Aalenian (174.1 +/-1.0 Ma)
Back to Toarcian (184.2 +/-0.3 Ma)Representation and status
- Index
- aal
- Color CMYK
- 40 / 0 / 5 / 0
- Color RGB
- R: 154 G: 217 B: 221
- Rank
- chronostratigraphic Stage
- Validity
- Unit is in Use
- Status
- valid formal name
- Status discussion
Nomenclature
- Deutsch
- Aalénien (CH) (DE/AT: Aalenium)
- Français
- Aalénien
- Italiano
- Aaleniano
- English
- Aalenian (174.1 +/-1.0 Ma)
- Origin of the Name
-
Named after the town of Aalen (Germany), Baden-Württemberg
- Historical Variants
-
Aalenium (Mayer-Eymar 1864, Mayer-Eymar 1874), Aalenien (Studer 1872), Aalénien (Mayer-Eymar 1888, Mouterde et al. 1956)
Hierarchy and sequence
- Units at roof
- Lower boundary
-
Base defined by the first appearance of the ammonite species Leioceras opalinum (Reinecke 1818).
Age
- Age at top
-
- Aalenian
- Age at base
-
- Aalenian
Geography
- Type area
- Schwäbische Alb (Baden-Württemberg, S Germany)
References
- Definition
- (1864) : Tableau de synchronisation des terrains jurassiques.
- Definition
- (1956) : Lias. Lexique stratigraphique international, vol. 1 Europe, Fasc. 4a IV