201.4 - 174.7 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. 2023. The ICS International Chronostratigraphic Chart v2023/09. view

There are intervals in 5 timescales which overlap this one. show

• International Chronostratigraphic Timescale: Toarcian age, Sinemurian age, Pliensbachian age, Hettangian age
• Mesozoic Subages: Middle Toarcian subage, Early Toarcian subage, Early Sinemurian subage, Early Hettangian subage, Late Sinemurian subage, Late Hettangian subage, Early Pliensbachian subage, Middle Hettangian subage, Late Pliensbachian subage, Late Toarcian subage
• Ammonite Chrons of Northwest Europe: Oxynotum chron, Tenuicostatum chron, Jamesoni chron, Levesquei chron, Serpentinum chron, Bucklandi chron, Variabilis chron, Semicostatum chron, Spinatum chron, Obtusum chron, Margaritatus chron, Angulata chron, Raricostatum chron, Turneri chron, Davoei chron, Ibex chron, Bifrons chron, Falciferum chron, Planorbis chron, Thouarsense chron, Liasicus chron
• Ammonite Chrons of North America: Canadensis chron, Kunae chron, Yakounensis chron, Crassicosta chron, Pseudaetomoceras chron, Carlottense chron, Tetraspidoceras chron, Asteroceras varians chron, Kanense chron, Hillebrandti chron, Franziceras chron, Planulata chron, Imlayi chron, Whiteavesi chron, Plesechioceras harbledownense chron, Coroniceras chron, Arnioceras arnouldi chron, Freboldi chron, Psiloceras chron, Euphyllites chron
• Permian-Jurassic of New Zealand: Ururoan age, Aratauran age, Temaikan age, Kawhia epoch, Herangi epoch

This interval is used in the definition of 524 collections

A total of 14086 collections with 69661 occurrences lie within this time span