Researchers have found shocked quartz—grains of sand deformed by extreme pressures and temperatures—at 3 classic Clovis culture archaeological sites.

---

Link :
https://www.futurity.org/cosmic-impact-classic-clovis-archaeological-sites-3298012/?utm_source=rss&utm_medium=rss&utm_campaign=cosmic-impact-classic-clovis-archaeological-sites-3298012