The BGS Lexicon of Named Rock Units — Result Details

Upper Flow Moss Lava Member [Obsolete Name And Code: Use FMLA]

Computer Code: UFMLA Preferred Map Code: notEntered
Status Code: Full
Age range: Visean Stage (CV) — Visean Stage (CV)
Lithological Description: The Upper Flow Moss Lava Member consists of alkali basalts and subordinate basanites and ankaramites.
Definition of Lower Boundary: The base is apparently unconformable on the Harelaw Lava Member, which consists of trachytic lavas, and the volcaniclastic rocks of the Gowk Stane Member. A thick bole formed on the top flow of the Lower Flow Moss Member marks the contact with this underlying member.
Definition of Upper Boundary: The Member is overlain unconformably by the Kirkwood Formation (Strathclyde Group).
Thickness: Not known.
Geographical Limits: Dunlop-Eaglesham moors between Glasgow, Kilmarnock and Hamilton, widespread area between Neilston (NS 440 560) in the northwest and Darvel (NS 610 390) in the southeast.
Parent Unit: none recorded or not applicable
Previous Name(s): Flow Moss Lavas (-4159)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  Dunlop-Eaglesham moors between Glasgow, Kilmarnock and Hamilton, widespread between Neilston (NS 440 560) in the northwest and Darvel (NS 610 390) in the southeast. MacPherson and Phillips. 1997. 
Reference(s):
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