Geological process
The separation of a planetary body into layers of contrasting composition, dense metal sinking inward and lighter silicate rising, producing Earth’s core, mantle and crust.
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Differentiation left the Earth with three main compositional layers — crust, mantle and core — the core being metallic and nearly twice as dense as the stony mantle above it.
Evidence support: Supported by the cited evidence one source
Evidence: Kious 1996 Primary authority
Record last updated 2026-09-06. Corrections follow the published corrections policy; superseded claims are retained, never silently edited.