Kimmeridgian

Kimmeridgian
154.8 ± 0.8 – 149.2 ± 0.7 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 Ammonite Pictonia baylei
Lower boundary GSSPFlodigarry, Skye, Scotland, UK
57°39′40″N 6°14′44″W / 57.6610°N 6.2455°W / 57.6610; -6.2455
Lower GSSP ratified2021[2]
Upper boundary definitionNot formally defined
Upper boundary definition candidates
Upper boundary GSSP candidate section(s)

In the geologic timescale, the Kimmeridgian is an age in the Late Jurassic Epoch and a stage in the Upper Jurassic Series. It spans the time between 154.8 ±0.8 Ma and 149.2 ±0.7 Ma (million years ago). The Kimmeridgian follows the Oxfordian and precedes the Tithonian.[2]

  1. ^ "International Chronostratigraphic Chart" (PDF). International Commission on Stratigraphy.
  2. ^ a b "Global Boundary Stratotype Section and Point". International Commission of Stratigraphy. Retrieved 25 July 2021.