<p>A Ridged Surface in South Hellas Planitia — An odd surface of ridges and troughs. Doesn’t look like dunes or scallops. It also seems we caught a dust devil in action! 
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(NASA/JPL/University of Arizona. Acquired: Feb 2017, approximately 259 kilometers above the surface. <a rel="nofollow" class="external text" href="https://www.uahirise.org/ESP_049568_1290">www.uahirise.org/ESP_049568_1290</a>)
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/71688597@N05">UAHiRISE (NASA)</a>
2017-08-14 11:43
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/uahirise-mars/36474601431/">ESP_049568_1290</a>