[31R1O]

That obsidian flow is pretty neat, went there a few years back.

https://www.usgs.gov/volcanoes/newberry/big-obsidian-flow

[Tilted Irish Kilt]

31R1O :" That obsidian flow is pretty neat, went there a few years back.That obsidian flow is pretty neat, went there a few years back. "

That's about 2485 miles away !
They chose a site almost 2500 miles away to chip the obsidian/ chert into projectile points or some other form ?
Possibly demonstrates some form of trade in existence some 9,000 years ago ?