Archaeologists found a bifacial stone knife and other stone artifacts at Florida's underwater Page-Ladson site dated to 14,550 years ago, about 1,500 years before Clovis points spread around 13,000 years ago.
Sources
- Discovery Points to Earlier Arrival of First Americans (nationalgeographic.com)
- https://www.science.org/doi/10.1126/sciadv.1600375 (science.org)
- https://www.earthmagazine.org/article/underwater-archaeology-reveals-pre-clovis-people-butchered-mastodon-florida/ (earthmagazine.org)
- https://www.aaas.org/news/stone-tools-butchered-mastodon-prehistoric-site-florida-confirm-pre-clovis-peopling-americas (aaas.org)
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