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| Coniacian | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 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°07′27″N 10°19′46″E / 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°52′00″N 2°11′48″W / 42.8668°N 2.1968°W | ||||||||
| Upper GSSP ratified | January 2013[2] | ||||||||
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.[3]
- ^ International Commission on Stratigraphy. "ICS - Chart/Time Scale". www.stratigraphy.org.
- ^ Lamolda, M.; Paul, C.; Peryt, D.; Pons, J. (March 2014). "The Global Boundary Stratotype and Section Point (GSSP) for the base of the Santonian Stage, "Cantera de Margas", Olazagutia, northern Spain". Episodes. 37 (1): 2–13. doi:10.18814/epiiugs/2014/v37i1/001. Retrieved 24 December 2020.
- ^ See Gradstein et al. (2004) for a detailed version of the ICS' geologic timescale