the.com/mantle

Earth's slow-motion lava conveyor belt, dragging continents at the speed your fingernails grow.

thicknessSpans 2,900 km, 84% of Earth's volume
not lavaMostly solid rock that flows like putty
heritage swapAlso means inherited duty or authority
fireplace cousinMantel shelf borrows the same word root
diamond deliveryVolcanoes haul mantle gems to the surface
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