This is the right image of a stereo pair taken by the Sojourner rover in the area behind the "Rock Garden" at the Pathfinder landing site and gives a view of the Martian surface not seen from the lander. Of note here are several dune-like ridges in the foreground. These features are less than a meter high but several meters wide. They are thought to be created by surface winds blowing right to left (approximately northeast to southwest). These features are called dunes, because of their asymmetry, although the rover has not examined the sediment within them. Such sediment on Earth would be sand-size grains less than 1 millimeter in diameter.