The BGS Lexicon of Named Rock Units — Result Details

Lunan Clay Member

Computer Code: LCL Preferred Map Code: notEntered
Status Code: Full
Age range: Devensian Stage (QD) — Devensian Stage (QD)
Lithological Description: Red plastic clay, typically laminated, with laminae of very fine-grained micaceous sand, locally with rhythmic, 2-3cm-thick cyclopels, thin beds of interlaminated fine- and medium-grained sand, sparse boulders and discoid calcareous concretions towards the base. Becoming more interbedded with sand inland. AMS radiocarbon dates of 17,065 and 17,720 ka BP on marine microfauna reported by McCabe et al (2007).
Definition of Lower Boundary: Sharp conformable contact with gravel recorded by Rice (1960) at the former Anniston Brickworks.
Definition of Upper Boundary: Apparently sharp, unconformable contact at no higher than 23m OD with overlying glaciofluvial gravel of the Drumlithie Sand and Gravel Formation.
Thickness: To 11m proved
Geographical Limits: Lower reaches of the Lunan and Brothock valleys, Angus, and possibly in northeast Fife.
Parent Unit: Errol Clay Formation (ERRCL)
Previous Name(s): Brickclay (-4149)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Partial Type Section  Sections in the former Anniston Brickpit. Rice, 1960 
Reference(s):
Rice, R J. 1960. The glacial deposits of the Lunan and Brothock valleys in southeastern Angus. Transactions of the Geological Society of Edinburgh, Vol.17, 241-259. 
McCabe, A M, Clark, P U, Smith, D E and Dunlop, P. 2007. A revised model for the last deglaciation of eastern Scotland. Journal of the Geological Society of London, Vol.164, 313-316. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable