| Computer Code: |
DGTI |
Preferred Map Code: |
DG |
| Status Code: |
Full |
| Age range: |
Wolstonian Stage (QO)
— Wolstonian Stage (QO) |
| Lithological Description: |
Stony, sandy silty clay diamicton, reddish brown, extremely compact, with clasts mainly of welded tuff, greywacke and slate and granite derived from the western Lake District, together with red (Permian) and yellow (Carboniferous) sandstone and coal from West Cumbria, and sparse granodiorite from Scotland. |
| Definition of Lower Boundary: |
Sharp, irregular, uncomformable contact with bedrock (mostly sandstone of the Sherwood Sandstone Group). |
| Definition of Upper Boundary: |
Sharp, gently undulating, unconformable contact with laminated silt and clay of the Stubble Green Silt Member of the Glannoventia Formation, or sharp, planar, unconformable contact with sandy clay diamicton of the Holmrook Till Member of the Blengdale Glacigenic Formation. |
| Thickness: |
5m |
| Geographical Limits: |
Drigg area and Lower Wasdale, West Cumbria. |
| Parent Unit: |
Irish Sea Coast (Albion) Glacigenic Subgroup (ISCAG)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Reference Section |
Nirex Borehole 10C, 20.4 to 17.3m depth. Nirex 1997 |
| Type Section |
Commercial borehole drilled at the Drigg landfill site, BNFL Off-site Borehole D, 43.2 to 37.6m 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. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
| none recorded or not applicable |
