Keywords: mars nasa university arizona science landscape geology blackandwhite monochrome texture abstract outdoor black and white Active Erosion in Pasteur Crater NASA/JPL/University of Arizona (5 km across, 286 km above the surface; www.uahirise.org/ESP_025372_2000) Active Erosion in Pasteur Crater NASA/JPL/University of Arizona (5 km across, 286 km above the surface; www.uahirise.org/ESP_025372_2000) |