Early Jurassic (201.3 +/-0.2 Ma)
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 (201.3 +/-0.2 Ma)
- Varianti storiche
-
Eojurassique (Lugeon 1910: incl. Rhétien et Aalénien), Série paléojurassique (Revil 1911), Lias [sic]
Gerarchia e successione
- Unità sovrastante
Età
- Geomorfologia
-
- Toarciano
- Età alla base
-
- Hettangiano
-
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).
- Rango
- Piano cronostratigrafico
- Statuto
- termine formale valido
- Nomenclatorial Remarks
- <p>Latin: Toarcium</p>
- In breve
-
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
- 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 (190.8 +/-1.0 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 (199.3 +/-0.3 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
-
Hettangian (201.3 +/-0.2 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