Show:
Metamorphic Rocks
Foliation
Vocabulary
100
The parent rocks are the original igneous, sedimentary, or metamorphic rocks before changes occur.
What are the parent rocks?
100
the arrangement of minerals in flat or wavy parallel bands
What is the definition of "foliation"?
100
the process in which an existing rock is changed by heat and/or pressure
What is the definition of "metamorphism"?
200
The two types are pressure and recrystallization(heat and pressure).
What are the two types of metamorphism?
200
Foliation develops when rocks are under pressure.
How does foliation develop?
200
the process in which a mineral's atomic bonds are broken and then rejoined in new ways
What is the definition of recrystallization?
300
changes happen when rocks are buried deeper in the crust, where pressure and temperature are increasing
When do the changes in rocks happen?
300
Marble is non-foliated and long-lasting.
Why is marble used as a decorative stone?
300
a rock that forms when magma cools within Earth
What is intrusive igneous rock?
400
pressure causes the minerals to flatten out in one direction
What does pressure cause in metamorphic rocks?
400
As temperature and pressure continue to increase.
When do the minerals separate into light and dark bands?
400
a rock that forms when lava cools on Earth's surface
What is extrusive igneous rock?
500
recrystallization causes individual minerals to grow larger or new minerals will form in place of older ones
What does recrystallization cause?
500
The rock may be composed of one type of mineral, or it wasn't formed under heat and pressure.
Why do some rocks not display foliation?
500
a naturally formed solid that is usually made up of one or more types of minerals
What is a rock?