The boundary between the crust and the mantle is marked by a seismic-velocity discontinuity called ____________.
A) the Edsel
B) the Moho
C) Lyell's surface
D) the transition zone

Question

Quizplus · Accepted Answer

The seismic-velocity discontinuity that marks the boundary between the Earth's crust and mantle is commonly known as the Mohorovičić discontinuity, or the "Moho" for short. This boundary separates the relatively cool and brittle crust from the hotter and more ductile mantle beneath it.

The Boundary Between the Crust and the Mantle Is Marked