Coniacian
The Coniacian is an age or stage in the geologic timescale. It is a subdivision of the Late Cretaceous Epoch or Upper Cretaceous Series and spans the time between 89.8 ± 1 Ma and 86.3 ± 0.7 Ma (million years ago). The Coniacian is preceded by the Turonian and followed by the Santonian.
| Coniacian | |||||||||
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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 Inoceramid Bivalve Cremnoceramus deformis erectus | ||||||||
| Lower boundary GSSP | Salzgitter-Salder quarry, Germany 52.1243°N 10.3295°E | ||||||||
| Lower GSSP ratified | May 2021 | ||||||||
| Upper boundary definition | FAD of the Inoceramid Bivalve Cladoceramus undulatoplicatus | ||||||||
| Upper boundary GSSP | Olazagutia, Spain 42.8668°N 2.1968°W | ||||||||
| Upper GSSP ratified | January 2013 | ||||||||
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