| Computer Code: |
CCCO |
Preferred Map Code: |
CCC |
| Status Code: |
Full |
| Age range: |
Early Devonian Epoch (DL)
— Early Devonian Epoch (DL) |
| Lithological Description: |
A poorly sorted, matrix supported, typically well bedded (planar) conglomerate with coarse clasts which are commonly sub-angular to angular. |
| Definition of Lower Boundary: |
A sharp contact with fine- to medium-grained lithic sandstones of the (undivided) Ruchill Flagstone Formation, but near Gartmore, the Conglomerate is underlain by a red silty mudstone. |
| Definition of Upper Boundary: |
A gradational contact with an overlying reddish grey, coarse- to fine-grained, locally pebbly, and commonly massive sandstone, of the undivided Ruchill Flagstone Formation. |
| Thickness: |
Up to 150 m thick at Callander, 50m at Beinn Liath [NN 578 040], and 2 m near Gartmore. |
| Geographical Limits: |
The north-west limb of the Strathmore Syncline, from Kelty Water near Corrie, to Meall Leathan Dhail, and possibly to Auchnashelloch Hill (although disputed by Francis, E H et al, 1970). |
| Parent Unit: |
Ruchill Flagstone Formation (RLF)
|
| Previous Name(s): |
Callander Craig Conglomerate [Obsolete Name and Code: Use CCCO]
(-2061)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
Ridge known as Callander Craig, at Callander. |
| Type Section |
Keltie Water, 1200m above Bridge of Brackland, near Callander. |
| Reference Section |
Hillock near ruin of Spittal Farm, near Gartmore. |
| Reference(s): |
| Phillips, E R, and Aitken, A M. 1998. The petrology and composition of the Lower Old Red Sandstone exposed in the Aberfoyle Area (Sheet 38E), Central Scotland. British Geological Survey, Technical Report, WG/98/10. |
| Browne, M A E, Smith, R A, and Aitken, A M. 2002. Stratigraphical framework for the Devonian (Old Red Sandstone) rocks of Scotland south of a line from Fort William to Aberdeen. British Geological Survey Research Report RR/01/04. 67 pp. |
| 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). |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S038
|
