noun Geology a volcanic rock formed by the consolidation of material deposited by pyroclastic flows.
1930s: from L. ignis 'fire' + imber, imbr- 'shower of rain, storm cloud' + -ite1.

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  • Ignimbrite — is a volcanic pyroclastic rock, often of dacitic or rhyolitic composition. Ignimbrite is the deposit of a pumice rich pyroclastic density current, or pyroclastic flow , a hot suspension of particles and gases that flows rapidly from a volcano,… …   Wikipedia

  • ignimbrite — ● ignimbrite nom féminin (du latin imber, bris, pluie) Roche volcanique constituée de débris dacitiques à rhyolitiques soudés à chaud. (Elle résulte de l éruption explosive d un magma très visqueux et riche en gaz et présente un aspect hétérogène …   Encyclopédie Universelle

  • Ignimbrite — Bloc d ignimbrite Ignimbrite observée au microscope. Le verr …   Wikipédia en Français

  • ignimbrite — noun Etymology: German Ignimbrit, from Latin ignis + imbr (from imber rain) + German it 1 ite more at imbricate Date: 1932 a hard rock formed by solidification of chiefly fine deposits of volcanic ash …   New Collegiate Dictionary

  • ignimbrite — /ig nim bruyt /, n. Petrol. a fine grained volcanic rock consisting mainly of welded shards of feldspar and quartz. Also called welded tuff. [1932; < L ign(is) fire + imbr , s. of imber rain, shower + ITE1] * * *       rock composed of compacted… …   Universalium

  • ignimbrite — noun A deposit left by the pyroclastic flow from a volcano, consisting of ash, pumice lapilli, and lithic fragments …   Wiktionary

  • ignimbrite — i·gnim·brì·te s.f. TS petr. roccia eruttiva effusiva formatasi in seguito al consolidamento di materiale piroclastico vetroso fuoriuscito nel corso di un eruzione {{line}} {{/line}} DATA: sec. XX. ETIMO: der. di igni e del lat. imber pioggia con… …   Dizionario italiano

  • ignimbrite — n. thin grained volcanic rock mainly composed of welded fragments of quartz and feldspar …   English contemporary dictionary

  • ignimbrite — ALASKA VOLCANO OBSERVATORY GLOSSARY The rock formed by the widespread deposition and consolidation of ash flows and Nuees Ardentes. The term was originally applied only to densely welded deposits but now includes non welded deposits. GLOSSARY OF… …   Glossary of volcanic terms

  • ignimbrite — ig·nim·brite …   English syllables

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