What is the Earth's mantle made of?

Answer

The earths mantle is made up of a rocky material composed of silicon, oxygen, magnesium, iron, aluminum, and calcium. The upper mantle is very rigid while the lower mantle flows very slowly.
Q&A Related to "What is the Earth's mantle made of?"
The earth's mantle is made of magma
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Hot dense ultramafic rock. Ultramfic is rock that is high in iron and magnesium and has almost no silica content. Source(s)
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Elements in the Mantle The mantle consists of many minerals (metals) and basic elements, which include iron, magnesium, aluminum, and silicon Inner Mantle The inner mantle begins
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Earth's mantle is a 2,900 km thick rocky shell
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