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chrontour [1 record]

Record 1 2011-12-12

English

Subject field(s)
  • Geophysics
  • Cartography
DEF

chrontours: Contours of equal cooling age.

CONT

There is a close correlation of the site-mean directions with the position of the sampling sites with respect to the contours ("chrontours") of the K-Ar [potassium-argon] cooling age. Sites where stable NRM [natural remanent magnetization] has SE [south-east] declinations and shallow (+20°) inclinations have the oldest chrontour ages (~ 468 Myr).

OBS

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

OBS

chrontour: term usually used in the plural (chrontours).

Key term(s)
  • chrontours

French

Domaine(s)
  • Géophysique
  • Cartographie
CONT

Selon les courbes d'évolution proposées par Zartman et Doe (1981), ces compositions isotopiques se placent entre la croûte supérieure et l'orogène dans le diagramme uranogénique [...] et à gauche de l'orogène dans le diagramme thorogénique [...]

OBS

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

OBS

courbe géochronologique; courbe d'évolution chronologique; courbe chronologique; courbe d'évolution; chronocourbe : termes généralement utilisés au pluriel (courbes géochronologiques; courbes d'évolution chronologique; courbes chronologiques; courbes d'évolution; chronocourbes).

Key term(s)
  • courbes géochronologiques
  • courbes d'évolution chronologique
  • courbes chronologiques
  • courbes d'évolution
  • chronocourbes

Spanish

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