The BGS Lexicon of Named Rock Units — Result Details
Stour Formation
Computer Code: | STOU | Preferred Map Code: | Sto |
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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): | 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) Berkshire Oolite Series and Osmington Oolite Series [Obsolete Name and Code: Use STOU] (-1847) |
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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): | |||
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. | |||
Arkell, W J. 1933. The Jurassic System in Great Britain [Oxford: Clarendon Press.] | |||
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. | |||
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. | |||
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 |