At a rock called "Clovis," the rock abrasion tool on NASA’s Mars Exploration Rover Spirit cut a 9-millimeter (0.35-inch) hole during the rover's 216th martian day, or sol (Aug. 11, 2004).
The hole is the deepest drilled in a rock on Mars so far. This approximately true-color view was made from images taken by Spirit's panoramic camera on sol 226 (Aug. 21, 2004) at around 12:50 p.m. local true solar time - early afternoon in Gusev Crater on Mars.
To the right is a "brush flower" of circles produced by scrubbing the surface of the rock with the abrasion tool's wire brush.
Scientists used rover's Moessbauer spectrometer and alpha particle X-ray spectrometer to look for iron-bearing minerals and determine the elemental chemical composition of the rock.
This composite combines images taken with the camera's 600-, 530- and 480-nanometer filters. The diameter of the hole cut into the rock is 4.5 centimeters (1.8 inches).
Mars Rovers at JPL
Mars Rovers at Cornell
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Opportunity Team Decides Against Dunes
Pasadena CA (JPL) Aug 25, 2004
On sol 200 Opportunity was commanded to perform some remote sensing and some rock abrasion tool diagnostics in response to an activity that faulted out on sol 199. During these diagnostics on sol 200, the tool failed to respond as desired to a command to calibrate the grind motor.
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