An impact crater apparently filled and overspilled, creating this impressive channel now populated with sand dunes. But was it seasonal runoff or catastrophic discharge? Note the small, branching channel near the lower left.

ID: ESP_055264_1565
date: 11 May 2018
altitude: 256 km

https://uahirise.org/hipod/ESP_055264_1565
NASA/JPL-Caltech/UArizona
#Mars #science #NASA