Marathon Valley, Sol 4078-4481 (July 15, 2015 - September 1, 2016) |
Marathon Valley, Sol 4078-4481 (July 15, 2015 - September 1, 2016) |
Jul 15 2015, 01:54 PM
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#1
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Senior Member Group: Members Posts: 4260 Joined: 17-January 05 Member No.: 152 |
It looks like we had a pretty good drive on 4078 roughly to the east (or NE) and now have a better view down into Marathon Valley:
http://qt.exploratorium.edu/mars/opportuni...0M1.JPG?sol4078 (Yes, we are still paying attention, Oppy!) |
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Aug 27 2015, 07:42 PM
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#2
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Administrator Group: Admin Posts: 5172 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
"Float" is a term for rocks that have broken from their source rock, so they're no longer in place; they lack context (except that they probably originated upslope). Geologists prefer to analyze bedrock rather than float when they can, but the rovers are often forced to look at float rocks rather than outcrop higher up because of terrain trafficability issues. What they do try to do is find float that hasn't traveled far, where you can see the scar that it left behind on the outcrop so you be reasonably sure you know its initial position and orientation.
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