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): Barrington Beds (-39)
Upper Lias Limestone (-670)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Quarry, west of cross roads on Winsmoor Hill, halfway between Barrington and Stocklinch, Somerset. 
Reference Section  Excavations for a reservoir. 
Reference Section  Quarry, 300m north of type section entry, west side of Shelway Lane. 
Reference(s):
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. 
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) 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable