458.5 - 449.7 Ma

The definition of this interval in the timescale Ordovician of Ibero-Bohemia is taken from the following source:

• F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 view

The top and bottom ages have been interpolated based on the differences between the ages for international timescale boundaries quoted in the source and the currently accepted ages for those boundaries.

There are intervals in 7 timescales which overlap this one. show

• International Chronostratigraphic Timescale: Katian age, Sandbian age, Darriwilian age, Middle Ordovician epoch, Late Ordovician epoch
• Ordovician of Britain: Cheneyan age, Early Llandeilo age, Middle Llandeilo age, Marshbrookian age, Soudleyan age, Harnagian age, Caradoc epoch, Onnian age, Burrellian age, Llandeilo age, Actonian age, Llandeilian age, Aurelucian age, Llanvirn epoch, Costonian age, Longvillian age, Woolstonian age, Late Llanvirn age, Late Llandeilo age, Streffordian age
• Ordovician of the Baltic: Nabala age, Aluoja age, Harju epoch, Uhaku age, Keila age, Viru epoch, Johvi age, Haljala age, Vormsi age, Idavere age, Kukruse age, Oandu age, Rakvere age
• Ordovician of Ibero-Bohemia: Liben age, Bohdalec age, Letna age, Vinice age, Zahorany age
• Ordovician of Australia: Gisbornian age, Eastonian age
• Ordovician of China: Xiaoxita age, Neichianshanian age, Hulo age, Hanjiang age, Guniu age, Shikou age
• Ordovician of North America: Whiterockian epoch, Maysvillian age, Rocklandian age, Chatfieldian age, Canadian age, Wildernessian age, Chazyan age, Richmondian age, Kirkfieldian age, Edenian age, Blackriveran age, Shermanian age, Cincinnatian epoch, Mohawkian epoch, Franklinian age, Ashbyan age, Turinian age, Marmor age, Trentonian age

This interval is used in the definition of 85 collections

A total of 5994 collections with 46524 occurrences lie within this time span