Physics
Scientific paper
Dec 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jgr....9822461m&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 98, no. B12, p. 22461-22475
Physics
12
Geochronology, Geomagnetism, Magnetic Poles, Paleomagnetism, Remanence, Reversing, Three Dimensional Models, Cartesian Coordinates, Data Bases, Dynamo Theory, Magnetization, Mathematical Models, Volcanology
Scientific paper
Representations of the reversing geomagnetic field are generally based on paleomagnetic directions or virtual geomagnetic poles, i.e., one coordinate related to field intensity is missing. Interpretations based on these representations have led to conflicting models of reversals. We have assembled records of reversals for which an intensity determination is available, either absolute (volcanic sequences) or relative (sedimentary sequences), and we have chosen to represent them in terms of directions in local Cartesian coordinates: this representation is identical to the Zijderveld representation which is traditional in paleomagnetism. The 38 selected records correspond to Matuyama-Brunhes, Jaramillo, Olduvai and some older reversals up to 5 m.y. old. A total of 22% are from volcanic sequences and the rest from sedimentary ones.
Courtillot Vincent
Mary Claire
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