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HRSC mosaic with HRSC nadir & color images Small valleys in the southern part of the ellipse Long/lat: 341.15E, 23.85N Rational: Sediments deposited in this partly filled valley may be of utmost interest in the concentration and preservation of possible organic matter. Morphology & mineralogy: The two valleys are partly filled by the dark capping unit and dark dunes, they follow the steepest slope of the present topography, and may be two separated remnants of a single ancient valley. The valleys seem to have cut the Alphyllosilicate bearing rocks. MSL tasks: At large scale, seek possible fluvial sediments exposed in the valleys. At small scale, study the grain structure, the mineralogy and chemistry of the rocks on valley floors. 1 km HiRISE mosaic with HiRISE color images 1 km HiRISE mosaic with HiRISE color images 1 km HiRISE mosaic with HRSC DEM Valleys go from the highest part to the lowest part of this area, they may have been one single valley, cut by erosion and/or deposits.