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Above the core is Earth's mantle, which is made up of rock containing silicon, iron, magnesium, aluminum, oxygen and other minerals. The rocky surface layer of Earth, called the crust, is made up of mostly oxygen, silicon, aluminum, iron, calcium, sodium, potassium and magnesium.

Oxygen, silicon, aluminum, and iron are the four most abundant elements by volume in earth crust.

  • Oxygen is the most abundant element in the Earth’s crust by both mass and volume. The volume of oxygen is 46. 60%.
  • Silicon is the second most abundant element by volume. The volume of silicon is 27.72%.  
  • Aluminum is the third most abundant element by volume. The volume of aluminum is 8.13%
  • Iron is the fourth most abundant element by volume. The volume of iron is 5.00%.

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