'blueberries' can also refer to...


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Small mineral spheres observed in 2004 by the Mars Exploration Rover Opportunity. Despite their nickname, the spherules are grey rather than blue in colour, and are only a few millimetres across. The rover's Mössbauer spectrometer (see mössbauer spectrometry) revealed that the blueberries are rich in hematite.

Subjects: Earth Sciences and Geography.

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