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What is the lower mantel of the world made of?

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it's made of rock, it's the mesosphere and it makes up the earth. it consists of aluminum, silicon, magnesium, calcium, and oxygen..
:)
User Ikryvorotenko
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The lower mantle is composed of magnesium, iron-bearing silicates, olvine, and pyroxene.
User Ignacioricci
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