The BGS Lexicon of Named Rock Units — Result Details

Liddesdale Group [Obsolete Name And Code: Use YORE]

Computer Code: LDD Preferred Map Code: LDD
Status Code: Index Level
Age range: Asbian Substage (CR) — Brigantian Substage (CX)
Lithological Description: 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: Not Applicable (-)
Previous Name(s): Previously Comprised Lower And Upper Liddesdale Group (-357)
Alternative Name(s): none recorded or not applicable
Type Area  No Stratotypes were defined in original descriptions in Langholm memoir. 
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). 
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. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E013 S011 E012 E023 E014 S006 S006