Mesozoic dipole low: Myth or reality?

Authors

  • Avto Goguitchaichvili,

    1. Laboratorio de Paleomagnetismo y Geofisica Nuclear, Instituto de Geofisica, UNAM, Ciudad Universitaria, 04510 Mexico DF, Mexico
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  • Jaime Urrutia-Fucugauchi,

    1. Laboratorio de Paleomagnetismo y Geofisica Nuclear, Instituto de Geofisica, UNAM, Ciudad Universitaria, 04510 Mexico DF, Mexico
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  • Luis Alva-Valdivia

    1. Laboratorio de Paleomagnetismo y Geofisica Nuclear, Instituto de Geofisica, UNAM, Ciudad Universitaria, 04510 Mexico DF, Mexico
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Abstract

Study of the long-term variation of polarity and paleo-direction of the Earth's magnetic field in the Precambrian and Phanerozoic has proved valuable in geosciences. Magnetic polarity in the Mesozoic and Cenozoic is fairly well established, with some first-order trends defined for older times. Defining Earth's comparable long-term dipole moment variation has proved far more difficult [e.g., Selkin and Tauxe, 2000]. Among many other findings, magnetic polarity studies have defined several first-order features like the Permo-Triassic and Cretaceous superchrons, characterized by constant reverse and normal polarity, respectively, over long intervals.

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