Titlebook: Geomagnetism and Palaeomagnetism; F. J. Lowes,D. W. Collinson,A. Soward Book 1989 Kluwer Academic Publishers 1989 Catalog Service for the

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Magnetic Polarity Time Scales and Reversal Frequencyrsal frequency. The polarity sequence since the middle Jurassic has been largely confirmed and dated as a result of coordinated magnetostratigraphic and palaeontological investigations. Different polarity time scales for the same interval reflect successive improvements in the definition of the pola

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Observations and Models of Reversal Transition Fields that.The field was not dipolar during the last reversal, but was dominated by zonal harmonics. Models of the transition field geometry which include zonal harmonics and a drifting non-dipole field are able to simulate some aspects of reversals, but we still do not have a satisfying understanding of

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A Phenomenological Model for Reversals of the Geomagnetic Fieldution of the system. When the number N of dipoles is low, and for a wide range of the coupling between the dipoles, we observe sudden transitions or excursions between two polarised states. Thus our system provides artificial polarity time-scales which can be compared with the geomagnetic one. It is

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Deterministic Chaos, Geomagnetic Reversals, and the Spherical Pendulumne. The chaotic motion of a forced spherical pendulum is used to exemplify these ideas. Reasons are given why geomagnetic reversals might be interpreted as chaotic and the implications discussed. Some statistical data on the pendulum motion are presented in a form that may allow comparison with geom

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Paleontology

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Digitale Videostandards im Vergleich, that.The field was not dipolar during the last reversal, but was dominated by zonal harmonics. Models of the transition field geometry which include zonal harmonics and a drifting non-dipole field are able to simulate some aspects of reversals, but we still do not have a satisfying understanding of transition field geometries.

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