geomagnetic reversal

(redirected from Magnetic polarity reversal)
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geomagnetic reversal

n.
A change in the earth's magnetic field resulting in the switch in position of the earth's magnetic north and south poles. Also called magnetic reversal.
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These magnetic polarity reversals have been well-documented, and so by analyzing rocks' magnetic properties, Tivey can date them and chronicle the geological processes in which they formed.