Looks very much like you would see one driving in the desert on Earth.
This photograph 1P300935337ESFA400P2532L5M1 is version 1 of a photograph produced for M - MIPL (OPGS) at JPL on Wed, 15 Jul 2009 13:07 (Sol 1945). It was taken with the PANCAM, through the Left camera, using a 535nm (20nm bandpass) (green) filter on the Mars Rover Opportunity.
It is a Sub-frame EDR picture which is raw, is NOT liniarised, and is NOT thumbnail sized
The picture was taken at site number A4 on drive number 00, and the command sequence number P2532 to take the picture was instructed by PMA & Remote Sensing instr. (Pancam, Navcam, Hazcam, MI, Mini-TES) and belongs to the group 2000 through 2899 - Pancam sequences