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BIRRIMIAN [1 record]

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Record 1 2003-08-12

English

Subject field(s)
  • Geology
CONT

In the Sahara region of North Africa, two major rock divisions have been observed; the lower is known as Suggarian and the upper, Pharusian. To the southwest, in former French West Africa and Ghana, the names Dahomeyan, Birrimian and Tarkwaian have been used over a large area.

PHR

Birrimian formation.

French

Domaine(s)
  • Géologie
CONT

L'Archéen se rencontre dans tous les boucliers : Léwisien du bouclier des Hébrides, Bothnien du bouclier baltique; il lui correspond la série pharusienne (Sahara) - birrimienne (Afrique occidentale) et la série suggarienne (Sahara) - dahomeyenne (Afrique occidentale) du bouclier africain, la première plus récente, la seconde plus ancienne, ainsi comparables respectivement au Timiskaming et au Keewatin.

CONT

Formations birrimiennes du sud-est de la Côte d'Ivoire.

Spanish

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