Impact craters expose the subsurface materials on steep slopes. However, these slopes often experience rockfalls and debris avalanches that keep the surface clean of dust, revealing a variety of hues, like in <a rel="nofollow" class="external text" href="http://static.uahirise.org/images/2017/details/cut/ESP_021520_1550.jpg">this enhanced-color image</a>, representing different rock types. The bright reddish material at the top of the crater rim is from a coating of the Martian dust.
<p>The long streamers of material are from downslope movements. Also revealed in this slope are a variety of bedrock textures, with a mix of layered and jumbled deposits. This sample is typical of the Martian highlands, with lava flows and water-lain materials depositing layers, then broken up and jumbled by many impact events.
</p><p>(Note: North is approximately down in the cutout and above image).
</p><p>This is a stereo pair with <a rel="nofollow" class="external text" href="http://www.uahirise.org/ESP_021454_1550">ESP_021454_1550</a>.
</p>
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
<b><a rel="nofollow" class="external text" href="https://photojournal.jpl.nasa.gov/catalog/PIA14454">Catalog page</a></b><span style="white-space:nowrap"> <b>·</b></span> Full-res (<a rel="nofollow" class="external text" href="https://photojournal.jpl.nasa.gov/jpeg/PIA14454.jpg">JPEG</a><span style="white-space:nowrap"> <b>·</b></span> <a rel="nofollow" class="external text" href="https://photojournal.jpl.nasa.gov/tiff/PIA14454.tif">TIFF</a>)