490.7 - 485.4 Ma

The definition of this interval in the timescale Cambrian of Siberia 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 bottom 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 9 timescales which overlap this one. show

• International Chronostratigraphic Timescale: Jiangshanian age, Furongian epoch, Stage 10 age
• Cambrian Epochs: Late Cambrian epoch
• Ordovician of the Baltic: Oeland epoch, Pakerort age
• Ordovician of North America: Skullrockian age, Ibexian epoch
• Cambrian of China: Taoyuanian age, Niuchehean age
• Cambrian of Australia: Payntonian age, Datsonian age, Iverian age
• Cambrian of Siberia: Yurakian age, Ketyan age, Tavgian age
• Cambrian of North America: Millardan age, Sunwaptan age, Dresbachian age, Franconian age
• Cambrian of Britain: Dolgellian age, Trempealeauan age

This interval is used in the definition of 27 collections

A total of 760 collections with 3930 occurrences lie within this time span