Niagaran age - Sheinwoodian age
International Chronostratigraphic Timescale | Silurian of North America | |||||
---|---|---|---|---|---|---|
Silurian | Pridoli | Cayugan | 419.2 | |||
Niagaran | 422.5 * | |||||
Ludlow | Ludfordian | 423 | ||||
Gorstian | 425.6 | |||||
Wenlock | Homerian | Lockportian | 427.4 | |||
Sheinwoodian | 430.5 | |||||
Llandovery | Telychian | Ontarian | 433.4 | |||
Aeronian | 438.5 | |||||
Alexandrian | 438.7 * | |||||
Medinan | Clinton | 440.1 * | ||||
440.7 * | ||||||
Rhuddanian | 440.8 | |||||
443.8 |