This rock, dubbed "Gasconade," was investigated by NASA's Mars Exploration Rover Opportunity while the rover was perched on "Spirit Mound" at the western edge of Mars' Endeavour Crater. Four Oct. 2, 2016, frames from Opportunity's microscopic imager are joined in this mosaic view.

December 07, 2016

Credit

NASA/JPL-Caltech/Cornell/USGS/ASU

ENLARGE

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