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
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