It appears that a couple of craters were just barely flooded by lava, with a jumble of blocky material in the middle. Curious why this happens and where the blocky stuff comes from—if the craters were filled by something, why did lava flow in at a lower level and why does the jumble stick up above the crater rim?

ID: ESP_054641_1805
date: 24 March 2018
altitude: 271 km

https://uahirise.org/hipod/ESP_054641_1805
NASA/JPL-Caltech/UArizona
#Mars #science #NASA