<p>The Dark Side of Dust Avalances – Changes on the Martian surface are detected by imaging the same area more than once. Here, we see several new dust avalanches on the slopes of ridges within the Olympus Mons Aureole. These changes occurred within six years. 
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Dust avalanches create slope streaks that expose darker materials usually hidden below a lighter-toned layer. Cascading fine-grained material easily diverts around boulders or alters direction when encountering a change in slope. 
</p><p>NASA/JPL/University of Arizona (283 km above the surface, less than 5 km across)
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Source: <a rel="nofollow" class="external text" href="https://www.uahirise.org/ESP_055285_2030">www.uahirise.org/ESP_055285_2030</a>
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/71688597@N05">UAHiRISE (NASA)</a>
2018-07-11 16:56
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/uahirise-mars/28727011587/">ESP_055285_2030</a>