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What is the name of the boundary between crust and mantle?

Answer and explanation

Correct answer: Mohorovicic discontinuity

Direct answer: Option C is correct. The boundary between the crust and mantle is called the Mohorovicic discontinuity, commonly shortened to the Moho. A discontinuity is a zone where seismic-wave speed or other physical properties change noticeably. A is wrong because the Lehmann discontinuity is associated with the boundary between the inner and outer core. B is wrong because the Gutenberg discontinuity separates the mantle from the outer core. D is wrong because “Conrad” refers to a crustal boundary in some descriptions, while “Conrad core” is not the correct name for the crust–mantle boundary. C gives the full correct name. Memory cue: Moho = bottom of crust; Gutenberg = mantle–outer core; Lehmann = inner–outer core.

Related tags

MohoCrust MantleBoundary

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