The BGS Lexicon of Named Rock Units — Result Details
Notgrove Member
| Computer Code: | NGRV | Preferred Map Code: | Ng |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Bajocian Age (JB) — Bajocian Age (JB) | ||
| Lithological Description: | Pale brownish grey, poorly sorted medium- to coarse-grained peloidal and ooidal grainstone, typically poorly sorted or bimodal; medium-bedded and cross-bedded, shells and shell debris rare, except in lowest beds. | ||
| Definition of Lower Boundary: | Upward transition from very shelly, shell-detrital limestone (Gryphite Grit Member) into limestone as described in lithology. | ||
| Definition of Upper Boundary: | Hardground: limestone as described in lithology overlain by shelly, sandy, ironshot limestone (Rolling Bank Member), or by Salperton Limestone Formation. | ||
| Thickness: | 0 - 13m. Type section (Notgrove Cutting); 3.9m (Buckman, J, 1887). | ||
| Geographical Limits: | Mid and north Cotswolds: north of Colesbourne and Chedworth, and west of Cold Aston and Condicote. Barron, A J M, et al, 1997, fig.4. | ||
| Parent Unit: | Aston Limestone Formation (ASLS) | ||
| Previous Name(s): | Notgrove Freestone [Obsolete Name and Code: Use NGRV]
(-1726)
Notgrove Oolite [Obsolete Name and Code: Use NGRV] (-1083) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Reference Section | 'Tumulus' railway cutting, Chedworth Woods, Gloucestershire. Cutting K of Woodward, H B, 1894, fig.42. Buckman, J, 1895, section 25, bed 1; Sumbler, M G and Barron, A J M, 1995, appendix 1, locality A, beds 16-17. For further reference sections see Barron, A J M, et al, 1997. | ||
| Type Area | North Cotswolds, Gloucestershire. See Barron et al., 1997 for further reference sections. | ||
| Type Section | Notgrove railway cutting SSSI, northeast of Salperton, Gloucestershire. First cutting west of Notgrove Station of Buckman, J, 1887, p.123; Barron, A J M, 1998, appendix 1, locality Q; Cox, B M, and Sumbler, M G. 2002. | ||
| Reference(s): | |||
| Barron, A J M. 1998. Geology of the Hawling area: 1:10 000 Sheet SP02SE. British Geological Survey Technical Report WA/98/26. | |||
| Buckman, S S. 1895. The Bajocian of the mid-Cotswolds. Quarterly Journal of the Geological Society of London, Vol. 51, 388-445; 458-462. | |||
| Sumbler, M G, Barron, A J M and Morigi, A N, 2000. Geology of the Cirencester district. Memoir of the British Geological Survey, Sheet 235 (England and Wales). | |||
| Woodward, H B, 1894. The Jurassic Rocks of Britain, Vol.4. The Lower Oolitic Rocks of England (Yorkshire excepted). Memoir of the Geological Survey of the United Kingdom. | |||
| Barron, A J M, Sumbler, M G and Morigi, A N. 1997. A revised lithostratigraphy for the Inferior Oolite Group (Middle Jurassic) of the Cotswolds, England. Proceedings of the Geologists' Association, Vol. 108, 269-285. | |||
| Buckman, S S. 1887. The Inferior ooilte between Andoversford and Bourton-on-the-Water. Proceedings of the Cotteswold Naturalists' Field Club, Vol. 9, 108-135. | |||
| Sumbler, M G and Barron, A J M, 1995. Geological notes and local details for 1: 10 000 Sheet SP01SE (Chedworth). British Geological Survey Technical Report, WA/95/73. | |||
| Cox, B M, and Sumbler, M G. 2002. British Middle Jurassic Stratigraphy. Geological Conservation Review Series No.26. [Peterborough: Joint Nature Conservation Committee.] | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E235 E217 | |||