This flow has other flows (lava? mud?) lapping up onto the top from all sides, but still stands up in relief. Did most of the flow volume drain away? The volume would have been huge, and it doesn’t look like the un-covered part is noticeably taller.

ID: ESP_043109_2250
date: 7 October 2015
altitude: 303 km

https://uahirise.org/hipod/ESP_043109_2250
NASA/JPL-Caltech/UArizona
#Mars #science #NASA