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

This interval is used in the definition of 162 collections

A total of 2061 collections with 11271 occurrences lie within this time span