E. A. Mankinen 1989 <div class=""><div class="article-section__content en main"><p>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 α₉₅<span>&nbsp;</span>= 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.</p></div></div> application/pdf 10.1029/GL016i010p01081 en American Geophysical Union Revised paleomagnetic pole for the Sonoma Volcanics, California article