mohorovicic discontinuity: meaning, definition, pronunciation and examples
C2Technical/Scientific
Quick answer
What does “mohorovicic discontinuity” mean?
The sharp boundary between the Earth's crust and the mantle, marked by a sudden increase in seismic wave velocity.
Audio
Pronunciation
Definition
Meaning and Definition
The sharp boundary between the Earth's crust and the mantle, marked by a sudden increase in seismic wave velocity.
The seismological boundary layer that separates the lithospheric crust from the underlying asthenospheric mantle. Its depth varies between oceanic and continental regions and is a fundamental structural feature in geology and geophysics.
Dialectal Variation
British vs American Usage
Differences
Spelling: British English tends to retain the diacritic (č) more often in formal scientific writing, though it is frequently omitted. American English more commonly uses 'Mohorovicic' without the diacritic. Pronunciation of the 'č' as /tʃ/ is more consistently observed in British academic contexts.
Connotations
Identical technical meaning. No difference in conceptual or professional connotation.
Frequency
Extremely low frequency in both varieties, restricted to specialist literature. No significant difference in frequency of use.
Grammar
How to Use “mohorovicic discontinuity” in a Sentence
The Mohorovičić discontinuity lies [DEPTH]Seismic waves refract at the Mohorovičić discontinuity[Something] penetrates the Mohorovičić discontinuityVocabulary
Collocations
Examples
Examples of “mohorovicic discontinuity” in a Sentence
adjective
British English
- Moho-depth estimates
- Mohorovičić-discontinuity research
American English
- Moho depth estimates
- Mohorovicic discontinuity research
Usage
Meaning in Context
Business
Not used.
Academic
Used in geology, geophysics, and earth science papers, textbooks, and lectures. E.g., 'The study aimed to remap the Mohorovičić discontinuity beneath the continent.'
Everyday
Virtually never used. Would only appear in popular science documentaries or articles.
Technical
Core term in seismological surveys, plate tectonics, and planetary crust analysis. E.g., 'Drilling to the Moho is a major scientific ambition.'
Vocabulary
Synonyms of “mohorovicic discontinuity”
Strong
Neutral
Weak
Vocabulary
Antonyms of “mohorovicic discontinuity”
Watch out
Common Mistakes When Using “mohorovicic discontinuity”
- Misspelling: 'Mohorovitic', 'Mohorovicic' (missing the caron/hacek).
- Mispronunciation: /mɒˈhɔːrəvɪsɪk/.
- Using it as a general term for any geological boundary.
FAQ
Frequently Asked Questions
Because there is a discontinuous, abrupt change in the physical properties (especially seismic wave speed) of the rock at that boundary.
No, it is an inferred boundary detected indirectly through seismology, not a visible layer.
Not completely. The deepest boreholes, like the Kola Superdeep Borehole, have approached but not definitively reached the Moho under continents.
Similar crust-mantle boundaries are inferred to exist on other terrestrial planets and moons, though they are not specifically called by this name.
The sharp boundary between the Earth's crust and the mantle, marked by a sudden increase in seismic wave velocity.
Mohorovicic discontinuity is usually technical/scientific in register.
Mohorovicic discontinuity: in British English it is pronounced /ˌməʊhərəʊˈvɪtʃɪtʃ ˌdɪskɒntɪˈnjuːɪti/, and in American English it is pronounced /ˌmoʊhəroʊˈvɪtʃɪtʃ ˌdɪskɑːntɪˈnuːɪti/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
MOst HOrizon ROVes (like a rover) Into the Crust: MohoRoviCic. Think of a rover crossing the discontinuity from the crust down into the mantle.
Conceptual Metaphor
The Earth's skin meeting its flesh. A floor/ceiling or foundation/upper structure boundary.
Practice
Quiz
What does the Mohorovičić discontinuity primarily demarcate?