| Computer Code: |
LCTI |
Preferred Map Code: |
LCT |
| Status Code: |
Full |
| Age range: |
Devensian Stage (QD)
— Devensian Stage (QD) |
| Lithological Description: |
Reddish brown, gravelly sandy silty clay diamicton, massive, matrix-supported, very compact, containing angular to subrounded clasts up to boulder size of red sandstone, with some granite, granophyre, yellow sandstone, mudstone, limestone, Borrowdale Volcanic Group lithologies (rhyolite, welded tuff), greywacke sandstone and siltstone. Has well developed clast fabric and fissility typical of lodgement tills. |
| Definition of Lower Boundary: |
Sharp, irregular, unconformable contact with bedrock. |
| Definition of Upper Boundary: |
Ground surface or commonly a sharp, undulating, unconformable contact with sand and gravel of the St Bees Sand and Gravel Member of the Seascale Glacigenic Formation. |
| Thickness: |
To 5m |
| Geographical Limits: |
Coast of Cumbria between Whitehaven and Sellafield. |
| Parent Unit: |
Seascale Glacigenic Formation (SEAG)
|
| Previous Name(s): |
Lowca Till [Obsolete Name and Code: Use LCTI]
(-4151)
|
| Alternative Name(s): |
Selker Till
|
| Stratotypes: |
| Type Section |
Sea cliff section of NX91SEME14 at Gutter Foot, north of St Bees Beach, Cumbria. 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.] |
| Bowen, D Q. 1999. A revised correlation of Quaternary deposits in the British Isles. Geological Society Special Report, No. 23. |
| 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. |
| Eastwood T, and others. 1968. Geology of the country around Whitehaven. Memoir of the Geological Survey of Great Britain, Sheet 28 (England and Wales). |
| Huddart, D and Tooley, M J. 1972. The Cumberland Lowland field trip handbook. [Cambridge: Quaternary Research Association.] |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
| none recorded or not applicable |
