The BGS Lexicon of Named Rock Units — Result Details
Wheatley Limestone Member
| Computer Code: | WYLS | Preferred Map Code: | WL |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Oxfordian Age (JO) — Oxfordian Age (JO) | ||
| Lithological Description: | Shell-fragmental, biosparite grainstones interbedded with shell-fragmental marls, locally with rubbly coralliferous limestone with marls of the 'Coral Rag' facies. | ||
| Definition of Lower Boundary: | A sharp, upward non-sequential transition from sand and sandstone of the Beckley Sand Member of the Kingston Formation, to shell-fragmental limestone, generally with very little quartz sand, except in the reworked basal bed, which may otherwise be marked by a shelly conglomeratic bed with or without a shelly marl. | ||
| Definition of Upper Boundary: | Sharp, upward non-sequential change to grey mudstones of the Ampthill Clay Formation. | ||
| Thickness: | Up to 26 m thick. | ||
| Geographical Limits: | The Oxford area and from Wheatley to Cumnor as shown on 1:50 000 sheets 236 and 237. The southern and western extents are uncertain, but are likely to extend as far as Faringdon (sheet 253) ,and possibly towards Swindon and Calne too. | ||
| Parent Unit: | Stanford Formation (STFD) | ||
| Previous Name(s): | Wheatley Limestone [Obsolete Name and Code: Use WYLS]
(-3781)
Coral Rag [Obsolete Name and Code: Use CLRG, WYLS] (-2706) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Area | Quarries in Wheatley village, e.g. Gaol House Quarry. Arkell, 1927. | ||
| Reference Section | Primary reference: Lye Hill Quarry, Wheatley. Horton et al., 1995. | ||
| Reference Section | BGS Cumnor (Henwood Farm) Borehole (SP40SE/11), 11.94 - 20.35 m depth. Coral Rag facies; Horton et al., 1995. | ||
| Reference(s): | |||
| Horton, A, Sumbler, M G, Cox, B M and Ambrose, K, 1995. Geology of the country around Thame. Memoir of the British Geological Survey, Sheet 237 (England and Wales). | |||
| Cox, B M, and Wright, J K. 2001. British Upper Jurassic stratigraphy (Oxfordian to Kimmeridgian). Geological Conservation Review Series, No. 21. (Peterborough: Joint Nature Conservation Committee.) | |||
| Arkell, W J. 1947. The Geology of Oxford. 267pp. (Oxford: Clarendon Press.) | |||
| Arkell, W J. 1933. The Jurassic System in Great Britain (Oxford: Clarendon Press.) | |||
| Arkell, W J. 1927. The Corallian rocks of Oxford, Berkshire and north Wiltshire. Philosophical Transactions of the Royal Society of London, Vol. B216, 67-181. | |||
| Wright, J K and Cope, J C W. In press. Oxfordian - Kimmeridgian Correlation Chart. In: A correlation of Jurassic rocks in the British Isles: Middle and Upper Jurassic. Cope, J C W (editor). Special Report of the Geological Society of London. | |||
| Pringle, J. 1926. The geology of the country around Oxford, (2nd edition). Memoir of the Geological Survey of Great Britain. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E237 E236 E253 | |||