Geomagnetic Polarity Epochs: A New Polarity Event and the Age of the Brunhes-Matuyama Boundary
- 20 May 1966
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 152 (3725) , 1060-1061
- https://doi.org/10.1126/science.152.3725.1060
Abstract
Recent paleomagnetic-radiometric data from six rhyolite domes in the Valles Caldera, New Mexico, indicate that the last change in polarity of the earth's magnetic field from reversed to normal (the Brunhes-Matuyama boundary) occurred at about 0.7 million years ago. A previously undiscovered geomagnetic polarity event, herein named the "Jaramillo normal event," occurred about 0.9 million years ago.Keywords
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