| Computer Code: |
CWGOT |
Preferred Map Code: |
notEntered |
| Status Code: |
Full |
| Age range: |
Caradoc Series (O4)
— Caradoc Series (O4) |
| Lithological Description: |
Poorly sorted, heterolithic, felsic tuff with clasts of rhyolite, tuff and sedimentary rocks, interbedded with volcaniclastic sandstones and siltstones. |
| Definition of Lower Boundary: |
Conformably overlies silty mudstones of the Nant Ffrancon Subgroup. |
| Definition of Upper Boundary: |
Conformably overlain by sandstones of the Cwm Eigiau Formation. |
| Thickness: |
15m |
| Geographical Limits: |
Central Snowdonia. |
| Parent Unit: |
Cwm Eigiau Formation (CEI)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
Capel Curig Volcanic Formation
|
| Stratotypes: |
| Type Area |
To the west of Dolwyddelan. Howells, M F and Smith, M. 1997. |
| Reference(s): |
| Howells, M F and Smith, M. 1997. Geology of the country around Snowdon. Memoir of the British Geological Survey, Sheet 119 (England and Wales). (London: The Stationery Office). 104pp. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
| none recorded or not applicable |
