| Computer Code: |
BOGR |
Preferred Map Code: |
BG |
| Status Code: |
Full |
| Age range: |
Devensian Stage (QD)
— Devensian Stage (QD) |
| Lithological Description: |
Sand and gravel, coarsening-upwards deltaic sequence, containing sparse cobbles of Inchbae granite-gneiss. |
| Definition of Lower Boundary: |
Unseen, probably gradational with Ardersier Silts Formation below. |
| Definition of Upper Boundary: |
Unconformable, with (Late Devensian) raised beach gravels above. |
| Thickness: |
20m (+) |
| Geographical Limits: |
Alturlie Peninsula, 6km eastnortheast of Inverness. |
| Parent Unit: |
Alturlie Gravels Formation (ALGR)
|
| Previous Name(s): |
Glacial sand and gravel [Obsolete Name and Code]
(GSG)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
Bothyhill Gravel Pit, Alturlie Point. |
| Reference(s): |
| Merritt, J W, 1990. New evidence for ?glaciomarine deltaic deposits at Alturie Gravel Pit. 102-105 in Auton, C A, Firth, C R and Merritt, J W. Beauly to Nairn: Field Guide. Quaternary Research Association, Cambridge. |
| Fletcher, T P et al. 1996. Geology of the Fortrose and eastern Inverness district. Memoir of the British Geological Survey, Sheet 84W (Scotland). |
| Merrit, J W, Auton, C A, and Firth. C R. 1995. Ice-proximal glaciomarine sedimentation and sea-level change in the Inverness area, Scotland: A review of the deglaciation of a major ice stream of the British Late Devensian ice sheet. Quaternary Science Reviews, Vol.14, 289-329. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S084
|
