o Possible Phyllosilicate Near Margaritifer Chaos
  http://hirise.lpl.arizona.edu/ESP_028288_1720

  The existence of clay minerals is especially interesting on Mars
  since we want to know under what conditions these minerals formed.
  Could it have been the presence of water?

o Chutes and Flows      
  http://hirise.lpl.arizona.edu/ESP_028321_1785

  Some of the surface material appears to have breached the crater rim
  and flowed into the crater by way of chutes.

o A Streamlined Island in Athabasca Valles      
  http://hirise.lpl.arizona.edu/ESP_028519_1895

  Streamlined islands form by a rapid erosive flow (catastrophic flooding)
  around an obstacle such as a resistant rock outcrop or surface armored
  by impact ejecta.

o Only on Mars  
  http://hirise.lpl.arizona.edu/ESP_028910_0985

  The South Polar terrain of Mars has a landscape unlike anywhere on Earth.

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.