| Computer Code: |
TLM |
Preferred Map Code: |
TLM |
| Status Code: |
Full |
| Age range: |
Asturian Substage (CAS)
— Stephanian Stage (CS) |
| Lithological Description: |
Red-brown mudstones with subordinate thin red-brown and green, flaggy, fine- to coarse-grained sandstones with rare thin conglomeratic lenses. |
| Definition of Lower Boundary: |
At the first red-brown mudstone, above the highest mappable persistent red-brown sandstone of the Salop Formation. |
| Definition of Upper Boundary: |
At the change from red-brown mudstone, to the predominantly red-brown sandstone of the Kenilworth Sandstone Formation. |
| Thickness: |
280 m thick. |
| Geographical Limits: |
Extensive outcrops in the southern part of the Warwickshire Coalfield. |
| Parent Unit: |
Warwickshire Group (WAWK)
|
| Previous Name(s): |
Tile Hill Marl Group [Obsolete Name and Code: Use TLM]
(-2489)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Reference Section |
Mount Nod No.2 Borehole SP27NE/46. Basal 38.3 m of formation recorded as 'hard red marl' with 'sandy beds'. |
| Reference Section |
Tile Hill Railway Station Borehole SP27NE/1. Mudstones with subordinate sandstones recorded to 211.3 m depth. |
| Type Area |
Tile Hill,Warwickshire. Poor exposures, but see reference sections. |
| Reference Section |
Stream section north of Broad Lane, Tile Hill, in flaggy red-brown sandstone and interbedded mudstone. |
| Reference(s): |
| Old, R A, Sumbler, M G and Ambrose, K, 1987. Geology of the country around Warwick. Memoir of the British Geological Survey, Sheet 184 (England and Wales). |
| Powell, J H, Chisholm, JI, Bridge, D M, Rees, J G, Glover, B W and Besly, B M. 2000. Stratigraphical framework for Westphalian to Early Permian red-bed successions of the Pennine Basin. British Geological Survey Technical Report WA/99/10. |
| Shotton, F W, 1929. The geology of the country around Kenilworth (Warwickshire). Quarterly Journal of the Geological Society of London, Vol.28, 167 - 222. |
| Waters, C N, Smith, K, Hopson, P M, Wilson, D, Bridge, D M, Carney, J N, Cooper, A H, Crofts, R G, Ellison, R A, Mathers, S J, Moorlock, B S P, Scrivener, R C, McMillan, A A, Ambrose, K, Barclay, W J, and Barron, A J M. 2007. Stratigraphical Chart of the United Kingdom: Southern Britain. British Geological Survey, 1 poster. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E184
E183
E168
E169
|
