What is the name of the boundary surface separating the Earth's crust from the underlying mantle, marked by a sharp increase in seismic wave velocities?

💡 Solution & Explanation

The Mohorovičić discontinuity serves as the boundary interface separating the Earth's crust from the underlying mantle, identified by a distinct acceleration in seismic wave speeds. The Gutenberg discontinuity separates the mantle from the outer core, while the Conrad discontinuity lies within the crust itself.