Dévonien moyen

Dévonien moyen
Notation chronostratigraphique D2
Notation française d4-5
Notation RGF d4-5
Niveau Époque / Série
Période / Système
- Érathème / Ère
-- Éonothème / Éon
Dévonien
Paléozoïque
Phanérozoïque

Stratigraphie

DébutFin
Point stratotypique mondial 393,3 ± 1,2 Ma Point stratotypique mondial 382,7 ± 1,6 Ma

Le Dévonien moyen est la deuxième des trois époques du Dévonien s’étendant de 393,3 ± 1,2 à 382,7 ± 1,6 millions d’années. Il est suivi par le Dévonien supérieur et précédé par le Dévonien inférieur.

Subdivisions

Le Dévonien moyen est subdivisé en deux étages géologiques, le Givétien et l'Eifélien. Les datations des subdivisions ont été revues par la Commission internationale de stratigraphie (ICS) en 2012[1],[2].

  Givétien (387,7 ± 0,8 à 382,7 ± 1,6 Ma)
  Eifélien (393,3 ± 1,2 à 387,7 ± 0,8 Ma)

Sources et références

  1. [PDF] (en) « International chronostratigraphic chart (2012) », sur stratigraphy.org.
  2. (en) F.M. Gradstein, J.G Ogg, M. Schmitz et G. Ogg, The Geologic Time Scale 2012, Elsevier, , 1176 p. (ISBN 978-0-444-59448-8, lire en ligne).

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