Middle Jurassic (174.1 +/-1.0 Ma)
Back to Jurassic (201.4 +/-0.2 Ma)Representation and status
- Color CMYK
- 50 / 0 / 5 / 0
- Color RGB
- R: 128 G: 207 B: 216
- Rank
- chronostratigraphic Epoch
- Validity
- Unit is in Use
- Status
- valid formal name
- Status discussion
Nomenclature
- Deutsch
- Mittlerer Jura
- Français
- Jurassique moyen
- Italiano
- Giurassico medio
- English
- Middle Jurassic (174.1 +/-1.0 Ma)
- Historical Variants
-
Mésojurassique (Lugeon 1910), Série médiojurassique (Revil), Dogger [sic]
Hierarchy and sequence
- Units at roof
Age
- Age at top
-
- Callovian
- Age at base
-
- Aalenian
-
Callovian (166.1 +/-1.2 Ma)
- Name Origin
-
Named derived from the old spelling of Kellaways Bridge (UK), Wiltshire, 2 miles NE Chippenham.
- Rank
- chronostratigraphic Stage
- Status
- valid formal name
- In short
-
Last stage of the Middle Jurassic.
- Age
- Callovian
-
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.
- Rank
- chronostratigraphic Stage
- Status
- valid formal name
- In short
-
Third stage of the Middle Jurassic.
- Age
- Bathonian
-
Bajocian (170.3 +/-1.4 Ma)
- Name Origin
-
Named after the town of Bayeux (Calvados, France) in Normandy.
- Rank
- chronostratigraphic Stage
- Status
- valid formal name
- Nomenclatorial Remarks
- <p>Latin: Bajocium</p>
- In short
-
Second stage of the Middle Jurassic.
- Age
- Bajocian
-
Gaetani Oceanic Anoxic Event
- Name Origin
-
Named in recognition of Maurizio Gaetani's work on Jurassic sedimentary successions of the Lombardy Basin.
- Rank
- Oceanic Anoxic Event
- Status
- informal term
- In short
-
Black shale interval locally developped at the transition betwenn the Rosso Ammonitico Lombardo and the Radiolarite Group.
- Age
- early Bajocian
-
Aalenian (174.1 +/-1.0 Ma)
- Name Origin
-
Named after the town of Aalen (Germany), Baden-Württemberg
- Rank
- chronostratigraphic Stage
- Status
- valid formal name
- In short
-
First stage of the Middle Jurassic.
- Age
- Aalenian