<p>Possible Clays and Sulfates in a Crater in Meridiani Planum — This unnamed crater is at least over 20-kilometers in diameter.
</p><p>NASA/JPL/University of Arizona (274 km above the surface, less than 1 km across)
</p><p>Source: <a rel="nofollow" class="external text" href="https://www.uahirise.org/ESP_017580_1840">www.uahirise.org/ESP_017580_1840</a>
</p>
​
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/71688597@N05">UAHiRISE (NASA)</a>
2018-09-17 14:15
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/uahirise-mars/44747183801/">ESP_017580_1840</a>