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PRESSURE-CONE [1 record]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 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

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