It was first inferred from the arrival of a P_n head wave before the direct P_g wave in a 1909 earthquake.
It probably represents a transition from granulites to ultrabasic material. Material from this region can be seen in the most complete ophiolites. It was first inferred from the arrival of a P_n head wave before the direct P_g wave in a 1909 earthquake. It ranges in depth from about 5 to 70 kilometers, and is associated with a jump in seismic wave speeds relative to the overlying crust. FTP identify this boundary named for a Croatian scientist, the discontinuity between the crust and mantle.
It probably represents a transition from granulites to ultrabasic material.
the {Moho}rovicic discontinuity or boundary