Amaze Lab Yet Another Layer! Geophysicists Discover New Layer in Earth’s Composition Posted: February 26, 2025 | Last updated: March 19, 2025 Underneath the Earth’s crust we know there is a ...

They believe the D" layer may be a unique composition leftover from this colossal impact, potentially holding clues to Earth's formation. The paper is published in the journal National Science Review.

Researchers had long suspected the Earth had another layer at its core, but because its composition is so similar to the layer surrounding it, the innermost inner core was hard to spot.

Whether convection in the Earth's mantle extends through its entire ... tended to support whole-mantle convection. The potential compositional boundary was typically put at 660 km depth ...