The BGS Lexicon of Named Rock Units — Result Details

Bellman Limestone Member

Computer Code: BMNL Preferred Map Code: notEntered
Status Code: Full
Age range: Chadian Substage (CI) — Chadian Substage (CI)
Lithological Description: Waulsortian biohermal limestones with subordinate packstones,wackestones and grainstones.
Definition of Lower Boundary: Taken at the base of the lowest Waulsortian limesotne above the packstones and grainstones of the Peach Quarry Limestone Member. Where the latter is absent, the base of the member rests conformably upon dark grey fissile mudstones and packstones of the "Upper Coplow Shales".
Definition of Upper Boundary: The Waulsortian limestones are overlain unconformably by mudstones of the Hodder Mudstone Formation.
Thickness: Up to 800 m thick.
Geographical Limits: Craven Basin, limited to the Clitheroe Anticline [SD 74] and northern limb of the Whitewell Antivline [SD 64].
Parent Unit: Clitheroe Limestone Formation (CLL)
Previous Name(s): Salthill Bank Beds (-3229)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Reference Section  Good exposure in the A59 road-cut], 2.9 kn north-east of Clitheroe Castle. 
Partial Type Section  Bellman Quarry, north-east face, 3 km north-east of Clitheroe Castle: also asection in the top 21 m seen in the southern part of quarry. Earp et al., 1961. 
Reference Section  Large quarry at Twiston, 7.2 km north-east of Clitheroe Castle: the eastern part shows a thickly bedded crinodal limestone passing to a dark, massive calcareous siltsone in the western part. Earp et al., 1961. 
Reference(s):
Cossey, P J, Adams, A E, Purnell, M A, Whiteley, M J, Whyte, M A and Wright, V P. 2004. British Lower Carboniferous stratigraphy. Geological Conservation Review Series No.29. Joint Nature Conservation Committee, Peterborough. 
Riley N J. 1990. Stratigraphy of the Worston Shale Group (Dinantian) Craven Basin, north-west England. Proceedings of the Yorkshire Geological Society, Vol. 48, 163-187. 
Miller, J and Grayson, R F. 1972. Origin and structure of the Lower Visean "reef" limestones near Clitheroe, Lancashire. Proceedings of the Yorkshire Geological Society, Vol. 38, 607-638. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E067 E068