| Computer Code: |
STRU |
Preferred Map Code: |
notEntered |
| Status Code: |
Index Level |
| Age range: |
Pragian Age (DP)
— Emsian Age (DE) |
| Lithological Description: |
[Obsolete: use STIE] Lenticular conglomerates intercalated with grey and black flaggy sandstones, siltstones and mudstones. Dark grey siltstones and calcareous mudstones also occur. |
| Definition of Lower Boundary: |
Drawn at base of basal breccia - conglomerate of the Struie Group where it rests unconformably on the Moine Basement Rocks. |
| Definition of Upper Boundary: |
Drawn at unconformable upward change from siltstone and mudstone of the Struie Group to conglomerate of the Strath Rory Group. |
| Thickness: |
c. 2500m |
| Geographical Limits: |
Highlands, Scotland. |
| Parent Unit: |
none recorded or not applicable
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
Cromarty, Highlands, Scotland. |
| Type Area |
Struie Mount, Easter Ross, Highlands, Scotland. |
| Reference(s): |
| Johnstone, G S, 1989. The Northern Highlands of Scotland. British Regional Geology. p.122. |
| Mykura, W, 1983. Old Red Sandstone. "In" Craig, G Y. Geology of Scotland, 2nd. edition, Edinburgh. |
| Armstrong, M. 1977. The Old Red Sandstone of Easter Ross and the Black Isle. In Gill, G (editor). The Moray Firth area - geological studies. Inverness Field Club. |
| House, M R, Richardson, J B, Chaloner, W G, Allen, J R L, Holland, C H and Westoll, T S. 1977. A Correlation of Devonian rocks of the British Isles. Geological Society of London, Special Report No.8, Scottish Academic Press, Edinburgh. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
| none recorded or not applicable |
