Sediment layers containing pre-Clovis artifacts at Page-Ladson also contained remains of an extinct prehistoric camelid, bison, and mastodon.
Notes on verification
Directly confirmed by the peer-reviewed primary source (Halligan et al. 2016, Science Advances) which explicitly lists mastodon, camelid, and bison remains in the same deposits as pre-Clovis artifacts. Corroborated by multiple independent secondary sources with no contradictions. [tier=gold indep_score=0.983 clusters=3 claim_tier=notable]
Sources
- Discovery Points to Earlier Arrival of First Americans (seed:history_and_archaeology)
- https://www.science.org/doi/10.1126/sciadv.1600375 (corroboration)
- https://www.researchgate.net/publication/303052097_Pre-Clovis_Occupation_14550_Years_Ago_At_The_Page-Ladson_Site_Florida_And_The_Peopling_Of_The_Americas (corroboration)
- https://pubmed.ncbi.nlm.nih.gov/27386553/ (corroboration)