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FRACTURE CONIQUE [2 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2011-01-12

English

Subject field(s)
  • Vulcanology and Seismology
  • Geomorphology and Geomorphogeny
DEF

A volcano in the shape of a flattened dome, broad and low, built by flows of very fluid basaltic lava or by rhyolitic ash flows.

CONT

Volcanoes that have a long history of eruptions of the quiet lava type usually have gently slopes. They are called shield volcanoes or lava domes and the lava is usually of basaltic composition and low viscosity.

OBS

[Shield volcanoes] differ from the floods in being recognizably peaked ... and from all other known volcanoes in being larger. Their distribution is linear, suggesting fracture control, but their contours form closed loops about individual centers or short fissures.

OBS

volcano (plural: volcanos or volcanoes).

OBS

shield volcano: term used at Natural Resources Canada - Earth Sciences Sector.

Key term(s)
  • shield volcanos
  • shield volcanoes
  • Hawaiian volcanos
  • Hawaiian volcanoes

French

Domaine(s)
  • Volcanologie et sismologie
  • Géomorphologie et géomorphogénie
DEF

Volcan très étendu et à pente faible, érigé par éruption centrale de lave et construit à partir de la superposition des coulées successives de lave, de plusieurs dizaines de kilomètres de diamètre.

CONT

[Les volcans en boucliers] diffèrent des nappes de basalte en ce qu'ils ont un profil nettement conique [...] et de tous les autres volcans par leur plus grande taille. Leur distribution le long d’une ligne suggère leur liaison possible avec une fracture, mais leurs contours sont ceux de boucles formées autour de centres uniques, ou de courtes fissures.

CONT

Le cône de lave résulte de la superposition de couches de laves, issues du cratère principal, ou de fissures latérales.

OBS

Pluriel : volcans-boucliers.

OBS

volcan-bouclier : terme en usage à Ressources naturelles Canada - Secteur des sciences de la Terre.

Key term(s)
  • volcan hawaiien

Spanish

Campo(s) temático(s)
  • Vulcanología y sismología
  • Geomorfología y geomorfogénesis
Save record 1

Record 2 2010-12-19

English

Subject field(s)
  • Astrophysics and Cosmography
  • Geomorphology and Geomorphogeny
DEF

A distinctively striated conical structure in rocks, ranging in length from less than a centimeter to several meters, along which fracturing has occurred.

CONT

The presence of shatter cones is evidence that there has been meteor impact.

CONT

The shock features include shatter cones, and planar dislocations and kink bands in certain rock-forming minerals ...

OBS

[Shatter cones are] generally found in nested or composite groups in the rocks of impact structures and formed by shock waves generated by impact.

OBS

shatter cone: term used at Natural Resources Canada - Earth Sciences Sector.

Key term(s)
  • shattercone
  • shatter-cone
  • shear-cone
  • pressure-cone

French

Domaine(s)
  • Astrophysique et cosmographie
  • Géomorphologie et géomorphogénie
DEF

Structure conique striée qui se forme dans les roches à grains fins sous la pression intense d’un impact météoritique.

CONT

L’onde de choc génère des dommages permanents dans les roches de la région cible, dommages d’aspect unique qui permettent de reconnaître sans ambiguïté un site d’impact. Il s’agit, entre autres, de fractures coniques ou shattercones.

CONT

[Les] structures de choc comprennent des fractures coniques ainsi que des plans de dislocation et des kinkbands dans certains minéraux essentiels des roches ignées [...]

CONT

Les cônes de percussion sont encore appelés cônes de pression, de fracturation, et shatter cones par les auteurs américains. Ils se développent dans les roches compétentes à grain fin (microgranites, lamprophyres). La roche présente un débit suivant des surfaces coniques dont les stries divergent à partir du sommet du cône.

OBS

cône de fracturation : terme en usage à Ressources naturelles Canada - Secteur des sciences de la Terre.

Spanish

Save record 2

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