The dark features here look like raindrops, but are actually sand dunes. This spot was targeted by CRISM because the dunes are rich in the mineral olivine.
Olivine-rich dunes are very rare on Earth, as olivine rapidly weathers to clays in a wet environment. There is also olivine-rich bedrock in the central peaks of Copernicus Crater on the Moon.
There is only a handful of very important scientists, like Nicolaus Copernicus (1473-1543)
who have craters named after them on both Mars and the Moon. ID
: 25 March 2013 altitude
: 253 km
#Mars #science #NASAtwitter
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