| Group | |
| Type: | Group |
| Age: | Silurian |
| Prilithology: | lava flows |
| Otherlithology: | breccias, conglomerates, quartzitess, clay rocks |
| Namedfor: | Skomer island |
| Region: | West Wales |
| Country: | Wales |
| Underlies: | upper Llandovery shales and sandstone |
| Overlies: | Ordovician rocks |
| Thickness: | about 1000m |
| Extent: | Skomer and adjacent parts of mainland Wales |
The Skomer Volcanic Group is a Silurian lithostratigraphic group (a sequence of rock strata) in Pembrokeshire, Wales. The name is derived from the island of Skomer off the west coast of Pembrokeshire. It was traditionally known as the Skomer Volcanic Series. The rocks are exposed across the island of Skomer and along the northern half of the nearby Marloes peninsula as far east as St Ishmaels.[1] [2]
The Group comprises around 1000m thickness of lava flows and associated strata including felsite, albite-trachyte, keratophyre etc laid down during the Silurian Period.[3]