Computer Code: |
BUCS |
Preferred Map Code: |
BUS |
Status Code: |
Full |
Age range: |
Early Devonian Epoch (DL)
— Early Devonian Epoch (DL) |
Lithological Description: |
A reddish grey, fine- to medium-grained, commonly cross-bedded sandstone, interbedded with siltstone and chocolate brown to brick red, silty mudstone. |
Definition of Lower Boundary: |
A gradational contact with the Dalmary Sandstone Member of the Teith Sandstone Formation, which is generally greenish grey and commonly contains plant remains. |
Definition of Upper Boundary: |
The top is not seen, as it is faulted against and unconformably overlain by the basal conglomerate and sandstones of the Stockiemuir Sandstone Formation, of the Upper Devonian, Stratheden Group. |
Thickness: |
At least 400 m thick. |
Geographical Limits: |
The axial region of the Strathmore Syncline between Thornhill and Gartocharn. |
Parent Unit: |
Teith Sandstone Formation (THF)
|
Previous Name(s): |
Upper Purple Sandstone Facies
(-94)
|
Alternative Name(s): |
none recorded or not applicable
|
Stratotypes: |
Reference Section |
Ballochneck Burn between Ballochneck and Upper Ballaird. |
Partial Type Section |
Arngibbon Glen from A811 road bridge near Garden to Badenkep Farm. |
Reference Section |
Purely Burn between Greenburn and Park of Auchentroig. |
Reference(s): |
Francis, E H, Forsyth, I H, Read, W A and Armstrong, M. 1970. The geology of the Stirling district. Memoir of the Geological Survey of Great Britain, Sheet 39 (Scotland). |
Browne, M A E, Smith, R A and Aitken, A M. 2001. A lithostratigraphical framework for the Devonian (Old Red Sandstone) rocks of Scotland south of a line from Fort William to Aberdeen. Version 3. British Geological Survey Research Report RR/01/04. |
Armstrong, M, and Paterson, I B. 1970. The Lower Old Red Sandstone of the Strathmore Region. Report of the Institute of Geological Sciences No. 70/12 |
1:50K maps on which the lithostratigraphical unit is found, and map code used: |
S038
|