| Computer Code: |
CTF |
Preferred Map Code: |
notEntered |
| Status Code: |
Index Level |
| Age range: |
Holkerian Substage (CQ)
— Brigantian Substage (CX) |
| Lithological Description: |
[Obsolete: use BPLM] |
| Definition of Lower Boundary: |
none recorded or not applicable
|
| Definition of Upper Boundary: |
none recorded or not applicable
|
| Thickness: |
none recorded or not applicable
|
| Geographical Limits: |
none recorded or not applicable
|
| Parent Unit: |
none recorded or not applicable
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| none recorded or not applicable |
| Reference(s): |
| Swarbrick, E E. 1962. Facies changes in the Chert Formation of the Lower Culm Series of the Bampton area, north Devon. Proceedings of the Ussher Society, Vol 1, 30-31. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
| none recorded or not applicable |
