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Serravallian (13.82 Ma)

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Representation and status

Color CMYK: 0/0/65/0
Color RGB: R: 255 G: 255 B: 89

Rank: chronostratigraphic Stage
Validity: Unit is in Use
Status: valid formal name

Nomenclature

Deutsch: Serravallien
Français: Serravallien
Italiano: Serravalliano
English: Serravallian (13.82 Ma)

Origin of the Name: Named after the town of Serravalle Scrivia (Italia), Piemonte.

Historical Variants: Serravallien (Pareto 1865, Mayer-Eymar 1868), --- (Pareto 1865), Serravalliano (dal Piaz & Trevisan 1956), Serravallium

Hierarchy and sequence

Units at roof

Tortonian (11.63 Ma)

Upper boundary: last common appearance of Discoaster kugleri (calcareous nannoplancton) and Globigerinoides subquadratus (planctonic Foraminifera), short normal-polarized magnetic chronozone C5r.2n
Lower boundary: FAD Sphenolithus heteromorphus (calcareous nannoplancton), Mi3b oxygen isotope excursion marking the onset of the Middle Miocene Cooling step

Age

Age at top

middle Miocene

Age at base

middle Miocene

References

Definition: Pareto L. (1865) : Note sur les subdivisions que l'on pourrait établir dans les terrains de l'Apennin septentrional. Bull. Soc. géol. France (2) 22

Definition: dal Piaz G., Trevisan L. (1956) : Italia. Lexique stratigraphique international, vol. 1 Europe, Fasc. 11

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