Here is the link to the PLOS paper...
https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0141923
It’s worth noting...it’s about as far south as you can go in Chile (500 miles from the end-point).
Fyi
It was only a decade or two ago that all college courses taught that the earliest Western Hemisphere humans were the Clovis Culture at approximate 13k years ago. It was the equivalent of the infamous phrase ‘settled science’!
Another item of recent scientific reconsideration, the planets of our Solar System have been in stable orbits since shortly after planetary consolidation. The THEORY of the Jupiter Grand Tack has its origins in the numerous ‘Hot Jupiters’ found in the exo-planet searches of recent years.
This is why I DESPISE the term ‘settled science’ as an utterly vapid argument in any field. History is full of consensus theories that have been overthrown by later research. As the late Arthur C Clarke states in his first law; “When a distinguished but elderly scientist states that something is possible, he is almost certainly right. When he states that something is impossible, he is very probably wrong.”
Time and our dynamic earth have buried more than we will ever know.
Then, a lot of what has been buried is later consumed, over long periods of time, in the plate tectonics, as the edge of some plate is submerged below another plate and what remains on it is crushed to extinction by the heat and pressures below the surface.
Who knows but what we call the ancient past today is not actually young compared to some period we will never seee the evidence of.