Paleointensity behavior in Barremian-Cenomanian (Cretaceous)

Abstract

Fragmentary knowledge on geomagnetic field intensity in Barremian–Cenomanian stageobtained from sediment rocks is summarized. Three types of periodical variations arerevealed in the paleointensity behavior. The types differ by the amplitude and duration(tens of millennia, hundreds of millennia and more than million years). It is foundthat in all the magnetopolar intervals an alternating of quiet and burst-like regimes ofmagnetic field generation is observed, the regimes differing by the oscillation amplitudeand mean values of the paleointensity. It is demonstrated that the mean values of thepaleointensity of quiet regimes of geomagnetic field generation were (0.5–0.8) H