| Computer Code: |
GCBTI |
Preferred Map Code: |
Gc |
| Status Code: |
Full |
| Age range: |
Devensian Stage (QD)
— Devensian Stage (QD) |
| Lithological Description: |
Extremely compact, reddish-brown, stony silty sandy clay diamicton containing clasts of red sandstone and Scottish rock types (granodiorite, granite, greywacke) in addition to Lake District volcanoclastic rocks and Carboniferous rocks. |
| Definition of Lower Boundary: |
Uneven, unconformable on bedrock. |
| Definition of Upper Boundary: |
Unconformable, planar or uneven. At the Type Section there are rip-up clasts of Gillcambon Till within the overlying grey diamicton of the Greystoke Till Formation. |
| Thickness: |
To 5m |
| Geographical Limits: |
The Vale of Eden and the southern Solway Lowlands. |
| Parent Unit: |
Irish Sea Coast Glacigenic Subgroup (ISCG)
|
| Previous Name(s): |
Till Of "Early Scottish Glaciation"
(-921)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
West bank of Gillcambon Beck, 275m above the road bridge. Eastwood et al. 1969. |
| Reference(s): |
| Trotter, F M. 1929. The glaciation of the Eastern Edenside, the Alston Block, and the Carlisle Plain. Quarterly Journal of the Geological Society of London, Vol.85, 549-612. |
| Trotter, F M and Hollingworth, S E, 1932. The glacial sequence in the North of England. Geological Magazine, Vol.69, 374-380. |
| Eastwood, T, Hollingworth, S E, Rose, W C C, and Trotter, F M. 1968. Geology of the country around Cockermouth and Caldbeck. Memoir of the Geological Survey of Great Britain, England and Wales, Sheet 23. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
| none recorded or not applicable |
