Martian Landscapes

Intersecting swirling trails left by the
earlier passage of dust devils across sand dunes, as they lifted
lighter reddish-pink dust and exposed the darker material below. Also
visible are darker slope streaks along dune edges, formed by a process
which is still under investigation.

Part of the Abalos Undae dune field. The sands
appear blueish because of their basaltic composition, while the lighter
areas are probably covered in dust.

Victoria Crater at Meridiani Planum. The crater is
approximately 800 meters (about half a mile) in diameter. Layered
sedimentary rocks are exposed along the inner wall of the crater, and
boulders that have fallen from the crater wall are visible on the
crater floor.

Close-up of tracks made by NASA's Mars rover Opportunity in the soil near Victoria Crater.

Scalloped sand dunes in the southern hemisphere of mars, displaying seasonal frost on the south-facing slopes, which highlights some of the regular patterns, as the frost forms only on parts of the ripples.