The BGS Lexicon of Named Rock Units — Result Details
Sandsfoot Formation
| Computer Code: | SDT | Preferred Map Code: | Sft |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Oxfordian Age (JO) — Oxfordian Age (JO) | ||
| Lithological Description: | A variable unit ranging from sand-free clay through clayey fine-grained sand, to sand, ferruginous sandstone and limonitic oolite. | ||
| Definition of Lower Boundary: | Upward change from limestones of the Clavellata Formation into silicaclastic beds or limonitic oolite. | ||
| Definition of Upper Boundary: | Upward change from sands, clayey sands and, locally, limonitic oolite to smooth mudstone of the Ringstead Waxy Clay/Ampthill Clay/Kimmeridge Clay. | ||
| Thickness: | 2 to 12m | ||
| Geographical Limits: | Dorset to Wiltshire, and probably other areas too. | ||
| Parent Unit: | Corallian Group (CR) | ||
| Previous Name(s): | Upper Calcareous Grit [Obsolete Name and Code: Use UCG, SDT]
(-1171)
Sandsfoot Beds (-518) Glos Oolite Series [Obsolete Name and Code: Use SDT] (-4321) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Section | Cliff section below Sandsfoot Castle, Weymouth. | ||
| Reference(s): | |||
| Arkell, W J. 1947. Geology of the country around Weymouth, Swanage, Corfe and Lulworth. Memoir of the British Geological Survey. Sheets 341, 342, 343 and small portions of sheets 327, 328 and 329 (England and Wales). | |||
| Bristow, C R, Barton, C M, Freshney, E C, Wood, C J, Evans, D J, Cox, B M, and Woods, M A. 1999. The Wincanton district - a concise account of the geology. Memoir of the British Geological Survey, Sheet 297 (England and Wales). | |||
| Bristow, C R, Barton, C M, Freshney, E C, Wood, C J, Evans, D J, Cox, B M, Ivimey-Cook, H C, and Taylor, R T. 1995. Geology of the country around Shaftesbury. Memoir of the British Geological Survey, Sheet 313 (England and Wales). | |||
| Woodward, H B. 1895. the Jurassic Rocks of Britain. The Middle and Upper Oolitic rocks of England (Yorkshire excepted). Vol.5. Memoir or the Geological Survey of the United Kingdom. | |||
| Strahan, A. 1898. The Geology of the Isle of Purbeck and Weymouth. Memoir of the Geological Survey of England and Wales, 278pp. [HMSO.] | |||
| Blake, J F, and Huddleston, W H. 1877. On the Corallian rocks of England. Quarterly Journal of the Geological Society of London, Vol. 33, 260-405. | |||
| Arkell, W J. 1933. The Jurassic System in Great Britain (Oxford: Clarendon Press.) | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E313 E297 E281 E341 E342 E343 E327 | |||