Elemental Trio Found in 'Clovis'
This graph shows that the interior of the rock dubbed "Clovis" contains higher concentrations of sulfur, bromine and chlorine than basaltic, or volcanic, rocks studied so far at Gusev Crater. The data were taken by the Mars Exploration Rover Spirit's alpha particle X-ray spectrometer after the rover dug into Clovis with its rock abrasion tool. The findings might indicate that this rock was chemically altered, and that fluids once flowed through the rock depositing these elements.
Image Credit: NASA/JPL/Cornell/Max Planck Institute
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