Mars digital-image mosaic merged with color of the MC-6 quadrangle, Casius region of Mars. This image is from NASA's Viking Orbiter 1.

Mars digital-image mosaic merged with color of the MC-6 quadrangle, Casius region of Mars. Except for the highly dissected southwestern part, which contains faults, mesas, and buttes of Nilosyrtis Mensae, the Casius region is dominated by light-colored and dark, relatively smooth plains. Latitude range 30 to 65 degrees, longitude range -120 to -60 degrees.

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