Some years ago I was talking with a woman archeologist in a bar. She told me about a site in California that was around 200 to 300,000 years old but was being rejected by the scientific establishment. I wonder whatever happened to that site.
His book, Earlier Than You Think is a good read.
"His geologist's background and unending curiosity allowed him to see evidence where others' untrained eyes saw only a few broken rocks. The book is filled with charming anecdotes about archaeological digs Carter has worked on and infuriating tales about how the establishment has sought to quiet him. Although he did not personally work on it, the Calico site in California is included for reference and is the only site in North America that famed archaeologist Dr. Louis Leakey supervised"
Carter got so pissed that archaeologists wouldn't listen to him that he got a (I believe) PhD in archaeology. Still they didn't listen.