March 2, 2004 — This image, taken by Opportunity's panoramic camera, shows a rock at Meridiani Planum that provides evidence for a geologic feature known as ripple cross-stratification. At the base of the rock, layers can be seen dipping downward to the right. The bedding that contains these dipping layers is only .4 to .8 inches thick. In the upper right corner of the rock, layers also dip to the right, but exhibit a weak "concave-up" geometry. These two features — the thin, cross-stratified bedding combined with the possible concave geometry — suggest they were formed in the presence of moving water.