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Porphyritic granite

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About Porphyritic graniteHide

A granite exhibiting porphyritic texture.


Classification of Porphyritic graniteHide

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 FeldsparFeldspar Group minerals rich in Potassium or Sodium.
Feldspar > PlagioclaseA petrological term for Albite-Anorthite Series.
Silica > QuartzSiO2

Internet Links for Porphyritic graniteHide

Mineral and/or Locality  
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