Americas’ earliest sites questioned
New research is challenging the dates of several sites long claimed as the oldest human occupations in the Americas, suggesting some may be younger than previously believed — a debate that could reshape migration chronologies. Coverage frames this as a significant reassessment with implications for how and when peoples first populated the New World. (timesofindia.indiatimes.com) (dailygalaxy.com)
A team led by University of Wyoming archaeologist Todd A. Surovell published a paper in Science on March 19, 2026 that the authors say is the first independent field investigation of the Monte Verde site in nearly 50 years. (science.org) The paper reports that radiocarbon and luminescence dates from alluvial exposures, together with identification of a tephra layer dated to ~11,000 years B.P. beneath the archaeological component, indicate Monte Verde “cannot be older than the Middle Holocene” (about 8,200–4,200 years B.P.), according to the authors. (science.org) Surovell’s team says their reinterpretation rests on sediment cores and stratigraphic sampling from multiple locations along the Chinchihuapi Creek, with media summaries reporting samples from nine areas and the paper giving an MV‑II age window near 4,200–8,200 years B.P. for the archaeological component. (clickondetroit.com) Monte Verde II was originally excavated from 1977–1985 by Tom Dillehay and had long been published as roughly ~14,500 years B.P.; that earlier MV‑II chronology was externally validated in 1997 and helped overturn the earlier “Clovis‑first” consensus. (science.org) The new paper has drawn sharp pushback: Texas A&M archaeologist Michael Waters called the geological interpretation “at best a working hypothesis,” other specialists criticized the study as “egregiously poor geological work,” and Tom Dillehay’s team and the Fundación Monte Verde say they will answer what they call methodological and empirical errors. (usnews.com) In the paper the authors explicitly state that if Monte Verde is not the pre‑Clovis anchor it has been considered, the chronology for human arrival in South America shifts toward a more recent timing and they urge independent reanalysis of other early sites to reassess the peopling timeline. (science.org)
