Coniacian

Coniacian
89.8 ± 0.3 – 86.3 ± 0.5 Ma
Chronology
Etymology
Name formalityFormal
Usage information
Celestial bodyEarth
Regional usageGlobal (ICS)
Time scale(s) usedICS Time Scale
Definition
Chronological unitAge
Stratigraphic unitStage
Time span formalityFormal
Lower boundary definitionFAD of the Inoceramid Bivalve Cremnoceramus deformis erectus
Lower boundary GSSPSalzgitter-Salder quarry, Germany
52°07′27″N 10°19′46″E / 52.1243°N 10.3295°E / 52.1243; 10.3295
Lower GSSP ratifiedMay 2021
Upper boundary definitionFAD of the Inoceramid Bivalve Cladoceramus undulatoplicatus
Upper boundary GSSPOlazagutia, Spain
42°52′00″N 2°11′48″W / 42.8668°N 2.1968°W / 42.8668; -2.1968
Upper GSSP ratifiedJanuary 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]

  1. ^ International Commission on Stratigraphy. "ICS - Chart/Time Scale". www.stratigraphy.org.
  2. ^ 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.
  3. ^ See Gradstein et al. (2004) for a detailed version of the ICS' geologic timescale