Years ago, say 1925 or so, my uncle’s brother was plowing his field on the banks of the Clinch River in Union county Tennessee. I helped him to discover what it was worth and did some reading. It was a Celt, a wonderfully crafted stone ax. I learned that celts were found at other locations on the Clinch.
In May of 2012 we visited Cahokia where there is a great museum. there were several exhibits with celts. One was concerned with two celt factories...... places where tons of celts were discovered. Some were damaged and it was believed they were being sharpened. To my eye, they were identical to the one found on the Clinch River. They seemed to be the same bluegray stone
The conclusion was the folks on the Clinch in East Tennessee had something to trade for celts with the folks at Cahokia.
Lekson’s rules apply
We find chert flint points in front of my parents place. The closest source is 150 miles away.
Do you know about the Eastern Agricultural Complex? Not just the black drink is part of it, but things like relatives of the quinoa now becoming popular, which is from South America originally. There is a list of cultivated varieties of plants now just growing as weeds, that seem to be from a culture there that only existed in fragments when British colonists were settling in.