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The boundary between the earth's crust and mantle is the

  • A.Lehmann discontinuity
  • B.Conrad discontinuity
  • C.Mohorovicic discontinuity
  • D.Gutenberg discontinuity

Answer: C

Named for the seismologist who identified it from a change in wave velocity, the Moho lies at roughly 35 km under continents and much shallower under oceans. The Gutenberg discontinuity is the deeper mantle-core boundary.

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