HW#18: Metamorphic Rocks

Instructions: Answer the questions below using one to five sentences.

13. Name three rocks that are produced by contact metamorphism.

14. What is the agent of hydrothermal metamorphism?

15. Which type of plate boundary is typically associated with regional metamorphism?

16. List the common metamorphic rocks generated by regional metamorphism.

17. How do geologists use index minerals?

18. Explain why migmatites are difficult to place into any one of the three basic rock groups.