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Palaeomagnetism
Magnetic inclination

When a rock is cools the magnetic minerals align parallel to
the magnetic field: when they reach the Curie point

The Curie point

The Curie point is the temperature at which certain materials
lose their permanent magnetic properties, to be replaced by
induced magnetism.

Orientation gives the…

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Assumes rocks have not been overturned or magnetically disturbed since
formation

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