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For Nordmarka, Oslo, Norway
A variety of quartz-bearing alkali-feldspar-syenite composed mainly of microperthite with minor biotite, alkali amphibole or pyroxene.
Classification of NordmarkiteHide
Mineralogy of NordmarkiteHide
Essential minerals - these are minerals that are required within the classification of this rock:
|Feldspar > Alkali Feldspar > K Feldspar||Potassium-dominant feldspars with unknown crystal symmetry and Al-Si ordering state.|
|Feldspar > Plagioclase||A petrological term for Albite-Anorthite Series.|
|Pyroxene||A petrological term for Pyroxene Group.|
|Silica > Quartz||SiO2|