Zircon crystal against US dime for scale. (IMAGE)

Proceedings of the National Academy of Sciences

Zircon crystal against US dime for scale.

Caption

Zircon crystal against US dime for scale. Measurements of the magnetization of magnetic inclusions in zircons are amongst the most challenging, and reveal the Hadean geomagnetic field.

Credit

Image courtesy of Julie Mansy (photographer), Rory D. Cottrell (University of Rochester, Rochester, NY), and John A. Tarduno (University of Rochester, Rochester, NY).

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