Metamorphic rocks

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Metamorphic rocks

  1. 1. Meta=change Morphic=form/shap e
  2. 2. I. Parent Rocks Rocks that have been changed from an original “parent” rock
  3. 3. II. How are Metamorphic Rocks Formed?  Formed under tremendous heat, great pressure, and chemical reactions  Can make new minerals  Most are found on or near plate boundaries  Metamorphism is changing one type of rock into another as a result of heat(from mantle), Pressure (from layers above) and/or chemical reactions.
  4. 4. III. Where does the Heat Come From? The heat comes from: 1. Mantle 2. Pressure of the layers 3. Movement of the Plates on Earth
  5. 5. IV. What does Metamorphism change?  Metamorphic rocks can change: 1. a rocks appearance, texture 2. crystal structure 3. mineral content  It can form from a/an: 1. Igneous 2. Sedimentary 3. Another metamorphic rock!
  6. 6. a. Foliated – mineral crystals are arranged in parallel layers or bands Examples: Schist, slate, and gneiss b. Nonfoliated – rocks are not banded and do not break into layers Examples: Marble and quartizite V. Types of Metamorphic Rocks
  7. 7. Foliated
  8. 8. Non-foliated NON-Foliated
  9. 9. VI. Contact vs. Regional Metamorphism Contact Small Area Regional Large Area
  10. 10. Used in construction of buildings and walkways Used in tables, floors, and roofing
  11. 11. Metamorphic Rock http://www.youtube.co m/watch?v=UrimDbT Ualg
  12. 12. Tier 1 Metamorphic Picture  1 picture of foliated  1 picture of non- foliated  Must have correct rock names  Must be presented in an organized/colorful way Chart  Complete chart  Must do research  DOES NOT have to be colorful

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