The BGS Lexicon of Named Rock Units — Result Details

Neilston Lava Member

Computer Code: NNLA Preferred Map Code: notEntered
Status Code: Full
Age range: Visean Stage (CV) — Visean Stage (CV)
Lithological Description: The Neilston Lava Member consists of alkali basalts with minor basanite in the lower part and trachybasalt in the upper.
Definition of Lower Boundary: The base is apparently conformable on the Moyne Moor Lava Member, which consists predominantly of trachybasalt, but it might locally be unconformable.
Definition of Upper Boundary: The Member is overlain by the trachytic Harelaw Lava Member. The contact is unconformable.
Thickness: >100m
Geographical Limits: Dunlop-Eaglesham moors between Glasgow, Kilmarnock and Hamilton, in the western part of the area between Neilston (NS 480 570) and Stewarton (NS 430 480).
Parent Unit: Clyde Plateau Volcanic Formation (CPV)
Previous Name(s): Neilston Lavas (-1088)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  Dunlop-Eaglesham moors between Glasgow, Kilmarnock and Hamilton, in the western part of the area between Neilston (NS 480 570) and Stewarton (NS 430 480). MacPherson and Phillips. 1997. 
Reference(s):
Phillips, E R and MacPherson, K A T. 1996. Petrology, geochemistry and classification of the Clyde Plateau Volcanic Formation, Kilmarnock district (Sheet 22), Midland Valley, Scotland. British Geological Survey Minerology and Petrology Technical Report, WG/96/24. 
MacPherson, K A T and Phillips, E R. 1997. The geology of the Clyde Plateau Volcanic Formation of the Kilmarnock district (Sheet 22E), central Scotland. British Geological Survey Report, WA/97/88. 
MacPherson, K A T, Smith, R A and Akhurst, M C. 2000. Geology of the Kilmarnock district. Sheet description of the British Geological Survey 1:50 000 Sheet 22E Kilmarnock (Scotland). 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S022