RUSSIAN JOURNAL OF EARTH SCIENCES VOL. 8, ES1004, doi:10.2205/2006ES000191, 2006

The Geomagnetic Polarity and Frequency of Geomagnetic Reversals

2006ES000191-fig01
Figure 1
[6]  We analyzed the polarity and reversal frequency of the geomagnetic field using the geomagnetic polarity time-scale reported in [Gradstein et al, 2004]. Using this scale, we plotted reversal frequency curves, using the number of reversals for the time period of one million years, and the curves of the geomagnetic field polarity in per cent for one million years (Figure 1). This Figure shows that the P/T boundary and the time of the maximum Siberian trap activity fell into the time interval of frequent reversals and, hence, frequent geomagnetic polarity changes, without being reflected in the geomagnetic field characteristics. The coinciding peaks of the biota change and of the Siberian trap magmatism "lag behind" from the boundary between the Kiama and Illawara hyperchrons by 15 million years.


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Citation: Pechersky, D. M. (2006), Geomagnetic field in the vicinity of the Paleozoic-Mesozoic boundary and the Siberian superplume, Russ. J. Earth Sci., 8, ES1004, doi:10.2205/2006ES000191.

Copyright 2006 by the Russian Journal of Earth Sciences

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