Geomagnetic Field:ReversalsAMONG the many surprising results of studies of the natural remanent magnetization of rocks 1 , one of the most curious has been the conclusion that the Earth's magnetic field has undergone changes of polarity; that, in fact, reversals of the main field have been a ...
Some volcanic rocks are magnetized in a direction opposite to that of the present magnetic field of the earth. The reason is that the earth's field has reversed nine times in the past 3.6 million years
IN a recent study of the natural remanent magnetization of the Upper Lias Sands of the West of England, seventeen samples collected from two sites were found to have reverse directions of magnetization. Samples a little higher and lower in the succession were found to be normally magnetized. ...
Evolutionary processes and reversals of the Earth's magnetic field, Nature, 217, 46–47.Evolutionary processes and reversals of the earth’s magnetic field - A - 1968HARRISON C.G.A., 1968. Evolutionary processes and reversals of the earth's magnetic field. Nature, 217, 46-47....
We have used techniques of nonlinear dynamics to compare a special model for the reversals of the Earth's magnetic field with the observational data. Although this model is rather simple, there is no essential difference to the data by means of well-known characteristics, such as correlation fun...
VIRTUAL geomagnetic poles (VGPs) recorded in sediments during reversals of the Earth's magnetic field show an apparent preference for two antipodal sectors of longitude 1鈥 3 , not only in records of the same reversal from different sites, but also in records of different reversals. If ...
Roget's WordNet nounturnaround Synonyms turnaround U-turn backtracking turnabout shift swing change of heart turnround volte-face nounchange Synonyms change overturning setting aside undoing repeal quashing overruling rescinding retraction revocation ...
Reversals of the Earth's Magnetic Field One of the most intriguing problems in geophysics to-day is why the Earth's magnetic field reverses. This review summarizes the progress in our knowledge o... JA Jacobs,GM Turner - 《Geophysical Journal International》 被引量: 531发表: 1995年 RECENT ...
A proper combination of these magnetic measurements leads to the determination, every meter, of natural remanent magnetization polarity, from which the direction of the Earth's magnetic field at the time of sedimentation is derived. A magnetostratigraphic sequence is obtained for each well and ...
VIRTUAL geomagnetic poles (VGPs) recorded in sediments during reversals of the Earth's magnetic field show an apparent preference for two antipodal sectors of longitude1–3, not only in records of the same reversal from different sites, but also in records of different reversals. If preferred ba...