Stones do not float in water. This is a truism. But there is hardly a rule without exception. In fact, some volcanic eruptions produce a very porous type of rock with a density so low that it does ...

The park's 37.5-acre diamond search area is composed of three types of volcanic rocks-black lamproite, ... these stones make excellent mementos of your trip into a diamond-bearing volcanic crater.

(CNN) — Hundreds of unusual discs unearthed in Denmark are revealing clues into how a Stone Age population responded to a devastating volcanic eruption nearly 5,000 years ago, a new ...

A metate is a grinding stone common to Mesoamerican cultures, past and present. Corn and other grains are ground against the volcanic stone with another stone held in the hand called a manos.

The small town of Escolásticas, built on ancient volcanic stone, carves a ragged path through a high desert hillside in Central Mexico. Three hours northwest of Mexico City, this community of ...

A pilot program in Iceland that injected carbon dioxide into basaltic lava rocks turned more than 95 percent of the greenhouse gas into stone within two years.

An active supervolcano in Yellowstone National Park sits above a massive magma reserve. Following is a transcript of the video. There's a massive volcano at Yellowstone National Park. Its eruption ...

Volcano 'libraries' could help plan for future volcanic crises. ScienceDaily . Retrieved June 2, 2025 from www.sciencedaily.com / releases / 2018 / 05 / 180524112319.htm ...