Snowflake obsidian is a form of volcanic glass that features white or grayish “snowflake” shapes made of embedded cristobalite. These pretty patterns are not artificially added as a cheap ...

Northern California's Sáttítla Highlands are a testament to the region's volcanic past, with the landscape dramatically ...

Obsidian is a black volcanic glass; deposits found here were historically used by Indigenous peoples to craft tools. Over 80 plant species in the area have traditional uses in medicine ...

The ancient Greeks settled on the Aeolian Islands sometime in the Bronze Age where they traded with their neighbors ...

referring to the wealth of obsidian deposits in the area, which were formed by ancient lava flows. The dormant Medicine Lake Volcano sits in the middle of the monument and stretches over an area ...