[meteorite-list] MRO HiRISE Images: February 11, 2015

[Ron Baalke]

MARS RECONNAISSANCE ORBITER HIRISE IMAGES
February 11, 2015

o Gullies and Bedrock in Nirgal Vallis	
  http://hirise.lpl.arizona.edu/ESP_020087_1515

  The gullies in this image are within the valley wall of an 
  ancient channel, a testament to flowing water in Mars' ancient past.

o A Large, Longitudinal Dune	
  http://hirise.lpl.arizona.edu/ESP_039568_1120

  Longitudinal dunes form when the wind switches between two common 
  directions.

o Boulders in Gully Alcoves	
  http://hirise.lpl.arizona.edu/ESP_039747_1090

  In the spring, when the ice warms up and transitions to gas, 
  dislodging material on the slope and forming a gully.

o Fan-Shaped Deposits in Bigbee Crater	
  http://hirise.lpl.arizona.edu/ESP_039893_1550

  The rim of Bigbee has been heavily modified from its original form, 
  presumably by water and wind. 

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.