Jurassic (201.4 +/-0.2 Ma)
Retour à chronostratigraphieReprésentation 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 hiérarchiquement subordonnées
- Unités sus-jacentes
Âge
- Âge au sommet
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- Tithonien
- Âge à la base
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- Hettangien
Géographie
- Région-type
- Jura Mountains (France, Switzerland)
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Late Jurassic (163.5 +/-1.0 Ma)
- Rang
- Époque chronostratigraphique
- Statut
- terme formel valide
- En bref
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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
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Tithonian (152.1 +/-0.9 Ma)
- Name Origin
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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 placed at the end of the Tithonian, is now considered as defining the start of the Berriasian.</p>
- En bref
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Last stage of the Jurassic.
- Age
- Tithonien
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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
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Oxfordian (163.5 +/-1.0 Ma)
- Name Origin
-
Named after the city of Oxford (UK).
- Rang
- Étage chronostratigraphique
- Statut
- terme formel valide
- En bref
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First stage of the Late Jurassic.
- Age
- Oxfordien
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Middle Jurassic (174.1 +/-1.0 Ma)
- Rang
- Époque chronostratigraphique
- Statut
- terme formel valide
- En bref
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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
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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
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Bathonian (168.3 +/-1.3 Ma)
- Name Origin
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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
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Third stage of the Middle Jurassic.
- Age
- Bathonien
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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
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Second stage of the Middle Jurassic.
- Age
- Bajocien
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Gaetani Oceanic Anoxic Event
- Name Origin
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Named in recognition of Maurizio Gaetani's work on Jurassic sedimentary successions of the Lombardy Basin.
- Rang
- OAE
- Statut
- terme informel
- En bref
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Black shale interval locally developped at the transition betwenn the Rosso Ammonitico Lombardo and the Radiolarite Group.
- Age
- Bajocien précoce
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Aalenian (174.1 +/-1.0 Ma)
- Name Origin
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Named after the town of Aalen (Germany), Baden-Württemberg
- Rang
- Étage chronostratigraphique
- Statut
- terme formel valide
- En bref
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First stage of the Middle Jurassic.
- Age
- Aalénien
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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
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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
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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
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Late Toarcian
- Rang
- Sous-Étage chronostratigraphique
- Statut
- terme formel valide
- Age
- Toarcien tardif
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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
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Early Toarcian
- Rang
- Sous-Étage chronostratigraphique
- Statut
- terme formel valide
- En bref
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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
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Toarcian Oceanic Anoxic Event
- Rang
- OAE
- Statut
- terme informel
- En bref
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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.
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Pliensbachian (190.8 +/-1.0 Ma)
- Name Origin
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Named after the village of Pliensbach (Baden-Württemberg, S Germany), 30 km E Stuttgart.
- Rang
- Étage chronostratigraphique
- Statut
- terme formel valide
- Age
- Pliensbachien
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Domerian
- Name Origin
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Named after Monte Domaro (Italia), Val Trompia / Lombardia.
- Rang
- Sous-Étage chronostratigraphique
- Statut
- terme informel
- En bref
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Informal substage corresponding to the late Pliensbachian.
- Age
- spätes Pliensbachien (= Domérien)
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Carixian
- Name Origin
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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)
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Sinemurian (199.3 +/-0.3 Ma)
- Name Origin
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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
-
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
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First stage of the Jurassic.
- Age
- Hettangien