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Geomagnetic polarity epochs: A new polarity event and the age of the Brunhes-Matuyama boundary

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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.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Geomagnetic polarity epochs: A new polarity event and the age of the Brunhes-Matuyama boundary
Series title:
Science
Volume
152
Issue:
3725
Year Published:
1966
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Science
First page:
1060
Last page:
1061
Number of Pages:
2