The BGS Lexicon of Named Rock Units — Result Details

Lower Quarried Limestone Member

Computer Code: LQL Preferred Map Code: LQL
Status Code: Full
Age range: Homerian Age (SH) — Homerian Age (SH)
Lithological Description: Limestone, grey, bioclastic, micritic, with abundant shelly fossils and thin calcareous mudstone partings; reefs (bioherms) locally present.
Definition of Lower Boundary: Base of lowest regularly bedded limestone in 2-3m transitional zone with underlying Coalbrookdale Formation.
Definition of Upper Boundary: Gradational passage taken at the transition from limestone-dominated beds to calcareous mudstone and nodular limestone beds of the overlying Nodular Member.
Thickness: 12.2-16.2m at Dudley (Wren's Nest)
Geographical Limits: West Midlands.
Parent Unit: Much Wenlock Limestone Formation (WEL)
Previous Name(s): Lower Wenlock Limestone And Basement Beds [Together] (-4770)
Quarried Limestone Member, Lower [Obsolete Code: Use LQL] (QLL)
Lower Wenlock Limestone (LWL)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Reference Section  Daw End Railway cutting, east of Rushall aqueduct (Butler, 1939, p.54). 
Type Section  Wren's Nest, Geological Trail, Dudley; NCC cutting to south side of Wren's Hill Road and in associated quarry workings; locality 2 of Cutler and others, 1990. 
Reference Section  Wren's Nest Geological Trail, Dudley, The Quarry, southeast face, locality 4 of Cutler and others, 1990. 
Reference Section  Castle Hill, Dudley; canal basin, locality CH12 of Butler (1939). 
Reference(s):
Basset, M G, 1974. Review of the stratigraphy of the Wenlock Series of the Welsh Borderlands and South Wales. Palaeontology, 17, 745-777. 
Butler, A J, 1939. The stratigraphy of the Wenlock Limestone of Dudley. Quarterly Journal of the Geological Society of London, 95, 37-74. 
Cutler, A, Oliver, P G and Reid, C G R, 1990. Wren's Nest National Nature Reserve. Geological Handbook and Field Guide. Nature Conservancy Council/Dudley MBC. 
Butler, A J, 1937. On Silurian and Cambrian rocks encountered in a deep boring at Walsall, South Staffordshire, Geological Magazine, 74, 241-257. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E168 E154 E167