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More rock exposures. Spirit took these images while leaning at a 27-degree angle. NASA describes: "(A) The northern edge of Home Plate, (B) the coarse-grained lower unit, (C) the fine-grained upper unit."
This 2006 view of Spirit was taken by the Mars Reconnaissance Orbtier shows the robot at work in the region it explored.
Here's an artist's conception of what Spirit would look like on Mars.
And here's a resume compiled by NASA of Spirit's accomplishments.