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Tertiary geomagnetic field reversal in Scotland

1966; Elsevier BV; Volume: 1; Issue: 5 Linguagem: Inglês

10.1016/0012-821x(66)90021-5

1385-013X

Peter J. Smith,

Geological and Geochemical Analysis

Twenty-one examples in which the magnetic polarities of baked contact rocks (sediments, conglomerates and dykes) agree with those of the igneous bodies which baked them (Scottish Tertiary dykes) are presented. These agreements strengthen the evidence in favour of field reversal. If field reversal has operated solely or predominantly, almost all baking-baked pairs should agree in polarity since each component of each pair presumably cooled in the same ambient field. If self-reversal has mainly operated, however, there should be a large number of polarity disagreements between the baking and baked rocks since rocks of different character would not necessarily both have self-reversed. The Tertiary pole position derived from the paleomagnetic data from both baking and baked rocks was 73.4°N, 196.8°E.