| Computer Code: |
DSLM |
Preferred Map Code: |
notEntered |
| Status Code: |
Full |
| Age range: |
Arenig Series (OR)
— Arenig Series (OR) |
| Lithological Description: |
Limestone, massive, grey, fractured and veined; dolomitised and silicified over much of outcrop. Locally fossiliferous with a trilobite - brachiopod - gastropod faunal assemblage. |
| Definition of Lower Boundary: |
Limestone is unconformable on largely carbonated and silicafied Lime Hill Serpentinite. |
| Definition of Upper Boundary: |
Not seen; unit has faulted and/or unconformable relationship with overlying Old Red Sandstone conglomerates and sandstones. |
| Thickness: |
c.20m (estimated). |
| Geographical Limits: |
Ground around Lime Craig Quarry, Aberfoyle, but possible correlations in the Highland Border Complex are known at several localities adjacent to the Highland Boundary in Scotland; eg Margie Limestone, North Esk. |
| Parent Unit: |
Highland Border Complex (HBX)
|
| Previous Name(s): |
Dounans Limestone [Obsolete Name and Code: Use DSLM]
(-4625)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
Lime Craig Quarry, 1.5km north-ast of Aberfoyle, Perthshire. |
| Reference(s): |
| Ingham, J K, Curry, G B and Williams, A, 1985. Early Ordovician Dounans Limestone fauna, Highland Border Complex, Scotland, Transactions of the Royal Society of Edinburgh; Earth Sciences, Vol.76, 481-513. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S038
|
