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Earth's core has the heaviest mineral materials of highest density. A zone of mixed heavy metals + silicates separates the core from outer layers. The mantle extends from Moho’s discontinuity (35 km) to a depth of 2,900 km (Moho-Discontinuity to the outer core). Magma originates in the lower part of the Earth’s crust and in the upper portion of the mantle.
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