Keywords: mars nasa mro jpl university of arizona universityofarizona ua science geology blackandwhite monochrome texture abstract black and white Light-Toned Material and Dark Dunes and Gullies NASA/JPL/University of Arizona (5 km top to bottom, North is to the left, 295 km above the surface. www.uahirise.org/ESP_025177_2145) Light-Toned Material and Dark Dunes and Gullies NASA/JPL/University of Arizona (5 km top to bottom, North is to the left, 295 km above the surface. www.uahirise.org/ESP_025177_2145) |