A CaSSIS image shows what may be breccias at the base of a clay-bearing unit exposed in Nirgal Vallis. Breccia are rocks of angular fragments cemented together, and are pretty small at CaSSIS resolution, so we can take a closer look. There are also diverse compositions exposed here. (CaSSIS, Colour and Stereo Surface Imaging System, is an instrument on the ExoMars Trace Gas Orbiter.)

ID: ESP_075657_1505
date: 16 September 2022
altitude: 258 km

https://uahirise.org/hipod/ESP_075657_1505
NASA/JPL-Caltech/University of Arizona
#Mars #science #NASA