| Computer Code: |
WCC |
Preferred Map Code: |
WCC |
| Status Code: |
Full |
| Age range: |
Devensian Stage (QD)
— Devensian Stage (QD) |
| Lithological Description: |
Dark brown (Munsell Soil colour) clay with laminae of silt and fine-grained sand, and sparse dropstone pebbles. Rhythmic graded lamination is common. |
| Definition of Lower Boundary: |
Sharp, undulating, unconformable contact with pale red stony clay diamicton and cobble gravel of the Holmrook Till Member of the Blengdale Glacigenic Formation. |
| Definition of Upper Boundary: |
Generally sharp, planar, glacitectonic, unconformable contact with dark reddish brown pebbly silty clay diamicton of the Green Croft Till Member of the Aikbank Farm Glacigenic Formation. |
| Thickness: |
To 24.7m |
| Geographical Limits: |
Lower Wasdale, West Cumbria, inland of the limit of ice of the Irish Sea Ice Stream during the "Gosforth Oscillation". |
| Parent Unit: |
Aikbank Farm Glacigenic Formation (AIK)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Reference Section |
BGS registered borehole SD19NW11 (Aikbank Farm Borehole 1), from 35.6 to 49.17m depth. Nirex, 1997. |
| Type Section |
BGS registered borehole SD19NW12 (Aikbank Farm Borehole 2), from 33.69 to 57.8m depth. Nirex, 1997. |
| Reference(s): |
| 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 |
| 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.] |
| 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 |
