Exam 8: Metamorphism and Metamorphic Rocks

An example of a nonfoliated metamorphic rock is ____.

Foliation indicates that ____ during metamorphism

The accompanying figure represents the metamorphic grade of shale. Explain the figure in terms of changes in mineral assemblage with increasing metamorphism.

When an oceanic plate collides with a continental plate, what is the metamorphic result?

Gneiss is a high-grade metamorphic rock that is streaked or has segregated bands of light and dark minerals.

The rock type that is the source of most commercial asbestos is ____.

Because large intrusions, such as batholiths, have such a large surface area they cool quickly and only a relatively small area of surrounding rock undergoes metamorphism.

Heat involved in the metamorphic process may come from lava, ____________________ in the crust, or ____________________.

Regional metamorphism is confined to convergent plate margins.

Rocks undergo ____________________ , which means that the stress on a rock in Earth's crust is the same in all directions.

Two economically important metamorphic minerals are graphite and corundum, which can be used, respectively, for ____.

Migmatites can form in the deeper portions of the crust at convergent plate boundaries.

Two characteristics that have made asbestos and important industrial mineral are ____ and ____.

Initial temperature, the size of the intrusion, the fluid content of the magma, and the nature of the country rock are important factors in ____ metamorphism.

The Taj Mahal in India is constructed mostly of ____.

The changes that occur during metamorphosis of a rock can change its texture but will never form new minerals.

Divergent plate boundaries are characterized by ____.

When the locations of the first appearances of a particular index mineral are connected on a map, the result is a line of equal metamorphic intensity called a(n)____________________.

Many ore deposits, including copper, lead, iron, and zinc, are associated with ____________________ metamorphism.

What is a metamorphic facies? How is each facies named?