25.9 MB (1.8 MB compressed)
3656 x 2480 pixels
31.0 x 21.1 cm ⏐ 12.2 x 8.3 in (300dpi)
US GEOLOGICAL SURVEY / SCIENCE PHOTO LIBRARY US GEOLOGICAL SURVEY / SCIENCE PHOTO LIBRARY
Oblique view of the central region of the giant Valles Marineris canyon system on Mars, computer- processed from Viking spacecraft imagery & topographic maps of the planet. The Valles Marineris is over 3000 km long & up to 8 km deep, dwarfing the Grand Canyon of Arizona. The canyons were formed by a combination of geological faulting, landslides, & erosion by wind & water. The central area shown here contains layered deposits which may have been deposited by ancient lakes. The view is looking east, from 30 degrees above the horizon. Alfred McEwen & topographic mapping by Sherman Wu, both at USGS, Flagstaff, Arizona).
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