Silurian of North America
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
There are 5 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.
This timescale is used in the definition of 104 collections
| International Chronostratigraphic Timescale | Silurian of North America | Silurian of the Baltic | |||||
|---|---|---|---|---|---|---|---|
| Silurian | Pridoli | Cayugan | Ohesaare | 419.2 | |||
| Kaugetuma | 421.7 * | ||||||
| Niagaran | 422.5 * | ||||||
| Ludlow | Ludfordian | Kuressaare | 423 | ||||
| Paadla | 423.4 * | ||||||
| Gorstian | 425.6 | ||||||
| Wenlock | Homerian | Lockportian | Rootsikula | 427.4 | |||
| Jaagarahu | 429.2 * | ||||||
| Sheinwoodian | 430.5 | ||||||
| Jaani | 431.8 * | ||||||
| Llandovery | Telychian | Ontarian | 433.4 | ||||
| Adavere | 434 * | ||||||
| Aeronian | 438.5 | ||||||
| Alexandrian | 438.7 * | ||||||
| Raikkula | 439.4 * | ||||||
| Medinan | Clinton | 440.1 * | |||||
| 440.7 * | |||||||
| Rhuddanian | 440.8 | ||||||
| Juuru | 441.4 * | ||||||
| 443.8 | |||||||