509 - 497 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

There are intervals in 9 timescales which overlap this one. show

• International Chronostratigraphic Timescale: Wuliuan age, Drumian age, Guzhangian age, Miaolingian epoch
• Obsolete Names for ICS Units: Stage 5 age, Series 3 epoch
• Cambrian Epochs: Middle Cambrian epoch
• Cambrian of China: Wangcunian age, Taijangian age
• Cambrian of Australia: Boomerangian age, Floran age, Mindyallan age, Templetonian age, Undillan age, Ordian age
• Cambrian of Siberia: Amgan age, Menevian age, Ayusokkanian age, Solvan age, Mayan age
• Cambrian of Kazakhstan: Tuesaian age, Zhanaarykian age
• Cambrian of North America: Delamaran age, Marjumian age, Topazan age, Albertian age
• Cambrian of West Avalonia: Arcadian age

This interval is used in the definition of 164 collections

A total of 2359 collections with 13696 occurrences lie within this time span