Mars Reconnaissance Orbiter HiRISE Images – September 21, 2011

o Small Mounds in Chryse Planitia http://hirise.lpl.arizona.edu/ESP_023304_1995

The area in this observation is characterized by a group of cones, shield-like features, and round mounds.

o Avire Crater Seasonal Monitoring http://hirise.lpl.arizona.edu/ESP_023322_1390

The origin of gullies is controversial, but many, and probably those here, seem to require carbon dioxide or water frost.

o Jumbled Terrain in Ius Chasma http://hirise.lpl.arizona.edu/ESP_023398_1725

The bright units have a mineral called sulfate that on Earth typically forms in the presence of water as an evaporite.

o Opportunity at Endeavour Crater http://hirise.lpl.arizona.edu/ESP_024015_1775

Opportunity travelled nearly three years to reach this rim because it contains rocks even more ancient than the rocks of Meridiani Planum.

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.