Lithosphere

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The Earth's Lithosphere
Chapter 21

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Lithosphere

  1. 1.  1. CRUST 2. MANTLE 3. CORE – INNER AND OUTER CORE
  2. 2.  Thin outermost layer of the earth Made up of 2 layers of rocks found in the continental crust: the top layer called GRANITE LAYER and the bottom layer called BASALT LAYER. Mohorovicic Discontinuity- (moho/M.discontinuity)- boundary bet. The crust and mantle
  3. 3.  Layer below the crust Thicker and denser Mostly made up of dense rocks and is extremely hot Guttenburg Discontinuity- boundary bet. Mantle and core
  4. 4.  Made up of liquid iron and nickel Temperature ranges from about 2200 0C – 2400 0C
  5. 5.  Solid, innermost layer of the earth Temperature reaches to about 2500 0C Presence of dense iron may help explain the existence of the magnetic field around the earth
  6. 6.  1. MINERALS 2. ROCKS 3. METALS 4. FOSSIL FUEL
  7. 7.  Naturally occurring inorganic crystalline solid with a definite chemical composition Nonrenewable resources Some are considered precious gem
  8. 8.  Cooled from molten lava or magma. Ex.
  9. 9.  Formed from sediments deposited on the ocean bottom.
  10. 10.  Formed from sedimentary and igneous rocks that were subjected to high pressure and temperature. Weathering – breaking down of rocks
  11. 11.  Diastrophism - movement of the solid part of the earth FAULT – a crack or fracture in the crust of the earth FOLDS – are bends in rock layers Mountains are formed due to the upward movement of molten rocks eventually form as volcanoes.
  12. 12.  Alfred wegener – introduced the idea of Pangea as super continent

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