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: | 12.2-16.2 m at Dudley (Wren's Nest). | ||
| Geographical Limits: | West Midlands. | ||
| Parent Unit: | Much Wenlock Limestone Formation (WEL) | ||
| Previous Name(s): | Lower Wenlock Limestone
(LWL)
Quarried Limestone Member, Lower [Obsolete Code: Use LQL] (QLL) Lower Wenlock Limestone and Basement Beds [Together] [Obsolete Name and Code: Use LQL] (-4770) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| 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 | Daw End Railway cutting, east of Rushall aqueduct (Butler, 1939, p.54). | ||
| 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): | |||
| Bassett, 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, Vol. 74, 241-257. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E168 E154 E167 | |||