The BGS Lexicon of Named Rock Units — Result Details
Great Row Member
| Computer Code: | GTR | Preferred Map Code: | notEntered |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Bolsovian Substage (CC) — Bolsovian Substage (CC) | ||
| Lithological Description: | Grey mudstones and siltstones with seatearths, numerous ironstones and thick coals. Channel sandstones are locally important. | ||
| Definition of Lower Boundary: | Base of the Cannel Row Coal. | ||
| Definition of Upper Boundary: | Base of the Bassey Mine Coal. | ||
| Thickness: | Up to 92 m in Parkhouse Colliery. | ||
| Geographical Limits: | North Staffordshire Coalfield, although not shown on the map. | ||
| Parent Unit: | Pennine Upper Coal Measures Formation (PUCM) | ||
| Previous Name(s): | Great Row Measures [Obsolete Name and Code: Use GTR]
(-2836)
Great Row Formation [Obsolete Name and Code: Use GTR] (-4691) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Reference Section | Holts Barn Borehole SJ93NW/2: full thickness from 423.75 m to 376.0 m depth. Earp & Calver, 1961. | ||
| Reference(s): | |||
| Earp, J R and Calver, M A. 1961. Exploratory boreholes in the North Staffordshire Coalfield. Bulletin of the Geological Survey of Great Britain, Vol. 17, 153-190. | |||
| Rees, J G and Wilson, A A. 1998. Geology of the country around Stoke-on-Trent. Memoir of the British Geological Survey, Sheet 123 (England and Wales). | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E123 | |||