Common igneous rocks

Question 1

Granite

Answer 1

Lots of orthoclase (pink), quartz, plagioclase, amphibole and biotite
Extrusive: rhyolite, light almost pinkish fine grain

Question 2

Granodiorite

Answer 2

More quartz than granite, not as much orthoclase, plagioclase, amphibole, some biotite
Extrusive: dacite, white grey colour fine grained

Question 3

Diorite

Answer 3

WHITE WITH BLACK: predominantly plagioclase with amphibole, tiny amounts of biotite and pyroxene
Extrusive: andesite, dark grey colour, fine grained

Question 4

Gabbro

Answer 4

BLACK WITH WHITE: predominantly pyroxene with plagioclase

Extrusive: basalt, dark black colour fine grained