Tortonian (11.63 Ma)

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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
Mayer-Eymar K. (1857) : Versuch einer neuen Klassifikation der Tertiär-Gebilde Europas. Verh. allg. schweiz. Ges. Natw. 165-199
Definition
dal Piaz G., Trevisan L. (1956) : Italia. Lexique stratigraphique international, vol. 1 Europe, Fasc. 11
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