Middle Toarcian
Back to Toarcian (184.2 +/-0.3 Ma)Representation and status
- Color CMYK
- (33%,9%,0%,11%)
- Color RGB
- R: 153 G: 206 B: 227
- Rank
- chronostratigraphic Substage
- Validity
- Unit is in Use
- Status
- valid formal name
- Status discussion
Nomenclature
- Deutsch
- Mittleres Toarcium (CH: Mittleres Toarcien)
- Français
- Toarcien moyen
- Italiano
- Toarciano medio
- English
- Middle Toarcian
Hierarchy and sequence
- Lower boundary
- Base defined by the firts appearance of the ammonite genus Hildoceras (more specifically by the species H. sublevisoni, which succeded to Orthildaites douvillei).
Age
- Age at top
-
- middle Toarcian
- Note about top
- Variabilis/Gradata Zone, Vitiosa Subzone
- Age at base
-
- middle Toarcian
- Note about base
- Bifrons Zone, Sublevisoni Subzone
- Dating Method
- Ammonite biostratigraphy.