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Question: 1 regional metamorphism is caused by what change in a...

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1. Regional metamorphism is caused by what change in a rock's environment

Increase in temperature and pressure

Decrease in temperature and pressure

Increase in temperature and decrease in pressure

Decrease in temperature and increase in pressure

2. True or false: A change in temperature without any change in pressure may be sufficient to produce metamorphism

True

False

3. Metamorphism cause which of the following changes in a rock's bulk chemistry?

Old elements leave the system and new elements enter the system

All of the old elements remain in the system

All of the old elements except those forming volatile compounds remain in the system

The metamorphic rock becomes depleted in iron and magnesium

4. With respect to minerals in the protolith, minerals in a metamorphic rock are generally

More dense and of smaller grain size

More dense and of larger grain size

Less dense and of larger grain size

Less dense and of smaller grain size

5. Of the following, which mineral is found exclusively in metamorphic rocks?

Muscovite

Quartz

Potassium feldspar

Sillimanite

6. T/F: In all cases of metamorphism, the minerals in the metamorphic product are different from those in the protolith

True

False

7. Migmatites are metamorphic rocks which

Have crystallized from granitic magma

Have recrystallized in the solid state from granitic protoliths

Have undergone a small degree of melting in parts of the rock having granitic composition

Are mixtures of sedimentary and igneous rocks

8. Which of the following statements is true?

Deformation only takes place under conditons of high temperature and pressure

Deformation is common in rocks that have experienced contact metamorphism

Only metamorphic rocks which have platy or prismatic minerals may be deformed

Many metamorphic rocks are deformed but not all deformed rocks are metamorphic

9. The rock cycle illustrates the concept that

All three rock types are fundamentally the same

All three rock types are fundamentally different

Given time and the appropriate processes, any rock type may be regenerated as any other rock type

Igneous rocks are formed from magma

10. In order for a metamorphic rock to become foliated, which of the following is a necessary condition?

The protolith contains blocky or equant minerals

The protolith contains platy or prismatic minerals

Minerals in the protolith dissolve at points of contact and reprecipitate in lower pressure areas away from points of contact

The protolith contains garnets

11. Which of the following lists of metamorphic rock is arranged in increasing order of temperature?

Slate, gneiss, phyllite, schist

Slate, phyllite, gneiss, schist

Slate, phyllite, schist, gneiss

Shale, phyllite, schist, gneiss

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