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

This interval is used in the definition of 522 collections

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