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
|