Explain Pyroclastic Flow
Pyroclastic Flow Technical Terms
Pyroclastic Flow: A fast density current of pyroclastic material, usually very hot, composed of a mixture of gasses and a variety of pyroclastic particles (ash, pumice, scoria, lava fragments, etc.); produced by the explosive disintegration of viscous lava in a volcanic crater or by the explosive emission of gas-charged ash from a fissure and which tends to follow topographic lows (e.g. valleys) as it moves; used in a more general sense than ash flow. Compare –pyroclastic surge, ash flow, nueé ardente, lahar. SW, SN, GG