olivine pyroxene amphibole quartz
I gave my students this multiple choice question: In 1922 N. L. Bowen developed the concept of magmatic evolution which is also known as Bowen's Reaction Series. Applying the Bowen's Series principles, what mineral forms and crystallizes first in the region of highest temperature and pressure?

Only one answer is correct among these 4 choices:
- olivine
- pyroxene
- amphibole
- quartz

Could you tell me which one is correct?

olivine