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