The log, which is 16m long and weighs 60 tonnes, was found during excavation for a new geothermal power station near Ngāwhā Springs earlier this year.
Last week, scientists completed a radiometric analysis to reveal the kauri stood between 41,000 and 42,500 years ago – making it the only tree found anywhere in the world that was alive during a mysterious shift in the world’s magnetic field.
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