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TUFF CONE [1 record]

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Record 1 2009-05-14

English

Subject field(s)
  • Vulcanology and Seismology
  • Geomorphology and Geomorphogeny
CONT

Tuff cones are a variety of pyroclastic cone formed by more energetic explosions involving groundwater that extensively fragment ejecta, producing finer-grained ash deposits; they typically have steeper slopes and wider craters than cinder cones.

OBS

tuff cone: Similar to a cinder cone except they are less common and are formed by explosions when magma comes into contact with water.

French

Domaine(s)
  • Volcanologie et sismologie
  • Géomorphologie et géomorphogénie
CONT

Des cônes de tuf (roche constituée de lave, de cendre et de boue) se dressent sur chacune des rives.

OBS

Les structures liées à l'activité phréatomagmatique sont essentiellement dépendantes du rapport eau/magma. Dans l'ordre croissant de ce rapport, on obtient : les cônes de scories [...] (interaction entre du magma et de très petites quantités d'eau extérieure); les anneaux de tuf [...] (rapport eau/magma entre 0,1 et 1); les cônes de tuf (interaction entre de l'eau superficielle); les dépôts de lave en coussin [...] (pas d'explosion car le volume d'eau et la profondeur sont trop grands) [...]

Spanish

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