1. What is the likely protolith of a gneiss that contains 45 % quartz, 45% feldspar, and 10% hornblende?
2. What is the likely protolith of a schist that contains 90% quartz, 5% feldspar, and 5% biotite?
3. Name 4 minerals that occur in metamorphosed ultramafic rocks?
4. What is the difference between a schist and a gneiss?
5. Describe in your own words what a quartz-sillimanite-biotite schist would look like.
6. What's the difference between metasomatism and isochemical metamorphism?