445.2 - 443.8 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 7 timescales which overlap this one. show

• International Chronostratigraphic Timescale: Late Ordovician epoch
• Ordovician of Britain: Ashgill epoch
• Ordovician of the Baltic: Porkuni age, Harju epoch
• Ordovician of Ibero-Bohemia: Kosovian age
• Ordovician of Australia: Bolindian age
• Ordovician of China: Shikou age, Xiaoxita age, Wufeng age
• Ordovician of North America: Cincinnatian epoch, Gamachian age

This interval is used in the definition of 484 collections

A total of 741 collections with 3956 occurrences lie within this time span