Sienito De Monchique

Granite from Portugal


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Also known asCinzento Monchique, St. Louis.

Macroscopic descriptionMedium to coarse grained nepheline syenite with a greyish general colour from which reddish-brown grains of nepheline stand out.

Petrographic descriptionA holocrystalline, coarse grained igneous rock comprising predominantly alkali feldspars with laths of hornblende and biotite.

Sienito De Monchique
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