TERMIUM Plus®

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MOHOROVICIC DISCONTINUITY [4 records]

Record 1 2012-05-08

English

Subject field(s)
  • Geological Research and Exploration
  • Geophysics
CONT

Project Mohole was an attempt to retrieve a sample of material from the Earth's mantle by drilling a hole through the Earth's crust to the Mohorovicic Discontinuity.

French

Domaine(s)
  • Recherches et prospections géologiques
  • Géophysique
OBS

Un programme [...] qui [...] avait été projeté par les Russes et les Américains. Ces derniers ont baptisé leur projet Mohole, de hole = trou et Mohorovicic, surface de discontinuité qu'ils se proposent d'atteindre.

Spanish

Save record 1

Record 2 2012-01-04

English

Subject field(s)
  • Geophysics
  • Vulcanology and Seismology
CONT

The Gutenberg discontinuity occurs at a depth of 2,900 km and separates the mantle from the core. It has a considerable effect on seismic waves ...

OBS

One of the two major discontinuities in the structure of the Earth [the other being the Mohorovičić discontinuity].

French

Domaine(s)
  • Géophysique
  • Volcanologie et sismologie
DEF

Plan de séparation entre le noyau et le manteau à l'intérieur de la Terre, à 2 900 km de profondeur.

Spanish

Campo(s) temático(s)
  • Geofísica
  • Vulcanología y sismología
DEF

[Discontinuidad que] separa, a 2 900 km de profundidad, el manto del núcleo.

Save record 2

Record 3 2011-05-09

English

Subject field(s)
  • Geology
DEF

The outermost solid layer of the Earth, mostly consisting of crystalline rock and extending no more than a few miles from the surface to the Mohorovicic discontinuity.

CONT

Earth’s outermost, rigid, rocky layer is called the crust. It is composed of low-density, easily melted rocks; the continental crust is predominantly granitic rock, while composition of the oceanic crust corresponds mainly to that of basalt and gabbro. Analyses of seismic waves, generated by earthquakes within Earth’s interior, show that the crust extends about 50 km (30 miles) beneath the continents but only 5-10 km (3-6) miles beneath the ocean floors.

CONT

In composition, the Earth is made of three nested spheres. At the center of the Earth, a body of intensely hot iron and nickel forms the core. A less dense and much larger middle sphere is made of materials rich in iron, magnesium and calcium comprises the mantle. The outermost layer is a thin veneer of lighter rocks called the crust.

French

Domaine(s)
  • Géologie
DEF

Couche de roches située près de la surface de la Terre.

CONT

Au cours des temps géologiques, l'écorce se différencia en une croûte continentale formée principalement de roches granitiques [...] et en une croûte océanique formée de roches basaltiques [...] La limite entre le manteau et l'écorce est appelé discontinuité de Mohorovicic ou Moho.

CONT

La partie la plus superficielle de la partie solide [de la Terre] c'est la croûte. Sous les océans, elle ne dépasse pas sept kilomètres d'épaisseur, alors que sous les continents, elle varie entre 20 et 70 kilomètres.

Spanish

Campo(s) temático(s)
  • Geología
DEF

Parte superior de la envolvente externa del globo terráqueo, que yace sobre el manto a lo largo de la discontinuidad de Mohorovicic.

OBS

Constituye el 1 por 1 000 del volumen de la Tierra, con un grosor bastante variable.

Save record 3

Record 4 2004-11-03

English

Subject field(s)
  • Vulcanology and Seismology
DEF

The boundary surface or sharp seismic-velocity discontinuity that separates the Earth’s crust from the subjacent mantle ...

OBS

... the discontinuity should be defined by seismic velocities alone ...

OBS

Mohorovicic discontinuity; Moho; M discontinuity : term(s) extracted from the "Disarmament and Peace Keeping" glossary with the permission of the United Nations Office at Geneva.

French

Domaine(s)
  • Volcanologie et sismologie
DEF

Discontinuité définissant la transition entre la croûte et le manteau, où l'on observe une augmentation brutale des vitesses des ondes sismiques longitudinales qui passent de 6-7 km/s à 8 km/s environ.

CONT

[...] l'usage est de placer la limite supérieure du manteau et la base de l'écorce au niveau de la discontinuité de Mohorovicic, où la vitesse des ondes longitudinales subit une augmentation rapide [...]

OBS

discontinuité de Mohorovicic; Moho; discontinuité M :terme(s) tiré(s) du lexique «Désarmement et Maintien de la Paix» avec l'autorisation de l'Office des Nations Unies à Genève.

Spanish

Campo(s) temático(s)
  • Vulcanología y sismología
DEF

Límite entre la corteza terrestre y el manto, a 30 km [de profundidad].

Save record 4

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