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 [Obsolete Name and Code: Use BARB]
(-39)
Upper Lias Limestone (-670) |
||
| 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): | |||
| 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. | |||
| 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. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| none recorded or not applicable | |||