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  • 1. IGNEOUS ROCKS
  • 2. Where Does Igneous Rock Form?
  • 3. I. FORMATION OF IGNEOUS ROCKS
  • 4. A. Igneous rocks form directly from the _____________ and _____________ solidification crystallization
  • 5. of _____molten rock to form _______ rock solid liquid
  • 6. FOUNTAINING
  • 7. FISSURE ERUPTION
  • 8.  
  • 9. LAVA FLOW
  • 10.  
  • 11. LAVA FLOW OVER A ROAD
  • 12. LAVA FLOW THROUGH FORREST
  • 13. Kilauea, HI 2003
  • 14. Kilauea, HI , 2003
  • 15.  
  • 16. Mt. ST. Helens
  • 17. Volcanic crater
  • 18. crazy vulcanist
  • 19. SKY LIGHT
  • 20.  
  • 21.  
  • 22.  
  • 23.  
  • 24.  
  • 25.  
  • 26. B. _____________ is the process when a liquid rock cools, crystallization
  • 27. and it changes to a solid made of ________ ___________ INTERGROWN CRYSTALS
  • 28.  
  • 29. GRANITE MICROSCOPIC VIEW
  • 30. 2. CLASSIFICATION OF IGNEOUS ROCKS:
  • 31. A. 2 characteristics that are used to classify igneous rocks:
  • 32.
    • 1. ______________
    • 2. ______________
    texture mineral composition
  • 33.  
  • 34. B. Texture of an igneous rock describes the
  • 35. _________, __________ and ____________ of the mineral crystals it was made from. size shape arrangement
  • 36. C. The ______ of the crystals depends on the _______________________ size Rate of cooling
  • 37. Slow cooling = ____________ large crystals
  • 38.  
  • 39. MINERAL CRYSTALS
  • 40. GABBRO
  • 41. Fast cooling = ____________ fine crystals Or no crystals (glassy)
  • 42. GLASSY TEXTURE: OBSIDIAN
  • 43. BASALT: FINE CRYSTALS
  • 44. BASALT MICROSCOPIC VIEW
  • 45. Granite: Coarse crystals Basalt: Fine crystals (Microscopic views)
  • 46. FINE CRYSTAL: RYOLITE
  • 47. 3 . EXTRUSIVE IGNEOUS ROCKS:
    • A. _____________ occurs when molten (liquid) rock flows out of the earth as
    • ________________
    Extrusions lava
  • 48. lava magma
  • 49. And cools __________ quickly
  • 50.
    • to form
    • fine or no
    • ____________
    crystals
  • 51. gas pockets Vesicular basalt
  • 52. This rock if full of gas pockets frothy texture (vesicular)
  • 53.
    • B.
    • To form magma,
    • ____________
    • must be melted.
    minerals
  • 54.
    • C. Minerals melt
    • at different
    • ____________ and ___________
    temperatures pressures
  • 55.
    • D. Igneous rocks of different
    • ____________
    composition
  • 56.
    • Can form from the same body of ____________
    magma
  • 57. 4. INTRUSIVE IGNEOUS ROCKS :
    • A. _____________ occurs when molten
    • rock beneath the surface
    Intrusions (magma)
  • 58.
    • cools
    • ____________
    • to form
    • _____________
    slowly coarse crystals
  • 59. Granite: Coarse crystals Basalt: Fine crystals (Microscopic views)
  • 60.  
  • 61. 5. FELSIC
    • A. Igneous rocks of the continental crust are rich in
    • _________ density
    • _________ colored
    • minerals
    low light (granitic)
  • 62. 6. MAFIC
    • A. Igneous rocks of the ocean floor are rich in
    • _________ density
    • _________ colored
    • minerals
    high dark (basaltic)
  • 63.  
  • 64. Comparing Oceanic Crust To Continental Crust
  • 65.
    • Continental Crust:
    • 1.
    • 2.
    • 3.
    • 4.
    • 5.
    low density light color felsic granitic thick
  • 66.
    • Oceanic Crust :
    • 1.
    • 2.
    • 3.
    • 4.
    • 5.
    high density dark color mafic basaltic thin
  • 67. Complete the Activity
    • Use this diagram in your ESRT to answer the following:
    •  
    • What is the temperature for the interface between the following…
    • inner core and outer core? 6250° C
    • Outer core and stiffer mantle? 5000° C
    •  
    • Stiffer Mantle and athenosphere? 2600° C
    •  
    • Asthenosphere and lithosphere? 750° C
  • 68.
    • What is the depth of the interface between the stiffer mantle and the outer core? 2900 KM
    •  
    • State the relationship between depth and pressure :As depth increase pressure increases
    • State the relationship between depth and temperature:
    • As depth increases temperature increases
  • 69.  
  • 70. When rocks melt, bonds broken. Crystalline solid no longer exists. MELTING ROCKS AND CRYSTALLIZING MAGMA Rock magma magma rock
  • 71.
    • Hot liquid contains still solid fragments
    • Minerals melt at different temperatures
    • Melting causes changes in magma composition
    MELTING ROCKS AND CRYSTALLIZING MAGMA Rock magma magma rock
  • 72.
    • Cooling of hot liquid allows crystallization of minerals
    • Bonds are re-established
    • Crystalline structure grows until edges touch adjacent crystals
    • Minerals crystallize at different temperatures
    MELTING ROCKS AND CRYSTALLIZING MAGMA Rock magma magma rock
  • 73. OK……….. TAKE OUT YOUR REFERENCE TABLE
  • 74.