469.4 - 458.2 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. 2024. The ICS International Chronostratigraphic Chart v2024/12. International Commission on Stratigraphy view

There are intervals in 6 timescales which overlap this one. show

• International Chronostratigraphic Timescale: Middle Ordovician epoch
• Ordovician of Britain: Fennian age, Abereiddian age, Late Llandeilo age, Llandeilo age, Arenig epoch, Llandeilian age, Late Llanvirn age, Early Llandeilo age, Middle Llandeilo age, Early Llanvirn age, Llanvirn epoch
• Ordovician of the Baltic: Vaana age, Saka age, Kunda age, Volkhov age, Aseri age, Aluoja age, Valaste age, Viru epoch, Uhaku age, Oeland epoch, Langevoja age, Hunderum age, Lasnamagi age
• Ordovician of Ibero-Bohemia: Letna age, Liben age, Oretanian age, Sarka age, Dobrotivian age, Bohdalec age, Vinice age, Arenigian age, Zahorany age, Berounian age
• Ordovician of China: Hulo age, Guniu age, Dawan age, Ningkuo age, Hunjiang age, Daobaowan age
• Ordovician of North America: Canadian age, Marmor age, Chazyan age, Whiterockian epoch

This interval is used in the definition of 467 collections

A total of 3311 collections with 19316 occurrences lie within this time span