Rupelian
| Rupelian | |||||||||||||
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| Chronology | |||||||||||||
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| Formerly part of | Tertiary Period/System | ||||||||||||
| Etymology | |||||||||||||
| Name formality | 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 | LAD of Planktonic Foraminiferans Hantkenina and Cribrohantkenina | ||||||||||||
| Lower boundary GSSP | Massignano quarry section, Massignano, Ancona, Italy 43°31′58″N 13°36′04″E / 43.5328°N 13.6011°E | ||||||||||||
| Lower GSSP ratified | 1992 | ||||||||||||
| Upper boundary definition | LAD of the Planktonic Foraminifer Chiloguembelina (Base of Foram Zone P21b) | ||||||||||||
| Upper boundary GSSP | Monte Cagnero, Central Apennines, Italy 43°38′48″N 13°28′04″E / 43.6466°N 13.4677°E | ||||||||||||
| Upper GSSP ratified | September 2016 | ||||||||||||
The Rupelian, in the geologic timescale, the older of two ages or the lower of two stages of the Oligocene Epoch/Series. It spans the time between 33.9 and 27.3 Ma. It is preceded by the Priabonian Stage (part of the Eocene) and is followed by the Chattian Stage. The Rupelian is also known, informally, as the early Oligocene and lower Oligocene.