| Computer Code: |
FWTI |
Preferred Map Code: |
notEntered |
| Status Code: |
Full |
| Age range: |
Devensian Stage (QD)
— Devensian Stage (QD) |
| Lithological Description: |
Typically a hard, moderate reddish brown, matrix-supported, massive, calcareous sandy silty clay diamicton, with dispersed subangular to rounded clasts up to 15cm in diameter. The clasts are mainly of red sandstone, Borrowdale Volcanic Group rocks, granite, granophyre, brown siltstone and sandstone; some coal, black shale and comminuted shell fragments. |
| Definition of Lower Boundary: |
Generally planar or undulating contact on the Drigg Holme Sand Member of the Gosforth Glacigenic Formation. |
| Definition of Upper Boundary: |
Overlain by silts, sands and clays of the Drigg Moorside Silt Member of the Gosforth Glacigenic Formation. |
| Thickness: |
Typically c.2.5m, but up to c.5m thick. |
| Geographical Limits: |
1:50k Sheet 37 Gosforth. Seascale, Ravenglass and Lower Wasdale areas, western Cumbria. |
| Parent Unit: |
Gosforth Glacigenic Formation (GOGL)
|
| Previous Name(s): |
Upper Boulder Clay [Obsolete Name and Code: Use FWTI, GOGL, HMTI, PKSA, PLBT, RSTI, STPTG]
(-4662)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Reference Section |
Nirex Borehole QBH2a (0 - 5m depth) - BGS registered borehole SD09NE/21 (Carleton Hall). Eastern side of River Irt, c.1km south of Holmrook, west Cumbria. Nirex Science Report SA/97/045 (Issue 2.0) 1997. |
| Type Section |
River cliff section - River Irt in Fishgarth Wood, c.700m south of Holmrook, west Cumbria. Nirex Science Report SA/97/045 (Issue 2.0) 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 |
| Eastwood T, and others. 1968. Geology of the country around Whitehaven. Memoir of the Geological Survey of Great Britain, Sheet 28 (England and Wales). |
| 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.] |
| Auton, C A, Alexander, S A, Eaton, G P, McMillan, A A, Skinner, A C, and Wealthall, G P. 1997. Logging and interpretation of Quaternary boreholes (QBH) drilled in the Sellafield area during 1966. Nirex Science Report SA/97/043 (Issue 2.0). |
| 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 |
