<p>Athabasca is part of a network of outflow channels that are understood to emanate from large fissures in the Martian surface. It might also be youngest outflow channel on the planet.The flows are most likely lava. 
</p><p>NASA/JPL/University of Arizona
</p>
<a rel="nofollow" class="external text" href="https://www.uahirise.org/ESP_050527_1830">www.uahirise.org/ESP_050527_1830</a>
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/71688597@N05">UAHiRISE (NASA)</a>
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/uahirise-mars/40404882763/">Landforms to the South of Athabasca Valles</a>