The BGS Lexicon of Named Rock Units — Result Details
Rain Gill Limestone Member
| Computer Code: | RNGL | Preferred Map Code: | RnGL |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Arundian Substage (CJ) — Arundian Substage (CJ) | ||
| Lithological Description: | Wackestones, floatstones and subordinate packstones, fine- to coarse-grained, cherty, muddy, dark-grey, thin- to thick-bedded, commonly with diffuse bed boundaries, interbedded with thin mudstones. Slumping is common. | ||
| Definition of Lower Boundary: | Not seen at type locality. Upward passage of underlying laminated calcisiltites and mudstones of the Hodder Mudstone Formation (undifferentiated) into wackestones and floatstones of the Raingill Limestone Member. | ||
| Definition of Upper Boundary: | Not seen at type locality. Passage of wackestones and floatstones of the Raingill Limestone Member into overlying laminated calcisiltites and mudstones of the Hodder Mudstone Formation (undifferentiated). | ||
| Thickness: | To 170m | ||
| Geographical Limits: | Restricted to the Ashnott [SD 69 48], Middop [SD 83 45], Slaidburn [SD 97 53] and Whitewell [SD 64 47] anticlines. | ||
| Parent Unit: | Hodder Mudstone Formation (HOM) | ||
| Previous Name(s): | Middop Limestone
(MDPL)
Middop Limestone (MDPL) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Section | Quarry 0.45km southwest of Rain Gill, Slaidburn. The base and top of the unit are not exposed at this locality. | ||
| Type Section | The best exposure in the Middop Anticline is in old quarry 0.5km eastsoutheast of Middop Hall. | ||
| Type Section | In the Ashnott area the unit is exposed in Bonstone Brook, downstream from the track to Ashnott Farm, 1.75km south of Newton. | ||
| Reference(s): | |||
| Earp, J R, Magraw, D, Poole, E G, Land, D H and Whiteman, A J, 1961. Geology of the country around Clitheroe and Nelson. Memoir of the Geological Survey of Great Britain, Sheet.68, England and Wales, pp.346. | |||
| 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. | |||
| Aitkenhead, N, Bridge, D M, Riley, N J, and Kimbell, S F. 1992. Geology of the country around Garstang. Memoir of the British Geological Survey, Sheet 67 (England and Wales) | |||
| Brandon, A, Aitkenhead, N, Crofts, R G, Ellison, R A, Evans, D J, and Riley, N J. 1998. Geology of the country around Lancaster. Memoir of the British Geological Survey, Sheet 59 (England and Wales). | |||
| Arthurton, R S, Johnson, E W, and Mundy, D J C. 1988. Geology of the country around Settle. Memoir of the British Geological Survey, Sheet 60 (England and Wales). | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E059 E067 | |||