467.3 - 461.7 Ma

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

• W. B. Harland, R. L. Armstrong, A. V. Cox, L. E. Craig, A. G. Smith and D. G. Smith. 1990. A Geologic Time Scale 1989. view

The top age has 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: Darriwilian age, Middle Ordovician epoch
• Ordovician of Britain: Llanvirn epoch, Early Llanvirn age, Abereiddian age
• Ordovician of the Baltic: Viru epoch, Saka age, Oeland epoch, Volkhov age, Valaste age, Vaana age, Hunderum age, Kunda age, Aseri age, Aluoja age, Langevoja age
• Ordovician of Ibero-Bohemia: Oretanian age
• Ordovician of China: Dawan age, Hunjiang age, Guniu age, Daobaowan age, Ningkuo age, Hulo age
• Ordovician of North America: Chazyan age, Canadian age, Whiterockian epoch, Marmor age

This interval is no longer in current use

This interval is used in the definition of 11 collections

A total of 1303 collections with 6953 occurrences lie within this time span