Coherent Description of Earth's Inaccessible Interior Clarifies Mantle Motion

A new model of inner Earth pulls past information and hypotheses into a coherent story to clarify mantle motion. Scientists paint a story for a chemically complex inner earth, a model that sharply contrasts the heavily relied upon paradigm of the past few decades that the mantle is all one thing and well mixed. The original model was composed of simple concentric spheres representing the core, mantle and crust -- but the inner Earth isn't that simple.

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