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): |
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). |
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). |
1:50K maps on which the lithostratigraphical unit is found, and map code used: |
S011
E012
E023
E014
S006
S006
E013
|