TERMIUM Plus®

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Footwall Breccia [1 record]

Record 1 2003-09-22

English

Subject field(s)
  • Geological and Other Scientific Names
  • Petrography
OBS

... the [Sudbury Igneous] Complex is underlain by a quasi conformable "Footwall Breccia" of variable thickness that is leucocratic and prominent in the North Range, but more obscure in the South Range ...

OBS

The North Range Footwall Breccia is a highly variable unit whose clasts consist largely of Levack Gneiss set in a fine grained granoblastic matrix of plagioclase, quartz, biotite, amphibole, and pyroxene.

French

Domaine(s)
  • Noms géologiques ou scientifiques
  • Pétrographie
OBS

[...] le Complexe [igné de Sudbury] repose sur une brèche leucocrate d'épaisseur variable, aux contacts quasi concordants, appelée «Brèche du mur» (Footwall Breccia); elle est facilement identifiable dans le flanc nord mais l'est moins dans le flanc sud [...]

OBS

La Brèche du mur du flanc nord est une unité de caractère très variable dont les clastes dérivent surtout du Gneiss de Levack; la matrice montre une texture granoblastique et un grain fin et se compose de plagioclase, de quartz, de biotite, d'amphibole et de pyroxène.

Spanish

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