| Computer Code: |
MOT |
Preferred Map Code: |
notEntered |
| Status Code: |
Full |
| Age range: |
Caradoc Series (O4)
— Caradoc Series (O4) |
| Lithological Description: |
Basaltic tuff. |
| Definition of Lower Boundary: |
Conformable within the upper part of the Nant Ffrancon Subgroup. |
| Definition of Upper Boundary: |
Conformable within the upper part of the Nant Ffrancon Subgroup. |
| Thickness: |
To 165m |
| Geographical Limits: |
none recorded or not applicable
|
| Parent Unit: |
Nant Ffrancon Subgroup (NFR)
|
| Previous Name(s): |
Moelfre Tuff Member [Obsolete Name and Code: Use MOT]
(-2944)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| none recorded or not applicable |
| Reference(s): |
| British Geological Survey. 1989. Llandudno. England and Wales. Sheet 94. Solid and Drift Geology. 1:50 000 Series. (Keyworth, Nottingham: British Geological Survey.) |
| Rushton, A W A and Howells, M F. 1998. Stratigraphical framework for the Ordovician of Snowdonia and the Lleyn Peninsula. British Geological Survey Research Report, RR/99/08. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E094
|
