posted on Aug, 9 2012 @ 07:54 AM
I am going a little bit of topic here regarding the rover, but I just think this picture is stunning, and still Mars, so why not.
Taken with the HiRISE camera.
The relatively bright, small ridges are ripples. From their study on Earth, and close-up examination by the MER rovers
(roving elsewhere on Mars), scientists surmise that the ripples are composed of fine sand (less than 200 microns in diameter) or fine sand coated with
coarser sand and granules.
The larger, darker bedforms are dunes composed of sand, most likely of fine size. Ripples tend to move slower than dunes. Because of this, over time,
ripples get covered with dust, possibly explaining the bright tone visible here. The dunes are dark probably because they are composed of basaltic
sand (derived from dark, volcanic rock) that is blown by the wind enough that dust does not sufficiently accumulate to change their color.
Here you can download the picture in 2880. Since I was not able to put that resolution in the post.
Clouds at the bottom left?
edit on 9-8-2012 by LiberalSceptic because: (no reason given)