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

This interval is used in the definition of 85 collections

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