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Palaeomagnetism

Core message

Archaean and early Proterozoic rocks reveal that the Earth's magnetic field two billion years ago behaved differently than over most of the past 200 million years. Do these changes relate to the growth of the inner core?

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Figure 1

COR LANGEREIS

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Hulot, G. Core message. Nature Geosci 1, 345–346 (2008). https://doi.org/10.1038/ngeo213

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