Pyroclastic products

The term pyroclast indicates any granule produced by volcanic activity during an explosive eruption. These are formed by the fragmentation of magma due to the explosion of the gas bubbles contained within it.
Pyroclasts are divided into:

  • Bombs: if they are greater than 6.4 cm in diameter
  • Lapilli: if they are between 0.2 and 6.4 cm in diameter
  • Ash: if they are smaller than 0.2 cm in diameter.