</a> is bounded above and below by unconformities (sudden or irregular changes from one deposit to another) that indicate a "break" where erosion of pre-existing layers was taking place at a higher rate than deposition of new materials.
<p>The layered deposits in Melas Basin may have been deposited during the growth of a delta complex. This depositional sequence likely represents a period where materials were being deposited on the floor of a lake or running river.
</p><p>This is a stereo pair with <a rel="nofollow" class="external text" href="http://www.uahirise.org/PSP_007878_1700">PSP_007878_1700</a>.
</p><p>The map is projected here at a scale of 25 centimeters (9.8 inches) per pixel. [The original image scale is 28.9 centimeters (11.4 inches) per pixel (with 1 x 1 binning); objects on the order of 87 centimeters (34.2 inches) across are resolved.] North is up.
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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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