TERMIUM Plus®

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PRISMATIC JOINTING [1 record]

Record 1 2010-09-09

English

Subject field(s)
  • Petrography
  • Vulcanology and Seismology
DEF

A structure characterized by parallel prismatic columns, polygonal in cross section, generally occurring in basaltic flows, as the result of contraction during cooling.

French

Domaine(s)
  • Pétrographie
  • Volcanologie et sismologie
DEF

[Structure que présentent des] agrégats à arêtes nettement anguleuses et/ou faces planes, allongés suivant une orientation préférentielle verticale.

CONT

Certaines laves, en particulier les basaltes, prennent souvent, en se solidifiant, une structure prismée, les joints étant normalement perpendiculaires aux surfaces de refroidissement.

Spanish

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