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A syenite containing alkali amphibole or pyroxene.
Classification of Peralkaline syeniteHide
Sub-divisions of Peralkaline syeniteHide
Mineralogy of Peralkaline syeniteHide
Essential minerals - these are minerals that are required within the classification of this rock:
Non-essential minerals - these minerals are common, sometimes major components, but are not always present:
Late Cretaceous : 87.1 Ma to 78.7 Ma - based on mindat.org data.