Cambrian Epochs
The interval definitions in this timescale are derived from the following sources:
- F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view
- F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 view
- 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
- B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 view
There are 12 timescales which overlap this one. show
Interval boundaries marked with * 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.
Interval names marked with † are no longer in current use.
This timescale is used in the definition of 594 collections
| International Chronostratigraphic Timescale | Cambrian Epochs | Cambrian of Australia | Ordovician of Britain | Cambrian of Kazakhstan | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Ordovician | Late Ordovician | Hirnantian | Ashgill | Hirnantian | 443.8 | |||||
| Katian | Rawtheyan | 445.2 | ||||||||
| Cautleyan | 448.9 * | |||||||||
| Pusgillian | 449.3 * | |||||||||
| Caradoc | Streffordian | Onnian † | 449.6 * | |||||||
| Cheneyan | 451.5 * | |||||||||
| Burrellian | 452.7 * | |||||||||
| Sandbian | 453 | |||||||||
| Actonian † | 453.2 * | |||||||||
| Marshbrookian † | Woolstonian † | 454.2 * | ||||||||
| Longvillian † | 455.2 * | |||||||||
| Aurelucian | 456.8 * | |||||||||
| Soudleyan †/Harnagian/Costonian | 457.4 * | |||||||||
| Middle Ordovician | Darriwilian | Llanvirn | Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn | 458.4 | ||||||
| Abereiddian/Early Llanvirn | 461.3 * | |||||||||
| Dapingian | 467.3 | |||||||||
| Arenig | Fennian | 468.4 * | ||||||||
| Early Ordovician | Floian | 470 | ||||||||
| Whitlandian | 471.1 * | |||||||||
| Moridunian | 474.3 * | |||||||||
| Tremadocian | Tremadoc | Migneintian | Ungurian | 477.7 | ||||||
| Cressagian | 480.8 * | |||||||||
| 485 * | ||||||||||
| Cambrian | Furongian | Stage 10 | Late Cambrian | Datsonian | Batyrbaian | 485.4 | ||||
| Payntonian | 486.8 * | |||||||||
| Jiangshanian | Iverian | 489.5 | ||||||||
| Aksaian | 490.7 * | |||||||||
| Sakian | 492.2 * | |||||||||
| Paibian | Idamean | 494 | ||||||||
| Miaolingian | Guzhangian | Middle Cambrian | Mindyallan | Ayusokkanian | 497 | |||||
| Boomerangian | 499 | |||||||||
| 499.5 | ||||||||||
| Drumian | Undillan | Zhanaarykian | 500.5 | |||||||
| Floran | Tuesaian | 503 | ||||||||
| Wuliuan | Templetonian | 504.5 | ||||||||
| 505.3 | ||||||||||
| Ordian | 507.8 * | |||||||||
| Series 2 | Stage 4 | Early Cambrian | 509 | |||||||
| Toyonian | 510 * | |||||||||
| 510.8 * | ||||||||||
| Botomian | 512.5 * | |||||||||
| Stage 3 | 514 | |||||||||
| Atdabanian | 515.6 * | |||||||||
| Terreneuvian | Stage 2 | Tommotian | 521 | |||||||
| 525.5 | ||||||||||
| Fortunian | 529 | |||||||||
| 538.8 | ||||||||||