Two of the seven sites analyzed in the 2009 Surovell et al. study had previously been examined by Firestone et al. in their original 2007 study.
Sources
- An independent evaluation of the Younger Dryas - jstor (jstor.org)
- https://www.pnas.org/doi/10.1073/pnas.0907857106 (pnas.org)
- https://experts.arizona.edu/en/publications/an-independent-evaluation-of-the-younger-dryas-extraterrestrial-i/ (experts.arizona.edu)
- https://www.scienceopen.com/hosted-document?doi=10.14293%2FACI.2026.0005 (scienceopen.com)
- https://www.pnas.org/doi/10.1073/pnas.1208603109 (pnas.org)
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