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Metamorphic Rocks

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  • 1. I. FORMATION OF METAMORPHIC ROCKS:
  • 2.  
  • 3. A metamorphic rock is one whose original form has been __________ changed
  • 4. BY________ AND _____________ HEAT PRESSURE
  • 5. THIS ALTERATION IS CALLED _____________ RE -CRYSTALLIZATION
  • 6. These changes are NOT caused by MELTING
  • 7. If the rock melted and cooled it would be an _____________ IGNEOUS ROCK
  • 8. 1. Changes caused by _____________ RE - CRYSTALLIZATION (again)
  • 9. May include the creation and growth of ________________________ NEW MINERAL CRYSTALS
  • 10. 2. Rocks which are intensely __________ can also become ____________ rock Compressed metamorphic
  • 11.  
  • 12.  
  • 13. MAKING IT MORE DENSE AND RESISTANT TO WEATHERING
  • 14. The growth of new minerals may cause the rock to appear BANDED
  • 15. OR STRIPES OF LIGHT DARK MINERALS foliated
  • 16. pressure pressure pressure
  • 17. SCHIST SHOWS BANDING
  • 18.  
  • 19. It can also ____________ (BEND) OR ______________ ORIGINAL STRUCTURES DESTROY DISTORT
  • 20.  
  • 21.  
  • 22.  
  • 23. 3. There are two types of Metamorphism :
    • A.
    • B.
    Regional Contact
  • 24. A.Regional metamorphism: occurs over large areas with extreme pressures & temperatures
  • 25. Photograph of regional metamorphism New York State thruway
  • 26.  
  • 27. This extreme heat and pressure is what builds MOUNTAINS
  • 28. B. CONTACT METAMORPHISM
  • 29. IS THE _________ OF CONTACT WHERE AN IGNEOUS INTRUSION MEETS THE EXISTING ROCK BUT _____________ MELT IT ZONE DOES NOT
  • 30. IGNEOUS INTRUSION Contact metamorphism occurs only at the place where the magma contacts rock SANDSTONE LIMESTONE SANDSTONE SHALE
  • 31. Any kind of rock: IGNEOUS SEDIMENTARY METAMORPHIC
  • 32. CAN UNDERGO RE-CRYSTALLIZATION TO FORM METAMORPHIC ROCK.
  • 33. PARENT ROCK Is rock from which metamorphic rock is formed.
  • 34. Limestone metamorphoses to become _________________ marble
  • 35. Sandstone metamorphoses to become _________________ quartzite
  • 36. Shale metamorphoses to become _________________ slate
  • 37. We will not find fossils in Metamorphic rock because:
  • 38. The heat and pressure of metamorphism would have destroyed them
  • 39. TIME TO CHECK OUT THE REFERENCE TABLES TO LOOK AT HOW TO IDENTIFY METAMORPHIC ROCKS