Porphyritic granite
A rock subtype
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About Porphyritic granite
Unique Identifiers
Mindat ID:
48147
Long-form identifier:
mindat:1:1:48147:8
GUID
(UUID V4):
(UUID V4):
e67903c8-7b4f-42ed-ae59-70bc214b869d
Classification of Porphyritic granite
Granite is in section 3 of the QAPF diagram.
Sub-divisions of Porphyritic granite
- Porphyritic granite
Mineralogy of Porphyritic granite
Essential minerals - these are minerals that are required within the classification of this rock:
Feldspar > Alkali Feldspar | A subgroup of the Feldspar Group, poor in calcium, and mostly rich in potassium. |
Feldspar > Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
Silica > Quartz | SiO2 |
Internet Links for Porphyritic granite
mindat.org URL:
https://www.mindat.org/min-48147.html
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References for Porphyritic granite
Reference List:
Brignogan-Plages, Plounéour-Brignogan-Plages, Brest, Finistère, Brittany, France