Anthropology

Interesting but not surprising. I live about 65 miles from Obsidian Cliff, it's the one in YNP. The site in Idaho is not far from there and is occasionally where some anthropology summer field camps are held, my alma mater being one of them - Idaho State U..

That being said, there is an abundance of obsidian in the region as the 'hot spot' lava pool is enormous and would destroy large portions of three states if/when it blows up. Our 'black sand' is obsidian sand, tires don't last as long if you do a lot of dirt road travel, other things are also affected by the sharp particles, going barefoot not recommended.

Originally I was going to jokingly tell you,

"...yeah, that obsidian stuff grows all over the place around here."

Thanks for posting all these anthro articles, I try to read them all. They're great mental floss!