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 ...

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.

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 ...

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 ...

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 ...

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 ...

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.

Now, researchers may have answered how these artifacts made of obsidian ended up so far away from their point of origin ... including arrowheads and spear tips, traveled nearly 750 miles from ...