|A stereo version of the Sagan Memorial Station as viewed by the Sojourner Rover. Images were combined from the two forward black and white cameras on the rover and processed as red and blue separations to produce this three dimensional scene.|
The top image is a view to the northeast of the lander and is annotated to show the variety of rocks in this landing site and what they tell us. The red arrows point to rounded boulders and rocks, thought to have been shaped by the forces of water in flood (rough edges knocked off by the tumbling action of the water). The blue arrows indicated rocks with sharp edges and points, most probably ejected from nearby impact craters and/or ancient volcanic activity. The white areas (of which Scooby Doo is one) are believed to be deposits left behind by evaporating water, or aggregates of materials fused together by the action of water.
The lower image is the clearest image yet of Yogi (with the Sojourner Rover taking its Alpha Proton X-ray Spectrometer measurement). It clearly shows the "two-toned" surface of this large rock. The nature of this color difference is not known, however. It might consist of wind-blown dust accumulated on the surface (the rock is leaning into the prevailing wind) or might be evidence of a break from a larger boulder as it was deposited in the ancient flood that scoured this area.