Beneath which major geographic areas are the chemically distinct LLSVPs situated?
Answer
Africa and the Pacific Ocean
The Large Low-Shear-Velocity Provinces (LLSVPs) are massive, irregularly shaped regions identified deep within Earth's lower mantle that contrast chemically with the surrounding mantle material. Their location provides a potential physical map of the merger between Earth and Theia. The identification of two primary, large provinces—one situated beneath the African continent and another found beneath the Pacific Ocean—suggests these areas might contain the distinct, less-mixed remnants of the impactor's deep material, which sank but remained separate from the bulk of the planetary merger due to its different chemical properties.
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