(JPL ) Martian sandbox: An area dubbed "Rocknest" features fine-grained sands that will be scooped up by the Curiosity rover to test its sampling system and to clean out any lingering traces of Earth's environment.
Curiosity Rover Pauses to Get the Scoop on Mars
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OCTOBER 06, 2012
William Harwood, CBS News

After creeping about 500 yards across the rocky floor of Gale Crater on the way to an intriguing intersection of different terrain types, the Mars Curiosity rover is pausing for a few weeks near fine-grained sand dunes to scoop up soil and run it through the vehicle's sample acquisition system to clean out any lingering traces of Earth's environment.
Read more: CBS News