| Computer Code: |
FHLA |
Preferred Map Code: |
notEntered |
| Status Code: |
Full |
| Age range: |
Arundian Substage (CJ)
— Asbian Substage (CR) |
| Lithological Description: |
The Fintry Hills Lava Member consists predominantly of plagioclase-macrophyric basalt lavas (of 'Markle' type) with a fairly high proportion of microporphyritic basalts and rare basaltic-trachandesites (mugearites). Tuff occurs locally [NS 6409 8794]. |
| Definition of Lower Boundary: |
The basal basalt of the member lies apparently conformably or disconformably on trachybasalt of the Shelloch Burn Lava Member. |
| Definition of Upper Boundary: |
The upper boundary has been eroded. |
| Thickness: |
More than 122 m, top of member eroded. |
| Geographical Limits: |
The member is restricted to the Fintry Hills, north-east of Glasgow. These rocks crop out across the hilltops of the central part of the Fintry Hills ([NS 6369 8867] to [NS 6321 8911]). |
| Parent Unit: |
Clyde Plateau Volcanic Formation (CPV)
|
| Previous Name(s): |
Fintry Hills Group
(-909)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
Highest parts of the Fintry Hills, north-east of Glasgow. Francis et al., 1970. |
| Reference(s): |
| Dean, M T, Browne, M A E, Waters, C N and Powell, J H. 2011. A lithostratigraphical framework for the Carboniferous successions of northern Great Britain (onshore). British Geological Survey Research Report, RR/10/007. 165pp. |
| Francis, E H, Forsyth, I H, Read, W A and Armstrong, M. 1970. The geology of the Stirling district. Memoir of the Geological Survey of Great Britain, Sheet 39 (Scotland). |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S039
|
