Tortonian (11.63 Ma)
Back to Miocene (23.03 Ma)Representation and status
- Color CMYK
- 0/0/60/0
- Color RGB
- R: 255 G: 255 B: 102
- Rank
- chronostratigraphic Stage
- Validity
- Unit is in Use
- Status
- valid formal name
Nomenclature
- Deutsch
- Tortonien
- Français
- Tortonien
- Italiano
- Tortoniano
- English
- Tortonian (11.63 Ma)
- Origin of the Name
-
Named after the city of Tortona (Italia), Piemonte.
- Historical Variants
-
Tortonien (Mayer-Eymar 1857, Denizot et al. 1957), Tortoniano (dal Piaz & Tervisan 1956), Tortonium, Torton
Hierarchy and sequence
- Units at roof
- Upper boundary
-
FAD Globorotalia conomiozea (planktonic Foraminifera)
- Lower boundary
-
last common appearance of Discoaster kugleri (calcareous nannoplankton) and Globigerinoides subquadratus (planktonic Foraminifera), short normal polarized magnetic chronozone C5r.2n
Age
- Age at top
-
- late Miocene
- Age at base
-
- late Miocene
References
- Definition
- 1857) : Versuch einer neuen Klassifikation der Tertiär-Gebilde Europas. Verh. allg. schweiz. Ges. Natw. 165-199 (
- Definition
- 1956) : Italia. Lexique stratigraphique international, vol. 1 Europe, Fasc. 11 (