The BGS Lexicon of Named Rock Units — Result Details

Taynton Limestone Formation

Computer Code: TY Preferred Map Code: Ty
Status Code: Full
Age range: Bathonian Age (JN) — Bathonian Age (JN)
Lithological Description: White to pale brown, typically well-sorted medium- to coarse-grained, moderately to highly shell-detrital ooidal grainstone, locally fine- to very coarse-grained; medium to thickly well-bedded and cross-bedded, with thin shell-detrital marl seams and locally calcareous sandstone beds.
Definition of Lower Boundary: Top of highest significant mudstone in Fuller's Earth Formation or Sharp's Hill Formation, or passage from finer grained limestone of the Eyford Member, where present.
Definition of Upper Boundary: Passage upwards into fine-grained ooidal limestone and marls of Hampen Formation or mudstone, siltstone and limestone of the Rutland Formation.
Thickness: 0-11m, locally possibly up to 15m, type area 6 to 8m
Geographical Limits: Stroud, Gloucestershire (where passes westwards near Stroud into finer grained limestones of Througham Member (Fuller's Earth Formation) and succeeding Hampen Formation; Sumbler, M G, Barron, A J M and Morigi, A N, 2000. To Brackley, Northants (where passes northeast into Wellingborough Member (formerly Upper Estuarine Limestone) of the Rutland Formation (Horton et al, 1987)).
Parent Unit: Great Oolite Group (GOG)
Previous Name(s): Taynton Stone (-4944)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Lee's Quarry, Taynton Down, Oxfordshire. Sumbler, M G and Williamson, I T. 1998. 
Reference Section  Farmington Quarry, Gloucestershire. Sumbler, M G, 1995. 
Reference Section  Hampen Railway Cutting. Barron, A J M, 1998. 
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. 
Sumbler, M G and Williamson, I T. 1998. Lee's Quarry Taynton: a type locality for the Taynton Limestone Formation (Middle Jurassic, Great Oolite Group). Proceedings of the Cotteswold Naturalists' Field Club, Vol. 41 (2), p. 222 - 229. 
Sumbler, M G, 1995. Geological notes and local details for 1:10 000 Sheet SP11NW (Farmington). British Geological Survey Technical Report WA/95/3. 
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). 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E235 E236 E237 E252 E219 E217