The BGS Lexicon of Named Rock Units — Result Details

Barnes High Sandstone Member

Computer Code: BHSA Preferred Map Code: notEntered
Status Code: Full
Age range: Barremian Age (KB) — Barremian Age (KB)
Lithological Description: Medium-grained yellow to grey sandstone as a single unit. In Compton Bay the member comprises three coarsening-upward sandstones separated by laminated mudstones. Topmost bed usually comprises a thin mudstone and bivalve conglomerate.
Definition of Lower Boundary: The lower boundary is conformable and marked by an abrupt or gradational change from grey mudstone and fine-grained sandstone of the Cowleaze Chine Member of the Vectis Formation up into to medium-grained yellow sandstone of this formation.
Definition of Upper Boundary: The upper boundary is conformable at a sharp but irregular contact between medium-grained sandstone (or mudstone/bivalve conglomerate) of the formation and the overlying rhythmically-bedded fine-grained sandstones, siltstones and mudstones of the Shepherd's Chine Member of the Vectis Formation
Thickness: 2.5 to 7m.
Geographical Limits: Limited to the Isle of Wight.
Parent Unit: Vectis Formation (VTIS)
Previous Name(s): Sandstone Of Cowleaze Down And Barnes High (-1986)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Reference Section  Compton Bay, west of Shippard's Chine [SZ 3750 8440]. Showing the full succession of the member. 
Type Section  Barnes High [SZ 4376 8068] to Shepherd's Chine [SZ 4466 7982] in Brightstone Bay, Isle of Wight. Showing the full succession of the member. 
Reference Section  Sandown Bay, Isle of Wight from Yaverland [SZ 6140 8510] to Red Cliff [SZ 6174 8524]. Showing a full but thin succession of the member. 
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). 
Daley, B and Stewart, D J. 1979. Weekend field meeting: The Wealden Group in the Isle of Wight. Proceedings of the Geologists' Association, Vol.90, 51-54. 
Kerth, M and Hailwood, E A. 1988. Magnetostratigraphy of the Lower Cretaceous Vectis Formation (Wealden Group) on the Isle of Wight, southern England. Journal of the Geological Society, Vol.145, 351-360. 
Stewart, D J. 1981. A field guide to the Wealden Group of the Hastings area and the Isle of Wight. 3.1-3.32 in Elliott, T (Editor), Field Guides to Modern and Ancient Fluvial Systems in Britain and Spain, International Fluvial Conference, Keele University, UK. 
Osborne White, H J. 1921 [1994 reprint]. A short account of the geology of the Isle of Wight. Memoirs of the Geological Survey of Great Britain. 235pp. [HMSO.] 
Insole, A, Daley, B, and Gale, A. 1998. The Isle of Wight. Geologists’ Association Guide. No. 60. (The Geologists’ Association.)  
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable