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The heavier silicates named as 'Sima' or silica + magnesium are most abundant in the

  • A.Crust
  • B.Core
  • C.Mantle
  • D.Ocean floors

Answer: D

Sima - silica plus magnesium - is the denser silicate material that makes up oceanic crust, so it is most abundant beneath the ocean floors. The lighter sial, silica plus aluminium, forms the continents.

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