Early Jurassic (~ 200 Ma)

Torna a cronostratigrafia

Rappresentazione e statuto

Colore CMYK
75 / 5 / 0 / 0
Colore RGB
R: 66 G: 174 B: 208
Rango
Epoca cronostratigrafica
Uso
Unità in uso.
Status
termine formale valido
Discussione del statuto

Nomenclatura

Deutsch
Früher Jura
Français
Jurassique précoce
Italiano
Giurassico primo
English
Early Jurassic (~ 200 Ma)
Varianti storiche
Eojurassique (Lugeon 1910: incl. Rhétien et Aalénien), Série paléojurassique (Revil 1911), Lias [sic]

Età

Geomorfologia
  • Toarciano

Età alla base
  • Hettangiano

  • Toarcian (~ 183 Ma)

    Name Origin

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

     

    Rango
    Piano cronostratigrafico
    Statuto
    termine formale valido
    Nomenclatorial Remarks
    Latin: Toarcium
    In breve

     

    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
    Toarciano
    • Late Toarcian

      Rango
      Sotto-Piano cronostratigrafico
      Statuto
      termine formale valido
      Age
      Toarciano tardo
    • Middle Toarcian

      Rango
      Sotto-Piano cronostratigrafico
      Statuto
      termine formale valido
      In breve

       

      The Middle Toarcian is defined biostratigraphically by the ammonite genera Hildoceras and Haugia.

       

      Age
      Toarciano medio
    • Early Toarcian

      Rango
      Sotto-Piano cronostratigrafico
      Statuto
      termine formale valido
      In breve

       

      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
      primo Toarciano
      • Toarcian Oceanic Anoxic Event

        Rango
        OAE
        Statuto
        termine informale
        In breve

         

        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 Ma)

    Name Origin

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

     

    Rango
    Piano cronostratigrafico
    Statuto
    termine formale valido
    Age
    Pliensbachiano
    • Domerian

      Name Origin

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

       

      Rango
      Sotto-Piano cronostratigrafico
      Statuto
      termine informale
      In breve

       

      Informal substage corresponding to the late Pliensbachian.

       

      Age
      spätes Pliensbachien (= Domérien)
    • Carixian

      Name Origin

      Named after Charmouth (Dorset, UK).

       

      Rango
      Sotto-Piano cronostratigrafico
      Statuto
      termine informale
      Nomenclatorial Remarks
      Latin: Carixium
      In breve

       

      First, informal substage of the Pliensbachian.

       

      Age
      frühes Pliensbachien (= Carixien)
  • Sinemurian (~ 196 Ma)

    Name Origin

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

    Rango
    Piano cronostratigrafico
    Statuto
    termine formale valido
    Nomenclatorial Remarks
    <p>Latin: Sinemurium</p>
    Age
    Sinemuriano
    • Lotharingian

      Name Origin

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

      Rango
      cronostratigrafia
      Statuto
      termine obsoleto (abbandonato)
      In breve

       

      Former chronostratigraphic subdivision corresponding to the Late Sinemurian substage.

       

      Age
      Sinemuriano tardo
  • Hettangian (~ 200 Ma)

    Name Origin

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

     

    Rango
    Piano cronostratigrafico
    Statuto
    termine formale valido
    In breve

     

    First stage of the Jurassic.

     

    Age
    Hettangiano
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