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PASSPORT TO KNOWLEDGE - To MARS with MER
I've heard Dr. Steve Squyres talk about the blueberries that have been found in the rocks on Mars and I was wondering if we have the blueberries in the rocks on Earth and if so where?
Muncie Community Schools Planetarium
The blueberries are called iron concretions and they typically form in sandstones and other layered sedimentary rocks that have undergone dysgenic alteration - water that flows through the rock with a different composition that actually seeds and deposits a different little mineral there. In the case of the blueberries it's this iron hematite and in the case of rocks on the Earth we have very similar things as well.
Rover Science Team
Jet Propulsion Laboratory