I think most of those skeletons would be dust by now, especially since in many areas, whole tribes were wiped out, with nobody left to bury the dead.
“I think most of those skeletons would be dust by now,”
Yes, the ones killed by plague and unburied would be dust. But if the Northeast had a population of several tens of millions, then, if they had been there for a while, there would be several million Native Americans buried- the ancestors of the living ones.