199.5 - 192.9 Ma

The definition of this interval in the timescale International Chronostratigraphic Timescale is taken from the following source:

• K. M. Cohen, S.C. Finney, P.L. Gibbard and J.-X. Fan. 2024. The ICS International Chronostratigraphic Chart v2024/12. International Commission on Stratigraphy view

There are intervals in 6 timescales which overlap this one. show

• International Chronostratigraphic Timescale: Early Jurassic epoch
• Mesozoic Subages: Late Sinemurian subage, Early Sinemurian subage
• Ammonite Chrons of Northwest Europe: Obtusum chron, Semicostatum chron, Raricostatum chron, Bucklandi chron, Oxynotum chron, Turneri chron
• Ammonite Chrons of North America: Asteroceras varians chron, Pseudaetomoceras chron, Coroniceras chron, Plesechioceras harbledownense chron, Franziceras chron, Euphyllites chron, Arnioceras arnouldi chron, Psiloceras chron, Canadensis chron
• Calcareous Nannoplankton Zones: NJ3 zone, NJ2 zone, NJ2a zone, NJ2b zone
• Permian-Jurassic of New Zealand: Aratauran age, Herangi epoch

This interval is used in the definition of 1004 collections

A total of 2294 collections with 12621 occurrences lie within this time span