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

This interval is used in the definition of 522 collections

A total of 14088 collections with 69681 occurrences lie within this time span