The official line at Calico was, Leakey's selections of natural vs artificial seemed to be irreproducible. Overall, Leakey's view that the Americas must have been occupied more than the then-dominant view was obviously correct. Before Clovis-first-and-only, the official line was that the Americas had been colonized a mere 3000 years ago, or perhaps 5000 years ago. Archaeology of the Americas needs a dental plan, it's like pullin' teeth...
Calico: A 200,000-year Old Site In The Americas?
ASA On Line | unknown
Posted on 12/17/2001 2:22:22 PM PST by blam
http://www.freerepublic.com/focus/news/592435/posts
Guess what I found archived in my stuff from back when it happened... The prismatic blades are pretty hard to discredit.
https://www.earthmeasure.com/calico/