Articles | Volume 7, issue 4
https://doi.org/10.5194/gchron-7-459-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gchron-7-459-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
10 Oct 2025
Research article |
| 10 Oct 2025
| 10 Oct 2025
Carbonate 206Pb ∕ 238U problems and potential 207Pb ∕ 235U fixes
Dept. of Earth Sciences, University College London, London, WC1E 6BT, UK
Noah McLean
Dept. of Geology, University of Kansas, Lawrence, KS 66045, United States
Anton Vaks
Geological Survey of Israel, 9692100 Jerusalem, Israel
Tzahi Golan
Geological Survey of Israel, 9692100 Jerusalem, Israel
Sebastian F. M. Breitenbach
Dept. of Geography and Environmental Sciences, Northumbria University, Newcastle upon Tyne, NE1 8ST, UK
Randall Parrish
Dept. of Geography and Geosciences, University of Portsmouth, Portsmouth, PO1 3QL, UK
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Short summary
U–Pb dating of cave sediments has provided important new time constraints on the evolution of cave-dwelling organisms (including early humans) and of Earth's climate during the past 5 Myr. This paper shows that the most common type of U–Pb dating, which uses 238U and 206Pb, can be inaccurate beyond ca. 2 Myr ago. It proposes an alternative type of U–Pb dating, using 235U and 207Pb, as a more accurate alternative.
U–Pb dating of cave sediments has provided important new time constraints on the evolution of...
