Pyroclastics (literally "Fire Rock") are debris thrown from volcanoes during an eruption. It consists of new magma that has risen to the surface or older volcanic material that has remelted and has been expelled into the air by the explosion.

A Pyroclastics eruption entails spitting or "fountaining" lava, where the lava will be thrown into the air along with ash, Pyroclastics materials, and other volcanic byproducts.

Sources

• Image from www.obscure.ch/images/ covers/volcano.jpg