| Computer Code: |
SNAEF |
Preferred Map Code: |
notEntered |
| Status Code: |
Full |
| Age range: |
Devensian Stage (QD)
— Devensian Stage (QD) |
| Lithological Description: |
Head, scree and slope wash deposits, covering upland areas. These include boulder scree, and some "redeposited" gravels and diamictons. The head and scree deposits intercalate with glacigenic sediments of the Orrisdale Formation at low elevations around the island margin.
Head, scree and slope wash deposits, covering upland areas. These include boulder scree, and some 'redeposited' gravels and diamictons. The head and scree deposits intercalate with glacigenic sediments of the Orrisdale Formation at low elevations around the island margin. |
| Definition of Lower Boundary: |
Generally unconformable on bedrock, except where the head and scree deposits interdigitate with glacigenic sediments of the Orrisdale Formation. |
| Definition of Upper Boundary: |
The ground surface or overlain by Holocene fluvial and organic sediments. |
| Thickness: |
Unrecorded, probably <10m |
| Geographical Limits: |
Mainly the central uplands of the Isle of Man, but also present on low ground around the coast. (50k sheets 36, 45, 46, 56, 57). |
| Parent Unit: |
Manx Glacigenic Subgroup (MXGL)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
The valley of Druidale, 3.5km west of Snaefell, Isle of Man. Chadwick, R A. et al. 2001. |
| Reference(s): |
| Chadwick, R A, Jackson, D I, Barnes, R P, Kimbell, G S, Johnson, H, Chiverell, R C, Thomas, G S P, Jones, N S, Riley, N J, Pickett, E A, Young, B, Holliday, D W, Ball, D F, Molyneux, S G, Long, D, Power, G M and Roberts, D H. 2001. Geology of the Isle of Man and its offshore area. British Geological Survey Research Report, RR/01/06. |
| Thomas, G S P. 1999. Northern England. 91-98 in Bowen, D Q (Editor), A revised correlation of Quaternary and Neogene deposits in the British Isles. Geological Society Special Report No.23. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E400
|
