Opportunity is on it's long path to the big crater about 12 miles away, but was stopped again by an interesting rock seen in it's path. Looks like another meteorite has been found just sitting on the ground like a discarded bottle. The arm will extend and take a sniff of the rock using the alpha particle X-ray spectrometer to get composition measurements to confirm it's a meteorite.
This is probably fairly common on Mars since the big chunks would get through the thinner atmosphere and hit the ground more than it would here on Earth. Not even a discarded toolbag would make it safely down!
(click photo on right for red/green 3d)