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Understanding Metamorphic Rocks: Types and Formation

Learn about the formation of metamorphic rocks through contact and regional metamorphism, and the classification of rocks based on texture - foliated and nonfoliated. Discover the examples and processes involved in the transformation of rocks.

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Understanding Metamorphic Rocks: Types and Formation

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  1. 10.4 Metamorphic Rocks

  2. Remember… • Metamorphic rocks form from one of three ways • ______________ • ______________ • ______________

  3. Contact Metamorphism • Hot magma ________________ existing rock • The heat changes the _____________ of the surrounding rock • Only rocks __________ the magma are changed

  4. Contact metamorphism: granite (igneous – on top) and gneiss (metamorphic – on bottom

  5. Regional Metamorphism • Can occur over _______________ during tectonic activity • May occur when one _________ pushes against another

  6. Classifying Metamorphic Rock • According to texture • Two types: • ____________ • ____________

  7. Foliated Rocks • Extreme pressure may flatten the minerals out, __________________ • May also happen due to __________________

  8. Foliated Rocks • Examples: • ____: from shale • ____ • ____: from granite

  9. Nonfoliated Rocks • _______ have bands of crystals

  10. Nonfoliated Rocks • Examples: • _______: from sandstone • _______: from limestone

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