image: Ribbon colors indicate the thicknesses of the CO2 radar-detected deposit are overlain on a map showing south polar layered deposits geology. Unit AA3 correlates with the deposit and units AA4a and AA4b are the water-ice and CO2-ice members, respectively, of the South Pole residual cap (SPRC). The dashed lines indicate the continuation of the AA3 unit where it is mostly buried by the SPRC. For more information, please see figure S3 in the Supporting Online Material. This image relates to an article that appeared in the April 21, 2011, issue of Science Express, published by AAAS. The study, by Roger J. Phillips at Southwest Research Institute in Boulder, Colo., and colleagues, was titled, "Massive CO2 Ice Deposits Sequestered in the South Polar Layered Deposits of Mars." view more
Credit: Image courtesy of NASA/JPL-Caltech/University of Rome/Southwest Research Institute