Reports

Geomagnetic Reversal in Brunhes Normal Polarity Epoch

Science  07 Feb 1969:
Vol. 163, Issue 3867, pp. 565-567
DOI: 10.1126/science.163.3867.565

Abstract

The magnetic stratigraphly of seven cores of deep-sea sediment established the existence of a short interval of reversed polarity in the upper part of the Brunches epoch of normal polarity. The reversed zone in the cores correlates well with paleontological boundaries and is named the Blake event. Its boundaries are estimated to be 108,000 and 114,000 years ago ± 10 percent.

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