459.7 - 458.5 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 6 timescales which overlap this one. show

• International Chronostratigraphic Timescale: Middle Ordovician epoch, Darriwilian age
• Ordovician of Britain: Llanvirn epoch, Middle Llandeilo age, Llandeilo age, Late Llandeilo age, Early Llandeilo age, Late Llanvirn age, Llandeilian age
• Ordovician of the Baltic: Uhaku age, Aluoja age, Viru epoch, Lasnamagi age
• Ordovician of Ibero-Bohemia: Letna age, Liben age
• Ordovician of China: Guniu age, Hulo age
• Ordovician of North America: Canadian age, Marmor age, Chazyan age, Whiterockian epoch

This interval is used in the definition of 115 collections

A total of 151 collections with 1360 occurrences lie within this time span