| Computer Code: |
DBTI |
Preferred Map Code: |
notEntered |
| Status Code: |
Full |
| Age range: |
Devensian Stage (QD)
— Devensian Stage (QD) |
| Lithological Description: |
Dusky red stiff plastic silty and clayey diamicton with well dispersed sand grains and angular clasts (up to 30mm) of Borrowdale Volcanic Group rocks, Skiddaw Group siltstones and sandstones; some granite, red and white sandstone; sparse shell fragments. Rip-up clasts of underlying units common. |
| Definition of Lower Boundary: |
Generally planar subhorizontal unconformity generally on the Kirkland Wood Sand and Gravel Member of the Gosforth Glacigenic Formation. |
| Definition of Upper Boundary: |
Overlain by the erosional base of the Drigg Holm Sand Member of the Gosforth Glacigenic Formation and by Holocene peat in a hollow on the foreshore at Barn Scar. |
| Thickness: |
1.07m thick at its type section. |
| Geographical Limits: |
1:50k Sheet 37 Gosforth, Drigg area, Western Cumbria. |
| Parent Unit: |
Gosforth Glacigenic Formation (GOGL)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
BNFL Drigg Offsite Borehole E, from 9.31 to 10.38m depth, sited at back of sea cliff behind Drigg beach, c.1.5km westsouthwest of Drigg village, Cumbria. Nirex Science Report SA/97/045 (Issue 2.0) 1997. |
| Partial Type Section |
BNFL Drigg Offsite Borehole C from 2.0-10.6m depth, 1.2km southwest of Drigg village, Cumbria. Nirex Science Report SA/97/045 (Issue 2.0) 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.] |
| 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 |
| Auton, C A, and Merritt, J W. 2004. Geological summary report: A review of onshore evidence of late glacial and Holocene sea level change in the St Bees-Sellafield area. British Geological Survey Report EE03_0870 for Halcrow H and S Limited. 49pp. |
| Trotter, F M, Hollingworth, S E, Eastwood T and Rose, W C C. 1937. Gosforth District. Geological Survey Memoir, England and Wales, Sheet 37. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
| none recorded or not applicable |
