Earth: Day Zero • Paper 137 of 512

Core–Mantle Boundary Observations

The core–mantle boundary represents one of the most important interfaces within the Earth system.

Many of the largest deep-Earth structures identified through mantle tomography occur near this boundary region.

Observation Categories

• velocity discontinuities;
• LLSVP boundaries;
• ultra-low velocity zones;
• large-scale structural organization.

Earth: Day Zero Relevance

Because of its depth and relative isolation from surface processes, the core–mantle boundary may preserve information unavailable elsewhere within the Earth system.