| Computer Code: |
SOHI |
Preferred Map Code: |
notEntered |
| Status Code: |
Full |
| Age range: |
Neoproterozoic Era (AZ)
— St David's Series (ED) |
| Lithological Description: |
A thick pile of psammitic and pelitic greywackes and associated rocks, some volcanic. |
| Definition of Lower Boundary: |
The top of the highest limestone recorded in the Tayvallich Subgroup |
| Definition of Upper Boundary: |
Gradual transition into overlying, less deformed, probable Ordovician rocks of lower metamorphic grade. |
| Thickness: |
>5000m |
| Geographical Limits: |
South Sperrin Mountains and Lack Inlier, Northern Ireland. Southern Highlands, Scotland |
| Parent Unit: |
Dalradian Supergroup (DALN)
|
| Previous Name(s): |
Upper Dalradian Group [Obsolete Name And Code: See SOHI]
(DC)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
Dunkeld, Southern Highlands, Scotland. |
| Type Area |
Trossachs, northwest of Highland Boundary Fault. |
| Type Area |
Aberfoyle area, Southern Highlands, Scotland. |
| Type Area |
Callander area, Southern Highlands, Scotland. |
| Reference(s): |
| Johnson, M R W, 1983. Dalradian. "In" Craig, G Y. Geology of Scotland, Edinburgh. |
| Harris, A L and Fettes, D J, 1972. Stratigraphy and structure of Upper Dalradian rocks at the Highland Border. Scottish Journal of Geology, Vol.8 (3), p.253-264. |
| Roberts, J L and Treagus, J E, 1979. Stratigraphical and structural correlation between the Dalradian rocks of the South-west and Central Highlands of Scotland. "In" Harris, A L and others. The Caledonides of the British Isles. |
| Treagus, J E, 1987. The structural evolution of the Dalradian of the Central Highlands of Scotland. Transactions of the Royal Society of Edinburgh: Earth Sciences, Vol.78, p.1-15. |
| Barrow, G and others, 1905. The geology of the country round Blair Atholl, Pitlochry and Aberfeldy. Memoirs of the Geological Survey. Scotland. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S038
S029
S037
S020
S012
S048
S021
S028
S055
S055
S056
S056
S066
S067
S030
S038
S045
S045
S039
S096
S076
S076
S086
S046
S046
S047
S047
S057
S086
S087
S087
S096
S097
|
