HiPOD: Flowing Rivers on Ancient Mars

This image of ridges in Aeolis Planum tells a story of ancient rivers and a Mars very different to that of today. River beds often get filled with gravel and the surrounding terrain is often built up of fine-grained mud from river overflows. These ridges show the location of the old river beds in Mars' distant past.

More: https://uahirise.org/hipod/ESP_080081_1735
NASA/JPL-Caltech/UArizona
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