RUSSIAN JOURNAL OF EARTH SCIENCES VOL. 8, ES1004, doi:10.2205/2006ES000191, 2006
The Geomagnetic Polarity and Frequency of Geomagnetic Reversals
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Figure 1
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[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.

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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