<p>Exotic Terrain in the Olympus Mons Aureole — This strange landscape features irregular arcs, rings and cones. Possibly rootless cones? 
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NASA/JPL/University of Arizona (293 km above the surface, and North is to the right) <a rel="nofollow" class="external text" href="https://www.uahirise.org/PSP_006166_2145">www.uahirise.org/PSP_006166_2145</a>
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/71688597@N05">UAHiRISE (NASA)</a>
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/uahirise-mars/39549703932/">PSP_006166_2145</a>