Kauri trees mark magnetic flip and environmental crisis 42,000 years ago

[Oxytropidoceras]

Ancient kauri trees capture last collapse of Earth’s magnetic field

By Paul Voosen, Science, February 18, 2021

 

Ancient Trees Show When The Earth's Magnetic Field Last Flipped Out

By Nell Greenfield-Boyce, Short Wave, NPR, February 18, 2021

 

Buried treasure - subfossil swamp kauri

By Kate Evans, New Zealand Geographic

 

Voosen, P., 2021, Kauri trees mark magnetic flip 42,000 years ago

Science. vol. 371, Issue 6531, pp. 766 DOI: 10.1126/science.371.6531.766

 

The paper is:

 

Cooper, A., Turney, C.S.M., Palmer, J. and others,

2021, Global environmental crisis 42,000 years ago

Science. Vol. 371, Issue 6531, pp. 811-818

 

Related paper

 

Staff, R.A., Hardiman, M., Ramsey, C.B., Adolphi, 

F., Hare, V.J., Koutsodendris, A. and Pross, J., 2019. 

Reconciling the Greenland ice-core and radiocarbon 

timescales through the Laschamp geomagnetic 

excursion. Earth and Planetary Science Letters, 520, pp.1-9.

 

Yours,

 

Paul H.