I saw, many years ago, a story about how the many of the oldest flint arrow heads, and tools, found in North America, are very similar to those of a similar age found in North Western Europe, and dissimilar to those of a similar age found in North Eastern Asia.
I have a small grooved “celt” identical to those found in Europe.
One of my kin found it lying on the ridge amongst the so-called “Indian mounds”.