The earth's core

Physics

Scientific paper

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Dynamo Theory, Earth Core, Geophysical Fluids, Convective Flow, Geomagnetism, Iron Alloys, Magnetic Field Configurations, Planetary Evolution, Protoplanets, Seismic Waves, Temperature Effects, Terradynamics

Scientific paper

The relationship of the earth's core to the geomagnetic field is discussed. The physical makeup of the core is addressed, including theories as to the nature of the light component of the core and the influence of he core's temperature structure on its makeup. The two distinct mechanisms, thermal and compositional, that have been proposed for driving the convective flow that generates the earth's magnetic field within the outer core are discussed. The wandering of the magnetic field during a reversal is traced, and the question of how and when the core formed and in what way the process was related to the birth of the planet are considered. The two main hypotheses, homogeneous accretion and heterogeneous accretion, which attempt to describe the formation of the earth are covered.

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