The BGS Lexicon of Named Rock Units — Result Details
Stour Formation
| Computer Code: | STOU | Preferred Map Code: | Sto |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Oxfordian Age (JO) — Oxfordian Age (JO) | ||
| Lithological Description: | Alternating sequence of oolitic limestone and clay, commonly oolitic, with generally only a minor sand content. | ||
| Definition of Lower Boundary: | Incoming of ooliths, generally accompanied by a significant drop in, or elimination of, sand. | ||
| Definition of Upper Boundary: | At the top of the non-bioclastic or evenly graded bioclastic limestone. | ||
| Thickness: | 17 - 28m | ||
| Geographical Limits: | From the eastern edge of the Yeovil Sheet (312), across the Shaftesbury Sheet (313) and the northern part of the Wincanton Sheet (297). | ||
| Parent Unit: | Corallian Group (CR) | ||
| Previous Name(s): | Berkshire Oolite Series and Osmington Oolite Series [Obsolete Name and Code: Use STOU]
(-1847)
Osmington Oolite Series [Obsolete Name and Code: Use COO, OSS, STFD, STOU] (-1450) Stour Formation and Osmington Formation [Obsolete Name and Code: Use STOU] (-4905) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Section | Cannings Court Borehole (ST70NW/2) from 2.8 - 19.9m depth. | ||
| Type Section | East Stour Borehole ST82SW/9 (5.0 - 28.2m). | ||
| Type Section | Hazelbury Bryan Borehole (ST70NE/3) from 6.1 - 25.25m depth. | ||
| Reference(s): | |||
| Gutmann, K, 1970. The Corallian Beds at Todber and White Way Hill in north Dorset. Proceedings of Dorset Natural History and Archaeological Society, Vol.91, p.123-133. | |||
| Arkell, W J. 1933. The Jurassic System in Great Britain (Oxford: Clarendon Press.) | |||
| Bristow, C R. 1989. Geology of Sheets 71NE and 71SE. (Marnhull-Sturminster Newton, Dorset) Part of 1:10,000 Sheet 313 (Shaftesbury). British Geological Survey Technical Report WA/89/59. | |||
| Bristow, C R. 1989. Geology of the East Stour - Shaftesbury district (Dorset) British Geological Survey Technical Report WA/89/58. | |||
| Bristow, C R. 1990. Geology of the West Stour - Cucklington district. British Geological Survey Technical Report WA/90/48. | |||
| Freshney, E C. 1989. Geology of Sheets ST70NW and ST70NE. (Hazelbury Bryan-Mappowder district, Dorset). British Geological Survey Technical Report WA/90/51. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E313 E281 | |||