http://www.nasa.gov/mission_pages/me...r20091002.html

Opportunity Finds Another Meteorite
10.02.09

[Image]
A meteorite recently discovered by Opportunity

NASA's Mars Exploration Rover Opportunity has found a rock that
apparently is another meteorite, less than three weeks after driving
away from a larger meteorite that the rover examined for six weeks.

Opportunity used its navigation camera during the mission's 2,022nd
Martian day, or sol, (Oct. 1, 2009) to take this image of the apparent
meteorite dubbed "Shelter Island." The pitted rock is about 47
centimeters (18.5 inches) long. Opportunity had driven 28.5 meters (94
feet) that sol to approach the rock after it had been detected in
images
taken after a drive two sols earlier.

Opportunity has driven about 700 meters (about 2,300 feet) since it
finished studying the meteorite called "Block Island" on Sept. 11,
2009.

Image Credit: NASA/JPL-Caltech