CRISM: Iron-magnesium phyllosilicates in Gale Crater

This image shows iron/magnesium-bearing hydrated minerals called phyllosilicates in pink. Phyllosilicates are clay and clay-like minerals formed by chemical reactions with liquid water. They are very thin (microscopic) stacked layer crystal forms, also called sheet silicates. The CRISM team took this image to search for interesting minerals in Gale Crater in preparation for the Mars Science Laboratory (Curiosity) rover mission…. [More at link]