Hueyatlaco site dating controversy

Record summary

Hueyatlaco is a locality within the Valsequillo controversy where archaeological materials were reported in association with Pleistocene deposits and assigned dates much older than the accepted chronology for human settlement in the Americas. The site matters because it brings together uranium-series dating, stratigraphic interpretation, volcanic geology, and the possibility of redeposition. Later researchers disputed whether the dated layers and artifacts were genuinely associated. The principal uncertainty is not simply the numerical age, but whether the geological samples date the human activity claimed for the site.