| Computer Code: |
BALT |
Preferred Map Code: |
BK |
| Status Code: |
Full |
| Age range: |
Devensian Stage (QD)
— Devensian Stage (QD) |
| Lithological Description: |
Diamicton, firm, sandy and silty, moderate reddish-brown to "reddish-yellow" with abundant rounded clasts of red-brown Upper Devonian (Nairn Sandstone Formation) sandstone. |
| Definition of Lower Boundary: |
Unconformable (commonly tectonised) contact on underlying pebbly sands of the Ardersier Silts Formation or unconformable on bedrock. |
| Definition of Upper Boundary: |
Unconformable contact with overlying sands and silts of the Ardersier Silts Formation. |
| Thickness: |
To 3.2m |
| Geographical Limits: |
Outcrops in main late glacial cliff between Nairn and Kingsteps Quarry; farther eastwards on 1:50000 Sheet 84 E (Nairn). |
| Parent Unit: |
Finglack Till Formation (FINT)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
Trench section, Balmakeith Industrial Estate, Nairn. Field unit record CA 1191 (partial type section). To be shown on, 1:10000 geological maps NH 85 NE (Nairn) and NH 95 NW (Auldearn). |
| Partial Type Section |
Site Investigation Borehole (SE 9661 BH 505), 7.5 to 10.7m depth. Railway bridge improvement, Forres Road, Nairn. To be shown on 1:10000 geological maps, NH 85 NE (Nairn) and NH 95 NW (Auldearn). |
| Reference(s): |
| Fletcher, T P et al. 1996. Geology of the Fortrose and eastern Inverness district. Memoir of the British Geological Survey, Sheet 84W (Scotland). |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S084
|
