The Paleomagnetic Field from Equatorial Deep-Sea Sediments: Axial Symmetry and Polarity Asymmetry | Zendy

David A. Schneider | Zendy; Dennis V. Kent | Zendy

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The Paleomagnetic Field from Equatorial Deep-Sea Sediments: Axial Symmetry and Polarity Asymmetry

Author(s) -

David A. Schneider,

Dennis V. Kent

Publication year - 1988

Publication title -

science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 12.556

H-Index - 1186

eISSN - 1095-9203

pISSN - 0036-8075

DOI - 10.1126/science.242.4876.252

Subject(s) - paleomagnetism , polarity (international relations) , earth's magnetic field , dynamo , geology , asymmetry , paleontology , dynamo theory , geophysics , geomagnetic reversal , field (mathematics) , magnetostratigraphy , symmetry (geometry) , oceanography , magnetic field , physics , geometry , chemistry , biochemistry , mathematics , quantum mechanics , pure mathematics , cell

Paleomagnetic data from 89 equatorial deep-sea sediment cores indicate that the configuration of the time-averaged geomagnetic field depends strongly on polarity state but that it remains within 1 degree of axial symmery throughout the Pliocene and Pleistocene (last 5 million years). The relative magnitude of the nondipole field was greater by almost a factor of 2 during reverse than during normal polarity intervals. These results thus support earlier suggestions that there may be a standing (nonreversing) component of the geomagnetic dynamo.

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