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DACITE [1 record]

Record 1 2011-07-28

English

Subject field(s)
  • Petrography
DEF

A fine-grained extrusive rock resembling andesite but having a more sodic plagioclase and more quartz.

OBS

dacite: From the province of Dacia, Romania.

French

Domaine(s)
  • Pétrographie
DEF

Lave ayant la composition d'une diorite quartzifère à phénocristaux de quartz, de plagioclases zonés, de hornblende et biotite souvent altérés.

CONT

[...] les dacites [...] correspondants microlitiques de l'estérellite [...] sont des roches gris-clair dans lesquelles on distingue des phénocristaux de quartz automorphe, d'andésine, de biotite et de hornblende ou de pyroxène.

Spanish

Campo(s) temático(s)
  • Petrografía
DEF

Roca eruptiva gris o azulada, de composición semejante a la de la diorita cuarcífera (plagioclasa, cuarzo, mica negra, anfíboles). Presenta fenocristales inclusos en una pasta o masa vítrea.

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