the ash that falls as a deposit from the eruption of a volcano
there will be molten lava and ash and ashfall, which is the dust
Examples of 'ashfall' in a sentence
ashfall
Sakurajima, and therefore has much smaller amounts of ashfall.
Kenta Higuchi, Chihaya Koriyama, Suminori Akiba 2012, 'Increased Mortality of Respiratory Diseases, Including Lung Cancer, in the Area withLarge Amount of Ashfall from Mount Sakurajima Volcano', Journal of Environmental and Public Healthhttp://dx.doi.org/10.1155/2012/257831. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)