| Computer Code: |
WGGV |
Preferred Map Code: |
notEntered |
| Status Code: |
Full |
| Age range: |
Devensian Stage (QD)
— Devensian Stage (QD) |
| Lithological Description: |
Poorly sorted boulder and cobble gravel, matrix-rich, with poorly developed sub-horizontal stratification and thin interbeds of brown silt and red silty diamicton present in some exposures. Clasts are generally angular to subrounded and comprise locally derived igneous rocks from the Borrowdale Volcanic Group and metamorphic rocks. The gravel forms narrow kame terraces within the Bleng Valley area. |
| Definition of Lower Boundary: |
Erosional contact on the Scale Beck Till Member or the Bark Butts Silt Member of the Blengdale Glacigenic Formation. |
| Definition of Upper Boundary: |
Generally the ground surface, but locally overlain by Holocene alluvium of the Ehen Alluvial Formation or peat of the Blelham Peat Formation. |
| Thickness: |
0.9-1.4m |
| Geographical Limits: |
1:50k Sheet 37 (Gosforth), but could be applied to kame terrace gravels of the Central Cumbria Glacigenic Subgroup throughout western Cumbria. |
| Parent Unit: |
Blengdale Glacigenic Formation (BLGL)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
Exposure (Log NY00NE CA699) on southern bank of Scale Beck (A westward flowing tributary of River Bleng), 50m upstream of Bleng Bridge, c.1.5km nortnortheast of Gosforth, west Cumbria. Nirex Science Report 768. 1995. |
| Reference Section |
Face and BGS trial pit NY00NE CA705 in a small gravel pit at Bark Butts, in the valley of the River Bleng, c.3km upstream northnortheast of Gosforth, west 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 |
| Merritt, J W, Auton, C A, Browne, M A E, Neilson, G and McMillan, A A. 1995. Characterisation of the onshore Quaternary deposits around Sellafield, Cumbria, Phase II. Nirex Science Report 768. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
| none recorded or not applicable |
