Wordian
In the geologic timescale, the Wordian is an age or stage of the Permian. It is the middle of three subdivisions of the Guadalupian Epoch or Series. The Wordian lasted between 266.9 and 264.28 million years ago (Ma). It was preceded by the Roadian and followed by the Capitanian.
| Wordian | |||||||||||||
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| Chronology | |||||||||||||
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| 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 | FAD of the Conodont Jinogondolella aserrata | ||||||||||||
| Lower boundary GSSP | Guadalupe Pass, Guadalupe Mountains, Texas, USA 31.8658°N 104.8328°W | ||||||||||||
| Lower GSSP ratified | 2001 | ||||||||||||
| Upper boundary definition | FAD of the Conodont Jinogondolella postserrata | ||||||||||||
| Upper boundary GSSP | Nipple Hill, Guadalupe Mountains, Texas, USA 31.9091°N 104.7892°W | ||||||||||||
| Upper GSSP ratified | 2001 | ||||||||||||
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