What Volcanic Ash Really Is

The word ash suggests something soft and powdery, the gray remains of paper or wood after a fire. Inside this episode: - Ash Is A Size Category - How Magma Becomes Particles - Water Can Shatter Rock Too - A Grain Under The Microscope - The Column Rises Sources include the references linked below. Sources and further reading: - [U.S. Geological Survey, Volcanic Ash](https://volcanoes.usgs.gov/volcanic_ash/ash.html) This episode explains general earth science and is not current volcano, hazard, evacuation, or emergency guidance. Follow local authorities and official observatories for present conditions. Follow Volcanoes Explained for another clear journey through how Earth builds and erupts.