| Menevian Group | |
|---|---|
| Stratigraphic range: St Davids Epoch Cambrian | |
 Mudstones of the Menevia Formation exposed in Porth y Rhaw, west of Solva | |
| Type | Group |
| Sub-units | Upper, Middle, Lower (informal) |
| Underlies | Lingula Flags |
| Overlies | Solva Group |
| Thickness | about 230m |
| Lithology | |
| Primary | mudstones |
| Other | tuffaceous sandstone |
| Location | |
| Region | South West Wales |
| Country | Wales |
| Type section | |
| Named for | St Davids (Roman name for area) |
The Menevian Group is a Cambrian lithostratigraphic group (a sequence of rock strata) in west Wales. The name is derived from Menevia, the Roman name for the St Davids area north of St Brides Bay on Pembrokeshire’s west coast where the strata are well exposed in coastal cliffs. This rock succession has previously been known variously as the Menevian Series and Menevian Beds and largely ascribed to the British regional stratigraphic unit St David’s Epoch, though these terms are now obsolete.[1]
- ^ "Menevian Group". The BGS Lexicon of Named Rock Units. British Geological Survey. Retrieved Oct 11, 2013.