NASA Mars Reconnaissance Orbiter HIRISE Images January 25, 2012

– Double Layer Ejecta in an Arabia Region Crater http://hirise.lpl.arizona.edu/ESP_024872_2175

After an impact, there sometimes multiple phases of material that fall to the ground, creating the appearance of layered-ejecta.

– Fluvial Fan on a Crater Floor http://hirise.lpl.arizona.edu/ESP_024887_2155

This observation shows a terrific fan-shaped deposit, beginning where the channel enters a crater.

– Dune Composition http://hirise.lpl.arizona.edu/ESP_025042_1375

Patterns of dune erosion and deposition provide insight into the sedimentary history of the surrounding terrain.

– Very Fresh Impact Crater Superposing a Wrinkle Ridge in Hesperia Planum http://hirise.lpl.arizona.edu/ESP_025237_1600

Wrinkle ridges are long, winding topographic highs and are often characterized by a broad arch with superposed narrow asymmetric ridges.

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.