CRISM: Aluminum and iron/magnesium clays in Mawrth Vallis

This image, which covers a site located northeast of Oyama Crater, shows aluminum-containing minerals called phyllosilicates in a cyan color and iron-magnesium-containing phyllosilicates in a red/magenta color. Phyllosilicates are clay and clay-like minerals formed by chemical reactions with liquid water. Their microscopic crystal form in very thin stacked layers and are also called sheet silicates. In the perspective… [More at link]