HW#11: Igneous Rocks & Intrusive Activity

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

7. How does the rate of cooling influence crystal size? What other factors influence the texture of igneous rocks?

8. What does a porphyritic texture indicate about the cooling history of an igneous rock?

9. How are granite and rhyolite different? In what way are they similar?

10. Describe each of the following in terms of composition and texture: diorite, rhyolite, and basalt porphyry.

11. Explain the process of decompression melting.

12. Name two plate tectonic settings in which you would expect magma to be generated.