geomagnetic reversal


Also found in: Dictionary, Wikipedia.
Related to geomagnetic reversal: Geomagnetic field

geomagnetic reversal

[¦jē·ō·mag¦ned·ik ri′vər·səl]
(geophysics)
Reversed magnetization of the earth's magnetic dipole.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
Mentioned in ?
References in periodicals archive ?
The geomagnetic reversals which were the subject of the Vine - Matthews hypothesis constitute such a scientific phenomenon, more general than the data themselves, yet independent from the theory of plate tectonics.
thesis at the Centre des Faibles Radioactivites at Gif/Yvette by trying to extract information from the magnetization of tiny specimens of sediment, hoping that they would tell him something about geomagnetic reversals. He is now working at the Institut de Physique du Globe de Paris, looking at various kinds of materials, sediments and basalts, that record geomagnetic field variations.
One sign of this comes from patterns of geomagnetic reversals, when Earth's north and south magnetic poles swap positions.
But even as their databases grew, the study of geomagnetic reversals foundered for lack of new theories to guide the research.
Clement of Florida International University in Miami sent out a wake-up call that roused the paleomagnetic community and packed the halls of scientific conferences dealing with geomagnetic reversals. Working independently, Clement and Laj's team concluded that the magnetic field, quite unexpectedly, had displayed a persistent pattern of behavior during recent reversals - a finding that promised to reveal fundamental insights into the workings of the planer's deep interior.
There is evidence, although some call it statistically marginal, that the rate of geomagnetic reversals peaked during the mass extinctions.
But the actual frequency of geomagnetic reversals can vary considerably.