Cwmystwyth Grits Group
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| Cwmystwyth Grits Group | |
|---|---|
| Stratigraphic range: early Silurian (Llandovery) | |
| Type | Group |
| Underlies | Dolgau Mudstones Formation |
| Overlies | Claerwen Group |
| Lithology | |
| Primary | sandstones |
| Other | mudstones |
| Location | |
| Region | mid Wales |
| Country | Wales |
| Type section | |
| Named for | Cwmystwyth (village) |
The Cwmystwyth Grits Group is a Silurian lithostratigraphic group (a sequence of rock strata) in mid Wales. The name is derived from the village of Cwmystwyth near Devil's Bridge in Ceredigion. The Group comprises the Blaen Myherin Mudstones Formation, the Glanyrafon Formation (upper and lower tongues), the Caerau Mudstones Formation, the Rhuddnant Grits Formation (including the Llyn Teifi Member) and the Pysgotwr Grits Formation.[1][2]
