| Computer Code: |
BALGH |
Preferred Map Code: |
notEntered |
| Status Code: |
Full |
| Age range: |
Devensian Stage (QD)
— Holocene Epoch (QH) |
| Lithological Description: |
Gravel-dominated sequences forming mountain front alluvial fans, commonly cryoturbated. |
| Definition of Lower Boundary: |
Generally alluvial fan gravels of the Ballaugh Formation unconformably overlie mixed sequence of the Orrisdale Formation [qv] (though some fan gravels interdigitate with deposits of the Orrisdale Formation). In other exposures the fan gravels overlie Lateglacial organic sediments of the Glen Balleira Formation. |
| Definition of Upper Boundary: |
Usually the ground surface. |
| Thickness: |
Unrecorded but diagrams suggest >20m thick locally. |
| Geographical Limits: |
Northern part of the Isle of Man (50k sheets 36 and possibly 46). |
| Parent Unit: |
Isle of Man Catchments Subgroup (IMCA)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
Ballaugh area, northwest part of the Isle of Man. Chadwick, R A, et al. (2001). |
| Reference(s): |
| 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. |
| 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. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E400
|
