The BGS Lexicon of Named Rock Units — Result Details

Barrington Member

Computer Code: BARB Preferred Map Code: notEntered
Status Code: Full
Age range: Toarcian Age (JT) — Toarcian Age (JT)
Lithological Description: Poorly ooidal micrites and calcarenites with common ammonites.
Definition of Lower Boundary: Upward change from ferruginously weathering calcarenite with dominant mudstone clasts, pebbles and belemnite fragments.
Definition of Upper Boundary: Upward change from limestone to clays (Down Cliff Clay) or, where absent, sands of the Bridport Sands.
Thickness: 0-3m
Geographical Limits: Barrington (at least) to Pennard Hill in the north [ST 615 375]
Parent Unit: Beacon Limestone Formation (BNLS)
Previous Name(s): Upper Lias Limestone (-670)
Barrington Beds (-39)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Reference Section  Quarry, 300m north of type section entry, west side of Shelway Lane. 
Type Section  Quarry, west of cross roads on Winsmoor Hill, halfway between Barrington and Stocklinch, Somerset. 
Reference Section  Excavations for a reservoir. 
Reference(s):
Kellaway, G A and Wilson, V. 1941. An outline of the geology of Yeovil, Sherborne and Sparkford Vale. Proceedings of the Geologists' Association, Vol.52, 131-174. 
Bristow, C R and Westhead R K, 1993. Geology of the Evercreech-Batcombe area (Somerset). British Geological Survey Technical Report WA/93/89. 
Buckman, S S, 1927. Type Ammonites, Vol.6. (London: S S Buckman) 
Howarth, M K, 1992. The ammonite family Hildoceratidae in the Lower Jurassic of Britain. Monograph of the Palaeontographical Society, Pt 1 and 2, 1-200, 38pls. 
Donovan, D T, Bennett, R, Bristow, C R, Carpenter, S C, Green, G W, Hawkes, C J, Prudden, H C and Stanton W I, 1989. Geology of a gas pipeline from Ilchester (Somerset) to Pucklechurch (Avon), 1985. Proceedings of the Somerset Archaeological and Natural History Society for 1988, Vol.132, 297-317. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable