Computer Code: |
TDCO |
Preferred Map Code: |
TDC |
Status Code: |
Full |
Age range: |
Early Devonian Epoch (DL)
— Early Devonian Epoch (DL) |
Lithological Description: |
A poorly sorted, coarse conglomerate, with cobble-sized clasts of vein quartz and quartzite. |
Definition of Lower Boundary: |
A sharp, diachronous contact with poorly sorted mudstones and sandstones of the undivided Cromlix Mudstone Formation. |
Definition of Upper Boundary: |
A transitional, diachronous contact with sandstones and pebbly sandstones of the Teith Sandstone Formation. |
Thickness: |
Measured as 110 m thick near Tom Dubh [NN 64 09], 300m north of Port of Menteith. |
Geographical Limits: |
The north-west limb of the Strathmore Syncline, between Lake of Menteith and Meall Leathan Dhail [NN 667 117]. |
Parent Unit: |
Cromlix Mudstone Formation (CXF)
|
Previous Name(s): |
none recorded or not applicable
|
Alternative Name(s): |
none recorded or not applicable
|
Stratotypes: |
Reference Section |
Crags above tributary of Redrock Burn, 400m east of Beinn Dearg. |
Type Section |
Trackside cutting 400m north of Bridge of Brackland. |
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. 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. |
1:50K maps on which the lithostratigraphical unit is found, and map code used: |
S038
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