Cross-section of the Earth's interior: crust, upper- and lower-mantle, and outer- and inner-cores. Journalists may use this image only with appropriate credit.

The researchers used seismic waves to examine the types of rock beneath the seafloor and create a digital cross-section of Earth's crust and mantle. The team published its findings Sept.

The Earth has a layered structure made up of the core, the mantle and the crust. Different elements are present in different parts of the Earth’s structure. The crust is made from enormous ...