Horton, the archaeologist for Yellowstone, as she displayed obsidian knives and spear points from the park’s archives. “How did they interact with this landscape? Where did people go to visit?

The Lake County Sheriff's Office says that shortly after an August training one of its deputies located a suspect with a satchel full of spear points, serrated hand tools and obsidian flakes.

Their research focused mainly on the three sites for which they had information on climate, soil chemistry and land use trends as determined by an analysis of obsidian spear points. The team used ...

That has helped artifact looters searching for obsidian spear points and other artifacts. “Drought brings the water down. Much of the lake (normally) hides cultural sites and villages,” said ...

They are the Clovis caches, groupings of exquisitely carved spear points and/or other flaked ... long and nearly one and a half pounds, this obsidian piece is the largest artifact in the Fenn ...

At each one, they measured how much water had penetrated the surface of obsidian spear points, which told them how long the obsidian had been exposed and thus how old the spear points were.

Scattered across the island are thousands of small, sharp objects carved from obsidian, a rock made of ... Rapanui language as mata'a, were spear points — they were referred to as spears by ...

Their research focused mainly on the three sites for which they had information on climate, soil chemistry and land use trends as determined by an analysis of obsidian spear points. The team used ...

They are the Clovis caches, groupings of exquisitely carved spear points and other flaked ... analysis to get a rough idea of when two obsidian points in the cache were created.