[centurion316]

Back in the day... when I was a Pleistocene geologist, I was told that anytime that I ran across human artifacts in sediments, it was 13.5 k bp or later. Ignore it and move on. I wonder if I passed up on a 50 k b.p. site along the way.

[blam]

" I wonder if I passed up on a 50 k b.p. site along the way."

Could have.

Calico: A 200,000-year Old Site In The Americas?

[blam]

Earlier Than You Think

"Our knowledge of the hundred-thousand-years of human prehistory in the Americas has grown in spite of false starts, disciplinary straitjackets, and occasional personal attacks of those who have challenged prevailing notions. George F. Carter was for forty years been at the forefront of the controversy over the age of American antiquity. Here he tells the dual story of that controversy and the fascinating unraveling of the record of human presence in the Americas."