The BGS Lexicon of Named Rock Units — Result Details
Ireleth Member [Obsolete: use KENT]
| Computer Code: | IRE | Preferred Map Code: | Ire |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Cautleyan Stage (OU) — Cautleyan Stage (OU) | ||
| Lithological Description: | [Obsolete: use KENT] Pale to dark grey, massive or thickly bedded limestone, commonly pervasively recrystallised with bedding planes which are either stylotitic or totally obscured; dolomitisation and haematite staining common in the south of the inlier with the limestone becoming cavernous and mottled brown in colour. | ||
| Definition of Lower Boundary: | In Millom Park, it is a member within the Kirkley Bank Formation where it overlies volcaniclastic sandstone of the Low Scales Member; the base of the Ireleth Member is taken at the base of the limestone. Elsewhere the member overlies locally the Skiddaw Group and Borrowdale Volcanic Group. | ||
| Definition of Upper Boundary: | Defined by the base of a sequence of calcareous siltstone within the main part of the Kirkley Bank Formation. | ||
| Thickness: | Up to 30 m thick. | ||
| Geographical Limits: | Restricted to the Millom Park and the Furness inliers, Cumbria. | ||
| Parent Unit: | none recorded or not applicable | ||
| Previous Name(s): | Ireleth Limestone [Obsolete Name and Code: Use IRE]
(-2866)
High Haume Limestone [Obsolete Name and Code: Use IRE] (-1614) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Area | High Haume Beacon Johnson et al., 2001. | ||
| Reference(s): | |||
| Johnson, E W, Soper, N J, Burgess, I C, Ball, D F, Beddoe-Stephens, B, Carruthers, R M, Fortey, N J, Hirons, S, Merritt, J W, Millward, D, Roberts, B, Walker, A B and Young, B. 2001. Geology of the country around Ulverston. Memoir of the British Geological Survey, England and Wales, Sheet 48. | |||
| Rose, W C C. 1977. Geology and Hematite deposits of South Cumbria. Economic Memoir for 1:50,000 Sheet 58 and southern part of Sheet 48. Memoir of the geological Survey of Great Britain. | |||
| Sedgwick A. 1846. On the classification of the fossiliferous slates of Cumberland, Westmoreland and Lancashire. Quarterly Journal of the Geological Society of London, Vol 2, 106 - 122. | |||
| Kneller, B C, Scott R W, Soper N J, Johnson E W and Allen P M, 1994. Lithostratigraphy of the Windermere Supergroup, Northern England. Geological Journal, Vol. 29, 219-240. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E048 | |||