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Showing results for tags 'radiocarbon'.
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Pre–Younger Dryas megafaunal extirpation in southern California
Oxytropidoceras posted a topic in Fossil News
How Early Humans May Have Transformed L.A.’s Landscape Forever Science Friday, NPR, August 25, 2023 Uncovering Death by Fire 13,000 years ago Micheal Price, Sciences News, August 17, 2023 La Brea Tar Pits Reveal Clues to Mysterious Mass Extinction By Shana Hutchins, Futurity, August 18, 2023 The paywalled paper is: O’Keefe, F.R., Dunn, R.E., Weitzel, E.M., Waters, M.R., Martinez, L.N., Binder, W.J., Southon, J.R., Cohen, J.E., Meachen, J.A., DeSantis, L.R. and Kirby, M.E., 2023. Pre–Younger Dryas megafaunal extirpation at Rancho La Brea linked to fire-driven state shift. Science, 381(6659), p.eabo3594. Yours, Paul H.-
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- megafauna
- extinction event
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Kauri trees mark magnetic flip and environmental crisis 42,000 years ago
Oxytropidoceras posted a topic in Fossil News
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.-
- geomagnetic change
- swamp kauri
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Researchers unlock secrets of the past with new international carbon dating standard University of Sheffield, August 12, 2020 PhysOrg Article about IntCal20 University of Arizona Press Release about IntCal20 "Radiocarbon dating is set to become more accurate than ever after an international team of scientists improved the technique for assessing the age of historical objects." PDFs of Various open access papers about IntCal 20 Yours, Paul H.
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- carbon dating
- radiocarbon
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