This article relies largely or entirely on a single source .(January 2026) |
| Builth Volcanic | |
|---|---|
| Stratigraphic range: Ordovician | |
| Type | Formation |
| Location | |
| Region | Wales |
| Country | United Kingdom |
The Builth Volcanic is a geologic formation in Wales. It preserves fossils dating back to the Ordovician period.