Exam 7: Metamorphism and Metamorphic Rocks

Metamorphism is a physical and chemical change that occurs in such a way that:

Metamorphic rocks are commonly divided into these two groups, based on their textures: ____________________ and ____________________.

Which of the following correctly lists metamorphic mineral assemblages in order of decreasing temperature/pressure of formation?

If metamorphic rock contains biotite, garnet, and staurolite, it is ____________________ grade.

The three types of metamorphism are ____________________, ____________________, and ____________________.

Describe regional metamorphism. Where does it take place?

What are the sources of the heat, pressure, and fluids that cause rocks to metamorphose?

Describe nonfoliated metamorphic rocks. What is their appearance? Describe the two types of nonfoliated metamorphic rocks.

How do metamorphic processes form ore deposits? What are some of the ores that are formed?

Why is time important to metamorphic processes?

Is it always possible to identify the parent rock when looking at a metamorphic rock? Why or why not?

The type of metamorphism that typically produces the hard, dense, fine-grained rocks called mylonites is called ____________________.

How are metamorphic facies defined or recognized?

The temperature of the intrusive magma has little effect on the metamorphic minerals formed.

The index minerals that form in a metamorphic rock depend on the composition of the parent rock affected.

The region between two adjacent isograds makes up a single metamorphic facies.

What are the three types of pressures in the metamorphic process?

How can fluid activity promote metamorphism?

What does increasing grade of metamorphism mean in terms of the conditions that produced a sequence of metamorphic rocks?

If a rock is exposed to such high temperatures that it melts, it forms a(n) ____________________ and becomes a(n) ____________________ rock.