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PORPHYROBLASTIC [4 records]

Record 1 2012-05-31

English

Subject field(s)
  • Petrography
DEF

A blastoporphyritic, or sometimes porphyroblastic, metamorphic rock of igneous origin.

French

Domaine(s)
  • Pétrographie
DEF

Roche métamorphique montrant des amygdales quartzo-feldspathiques, plus ou moins cataclastiques, prises dans une matrice schisteuse.

Spanish

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Record 2 2011-07-25

English

Subject field(s)
  • Petrography
  • Mineralogy
DEF

Pertaining to the texture of a recrystallized metamorphic rock having large ideoblasts of minerals possessing high form energy (e.g. garnet, andalusite) in a finer-grained crystalloblastic matrix.

OBS

Not to be confused with "blastoporphyritic."

French

Domaine(s)
  • Pétrographie
  • Minéralogie
DEF

Décrit une roche métamorphique dont la texture présente des mégacristaux (porphyroblastes) dans une matrice aux cristaux plus fins (cristalloblastes).

Spanish

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Record 3 1998-03-12

English

Subject field(s)
  • Petrography
DEF

Said of a relict texture in a metamorphic rock in which traces of an original porphyritic texture remain.

OBS

Not to be confused with "porphyroblastic. "

French

Domaine(s)
  • Pétrographie

Spanish

Save record 3

Record 4 1997-10-07

English

Subject field(s)
  • Petrography
OBS

porphyroid(adj.) : Said of or pertaining to... a blastoporphyritic of sometimes porphyroblastic metamorphic rock of igneous origin....

French

Domaine(s)
  • Pétrographie
CONT

Il existe de nombreuses variétés de gneiss : [...] "Gneiss porphyroïde" : à gros cristaux de quartz ou de feldspath.

Spanish

Save record 4

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