The BGS Lexicon of Named Rock Units — Result Details
Brotherton Formation
| Computer Code: | BTH | Preferred Map Code: | Bth |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Guadalupian Epoch (PUG) — Lopingian Epoch (PUL) | ||
| Lithological Description: | Limestone, dolomitic, grey with abundant Calcinema. | ||
| Definition of Lower Boundary: | Upward transition from mudstones of underlying Edlington Formation. | ||
| Definition of Upper Boundary: | Upward passage into Billingham Anhydrite, or, where that is absent, the Roxby Formation. | ||
| Thickness: | 0-20m | ||
| Geographical Limits: | Crops out from north Nottinghamshire to north Yorkshire. Pinches out south-west of a line from Worksop to Newark. Equivalent to Seaham Formation of Co. Durham. | ||
| Parent Unit: | Zechstein Group (ZG) | ||
| Previous Name(s): | Magnesian Limestone (Yorkshire), Upper [Obsolete Name And Code: Use BTH]
(UMLY)
Magnesian Limestone (of Yorkshire), Upper [Obsolete Name and Code: Use BTH] (-2030) Brotherton Beds [Obsolete Name and Code: Use BTH] (-3250) Brotherton (Magnesian Limestone) Formation [Obsolete Name and Code: Use BTH] (-3879) Upper Magnesium Limestone (-92) |
||
| Alternative Name(s): | Seaham Formation |
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| Stratotypes: | |||
| Type Area | Numerous disused quarries around Brotherton, North Yorkshire (Smith et al, 1968). | ||
| Reference(s): | |||
| Smith, D B, Harwood, G M, Pattison, J and Pettigrew, T H. 1986. A revised nomenclature for Upper Permian strata in eastern England. 9-17 in Harwood, G M and Smith, D B (editors). The English Zechstein and Related Topics. Geological Society Special Publication No.22. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E062 E033 E070 E052 E078 E090 E082 E043 E126 E042 E087 E072 E081 E091 E115 E127 | |||