The BGS Lexicon of Named Rock Units — Result Details

Fintry Hills Lava Member

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):
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