Caption Spotlight (3 April 2019): Clay-Rich Terrain in Eridania Basin
HiRISE reveals small-scale shapes that often correlate with mineral units and provides information about stratigraphy (i.e., what’s on top and relative ages). This image was acquired for co-analysis with a spectrometer instrument also on our spacecraft called CRISM (Compact Reconnaissance Imaging Spectrometer for Mars). It shows polygonal units that match clay-rich areas. Plus, this region is colorful!
This location, in Eridania Basin, was the site of an ancient lake, so these clay-rich sediments may have been habitable.
NASA/JPL/University of Arizona
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