Learning Geology

Where Does Metamorphism Occur?  So far, we've discussed the nature of changes that occur during metamorphism, the agents of metamorp...

Types of Metamorphic Rocks  Coming up with a way to classify and name the great variety of metamorphic rocks on Earth hasn't been eas...

What Is a Metamorphic Rock?  If someone were to put a rock on a table in front of you, how would you know that it is metamorphic? Fir...

Metamorphic rocks are formed by the heating of pre-existing rocks. The heat provide to a rock changes it mineralogical and physical changes ...