The BGS Lexicon of Named Rock Units — Result Details
Cwm Yr Aethnen Mudstones Formation
| Computer Code: | CYA | Preferred Map Code: | Cya |
|---|---|---|---|
| Status Code: | Pending Upgrade | ||
| Age range: | Llandovery Epoch (SL) — Llandovery Epoch (SL) | ||
| Lithological Description: | Dark blue mudstones and laminated siltstones. | ||
| Definition of Lower Boundary: | Not defined. | ||
| Definition of Upper Boundary: | Not defined. | ||
| Thickness: | 0 to 150m | ||
| Geographical Limits: | Not defined. | ||
| Parent Unit: | Not Available (!) | ||
| Previous Name(s): | Cwm Yr Aethnen Mudstones [Obsolete Name and Code: Use CYA]
(-2733)
Cwm Yr Aethnen Shales [Obsolete Name and Code: Use CYA] (-2734) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| none recorded or not applicable | |||
| Reference(s): | |||
| Bassett, D A, Whittington, H B, and Williams, A. 1966. The stratigraphy of the Bala district, Merionethshire. Quarterly Journal of the Geological Society of London, Vol. 122, 219-271. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E120 E136 | |||