This image, taken by the panoramic
camera on the Mars Exploration Rover Opportunity, shows a close
up of the rock dubbed "El Capitan," located in the outcrop
at Meridiani Planum, Mars. This image shows fine, parallel lamination
in the upper area of the rock, which also contains scattered sphere-shaped
objects ranging from 1 to 2 millimeters (.04 to .08 inches) in
size. There are also more abundant, scattered vugs, or small cavities,
that are shaped like discs. These are about 1 centimeter (0.4
inches) long.
