Volcanic records of the Laschamp geomagnetic excursion from Mt Ruapehu, New Zealand
We present palaeodirectional records of the Laschamp geomagnetic excursion from lavas on Mt Ruapehu, New Zealand. Fourteen lava flows on the northwestern and southern flanks of Mt Ruapehu, with 40Ar/39Ar weighted mean plateau ages that range from 46.3±2.0 to 39.9±1.4 ka, were studied. The youngest and older flows carry a normal polarity magnetization; however, six flows, dated between 46.3±2.0 and 42.7±1.8 ka, record excursional directions. Three of these flows record southerly palaeomagnetic...[Show more]
|Collections||ANU Research Publications|
|Source:||Earth and Planetary Science Letters|
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