One such site is fewer than 50 miles from my home -- the
Meadowcroft Rockshelter. If the Meadowcroft folks are correct, the history of humanity in the Americas goes back waaaaay before the Clovis era. However, there remains some controversy about dating of various levels and artifacts -- the clovis-first folks are quite unhappy with the Meadowcroft dates.
That seems rather odd to me, because the excavation, fieldwork, record-keeping, and testing done at/for the Meadowcroft site are supposedly some of the finest for any archaeological site anywhere. (That's according to friends of mine who are professionals --
I wouldn't be able to tell the difference between OK & great.)
Xenophon