The Argyre impact basin contains some ancient eroded terrains, exposing rocks with diverse compositions, as shown by the color variability.

These are windows into ancient Mars, which was a wetter world than Mars today.

ID: ESP_020799_1385
date: 3 January 2011
altitude: 256 km

https://uahirise.org/hipod/ESP_020799_1385
NASA/JPL-Caltech/University of Arizona
#Mars #science #NASA