| Computer Code: |
MTMB |
Preferred Map Code: |
notEntered |
| Status Code: |
Index Level |
| Age range: |
Duckmantian Substage (CB)
— Duckmantian Substage (CB) |
| Lithological Description: |
Shelly mudstone. |
| 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: |
Pennine Middle Coal Measures Formation (PMCM)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| none recorded or not applicable |
| Reference(s): |
| Ramsbottom, W H C, Calver, M A, Eagar, R M C, Hodson, F, Holliday, D W, Stubblefield, C J and Wilson, R B. 1978. A correlation of the Silesian rocks in the British Isles. Geological Society of London, Special Report No.10. |
| Dean, M T, Browne, M A E, Waters, C N, and Powell, J H. 2011. A lithostratigraphical framework for the Carboniferous successions of northern Great Britain (onshore). British Geological Survey Research Report RR/10/007. 165 pp. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E246
E087
E154
E021
E010
E014
E020
E026
E015
E027
E078
E142
E167
|
