489.2 - 485.4 Ma

The definition of this interval in the timescale Cambrian of Britain 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 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: Stage 10 age, Furongian epoch
• Cambrian Epochs: Late Cambrian epoch
• Ordovician of the Baltic: Pakerort age, Oeland epoch
• Ordovician of North America: Ibexian epoch, Skullrockian age
• Cambrian of China: Taoyuanian age, Niuchehean age
• Cambrian of Australia: Datsonian age, Payntonian age
• Cambrian of Siberia: Ketyan age, Tavgian age, Batyrbaian age, Yurakian age
• Cambrian of North America: Franconian age, Sunwaptan age, Dresbachian age, Millardan age
• Cambrian of Britain: Dolgellian age

This interval is used in the definition of 234 collections

A total of 452 collections with 2252 occurrences lie within this time span