Porphyritic granite from Samothraki (Greece)

3D ModelNoAI

Locality: Samothraki, Greece

No.: -

Size: 24 x 12 x 12 cm

Type: Igneous intrusive (plutonic) rock

Description: Granites are very common plutonic rocks, phaneritic rocks, light-colored, consisting primarily of Quartz and Alkali-feldspar (may contain small content of plagioclase). May contain mafic minerals and/or accessory minerals. Porphyry refers to large phenocrysts that are enclosed in a fine-grained aphanitic matrix. It indicates that some crystals formed early in the magma, and had quite a long time to grow large before the magma was brought into the place where it finally cooled and crystallized.

Essential minerals: quartz, potassic feldspar (orthoclase, microcline), plagioclase, biotite, hornblende.

Accessory minerals: magnetite, ilmenite, apatite, titanite, zircon, etc.

Website: http://geology.uaic.ro/muzee/mineralogie/

Concept & 3D-modelling by Andrei Ionut APOPEI