Jurassic (201.4 +/-0.2 Ma)

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Représentation et statut

Couleur CMYK
80 / 0 / 5 / 0
Couleur RGB
R: 52 G: 178 B: 201
Rang
Période chronostratigraphique
Usage
Ce terme est en usage.
Status
terme formel valide

Nomenclature

Deutsch
Jura
Français
Jurassique
Italiano
Giurassico
English
Jurassic (201.4 +/-0.2 Ma)
Origine du nom

Named after the Jura Mountains (France, Switzerland).

Variantes historiques

calcaire du Jura (von Humboldt 1795), terrain jurassique (Brongniart 1830, d'Omalius d'Halloy 1831), système Jurassique = période Jurassique (Haug 1910), Jurazeit

Hiérarchie et succession

Unités sus-jacentes

Âge

Âge au sommet
  • Tithonien
Âge à la base
  • Hettangien

Géographie

Région-type
Jura Mountains (France, Switzerland)
  • Late Jurassic (163.5 +/-1.0 Ma)

    Rang
    Époque chronostratigraphique
    Statut
    terme formel valide
    En bref

    The Late Jurassic is the last geochronologic subepoch of the Jurassic, starting with the Oxfordian age (at the transition from the Middle Jurassic subepoch) and ending with the Tithonian age (at the transition to the Early Cretaceous subepoch). It is subdivided in three ages (Oxfordian, Kimmeridgian and Tithonian).

    Age
    Oxfordien
    • Tithonian (152.1 +/-0.9 Ma)

      Name Origin

      Named derived from the Greek mythology: Tithon was the son of Laomedon of Troy, who fell in love with Eos, Greek goddess of the dawn (thus prefiguring the Cretaceous system).

      Rang
      Étage chronostratigraphique
      Statut
      terme formel valide
      Nomenclatorial Remarks
      <p>The Berriasella jacobi Zone, previously&nbsp;placed at the end of the Tithonian, is now considered as defining the start&nbsp;of the Berriasian.</p>
      En bref

      Last stage of the Jurassic.

      Age
      Tithonien
    • Kimmeridgian (157.3 +/-1.0 Ma)

      Name Origin

      Named after the town of Kimmeridge on the Dorset coast (UK). The Kimmeridge Clay Formation is the main oil source rock in the North Sea petroleum province.

      Rang
      Étage chronostratigraphique
      Statut
      terme formel valide
      Age
      Kimméridgien
    • Oxfordian (163.5 +/-1.0 Ma)

      Name Origin

      Named after the city of Oxford (UK).

      Rang
      Étage chronostratigraphique
      Statut
      terme formel valide
      En bref

      First stage of the Late Jurassic.

      Age
      Oxfordien
  • Middle Jurassic (174.1 +/-1.0 Ma)

    Rang
    Époque chronostratigraphique
    Statut
    terme formel valide
    En bref

    The Middle Jurassic is the middle geochronologic subepoch of the Jurassic, starting with the Aalenian age (at the transition from the Early Jurassic subepoch) and ending with the Callovian age (at the transition to the Late Jurassic subepoch). It is subdivided in four ages (Aalenian, Bajocian, Bathonian and Callovian).

    Age
    Aalénien
    • Callovian (166.1 +/-1.2 Ma)

      Name Origin

      Named derived from the old spelling of Kellaways Bridge (UK), Wiltshire, 2 miles NE Chippenham.

      Rang
      Étage chronostratigraphique
      Statut
      terme formel valide
      En bref

      Last stage of the Middle Jurassic.

      Age
      Callovien
    • Bathonian (168.3 +/-1.3 Ma)

      Name Origin

      Named after the town of Bath (Somerset, UK), near Bristol. The city itself is largely built of Bath Stone, a bright white oolithic limestone that is quarried nearby.

      Rang
      Étage chronostratigraphique
      Statut
      terme formel valide
      En bref

      Third stage of the Middle Jurassic.

      Age
      Bathonien
    • Bajocian (170.3 +/-1.4 Ma)

      Name Origin

      Named after the town of Bayeux (Calvados, France) in Normandy.

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

      Second stage of the Middle Jurassic.

      Age
      Bajocien
      • Gaetani Oceanic Anoxic Event

        Name Origin

        Named in recognition of Maurizio Gaetani's work on Jurassic sedimentary successions of the Lombardy Basin.

        Rang
        OAE
        Statut
        terme informel
        En bref

        Black shale interval locally developped at the transition betwenn the Rosso Ammonitico Lombardo and the Radiolarite Group.

        Age
        Bajocien précoce
    • Aalenian (174.1 +/-1.0 Ma)

      Name Origin

      Named after the town of Aalen (Germany), Baden-Württemberg

      Rang
      Étage chronostratigraphique
      Statut
      terme formel valide
      En bref

      First stage of the Middle Jurassic.

      Age
      Aalénien
  • Early Jurassic (201.3 +/-0.2 Ma)

    Rang
    Époque chronostratigraphique
    Statut
    terme formel valide
    En bref

    The Early Jurassic is the first geochronologic subepoch of the Jurassic, starting with the Hettangian age (at the transition from the Late Triassic subepoch) and ending with the Toarcian age (at the transition to the Middle Jurassic subepoch). It is subdivided in four ages (Hettangian, Sinemurian, Pliensbachian and Toarcian).

    Age
    Hettangien
    • Toarcian (184.2 +/-0.3 Ma)

      Name Origin

      Named after the town of Thouars (Deux-Sèvres, France), south of Saumur. The protected stratotype lies in an old quarry. Its GSSP is located at Peniche (Portugal).

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

      The Toarcian is the youngest geochronologic age of the Early Jurassic. Its base, at the transition from the Pliensbachian, is placed at the first appearance of the ammonite genus Eodactylites and the base of the Aalenian (first appearance of the ammonite genus Leioceras) defines its end.

      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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