Midterm rock compositions

Question 1

what is the composition of a rhyolite and granite

Answer 1

orthoclase (50%), quartz (20%), plagioclase (15%), muscovite, biotite, amphibole

Question 2

what is the composition of dacite and granodiorite

Answer 2

almost no orthoclase, quartz, plagioclase, muscovite, biotite, amphibole

Question 3

what is the composition of andesite and diorite

Answer 3

plagioclase (more Na rich), hint of muscovite, biotite, amphibole

Question 4

what is the composition of basalt and gabbro

Answer 4

plagioclase (more Ca rich), pyroxene

Question 5

what is the composition of komatiite and peridotite

Answer 5

pyroxene, olivine