The BGS Lexicon of Named Rock Units — Result Details
Middle Coal (Farrington Member, Somerset)
| Computer Code: | MLEC | Preferred Map Code: | notEntered |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Asturian Substage (CAS) — Asturian Substage (CAS) | ||
| Lithological Description: | Coal, although where the deposit splits into two seams, it is separated into two by by a band of seatearth around Old Mills Colliery [364500, 155500], whereas further away from the divide this, becomes 12 m of hard mudstone and fireclay, near Greyfield Colliery [364000, 158700]. | ||
| Definition of Lower Boundary: | The base of the bed is taken at the base of the coal resting upon about 9 m of hard mudstone of the underlying undivided Farrington Member. | ||
| Definition of Upper Boundary: | The top of the coal is overlain by sandstone, which forms a hard roof, of the Middle Vein Greys. Elsewhere a planty shale developed between the coal and the sandstone of the surrounding Farrington Member. | ||
| Thickness: | A thin coal, about 46 cm thick at Dunkerton in the northeast of the Somerset Coalfield, to 71 cm thick at Farrington in the southwest of the coalfield. | ||
| Geographical Limits: | No.5 Vein, comprising the Dabchick and Peacock veins at Greyfield Colliery; Bromley No.4, -Possible correspondence; Smith's Vein. | ||
| Parent Unit: | Farrington Member (FRF) | ||
| Previous Name(s): | Middle Vein [Obsolete Name and Code: Use MLEC, MDDC]
(-3549)
Middle Coal (Somerset) [Obsolete Name and Code: Use MLEC, MDDC] (-1056) |
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| Alternative Name(s): | No.5 Vein [Obsolete: use NO5C] Bromley No. 4 Smith's Vein |
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| Stratotypes: | |||
| none recorded or not applicable | |||
| Reference(s): | |||
| Down, C G and Warrington, A J. 1971. The history of the Somerset Coalfield. [Newton Abbot: David and Charles.] | |||
| Kellaway, G A. 1967. The correlation of the Upper Coal Measures of the Forest of Dean, Bristol and Somerset coalfields with those of the Midlands of England. In: Abstracts [of the] 6th International Congress of Carboniferous Stratigraphy and Geology, Sheffield, 1967. | |||
| Collier, P. 1986. Collier's Way: History and walks in the Somerset Coalfield. [Bradford-on-Avon: Ex-Libris Press.] | |||
| Kellaway, G A and Welch, F B A. 1993. Geology of the Bristol district. Memoir of the British Geological Survey Special Sheet [England and Wales]. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E264 E280 E281 | |||