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Metamorphic Rocks

Contact Metamorphism - Metamorphic rocks triggered by heat from nearby magma.

Metamorphic Vocabulary

Metamorphic "Laws"

1. Metamorphic rocks have been altered from pre-existing rocks.

2. They can be changed physically (bent, twisted, deformed).

3. They can also be changed chemically (minerals change - think fossils).

4. High pressure, intense heat and water are needed for change.

5. Thicker layers = more intense change.

Thinner layers = less intense change.

Regional Metamorphism - Metamorphic rocks triggered by pressure from large parts of the crust crushing together.

Foliated - Metamorphic rocks with layers

Nonfoliated - Metamorphic rocks without layers

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