Archaeologists today can trace extensive trade networks, especially in the types of stone used for chipped stone tools, some of which were only used locally, but others of which were traded over many miles.

Obsidian from Yellowstone has been found in Illinois Hopewell sites. Alibates flint from North Texas is found widely distributed, and there are other examples.

I can imagine heated discussions around the campfires of old, discussing the merits and demerits of this or that obsidian or flint, the best heat treatment(Yes, you can heat treat flint), etc. etc. Modern day knife junkies would feel right at home.
Geezer in Chief