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Story summary
- Scientists from Utrecht University identified two Large Low Seismic Velocity Provinces (LLSVPs) in Earth's mantle beneath Africa and the Pacific Ocean.
- The LLSVPs are hotter and older than previously thought, dating back over 500 million years.
- The findings challenge the idea of a well-mixed mantle and reveal stable structures that influence volcanism.
- The LLSVPs do not significantly dampen seismic waves.
- Surrounding cold slab graveyards dampen seismic waves.
