Metamorphism

It takes place at approximately at 320 ºC–450 ºC and at moderate pressures.

• Low-grade metamorphism

• Intermediate metamorphism

• High-grade metamorphism

• Retograde metamorphism

When water molecules from minerals are usually squeezed out, forming “drier” rocks.

• Retograde metamorphism

• Prograde metamorphism

• Plastic deformation

• Burial Metamorphism

Tags

NGSS.HS-ESS2-5

In prograde metamorphism, it takes place when temperature and pressure _________.

13. Occurs when mineral grains soften and deform at high temperatures.

14. Occurs when two bodies of rock slide past each other along faults, where some rocks are heated and pulverized to form new rocks. Example of this is myolite.

Tags

NGSS.MS-ESS2-2

Which of the following is the main factor in the process of regional

metamorphism?

• air

• pressure

• temperature

• water

What happened to the temperature and pressure if the rocks are buried down deep?

• It increases

• It decreases

• It remains constant

• It is intermittently degrading

Tags

NGSS.HS-ESS2-3

Which of the following is the main factor of contact metamorphism

• heat and reactive fluids

• pressure

• water

• temperatute

Which of the following words is NOT associated with metamorphism?

• heat

• pressure

• mantle

• weathering

What is the effect of heat and pressure in rocks as there is an increase in depth?

• foliation surfaces shine

• low-grade metamorphism

• grain size becomes coarse

• increase in mineral alignment