The BGS Lexicon of Named Rock Units — Result Details
Crag Hill Limestone Member
| Computer Code: | CRHL | Preferred Map Code: | CrHL |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Cautleyan Stage (OU) — Cautleyan Stage (OU) | ||
| Lithological Description: | Nodular-bedded argillaceous limestone with siltstone partings. | ||
| Definition of Lower Boundary: | Not seen in any of the outcrops. | ||
| Definition of Upper Boundary: | Defined by the base of the overlying Sowerthwaite or Crummack Formations. | ||
| Thickness: | At least 30m | ||
| Geographical Limits: | Restricted to the Craven Inliers, North Yorkshire. | ||
| Parent Unit: | Norber Formation (NORB) | ||
| Previous Name(s): | Crag Hill Limestone [Obsolete Name and Code: Use CRHL]
(-2723)
Crag Hill Beds [Obsolete Name and Code: Use CRHL] (CRH) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Section | On the west side of Ribblesdale, northwest of Crag Hill Farm. Arthurton et al., 1988. | ||
| Reference(s): | |||
| 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). | |||
| Millward, D, and Stone, P. 2012. Stratigraphical framework for the Ordovician and Silurian sedimentary strata of northern England and the Isle of Man. British Geological Survey Research Report, RR/12/04. 119pp. | |||
| 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: | |||
| E050 E060 | |||