The BGS Lexicon of Named Rock Units — Result Details

Aikbank Farm Glacigenic Formation

Computer Code: AIK Preferred Map Code: AIK
Status Code: Full
Age range: Devensian Stage (QD) — Devensian Stage (QD)
Lithological Description: Rhythmically laminated silt and clay [Whinneyhill Coppice Clay Member], overlain by pebbly silty clay diamicton and sand [Green Croft Till Member], overlain by laminated clay and silt [Holmeside Clay Member], overlain by coarsening-upwards sequences of sand and gravel [Mainsgate Wood Sand and Gravel Member].
Definition of Lower Boundary: Sharp, undulating, unconformable contact with pale red stony clay diamicton and cobble gravel of the HolmrookTill Member of the Blengdale Glacigenic Formation.
Definition of Upper Boundary: Either not overlain, or partially overlain by Flandrian peat or alluvial deposits.
Thickness: To 60m
Geographical Limits: Lower Wasdale, West Cumbria, inland of the limit of ice of the Irish Sea Ice Stream during the "Gosforth Oscillation"
Parent Unit: Irish Sea Coast Glacigenic Subgroup (ISCG)
Previous Name(s): none recorded or not applicable
Alternative Name(s): Proglacial Lacustrine Sequence In Lower Wasdale
Stratotypes:
Reference Section  BGS registered borehole SD19NW/11 [Aikbank Farm Borehole 1], from 1.06 to 49.17m depth Nirex, 1997. 
Type Section  BGS registered borehole SD19NW/12 [Aikbank Farm Borehole 2], from 1.5 to 57.8m depth. Nirex, 1997. 
Reference(s):
Merritt, J W and Auton, C A. 1997. Quaternary lithostratigraphy of the Sellafield district. Nirex Science Report SA/97/045 (Issue 2.0). [Report prepared for UK Nirex Ltd. 69pp, 5 tables, 20 figures, 14 enclosures and one appendix.] 
Trotter, F M, Hollingworth, S E, Eastwood T and Rose, W C C. 1937. Gosforth District. Geological Survey Memoir, England and Wales, Sheet 37. 
Merrit, J W and Auton, C A. 2000. An outline of the lithostratigraphy and depositional history of Quaternary deposits in the Sellafield district, west Cumbria. Proceedings of the Yorkshire Geological Society, Vol.53, 129-154 
Akhurst, M C, Chadwick, R A, Holliday, D W, McCormac, M, McMillan, A A, Millward, D, Young, B, Ambrose, K, Auton, C A, Barclay, W J, Barnes, R P, Beddoe-Stephens, B, James, J C W, Johnson, H, Jones, N S, Glover, B W, Hawkins, M P, Kimbell, G S, MacPherson, K A T, Merritt, J W, Milodowski, A E, Riley, N J, Robins, N S, Stone, P and Wingfield, R T R. 1997. The geology of the west Cumbria district. Memoir of the British Geological Survey, Sheets 28, 37 and 47 (England and Wales). 138pp. 
Huddart, D. 1991. The glacial history and glacial deposits of the north and west Cumbrian lowlands, 151-167 in Ehlers, J, Gibbard, P L and Rose, J (editors), Glacial deposits in Great Britain and Ireland. [London: Balkema.] 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable