[pey-lee-oh-mag-ni-tiz-uhm or, especially Brit., pal-ee-]
or palaeomagnetism or remanent magnetism

Permanent magnetism in rocks, resulting from the orientation of the Earth's magnetic field at the time of rock formation in a past geologic age. It is a source of information for the paleomagnetic studies of polar wandering and plate tectonics.

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