Sick, Interesting Picture

I'm feeling really sick today. Little voice, sneezing, shivers. Ick.

Anyway, I was reading through some NASA Mars footage, and found some interesting stuff - and surprisingly little commentary on it, so far. This picture is either a fake, a photograph of something shiny that looks remarkably like water, or a Mars Puddle. Any ideas? A few people have commented on the very different texture of the block in the foreground, also. To my eyes, it could be eroded volcanic rock - BUT, why do the two rocks have erosion patterns in different directions? A lot of conspiracy nuts say that it looks like wood. It does, but that wouldn't make much sense!
Mood: sick
Music: None