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Long Period Fourier Spectrum of Geomagnetic Reversals


THE hypothesis of ocean floor spreading1 has prompted investigations of all aspects of the geomagnetic field. The existence of magnetic “epochs”, which show predominantly one polarity for a period of about 1 m.y., and magnetic “events”, with duration of the order of 200,000 years, has been demonstrated2, and there are now sufficient data on the magnetic polarity during the Phanerozoic to study the alternation of geomagnetic polarity over a longer period of time.


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CRAIN, I., CRAIN, P. & PLAUT, M. Long Period Fourier Spectrum of Geomagnetic Reversals. Nature 223, 283 (1969).

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