| Computer Code: |
DLBO |
Preferred Map Code: |
DLBO |
| Status Code: |
Full |
| Age range: |
Pridoli Epoch (SO)
— Emsian Age (DE) |
| Lithological Description: |
Coarse conglomerate and subsidiary arkosic sandstone, purple-red to red-brown. Coarse breccia and breccio-conglomerate at base locally. |
| Definition of Lower Boundary: |
Base rests unconformable upon Dalradian metasedimentary rocks. |
| Definition of Upper Boundary: |
Sedimentary transition into Raebeg Sandstone Formation. |
| Thickness: |
250m+ |
| Geographical Limits: |
The Tomintoul Old Red Sandstone outlier of upper Banffshire - a 50 sq km outlier about 15 by 5km in extent, which is totally separated from other Old Red Sandstone outcrops of the northeast Grampian area. |
| Parent Unit: |
Tomintoul Group (TOMI)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
Upper crags on the northwest side of the Ailnack Gorge, Delnabo, Tomintoul. Mendum and Stephenson (In prep). |
| Reference(s): |
| Mendum, J R and Stephenson, D. In preparation. Geology of the Glenlivet and Glenbuchat district. Memoir of the British Geological Survey, Sheets 75W and 75E. (Scotland). |
| Hinxman, L W, 1896. Explanation of sheet 75, west Aberdeenshire, Banffshire, parts of Elgin and Inverness. Memoirs of the Geological Survey, Scotland. (Edinburgh: HMSO for Geological Survey). |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S075
S075
|
