Revised paleomagnetic pole for the Sonoma Volcanics, California

E. A. Mankinen

doi:10.1029/gl016i010p01081

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Revised paleomagnetic pole for the Sonoma Volcanics, California

E. A. Mankinen

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Abstract

Paleomagnetic sampling of the Miocene and Pliocene Sonoma Volcanics, northern California, was undertaken to supplement an earlier collection. Data from 25 cooling units yield positive fold and reversal tests, and a paleomagnetic pole located at 80.2°N., 069.2°E., with α 95 = 6.8°. This paleopole is significantly displaced (9.6° ± 5.3° of latitude) to the farside of the geographic pole. A highly elliptical distribution of the data in both direction and VGP space indicates that incomplete averaging of geomagnetic secular variation is a more likely explanation for this anomaly than is northward translation of the volcanic field.

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E. A. Mankinen. 2012-12-07. Revised paleomagnetic pole for the Sonoma Volcanics, California. https://doi.org/10.1029/gl016i010p01081

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