Pyroclastic fall
Deposit of material ejected from a volcanic eruption / From Wikipedia, the free encyclopedia
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A pyroclastic fall deposit is a uniform deposit of material which has been ejected from a volcanic eruption or plume such as an ash fall or tuff.[1] Pyroclastic fallout deposits are a result of:
- Ballistic transport of ejecta such as volcanic blocks, volcanic bombs and lapilli from volcanic explosions
- Deposition of material from convective clouds associated with pyroclastic flows such as coignimbrite falls
- Ejecta carried in gas streaming from a vent. The material under the action of gravity will settle out from an eruption plume or eruption column
- Ejecta settling from an eruptive plume or eruption column that is displaced laterally by wind currents and is dispersed over great distances