The BGS Lexicon of Named Rock Units — Result Details

Lower Comley Limestones Formation

Computer Code: LCML Preferred Map Code: LCmL
Status Code: Pending Upgrade
Age range: Comley Series (EC) — Comley Series (EC)
Lithological Description: Sandy glauconitic and phosphatic limestone overlain by phosphatic algal micrite.
Definition of Lower Boundary: Base of shelly glauconitic limestone, resting on glauconitic sandstone of the Lower Comley Sandstone.
Definition of Upper Boundary: Unconformable beneath Middle Cambrian sequence of pale grey-green calcareous sandstones and shales with thin limestones (Upper Comley Group).
Thickness: 2m
Geographical Limits: Shropshire.
Parent Unit: Not Applicable (-)
Previous Name(s): Comley Limestone Formation (-1643)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Comley Quarry. 1300m N33E of the summit of Caer Caradoc Hill. 
Reference Section  Croft Borehole, Lilleshall (SJ71NW/16) 53.77 - 53.95m. 
Reference(s):
Greig, D C and others, 1989. Geology of the country around Church Stretton, Craven Arms, Wenlock Edge and Brown Clee. Memoirs of the Geological Survey of Great Britain. 
Wright, J E, 1968. The geology of the Church Stretton area (Explanation of 1:25 000 Geological Sheet SO49). Institute of Geological Sciences. 
Brasier, M D, 1989. Sections in England and their correlation. 83 - 104 in Cowie, J W and Brasier, M D (Editors). The Precambrian-Cambrian Boundary. [Oxford University Press.] 
Rushton, A W A, Hamblin, R J O and Strong, G E, 1988. The Croft Borehole in the Lilleshall Inlier of North Shropshire. Report of the British Geological Survey, Vol.19, No.3. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E166 E152