NASA Mars Reconnaissance Orbiter HiRISE July 11, 2012

– Light-Toned and Possible Hydrated Materials in Gullied Crater http://hirise.lpl.arizona.edu/ESP_025472_1405

This observation shows a gullied crater in the Southern mid-latitudes with light-toned deposits near the center of its floor.

– Well-Preserved Impact Crater with Ridges http://hirise.lpl.arizona.edu/ESP_025557_1705

Although the rim of this well-preserved crater and its smooth walls are very impressive, so is the spectacular collection of ridges draping the floor.

– Northern Polar Dune Field http://hirise.lpl.arizona.edu/ESP_027378_2540

These dunes, known as barchan dunes, usually form where there is a moderate supply of sand and a prevailing wind direction.

– Polar Cliffs and Falling Blocks http://hirise.lpl.arizona.edu/ESP_027451_2635

There is an ice sheet at the North Pole of Mars that is a few miles thick at its center, and at some places it ends in steep cliffs.

All of the HiRISE images are archived here: http://hirise.lpl.arizona.edu/

Information about the Mars Reconnaissance Orbiter is online at http://www.nasa.gov/mro. The mission is managed by NASA’s Jet Propulsion Laboratory, a division of the California Institute of Technology, for the NASA Science Mission Directorate, Washington, D.C. Lockheed Martin Space Systems, of Denver, is the prime contractor and built the spacecraft. HiRISE is operated by the University of Arizona. Ball Aerospace and Technologies Corp., of Boulder, Colo., built the HiRISE instrument.