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

This interval is used in the definition of 85 collections

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