In Oregon, there are large deposits in the Malheur National Forest near John Day, and in the Glass Buttes just southeast of the Newberry monument. But the Big Obsidian Flow stands out, smack in ...

Glass Buttes weren’t named Rock ... land according to “Roadside Geology of Oregon,” hence why there is such an abundance of it here. Beyond the obsidian strewn over the entire area, the ...

Perry Chocktoot, culture and heritage director for the Klamath Tribes, recalled a story of tribal members making the journey to Glass Butte. They would summit the 6,830-foot-high obsidian-rich ...

Terry Richard/The Oregonian Lava Butte Found ... One of Oregon's most unique volcanic attractions, the Big Obsidian Flow is a massive field of volcanic glass, formed when lava cooled without ...