| Computer Code: |
LDD |
Preferred Map Code: |
LDD |
| Status Code: |
Full |
| Age range: |
Asbian Substage (CR)
— Brigantian Substage (CX) |
| Lithological Description: |
[Obsolete: use YORE]
Sandstones, siltstones, mudstones, coals, limestones. |
| Definition of Lower Boundary: |
Base of Dinwoodie Beds. |
| Definition of Upper Boundary: |
Base of Catsbit Limestone. |
| Thickness: |
536m |
| Geographical Limits: |
Unknown at present beyond Northumberland Trough and Solway Basin. |
| Parent Unit: |
none recorded or not applicable
|
| Previous Name(s): |
Previously comprised Lower and Upper Liddesdale Group [Obsolete Name and Code: Use LDD]
(-357)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
No stratotypes were defined in original descriptions in Langholm memoir. |
| Reference(s): |
| George, T N, Johnson, G A L, Mitchell, M, Prentice, J E, Ramsbottam, W H C, Sevastopulo, G D, and Wilson, R B. 1976. A correlation of the Dinantian rocks of the British Isles. Special Report of the Geological Society of London, No. 7. |
| Day, J B W, and others. 1970. Geology of the neighbourhood around Bewcastle. Memoir of the British Geological Survey, Sheet 12. (England and Wales). |
| Lumsden G I, Tulloch W, Howells M F and Davies A. 1967. The geology of the neighbourhood of Langholm. Memoir of the Geological Survey, Sheet 11 (Scotland). |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S011
E012
E023
E014
S006
S006
E013
|
