Context of Carbonate Rocks in Heavily Eroded Martian Terrain
The color coding on this CRISM composite image of an area on Mars is based on infrared spectral information interpreted as evidence of various minerals present. Carbonate, which is indicative of a wet and non-acidic history, occurs in very small patches.
The colorful rocks exposed in the central peak visible in this image from NASA's Mars Reconnaissance Orbiter probably reflect variations in mineral content that were caused by water activity early in Mars' history.
This map indicates some of the geological information gained from orbital observations of Endeavour Crater, which has been the long-term destination for NASA's Mars Exploration Rover Opportunity since mid-2008.