Today's Image of Mars shows some amazingly colorful minerals and rocks found in Nili Fossae by HiRISE. The stunning array of colored rocks are the ejecta from an impact that broke up and expelled already diverse types of rock, mixing them up even more. Each different color seen below is representative of a different mineral.
There is a wealth of information about the past of the Martian climate that could be gathered by examining each of these minerals, so it may be that one day a mission is sent to Nili Fossae to do just that! Clicking on this image will take you to the original high resolution image from HiRISE. [See their caption for the image]