Since it's born out of molten rock, obsidian is only found in volcanic regions of the world, including in parts of the United States, such as the Mountain West, Southwest, California, Oregon ...

For the ancestral peoples of the Pacific Coast, obsidian (volcanic glass) was a highly valued raw material because it could be used to make razor-sharp cutting tools. However, for many parts of the ...

“Adjacent to this open-air workshop, just up above it on the hillside, was a beautiful rock shelter. . . . I just had a gut feeling that it was the kind [of site] I had been looking for.” A decade ...