477.9 - 466.3 Ma

The definition of this interval in the timescale Ordovician of China is taken from the following source:

• B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 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 8 timescales which overlap this one. show

• International Chronostratigraphic Timescale: Tremadocian age, Darriwilian age, Middle Ordovician epoch, Floian age, Early Ordovician epoch, Dapingian age
• Ordovician of Britain: Fennian age, Whitlandian age, Migneintian age, Tremadoc epoch, Arenig epoch, Abereiddian age, Early Llanvirn age, Llanvirn epoch, Moridunian age
• Ordovician of the Baltic: Langevoja age, Vaana age, Oeland epoch, Hunderum age, Billingen age, Hunneberg age, Kunda age, Volkhov age, Saka age, Valaste age, Latorp age
• Ordovician of Ibero-Bohemia: Oretanian age, Klabava age, Arenigian age, Sarka age
• Ordovician of Australia: Chewtonian age, Lancefieldian age, Bendigonian age, Castlemainian age, Yapeenian age
• Ordovician of China: Yiyangian age, Dawan age, Daobaowan age, Xinchangian age, Hunjiang age
• Ordovician of North America: Jeffersonian age, Marmor age, Whiterockian epoch, Cassinian age, Canadian age, Rangerian age, Blackhillsian age, Tulean age, Ibexian epoch, Gasconadian age, Chazyan age
• Cambrian of Kazakhstan: Ungurian age

This interval is no longer in current use

This interval is used in the definition of 20 collections

A total of 3103 collections with 15295 occurrences lie within this time span