Porphyritic Granite (igneous rock)

3D ModelNoAI

Locality: Cherbourg, France

No.: 8042

Size: 9.7 x 8.1 x 3 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 (ferromagnesian minerals) and/or accessory minerals. Porphyry refers to large phenocrysts that are enclosed in a fine-grained aphanitic matrix.

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

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

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

Concept & 3D-modelling by Andrei Ionut APOPEI