The BGS Lexicon of Named Rock Units — Result Details
Baginton Sand and Gravel Formation
| Computer Code: | BGSG | Preferred Map Code: | notEntered |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Early Pleistocene (QPE) — Mid Pleistocene (QPM) | ||
| Lithological Description: | The formation encompasses fluvial, lacustrine and organic deposits of the Proto-Soar River. The deposits are sands and gravels, with lenses of silt and clay. In the type area around Coventry, the formation includes gravels (the Baginton-Lillington Gravel of Shotton, 1953) overlain by sand (the Baginton Sand of Shotton, 1953). The gravels are up to 98% composed of grey and purple quartzite and vein quartz, largely of Triassic derivation, with a little Jurassic limestone, ironstone and robust fossils. The sands are fine- to medium-grained, clean and well-sorted. They are interpreted as the deposits of low-sinuosity braided rivers dominated by longtitudinal bars. They differ from the Bytham Sand and Gravel Formation by having a low proportion of Jurassic material. | ||
| Definition of Lower Boundary: | Unconformable on pre-Quaternary bedrock. | ||
| Definition of Upper Boundary: | Commonly overlain by Middle Pleistocene glacigenic deposits. Upper boundary may be difficult to determine where overlain by glaciofluvial sand and gravel, but the presence of more angular clasts, chalk, and poorer sorting in the latter is usually helpful. | ||
| Thickness: | c.16.5m | ||
| Geographical Limits: | The valley of the Proto-Soar River around Coventry, extending as far west as Snitterfield near Stratford-on-Avon. Eastwards it extends to Croft and Huncote (1:50 000 Sheets 155, 169) but does not extend onto Sheet 156. | ||
| Parent Unit: | Bytham Catchments Subgroup (BYCA) | ||
| Previous Name(s): | Baginton Sand and Gravel [Obsolete Name and Code: Use BGSG]
(-2603)
Baginton Sand [Obsolete Name and Code: Use BGSG] (-4459) Baginton-Lillington Gravel [Obsolete Name and Code: Use BGSG] (-1979) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Section | Gravel pit northeast of Baginton. Shotton, 1929. | ||
| Reference(s): | |||
| Bridge, D M, Carney, J N, Lawley, R S, and Rushton, A W A. 1998. Geology of the country around Coventry and Nuneaton. Memoir of the British Geological Survey, Sheet 169 (England and Wales). | |||
| Shotton, F W. 1953. The Pleistocene deposits of the area between Coventry, Rugby and Leamington and their bearing on the topographic development of the Midlands. Philosophical Transactions of the Royal Society of London, Vol.B237, 209-260. | |||
| Shotton, F W, 1929. The geology of the country around Kenilworth (Warwickshire). Quarterly Journal of the Geological Society of London, Vol.28, 167 - 222. | |||
| Old, R A, Sumbler, M G and Ambrose, K, 1987. Geology of the country around Warwick. Memoir of the British Geological Survey, Sheet 184 (England and Wales). | |||
| Rose, J. 1989. Tracing the Baginton-Lillington Sand and Gravel from the West Midlands to East Anglia. 102-110 in Keen, D H (editor), The Pleistocene of the West Midlands: Field Guide [Cambridge: Quaternary Research Association.] | |||
| Rice, R J. 1981. The Pleistocene deposits of the area around Croft in South Leicestershire. Philosophical Transactions of the Royal Society of London, Vol.B293, 385-418. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E155 E169 E184 E183 | |||