chapter 7 geology

he agents that cause metamorphism include all except which of the following?

time

Which property of a protolith may change during metamorphism?

grain size, grain shape, and mineralogy

Intrusion of granite into layers of sedimentary rock would cause

 

contact metamorphism

Collision of two continental plates would cause

regional metamorphism

The interaction of plates on opposite sides of a transform fault results in

dynamic metamorphism

Mineral assemblages generally become __________ the deeper in the Earth that metamorphism takes place.

denser

What does the term metamorphic grade refer to?

the degree to which a metamorphic rock’s protolith has changed

Metamorphic index minerals help geologists determine

the temperature and pressure conditions during metamorphism

Quartz is not a good index mineral because

it is stable over a very wide range of temperatures and pressures

Grain size generally increases with metamorphic intensity except in

dynamic metamorphism

Foliation and lineation are terms that describe

the orientation of minerals in metamorphic rocks

he absence of preferred orientation of minerals in a metamorphic rock may be due to which of the following

the lack of stress during metamorphism, the absence of platy minerals like mica, and the absence of rod-shaped minerals like amphibole

What does the assemblage of minerals in a metamorphic rock help to determine?

the chemical composition of a protolith, the temperature at which metamorphism took place, and the pressure at which metamorphism took place