Age and duration of the réunion geomagnetic polarity event |
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| Authors: | Ian McDougall ND Watkins |
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| Institution: | Research School of Earth Sciences, Australian National University, Canberra, ACT 2600,Australia;Graduate School of Oceanography, University of Rhode Island, Kingston, RI 02881,USA |
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| Abstract: | Palaeomagnetic studis on oriented samples from two sequences of olivine basalt lava flows on the island of Réunion together record the Réunion normal polarity event within the Matuyama reversed polarity epoch. Detailed K?Ar dating of the lavas indicates that the Réunion event has a mean age 2.02±0.02 my with a duration estimated to lie within the range 10,000 to 50,000 yr. This could explain the rarity of detection of the event in deep sea sedimentary cores. |
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