42,000-Year-Old Trees Enable Accurate Analysis of Earth’s Last Magnetic Field Reversal – Brinkwire

Radiocarbon measurements on the remains of 42,000-year-old New Zealand kauri trees provide the basis for better calibration of geological archives of this period.
The last complete reversal of the Earths magnetic field, the so-called Laschamps event, took place 42,000 years ago. Radiocarbon analyses of the remains of kauri trees from New Zealand now make it possible for the first time to precisely time and analyze this event and its associated effects, as well as to calibrate geological archives…

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