The BGS Lexicon of Named Rock Units — Result Details
Lower Comley Sandstone Formation
| Computer Code: | LCSS | Preferred Map Code: | LCmS |
|---|---|---|---|
| Status Code: | Pending Upgrade | ||
| Age range: | Comley Series (EC) — Comley Series (EC) | ||
| Lithological Description: | Interbedded green, glauconitic and phosphatic shales, sandy mudstones and fine- to coarse-grained calcareous sandstones. | ||
| Definition of Lower Boundary: | Base of sandstones and mudstones as described under Lithology, resting on grey quartzites of the Wrekin Quartzite; junction is sharp and may be disconformable locally. | ||
| Definition of Upper Boundary: | Base of shelly glauconitic limestone of the overlying Lower Comley Limestones Formation. Locally an unconformity overlain by the Comley Breccia (bed). | ||
| Thickness: | 100-150m | ||
| Geographical Limits: | Church Stretton, Lilleshall, Shropshire. | ||
| Parent Unit: | Not Applicable (-) | ||
| Previous Name(s): | Lower Comley Series [Obsolete Name and Code: Use LCSS]
(-4150)
Lower Comley Sandstone Group [Obsolete Name and Code: Use LCSS] (-3515) Comley Sandstone Group [Obsolete Name And Code: See LCSS And UCSS] (CMS) Comley Sandstone Series [Obsolete Name and Code: Use LCSS, CMS] (-2710) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Partial Type Section | Comley Quarry. 1300m N35E of the summit of Caer Caradoc Hill. | ||
| Reference Section | Croft Borehole, Lilleshall, depth 53.95 - 66.6m. | ||
| Reference Section | Church Stretton No 7 Inclined Borehole, depth 73.0 - 245.5m. | ||
| Reference(s): | |||
| Cobbold, E S. 1921. The Cambrian horizons of Comley, Shropshire. Quarterly Journal of the Geological Society of London, Vol.76. | |||
| Brasier, M D. 1989. Sections in England and their correlation. 83-104 in The Precambrian-Cambrian Boundary. Cowie, J W, and Brasier, M D (editors). (Oxford University Press.) | |||
| Cowie, J W, Rushton, A W A and Stubblefield, C J, 1972. A correlation of Cambrian rocks in the British Isles. Special Report of the Geological Society of London, No.2, p.26. | |||
| 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. | |||
| Wright, J E, 1968. The geology of the Church Stretton area (Explanation of 1:25 000 Geological Sheet SO49). Institute of Geological Sciences. | |||
| Lapworth, C. 1891. On Olenellus callavei and its geological relationships. Geological Magazine, Vol.8, 532-533. | |||
| Cobbold, E S. 1927. The stratigraphy and geological structure of the Cambrian area of Comley. Quarterly Journal of the Geological Society, Vol.83, p.560. | |||
| Greig D C, Wright, J E, Hains, B A and Mitchell, G H. 1968. Geology of the country around Church Stretton, Craven Arms, Wenlock Edge and Brown Clee. Memoir of the Geological Survey, Sheet 166 (England and Wales). (London: H.M.S.O.). 379pp. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E152 E166 | |||