| Aberystwyth Grits Group | |
|---|---|
| Stratigraphic range: Llandovery Silurian | |
 Turbidite sandstones and interbedded mudstones of the Aberystwyth Grits Group exposed on the foreshore below Allt Wen, near Aberystwyth | |
| Type | Group |
| Sub-units | Trefechan Formation, Mynydd Bach Formation |
| Overlies | Borth Mudstones Formation |
| Lithology | |
| Primary | turbidite mudstones |
| Other | sandstones |
| Location | |
| Region | mid Wales |
| Country | Wales |
| Type section | |
| Named for | Aberystwyth |
The Aberystwyth Grits Group is a Silurian lithostratigraphic group (a sequence of rock strata) in mid Wales. The name is derived from Aberystwyth in northern Ceredigion where the strata are well exposed in coastal cliffs. The Group comprises the Trefechan Formation and the underlying Mynydd Bach Formation. The rocks of the Aberystwyth Grits Group have also previously been known as the Aberystwyth Grits Formation[1]
- ^ "Aberystwyth Grits Group". The BGS Lexicon of Named Rock Units. British Geological Survey. Retrieved May 9, 2013.