Adirondack's Inner Self
This spectrum - the first taken of a rock on another planet - reveals the different iron-containing minerals that makeup the martian rock dubbed Adirondack. It shows that Adirondack is a type of volcanic rock known as basalt. Specifically, the rock is what is called olivine basalt because in addition to magnetite and pyroxene, two key ingredients of basalt, it contains a mineral called olivine. This data was acquired by Spirit's moessbauer spectrometer before the rover developed communication problems with Earth on the 18th martian day, or sol, of its mission.
Image Credit: NASA/JPL/University of Mainz
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