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Definition: ignimbrite from The Macquarie Dictionary

a fine-grained rhyolitic tuff produced by eruptions of dense clouds of incandescent volcanic glass in a semi-molten or viscous state.

Plural: ignimbrites

Summary Article: ignimbrite
From Encyclopedia of Environmental Change

A deposit of a pyroclastic flow. Because of confusion in past use, the term is best restricted to deposits rich in pumice. Some of the largest single eruptive units known (>1,000 km3) are ignimbrites, associated with major explosive volcanic eruptions such as Santorini (1470 BC), Krakatau (AD 1883) and Mount St. Helens (AD 1980). Many ignimbrite deposits are preserved as extensive sheets of welded tuff.


  • Fedele, FG; Giaccio, B; Hajdas, I (2008) Timescales and cultural process at 40,000 BP in the light of the Campanian Ignimbrite eruption, western Eurasia. Journal of Human Evolution 55: 834-857.
  • Gravley, DM; Wilson, CJN; Leonard, GS; Cole, JW (2007) Double trouble: Paired ignimbrite eruptions and collateral subsidence in the Taupo Volcanic Zone, New Zealand. Geological Society of America Bulletin 119: 18-30.
  • Legros, F; Druitt, TH (2000) On the emplacement of ignimbrite in shallow-marine environments. Journal of Volcanology and Geothermal Research 95: 9-22.
John B. Hunt
University of Gloucestershire
© by SAGE Publications Ltd.

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