Volcanic ash is a non-genetic term and refers to fine fragments of magmatic glass shards, magmatic crystals, and other rocks (lithic material) with a diameter below 2 mm (White and Houghton, 2006). Fundamentally, volcanic ash is an inevitable product of the fragmentation of magmas and volcanic rocks. volcaninc ash erupted explosively from a volcano is generally composed of a mixture of pumice/glass shards (essentially quenched magma), fragments of older rocks from the volcano, and variable proportions of crystals or crystal fragments of various silicates and other less abundant mineral types (Plumlee et al, 2014).