Pyroclastic density currents range from those generated by small collapses from unstable lava domes to huge landscape-modifying events generated by super-eruptions. Due to the awesome nature of these events and the inherent hazards they present to society, they have long been the subject of scientific intrigue, yet much about the mechanisms by which they are emplaced remains unresolved.

Within the literature, studies of ignimbrites have unfortunately been plagued by a plethora of confusing terminology, inconsistent classification schemes and conflicting models that can baffle the most committed readers. A detailed and clear text devoted to this subject is therefore not only...

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