Early Jurassic (201.3 +/-0.2 Ma)

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Représentation et statut

Couleur CMYK
75 / 5 / 0 / 0
Couleur RGB
R: 66 G: 174 B: 208
Rang
Époque chronostratigraphique
Usage
Ce terme est en usage.
Status
terme formel valide
Discussion du statut

Nomenclature

Deutsch
Früher Jura
Français
Jurassique précoce
Italiano
Giurassico primo
English
Early Jurassic (201.3 +/-0.2 Ma)
Variantes historiques

Eojurassique (Lugeon 1910: incl. Rhétien et Aalénien), Série paléojurassique (Revil 1911), Lias [sic]

Âge

Âge au sommet
  • Toarcien
Âge à la base
  • Hettangien
  • Toarcian (182.7 +/-0.7 Ma)

    Name Origin

    Named after the town of Thouars (Deux-Sèvres, France), S Saumur. The protected stratotype lies in an old quarry.

    Rang
    Étage chronostratigraphique
    Statut
    terme formel valide
    Nomenclatorial Remarks
    <p>Latin: Toarcium</p>
    En bref

    The Pliensbachian/Toarcian boundary is marked by a major faunal turnover and regional stratigraphic gaps, followed by a global Oceanic Anoxic Event (OAE) recorded as black shales (such as the well-known «Posidonienschiefer» of Southern Germany, equivalent to the French «schistes-carton»).

    Age
    Toarcien
    • Late Toarcian

      Rang
      Sous-Étage chronostratigraphique
      Statut
      terme formel valide
      Age
      Toarcien tardif
    • Middle Toarcian

      Rang
      Sous-Étage chronostratigraphique
      Statut
      terme formel valide
      En bref
      The Middle Toarcian is defined biostratigraphically by the ammonite genera Hildoceras and Haugia.
      Age
      Toarcien moyen
    • Early Toarcian

      Rang
      Sous-Étage chronostratigraphique
      Statut
      terme formel valide
      En bref

      The Early Toarcian is characterized almost worldwide by black shales (among which the well-known «Posidonienschiefer» of Southern Germany, and the French «schistes-carton») with an ammonite fauna composed mainly of dactylioceratids, harpoceratids and early hildoceratids.

      Age
      Toarcien précoce
      • Toarcian Oceanic Anoxic Event

        Rang
        OAE
        Statut
        terme informel
        En bref

        Major oceanic anoxic event of the Early Toarcian (around 183 Ma ago), documented by black shale deposits found on all major continents (no oceanic drilling cores have recovered black shales of this age as there is little or no Toarcian ocean crust remaining in the world ocean). This event correlates with a marine extinction event.

  • Pliensbachian (190.8 +/-1.0 Ma)

    Name Origin

    Named after the village of Pliensbach (Baden-Württemberg, S Germany), 30 km E Stuttgart.

    Rang
    Étage chronostratigraphique
    Statut
    terme formel valide
    Age
    Pliensbachien
    • Domerian

      Name Origin

      Named after Monte Domaro (Italia), Val Trompia / Lombardia.

      Rang
      Sous-Étage chronostratigraphique
      Statut
      terme informel
      En bref
      Informal substage corresponding to the late Pliensbachian.
      Age
      spätes Pliensbachien (= Domérien)
    • Carixian

      Name Origin

      Named after Charmouth (Dorset, UK).

      Rang
      Sous-Étage chronostratigraphique
      Statut
      terme informel
      Nomenclatorial Remarks
      Latin: Carixium
      En bref
      First, informal substage of the Pliensbachian.
      Age
      frühes Pliensbachien (= Carixien)
  • Sinemurian (199.3 +/-0.3 Ma)

    Name Origin

    Named after the town of Sémur-en-Auxois (Côte-d'Or, France).

    Rang
    Étage chronostratigraphique
    Statut
    terme formel valide
    Nomenclatorial Remarks
    <p>Latin: Sinemurium</p>
    Age
    Sinémurien
    • Lotharingian

      Name Origin

      Named after the Lorraine region (Lotharingium = carolingian province), NE France.

      Rang
      chronostratigraphie
      Statut
      terme obsolète (abandonné)
      En bref

      Former chronostratigraphic subdivision corresponding to the Late Sinemurian substage.

      Age
      Sinémurien tardif
  • Hettangian (201.3 +/-0.2 Ma)

    Name Origin

    Named after the town of Hettange (Moselle, N France), just south of the border with Luxembourg,

    Rang
    Étage chronostratigraphique
    Statut
    terme formel valide
    En bref

    First stage of the Jurassic.

    Age
    Hettangien
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