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Plate tectonic theory

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A2 GEOGRAPHY (EMMA) Mind Map on Plate tectonic theory, created by steph_narciso on 07/03/2014.
steph_narciso
Mind Map by steph_narciso, updated more than 1 year ago
steph_narciso
Created by steph_narciso about 11 years ago
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Resource summary

Plate tectonic theory
  1. structure
    1. inner core
      1. solid ball
        1. also iron and nickel
        2. density-13.6g/cm3
        3. outer core
          1. semi molten
            1. iron and nickel
            2. denisty-10-12g/cm3
            3. mantle
              1. solid and containing lower density material
                1. Peridotite-formed of silicate rocks
              2. crust
                1. Solid and divided into two main types
                  1. oceanic crust
                    1. 5-9km thick
                      1. 3.0g/cm3 dense
                        1. basalt
                          1. slilica and magnesium
                            1. sima
                          2. continental crust
                            1. 30-70km
                              1. 2.7g/cm3
                                1. granite
                                  1. silica and aluminuim
                                    1. sial
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