In the geologic timescale, the Gorstian is the age of the Ludlow epoch of the Silurian period of the Paleozoic era of the Phanerozoic eon that is comprehended between 422.9 ± 2.5 Ma and 421.3 ± 2.6 Ma (million years ago), approximately. The Gorstian age succeeds the Homerian age and precedes the Ludfordian age.
| Silurian period | |||
|---|---|---|---|
| Llandovery | Wenlock | Ludlow | Pridoli |
| Rhuddanian | Aeronian Telychian |
Sheinwoodian | Homerian | Gorstian | Ludfordian | |
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