<p>A Light-Toned Dome in Acidalia Planitia — A variety of origins have been suggested for these domes (volcanism, mud volcanoes, pingoes) and this is an excellent example.
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NASA/JPL/University of Arizona (299 km above the surface, less than 5 km across) <a rel="nofollow" class="external text" href="https://uahirise.org/PSP_002866_2225">uahirise.org/PSP_002866_2225</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/39877602281/">PSP_002866_2225</a>