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Post by shawnturner on Jan 6, 2018 10:46:18 GMT
Hi, 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. Thank you, For More Reference: Blockchain Marketing
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