The boundary between the crust and the mantle is marked by an abrupt change in seismic velocity called the
A) transition zone.
B) Moho.
C) low-velocity zone.
D) lithosphere.

Question

Quizplus · Accepted Answer

The boundary between the crust and the mantle is known as the Moho, which is marked by an abrupt change in seismic velocity. The Moho separates the relatively cool and brittle crust from the warmer and more ductile mantle.

The Boundary Between the Crust and the Mantle Is Marked