Carnian
The Carnian (less commonly, Karnian) is the lowermost stage of the Upper Triassic Series (or earliest age of the Late Triassic Epoch). It lasted from 237 to 227 million years ago (Ma). The Carnian is preceded by the Ladinian and is followed by the Norian. Its boundaries are not characterized by major extinctions or biotic turnovers, but a climatic event (known as the Carnian pluvial episode characterized by substantial rainfall) occurred during the Carnian and seems to be associated with important extinctions or biotic radiations. Another extinction occurred at the Carnian-Norian boundary, ending the Carnian age.
| Carnian | |||||||||||||||||||||||
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| Etymology | |||||||||||||||||||||||
| Name formality | Formal | ||||||||||||||||||||||
| Alternate spelling(s) | Karnian | ||||||||||||||||||||||
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| 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 Ammonite Daxatina canadensis | ||||||||||||||||||||||
| Lower boundary GSSP | Prati di Stuores, Dolomites, Italy 46.5269°N 11.9303°E | ||||||||||||||||||||||
| Lower GSSP ratified | 2008 | ||||||||||||||||||||||
| Upper boundary definition | Not formally defined | ||||||||||||||||||||||
| Upper boundary definition candidates | Base of Stikinoceras kerri ammonoid zone and near FAD of Metapolygnathus echinatus within the M. communisti conodont zones | ||||||||||||||||||||||
| Upper boundary GSSP candidate section(s) |
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