Approaching Marquette Island

Opportunity approaches a rock named Marquette Island, which is believed to be a stony meteorite, during the 2,056th Martian day, or sol, of the rover's mission on Mars, November 5, 2009.

NASA says that as Opportunity crossed a relatively barren plain on its long trek from Victoria Crater toward Endeavour Crater, the dark-toned rock stood out so prominently in more distant views on earlier sols that the rover team referred to it as Sore Thumb.