In the heart of Oregon’s high desert, just south of Bend, lies a vast volcanic landscape that whispers tales of fire and ...

Volcanic glass has been discovered at more than 500 archaeological sites in western Canada. Geologically-speaking, it shouldn ...

Hand-carved arrowheads and jagged spears made of obsidian, a sharp rock formed by volcanic magma, are remnants of vast prehistoric trade networks that once cut across western North America.

The obsidian artifacts were traced back to four primary regions, including one in Idaho, one in Wyoming, and two in British Columbia, experts said. Photo by Todd Kristensen Volcanic glass has been ...