| Computer Code: |
CVO |
Preferred Map Code: |
CvO |
| Status Code: |
Full |
| Age range: |
Bajocian Age (JB)
— Bajocian Age (JB) |
| Lithological Description: |
[Obsolete: use ULL] Limestone, high energy ooidal and bioclastic grainstones, with fine-grained weakly or non-ooidal, shelly and/or silty limestone and calcareous siltstone in lower part. |
| Definition of Lower Boundary: |
More or less disconformable contact with dominantly micritic, low energy limestone or mudstone of the Lower Lincolnshire Limestone (Kirton Cementstone Member), overlain by ooidal and bioclastic grainstone. |
| Definition of Upper Boundary: |
Disconformable, commonly markedly eroded and karstified contact between ooidal and bioclastic grainstone and non-calcareous, non-marine sandstones, siltstones and mudstones of the overlying Rutland Formation (Thorncroft Sand Member). Near the northern limit only, disconformable contact between limestone and ferruginous sandy calcareous sediments of the Hunstanton Formation (Cretaceous; Chalk Group). |
| Thickness: |
0 to c.10 m. |
| Geographical Limits: |
Yorkshire, from the Humber to Market Weighton (BGS 1:50 000 sheets 72 and 80). |
| Parent Unit: |
none recorded or not applicable
|
| Previous Name(s): |
Cave Oolite Member [Obsolete Name and Code: Use CVO, ULL]
(-1467)
|
| Alternative Name(s): |
Upper Lincolnshire Limestone [Obsolete: use ULL]
|
| Stratotypes: |
| Reference Section |
Eastfield Quarry, near Everthorpe, East Riding of Yorkshire. Cave Oolite fully exposed and reaching 8.1 m in thickness. Cox and Sumbler, 2002, p.305. |
| Type Area |
South Cave, East Riding of Yorkshire. Phillips, 1835. |
| Reference(s): |
| Cox, B M, and Sumbler, M G. 2002. British Middle Jurassic Stratigraphy. Geological Conservation Review Series No.26. [Peterborough: Joint Nature Conservation Committee.] |
| Phillips, J. 1835. Illustrations of the geology of Yorkshire: or a description of the Strata and Organic Remains: accompanied by a geological map, sections and Plates of the Fossil Plants and Animals, Part I: The Yorkshire Coast. [London: John Murray.] |
| Gaunt, G D, Fletcher, T P and Wood, C J. 1992. Geology of the country around Kingston upon Hull and Brigg. Memoir of the British Geological Survey, sheets 80 and 89 (England and Wales). 172pp. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E072
E080
|
