Paleomagnetism and radiochemical age estimates for Late Brunhes polarity episodes

Details Paleomagnetism and radiochemical age estimates for Late Brunhes polarity episodes Paleomagnetism and radiochemical age estimates for Late Brunhes polarity episodes

Jul 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977e%26psl..35..384d&link_type=abstract

Earth and Planetary Science Letters, Volume 35, Issue 3, p. 384-397.

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Scientific paper

Several reversed polarity magnetozones occur within deep-sea sediment core CH57-8 from the Greater Antilles Outer Ridge, within sediment of latest Pleistocene/Late Brunhes age. The uppermost reversed interval spanning 31 data points coincides with the X faunal zone of the Last Interglacial Period. Radiochemical dating of cores CH57-8 and KN25-4 has shown that all the reversed polarity magnetozones are significantly younger than the Brunhes/Matuyama boundary at 0.7 m.y. B.P. A variation of the excess 230Th method was used, in which 210Po and 238U were the actual radionuclides measured. In a third core from the Mid-Atlantic Ridge, our 210Po results were similar to those which others obtained earlier by direct 230Th measurements.

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