FTP, name this interface region that separates the crust from the mantle, an area named for its Croatian discoverer.
The location of this region is one of the primary refutations of the Vine-Matthews hypothesis.  It is believed to have a similar composition to the deeper Weichert-Gutenberg one, meaning that it consists primarily of peridotite that contains olivines as the most abundant minerals.  Postulated since certain seismic waves arrived at detecting stations sooner than expected, it is now known to lie at a depth of 35 kilometers on continents and 7 kilometers beneath the ocean.  FTP, name this interface region that separates the crust from the mantle, an area named for its Croatian discoverer.
The location of this region is one of the primary refutations of the Vine-Matthews hypothesis.  
Mohorovicic discontinuity or Moho discontinuity (NOT "Mohorovic")