[29] The analyzed materials make it possible to note that in the paleointensity behavior one can reveal three types of periodical variations different by the amplitude and duration.
[30] 1. Paleointensity variations during quiet regimes of geomagnetic field generation occur with an amplitude of up to 0.5 H0 and periodicity of the order of tens of millennia. This periodicity coincides to the periodicity in changes of paleointensity and volcano activity during the current magnetopolar epoch.
[31] 2. The change of the geomagnetic field generation regimes occurs with a periodicity of a few hundreds millennia.
[32] 3. The periodicity of paleointensity bursts occurrence is a few millions years. During the bursts the paleointensity can increase up to 3 H0 and higher. The mean paleointensity values of the lower Cretaceous intervals of direct geomagnetic polarity coincide with the mean paleointensity of the current magnetopolar epoch. In the time interval studied, no differences in paleointensity behavior is found for the epochs of predominant stretching and predominant compression of the Earth crust.
Citation: (2004), Paleointensity behavior in Barremian--Cenomanian (Cretaceous), Int. J. Geomagn. Aeron., 5, GI1004, doi:10.1029/2003GI000043.
Copyright 2004 by the American Geophysical Union