I don't know anything about the stone in your area, so I don't know if the points you find in that area are all that thick. The point is fluted on both sides, there does not seem to be any evidence of any pressure flaking except for the notches. My guess is late Paleo to early Archaic. About 10,000 to 8,000 years old, at a guess. No real tribe, ALL people were hunter/gathers then. It looks like it would do well as a thrusting spear. It could be a Paleo point that has been reworked by a later knapper, he would have made it into a point he was more familiar with. Bill