锆石晶与十美分硬币的大小比较 (IMAGE)

Proceedings of the National Academy of Sciences

锆石晶与十美分硬币的大小比较

Caption

锆石晶与十美分硬币的大小比较。分析和测量锆石晶中的磁铁矿晶体的磁化程度难度巨大；这类分析揭示了了冥古宙时期的地球磁场。

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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