<p>Depression Adjacent to Crater in South Polar Region 
</p><p>This feature looks like a crater from a meteor impact rather than an ancient caldera of a volcano, but we are not quite sure. 
</p>
NASA/JPL/University of Arizona (250 km above the surface. <a rel="nofollow" class="external text" href="https://www.uahirise.org/ESP_050008_1000">www.uahirise.org/ESP_050008_1000</a>)
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/71688597@N05">UAHiRISE (NASA)</a>
2017-10-30 15:12
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/uahirise-mars/38086096312/">ESP_050008_1000</a>