[meteorite-list] MRO HiRISE Images - October 26, 2011

[Ron Baalke]

MARS RECONNAISSANCE ORBITER HIRISE IMAGES
October 26, 2011

o Continuing Avalanches	
  http://hirise.lpl.arizona.edu/ESP_016228_2650

  What triggers these falls? Seasonal temperature changes in the ice 
  layers, gusts of wind passing over loosened rocks in steep slopes, or 
  something else entirely?

o Rafting Rocks	
  http://hirise.lpl.arizona.edu/ESP_023314_1440

  In this image, It looks as if a flat solid surface broke up, and then 
  the individual pieces were rafted apart.

o Diverse Layers and Mineralogy near Mawrth Vallis	
  http://hirise.lpl.arizona.edu/ESP_024055_2045

  Clays contain water, indicating that this region may have been wet in 
  the past.

o Gullies on the South Wall of Dao Vallis near the Confluence with Niger Vallis	
  http://hirise.lpl.arizona.edu/ESP_024315_1435
  
  This valley fill material was likely ice-rich and flowed down the wall or 
  valley similar to slow moving glacial material 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.