The BGS Lexicon of Named Rock Units — Result Details
Barton Group
| Computer Code: | BA | Preferred Map Code: | notEntered |
|---|---|---|---|
| Status Code: | Full, pending ratification | ||
| Age range: | Lutetian Age (GL) — Priabonian Age (GI) | ||
| Lithological Description: | Yellow weathering, green-grey clay, with discrete fine-grained sand bands, yellow-pale grey weathering fine-grained sand, green-grey, sandy clay and clayey, silty fine-grained sand. | ||
| Definition of Lower Boundary: | Drawn at base of clay and flint pebbles of the Barton Clay where it rests conformably on grey-brown sand of the Selsey Sand. | ||
| Definition of Upper Boundary: | Drawn at conformable upward passage from black clays of the Belton Sand to pale green clays of the Headon Formation. | ||
| Thickness: | Approximately 175 metres. | ||
| Geographical Limits: | Hampshire, England. | ||
| Parent Unit: | Not Applicable (-) | ||
| Previous Name(s): | Barton Formation [Obsolete Name and Code: Use BA]
(-35)
London Clay [Obsolete Name and Code: Use BA] (-3811) Barton Beds (-665) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Area | Sea cliffs at Highcliffe and Barton, Hampshire, England. | ||
| Type Section | Sea cliffs from Cliff End, 1km east of Mudeford, to Paddy's Gap near Milford, Hampshire, England. | ||
| Reference(s): | |||
| Melville, R V and Freshney, E C. 1982. British Regional Geology: the Hampshire Basin and adjoining areas (4th Edition).(London ,HMSO for Institute of Geological Sciences). | |||
| Freshney, E C, et al. 1990. The boundary between the Selsey Sand and Barton Clay Formations, at Whitecliffe Bay, Isle of Wight. Tertiary Research, Vol. 12 (2), p.65-68. | |||
| Prestwich, J, 1847. On the probable age of the London Clay, etc. Quarterly Journal of the Geological Society, Vol.3, p.354-409. | |||
| Burton, E St J. 1929. The horizons of Bryozoa (Polyzoa) in the Upper Eocene beds of Hampshire. Quarterly Journal of the Geological Society, Vol. 85, 223-239. | |||
| Edwards, R A and Freshney, E C. 1987. Geology of the country around Southampton. Memoir of the British Geological Survey, Sheet 315 (England and Wales). | |||
| Prestwich, J, 1857. On the correlation of the Eocene Tertiaries of England, France, and Belgium. Quarterly Journal of the Geological Society, Vol.13, p.108. | |||
| Gardner, J S, Keeping, H and Monckton, H W, 1988. The Upper Eocene, comprising the Barton and Upper Bagshot Formations. Quarterly Journal of the Geological Society, Vol.44, p.578-635. | |||
| Reid, C, 1898. Bournemouth. Memoirs of the Geological Survey of Great Britain. | |||
| Burton, E St J. 1933. Faunal horizons of the Barton Beds in Hampshire. Proceedings of the Geologists' Association, Vol. 44, 131-167. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E269 E284 | |||