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Size of volcanic ash
08 Feb 2011 | Contributor(s):: William I Rose
Size of ash particles is discussed--ash, lapilli, fine and very fine ash, phi sizes, lognormal distributions and bimodal ones. Patterns of fallout and grain size distributions.
Origin of volcanic ash: Mechanisms for formation
Mechanisms for the formation of volcanic ash are reviewed and discussed, including explosive vesiculation, phreatomagmatic explosions and milling/comminution.