"Joe Knapp" wrote in message
. com...
Opportunity took this MI photo of the soil outside Eagle Crater a few days
ago:

http://tinyurl.com/26clx

Don't many of those small pebbles (about 1m in size) look like they fit
together? If so, what process would cause that?

Here's a closeup of a good example:
http://www.copperas.com/astro/pieces.jpg

Gravel tends to look that way....

all the fines have been blown away.

I've seen that in the SW and Antarctica

bob