[meteorite-list] Mars Rover Opportunity Update: March 27 - April 1, 2013

[Ron Baalke]

MARS RECONNAISSANCE ORBITER HIRISE IMAGES
April 10, 2013

o Megabreccia on the Floor of an Impact Crater	
  http://hirise.lpl.arizona.edu/ESP_023099_1545

  "Megabreccia" is a term we use to describe jumbled, fragmented 
  blocks of rock larger than 1 meter across.

o Ridges and Grooves That Wave and Buckle on a Valley Floor	
  http://hirise.lpl.arizona.edu/ESP_026414_2205

  Scientists have long suspected these features are associated 
  with some ancient climate that had prevailed in this latidunal 
  region.

o Bright Tracks from Bouncing and Rolling Boulders	
  http://hirise.lpl.arizona.edu/ESP_031103_1405

  Where did the boulders come from? Maybe they fell off of the 
  steep upper cliffs of the crater, although we don't see any 
  new bright features there that point to the source.

o Raindrops of Sand in Copernicus Crater	
  http://hirise.lpl.arizona.edu/ESP_031221_1315
 
  The dark features here look like raindrops, but are actually 
  sand dunes.

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.