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

This interval is used in the definition of 524 collections

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