Rock abrasion tool, also known as "rat" (circular device in center), located on the rover's instrument deployment device, or "arm." 2/8/2004 2/7/2004 2/7/2004 2/7/2004 A region at the end of the rock outcrop lining the small crater, called "Eagle Crater." The sphere-like grains or "blueberries" dotting the rocks in the outcrop can also be seen above the rocks, suggesting that these geologic features have origins beyond Eagle Crater. 2/7/2004 2/3/2004 1/28/2004 1/28/2004 1/28/2004 1/28/2004 1/28/2004 1/28/2004 1/28/2004 1/28/2004 1/28/2004 These layered rocks measure only 10 centimeters (4 inches) tall and are thought to be either volcanic ash deposits or sediments carried by water or wind. 1/27/2004 1/26/2004 Opportunity Photos Mars in Color, from “Spirit” 4/11/2004 4/11/2004 4/11/2004 4/11/2004 4/11/2004 4/11/2004 4/11/2004 4/11/2004 4/7/2004 4/7/2004 4/7/2004 4/6/2004 4/5/2004 4/5/2004 4/5/2004 4/5/2004 4/5/2004 no violet/indigo 4/5/2004 4/5/2004 4/4/2004 4/4/2004 4/3/2004 4/3/2004 4/3/2004 4/1/2004 3/31/2004 3/30/2004 3/29/2004 3/29/2004 3/27/2004 This image was taken by NASA's Mars Exploration Rover Spirit on sol 79 after completing a two-location brushing on the rock dubbed "Mazatzal." A coating of fine, dust-like material was successfully removed from targets named "Illinois" (right) and "New York" (left), revealing clean rock underneath. The center of the two brushed spots are approximately 10 centimeters (3.9 inches) apart and were aggressively analyzed by the instruments on the robotic arm on sol 80. On sol 81, the rover drilled into the New York target to expose the original rock underneath. 3/26/2004 3/25/2004 3/25/2004 3/25/2004 This hazard-avoidance camera image was taken by NASA's Mars Exploration Rover Spirit on sol 79 after completing a two-location brushing on the rock dubbed "Mazatzal." A coating of fine, dust-like material was successfully removed from targets named "Illinois" (right) and "New York" (left), revealing clean rock underneath. In this image, Spirit's panoramic camera mast assembly, or camera head, can be seen shadowing Mazatzal's surface. The center of the two brushed spots are approximately 10 centimeters (3.9 inches) apart and were aggressively analyzed by the instruments on the robotic arm on sol 80. On sol 81, the rover drilled into the New York target to expose the original rock underneath. Note: The raw images are under the pan camera with color filters. ??? 3/24/2004