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Questions and Answers
How are metamorphic rocks classified?
How are metamorphic rocks classified?
by the arrangement of their mineral crystals
Foliated metamorphic rocks are formed when existing rocks are placed under great heat and pressure.
Foliated metamorphic rocks are formed when existing rocks are placed under great heat and pressure.
True (A)
Where do foliated rocks tend to break?
Where do foliated rocks tend to break?
Along their mineral crystal bands
Unfoliated metamorphic rocks break in layers.
Unfoliated metamorphic rocks break in layers.
What is the texture of a metamorphic rock that has mineral crystals arranged in bands?
What is the texture of a metamorphic rock that has mineral crystals arranged in bands?
What is the texture of a metamorphic rock that does not have mineral crystals arranged in bands?
What is the texture of a metamorphic rock that does not have mineral crystals arranged in bands?
What is gneiss?
What is gneiss?
What is schist?
What is schist?
What are marble and quartzite?
What are marble and quartzite?
What is marble?
What is marble?
What is quartzite?
What is quartzite?
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Study Notes
Classification of Metamorphic Rocks
- Metamorphic rocks are classified based on the arrangement of their mineral crystals.
- Two primary textures exist: foliated and unfoliated.
Foliated Metamorphic Rocks
- Foliated rocks have mineral crystals aligned in bands.
- Formed under high heat and pressure conditions.
- They tend to break along their mineral crystal bands.
- Examples include:
- Gneiss: Created from shale and granite.
- Schist: Formed from shale, basalt, and mica.
Unfoliated Metamorphic Rocks
- Unfoliated rocks do not display a banded texture.
- They tend to break irregularly, not in layers.
- Examples include:
- Marble: Originates from heated limestone.
- Quartzite: Developed from heated sandstone.
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