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Chapter 4 Section 3 METAMORPHIC ROCKS

Chapter 4 Section 3 METAMORPHIC ROCKS. You will learn:. Describe the conditions in Earth that cause metamorphic rocks to form Classify metamorphic rocks as foliated or nonfoliated. Vocabulary. metamorphic rock foliated nonfoliated. It is important because.

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Chapter 4 Section 3 METAMORPHIC ROCKS

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  1. Chapter 4 Section 3METAMORPHIC ROCKS

  2. You will learn: • Describe the conditions in Earth that cause metamorphic rocks to form • Classify metamorphic rocks as foliated or nonfoliated

  3. Vocabulary • metamorphic rock • foliated • nonfoliated

  4. It is important because... • metamorphic rocks are useful because of their unique properties.

  5. I. Formation of Metamorphic Rocks

  6. a. Metamorphic Rocks • Can form from igneous, sedimentary, or other metamorphic rocks • The form of the rock and/or the composition of the rock can change

  7. Heat and Pressure • Adding heat and pressure can change a rock from it’s parent rock to a new rock. • For example: • shale to slate to phyllite to schist to gneiss • Basalt to schist • Granite to gneiss

  8. Slate to Phyllite to Schist to Gneiss

  9. Hot Fluids • Water with dissolved elements reacts with minerals in rocks and change the compositions. • Mostly water and carbon dioxide

  10. II. Classifying Metamorphic Rocks

  11. a. Foliated • Foliated rocks form when mineral grains flatten and line up in parallel lines • Example: slate and gneiss

  12. Nonfoliated • No layering occurs and mineral grains do not line up • Example: marble, quartzite

  13. Ticket Out the Door • How are metamorphic rocks formed? • What is a “parent rock”? • How are metamorphic rocks classified? • What role do fluids play in rock metamorphism? • Why is marble used for sculptures?

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