This microscopic image mosaic was created on sol 85 after NASA's Mars Exploration Rover Spirit completed a second grind with its rock abrasion tool at the target "New York" on the rock named "Mazatzal." The three-hour, 23-minute grind occurred on sol 83.

This grind was performed at the same location but at a slightly different angle than the first grind, which occurred on sol 82. This second drilling now reveals a full and somewhat deeper circle of underlying rock that will allow for a more complete analysis of the interior of the rock.

After the First Grind
This mosaic of four images from the Mars Exploration Rover Spirit's microscopic imager shows a target called "New York" on the surface of "Mazatzal." The image was acquired on sol 82 of the rover's mission after the rover ground into the left half of the target. The right side of the target has been brushed but not drilled. Later, on sol 85, the rover ground the right side to complete the hole. Each image making up this mosaic is 3 centimeters (1.2 inches) across.