<p>To Great Depths — This image from eastern Hellas Planitia shows some of the unusual features on the basin floor. 
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NASA/JPL/University of Arizona (<a rel="nofollow" class="external text" href="http://www.uahirise.org/ESP_049330_1425">www.uahirise.org/ESP_049330_1425</a>)
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/71688597@N05">UAHiRISE (NASA)</a>
2017-03-20 09:27
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/uahirise-mars/33819782112/">ESP_049330_1425</a>