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Science 20 April 1990:
Vol. 248. no. 4953, pp. 345 - 350
DOI: 10.1126/science.248.4953.345
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Articles

Paleomagnetism and the Nature of the Geodynamo

R. T. Merrill 1 and P. L. McFadden 2

1 Departments of Geophysical and Geological Sciences, University of Washington, Seattle, WA 98195
2 Division of Geophysics, Bureau of Mineral Resources, Canberra, Australia 2601

Records of direct observations of the earth's magnetic field cover less than a ten-millionth ofthe known lifetime of the field. Thus our knowledge of several geomagnetic phenomena, critical to our understanding of the geodynamo, must come firom the paleomagnetic record. A combination of substantial advances during the past decade or so both in dynamo theory (previously the domain of the mathematician) and in paleomagnetism (previously the domain of the geologist) has led to provocative models of the earth's magnetic field and a better understanding of the geodynamo.


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