The massive flow of glassy black obsidian and gray pumice is one of Oregon's best volcanic attractions, both for the sheer awe it produces and its geological significance in the Pacific Northwest.

Obsidian originated from a geological formation known as the Trans-Mexican Volcanic Belt, spanning 621 miles (1,000 kilometers) from the west to east coasts in central Mexico, the study authors noted.

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 ...

Researchers capture the first footage of the glacial flow of rocky obsidian lava, still flowing months after an eruption ... Volcanic obsidian lava flows for a year. Published. 7 November 2013. Share.

Obsidian originated from a geological formation known as the Trans-Mexican Volcanic Belt, spanning 621 miles (1,000 kilometers) from the west to east coasts in central Mexico, the study authors noted.

Obsidian – a type of volcanic glass – can produce cutting edges many times finer than even the best steel scalpels. At 30 angstroms – a unit of measurement equal to one hundred millionth ...

An explosive volcanic eruption in Chile has given scientists the first direct insight into the strange motion of rocky lava known as obsidian flow. Rather than a red river of molten rock oozing ...

Obsidian – a type of volcanic glass – can produce cutting edges many times finer than even the best steel scalpels. At 30 angstroms – a unit of measurement equal to one hundred millionth ...

Researchers capture the first footage of the glacial flow of rocky obsidian lava, still flowing months after an eruption.