Metamorphic rock study guide

Described the two ways in which foliated metamorphic rock might form

- extreme pressure may cause minerals to realing or regrow - Minerals that have different compositions separate to provide a series of alternating dark and light bands

Describe two characteristics of nonfoliated metamorphic rock

- the original rock that is mormaphised ay contain grains of only one mineral or contains very small amounts of other minerals -the original rock may contain grains that are round or square

In what two ways are metamorphic rock classified

Chemical composition texture

Metamorphic rock form from which three types of rock?

Existing igneous Sedimentary metamorphic

Why are rocks that formed as a result of contact metamorphism often found near those formed by regional metamorphism?

Volcanism and the movement of magma often accompany tectonic activity

Hot fluids from magma can circulate through the rock and change the mineral ___________ by dissolving some minerals and adding others

composition

Where does most metamorphic rock form?

deep within earth's crust

The second type of metmorphism occurs when large areas of Earth's crust are affected by the heat and pressure caused by the movement and collisions of

earth's giant techtonic plates

the metamorphic rock texture in which mineral grains are arranged in planes and bands

foliation

a metamorphic rock that forms when intense heat and pressure underground cause the minerals in schist to separate into bands a the minerals recrystalize

gneiss

In addition to changed caused by heat from magma, what other occurrence changes in the surrounding rock during contact metamorphism

hot chemical fluids

One type of metamorphism occurs when small volumes of rock come in contact with ___________

magma

a metamorphic rock that forms from the compression of limestone

marble

The type of rock that forms because of ________ can indicate the conditions that were in place when the original rock changed

metamorphism

the metamorphic rock texture in which mineral grains are not arranged in planes or bands

nonfoliated

Describe the area of rock that is affected by contact metamorphism

only a small area of rock that surrounds the hot magma is changed by the magma's heat

Minerals may change in size or shape, or they may separate into _______________ that give rocks a layered appearance

parallel bands

Hot fluids, heat and ___________ cause some minerals to change into other minerals

pressure

a nonfoliated rock that forms when quartz sandstone is metamorphosed

quartzite

Which type of metamorphism causes most metamorphic rock to form

regional metamorphism

a coarse-grained rock that forms when large amounts of heat and pressure are exerted on slate

schist

a foliated rock that forms when pressure is exerted on the sedimentary rock shale

slate

describe what happens to mineral during tectonic activity

tectonic activity generates tremendous heat and pressure which causes chemical changes in the minerals of rock

Define metamorphosis

the process of which by which heat, pressure, or chemical processes change one type of rock to another

Define regional metamorphism

the type of metamorphism that occurs over a large area

Define contact metamorphism

when magma comes into contact with existing rock, heat from the magma can change the structure and mineral composition