Phyllis Butler

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Plate Tectonics

• Phyllis Butler

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NOTES Isostasy Forces Pangaea

• ISOSTASY Theory less dense floats on more dense
• Crust is consist of continents and seafloor
• Continents made of less dense Granite seafloor
  is
• made of more dense Basalt
• Crust is lighter than the molten magma and floats
  on Mantle
• FORCES that give the energy to create plate
  movement
• Compression, Tension and Shear
• PANGAEA