| 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: |
| Type Section |
BGS registered borehole SD19NW/12 [Aikbank Farm Borehole 2], from 1.5 to 57.8m depth. Nirex, 1997. |
| Reference Section |
BGS registered borehole SD19NW/11 [Aikbank Farm Borehole 1], from 1.06 to 49.17m 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 |
