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Porphyritic granite

A rock subtype
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08958210017271952556151.jpg
Porphyritic granite

Brignogan-Plages, Plounéour-Brignogan-Plages, Brest, Finistère, Brittany, France
07692840017271952562479.jpg
Luxulianite

Luxulyan, Cornwall, England, UK
04354410017271952578528.jpg
Luxulianite

Luxulyan, Cornwall, England, UK
08958210017271952556151.jpg
Porphyritic granite

Brignogan-Plages, Plounéour-Brignogan-Plages, Brest, Finistère, Brittany, France
07692840017271952562479.jpg
Luxulianite

Luxulyan, Cornwall, England, UK
04354410017271952578528.jpg
Luxulianite

Luxulyan, Cornwall, England, UK
08958210017271952556151.jpg
Porphyritic granite

Brignogan-Plages, Plounéour-Brignogan-Plages, Brest, Finistère, Brittany, France
07692840017271952562479.jpg
Luxulianite

Luxulyan, Cornwall, England, UK
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About Porphyritic graniteHide

A granite exhibiting porphyritic texture.


Unique IdentifiersHide

Mindat ID:
48147
Long-form identifier:
mindat:1:1:48147:8

Classification of Porphyritic graniteHide

QAPF_P_3.png

Granite is in section 3 of the QAPF diagram.

Sub-divisions of Porphyritic graniteHide

Mineralogy of Porphyritic graniteHide

Essential minerals - these are minerals that are required within the classification of this rock:
Feldspar > Alkali FeldsparA subgroup of the Feldspar Group, poor in calcium, and mostly rich in potassium.
Feldspar > Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Silica > QuartzSiO2

Internet Links for Porphyritic graniteHide

References for Porphyritic graniteHide

Reference List:
Quick NavTopAbout Porphyritic graniteUnique IdentifiersClassification Sub-divisions Mineralogy Internet Links References
 
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