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Porphyritic granite

A rock subtype
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07627050015148159095516.jpg
Porphyritic granite

Brignogan-Plages, Plounéour-Brignogan-Plages, Brest, Finistère, Brittany, France
01906700015148153591740.jpg
Porphyritic granite

Bilou beach, Terre du Pont, Brignogan-Plages, Plounéour-Brignogan-Plages, Brest, Finistère, Brittany, France
06673720015832577217342.jpg
Luxulianite

Luxulyan, Cornwall, England, UK
07627050015148159095516.jpg
Porphyritic granite

Brignogan-Plages, Plounéour-Brignogan-Plages, Brest, Finistère, Brittany, France
01906700015148153591740.jpg
Porphyritic granite

Bilou beach, Terre du Pont, Brignogan-Plages, Plounéour-Brignogan-Plages, Brest, Finistère, Brittany, France
06673720015832577217342.jpg
Luxulianite

Luxulyan, Cornwall, England, UK
07627050015148159095516.jpg
Porphyritic granite

Brignogan-Plages, Plounéour-Brignogan-Plages, Brest, Finistère, Brittany, France
01906700015148153591740.jpg
Porphyritic granite

Bilou beach, Terre du Pont, Brignogan-Plages, Plounéour-Brignogan-Plages, Brest, Finistère, Brittany, France
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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
GUID
(UUID V4):
e67903c8-7b4f-42ed-ae59-70bc214b869d

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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