Serravallian
The Serravallian is, in the geologic timescale, an age or a stage in the middle Miocene Epoch/Series, which spans the time between 13.82 Ma and 11.63 Ma (million years ago). The Serravallian follows the Langhian and is followed by the Tortonian.
| Serravallian | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Chronology | |||||||||||
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| Formerly part of | Tertiary Period/System | ||||||||||
| Etymology | |||||||||||
| Geochronological name | Formal | ||||||||||
| Usage information | |||||||||||
| Celestial body | Earth | ||||||||||
| Regional usage | Global (ICS) | ||||||||||
| Time scale(s) used | ICS Time Scale | ||||||||||
| Definition | |||||||||||
| Chronological unit | Age | ||||||||||
| Stratigraphic unit | Stage | ||||||||||
| Time span formality | Formal | ||||||||||
| Lower boundary definition | Mi3b Oxygen-isotopic event (Global cooling episode) | ||||||||||
| Lower boundary GSSP | Ras il Pellegrin section, Fomm ir-Riħ Bay, Malta 35.9139°N 14.3361°E | ||||||||||
| Lower GSSP ratified | 2007 | ||||||||||
| Upper boundary definition | LAD of the Haptophyte Discoaster kugleri | ||||||||||
| Upper boundary GSSP | Monte dei Corvi Beach section, Ancona, Italy 43.5867°N 13.5694°E | ||||||||||
| Upper GSSP ratified | 2003 | ||||||||||
It overlaps with the middle of the Astaracian European Land Mammal Mega Zone, the upper Barstovian and lower Clarendonian North American Land Mammal Ages and the Laventan and lower Mayoan South American Land Mammal Ages. It is also coeval with the Sarmatian and upper Badenian Stages of the Paratethys time scale of Central and eastern Europe.
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