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PORPHYRO-APHANITIC [1 record]
Record 1 - internal organization data 2011-08-19
Record 1, English
Record 1, Subject field(s)
- Petrography
Record 1, Main entry term, English
- porphyritic-aphanitic
1, record 1, English, porphyritic%2Daphanitic
correct
Record 1, Abbreviations, English
Record 1, Synonyms, English
- porphyro-aphanitic 2, record 1, English, porphyro%2Daphanitic
correct
Record 1, Textual support, English
Record number: 1, Textual support number: 1 DEF
Said of the texture of a porphyritic igneous rock (or of a rock with such a texture) having large megascopic phenocrysts in an aphanitic groundmass. 3, record 1, English, - porphyritic%2Daphanitic
Record number: 1, Textual support number: 1 CONT
A porphyritic-aphanitic texture is defined as a rock having an aphanitic groundmass, or matrix, in which embedded phenocrysts make up more than 10% of the total rock volume. The phenocrysts are visible to the unaided eye. 1, record 1, English, - porphyritic%2Daphanitic
Record number: 1, Textual support number: 1 OBS
Porphyritic - This term applies to an igneous rock in which larger grains (phenocrysts) are embedded in a matrix of distinctly smaller grains (groundmass) which are either phaneritic or aphanitic: porphyro-phaneritic [if] both the large phenocrysts as well as the smaller crystals in the groundmass are large enough to see without magnification; porphyro-aphanitic if the phenocrysts are large enough to see but the groundmass is microcrystalline. 4, record 1, English, - porphyritic%2Daphanitic
Record 1, French
Record 1, Domaine(s)
- Pétrographie
Record 1, Main entry term, French
- porphyrique et aphanitique
1, record 1, French, porphyrique%20et%20aphanitique
correct
Record 1, Abbreviations, French
Record 1, Synonyms, French
- porphyro-aphanitique 2, record 1, French, porphyro%2Daphanitique
proposal
Record 1, Textual support, French
Record number: 1, Textual support number: 1 CONT
Dykes porphyriques et aphanitiques. 1, record 1, French, - porphyrique%20et%20aphanitique
Record number: 1, Textual support number: 1 OBS
Si aucun minéral n'est visible, on parle de texture vitreuse aphanitique. Si quelques minéraux présents sont de plus grosse taille, on parle de texture vitreuse porphyrique. 3, record 1, French, - porphyrique%20et%20aphanitique
Record 1, Spanish
Record 1, Textual support, Spanish
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