<p>Aluminum Hydroxide on a Crater Floor in the Sirenum Region – The aluminum hydroxide (also known as the mineral gibbsite) is visible with the CRISM instrument (a spectrometer) and we have no existing high resolution images of this crater.
</p><p>NASA/JPL/University of Arizona (259 km above the surface, less than 5 km top to bottom and north is to the right). 
</p><p><a rel="nofollow" class="external text" href="https://www.uahirise.org/ESP_015951_1535">www.uahirise.org/ESP_015951_1535</a>
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<a rel="nofollow" class="external text" href="https://www.flickr.com/people/71688597@N05">UAHiRISE (NASA)</a>
2018-06-21 10:51
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/uahirise-mars/42222097204/">ESP_015951_1535</a>