Loren Davis first excavated Cooper's Ferry in 1997, finding western stemmed points whose associated bone and charcoal initially produced radiocarbon dates of up to 13,300 years old.
Sources
- 15,000-year-old Idaho archaeology site now among America's oldest (nationalgeographic.com)
- https://www.smithsonianmag.com/smart-news/idaho-site-shows-humans-were-north-america-16000-years-ago-180973024/ (smithsonianmag.com)
- https://www.opb.org/news/article/oregon-state-university-oldest-human-artifacts-idaho-north-america/ (opb.org)
- https://grokipedia.com/page/Cooper's_Ferry_site (grokipedia.com)
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