The BGS Lexicon of Named Rock Units — Result Details
Cleveland Ironstone Formation
| Computer Code: | CDI | Preferred Map Code: | Cdi |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Pliensbachian Age (JE) — Pliensbachian Age (JE) | ||
| Lithological Description: | Mudstone, silty, argillaceous siltstone and silty sandstone with seams of sideritic and berthierine-ooidal ironstone, which occur typically at the tops of small scale sedimentary cycles. | ||
| Definition of Lower Boundary: | Downward transition from shaly mudstone with scattered sideritic nodules to siltstone or sandstone of the Staithes Sandstone Formation. | ||
| Definition of Upper Boundary: | At top of highest ooidal ironstone or at top of row of hard sideritic nodules, succeeded by grey mudstone of the Whitby Mudstone Formation. | ||
| Thickness: | To c.25 m. | ||
| Geographical Limits: | Cleveland Basin, North Yorkshire. | ||
| Parent Unit: | Lias Group (LI) | ||
| Previous Name(s): | Kettleness Beds [Obsolete Name and Code: Use CDI]
(-3286)
Cleveland Ironstone Series [Obsolete Name and Code: Use CDI] (-2065) Ironstone Series [Obsolete Name and Code: Use CDI, NS] (*57) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Area | North Yorkshire coast. | ||
| Type Section | Coastal exposures near Staithes, North Yorkshire (Penny Nab [NZ 788 189] to Brackenberry Wyke [NZ 794 183]). | ||
| Reference Section | Coastal exposures at Hawsker Bottoms, North Yorkshire (between Clockcase Nab [NZ 955 071] and Hawsker High Scar [NZ 952 075]). | ||
| Reference(s): | |||
| Cox, B M, Sumbler, M G, and Ivimey-Cook, H C. 1999. A Formational framework for the Lower Jurassic of England and Wales (Onshore Area). British Geological Survey Research Report No. RR/99/01. | |||
| Howarth, M K, 1973. The stratigraphy and ammonite fauna of the Upper Liassic Grey Shales of the Yorkshire coast. Bulletin of the British Museum (Natural History), Geology Series, Vol.29, 235-288. | |||
| Waters, C N, Smith, K, Hopson, P M, Wilson, D, Bridge, D M, Carney, J N, Cooper, A H, Crofts, R G, Ellison, R A, Mathers, S J, Moorlock, B S P, Scrivener, R C, McMillan, A A, Ambrose, K, Barclay, W J, and Barron, A J M. 2007. Stratigraphical Chart of the United Kingdom: Southern Britain. British Geological Survey, 1 poster. | |||
| Howard, A S, 1985. Lithostratigraphy of the Staithes Sandstone and Cleveland Ironstone formations (Lower Jurassic) of north-east Yorkshire. Proceedings of the Yorkshire Geological Society, Vol.45, 261-275. | |||
| Howarth, M K, 1955. Domerian of the Yorkshire coast. Proceedings of the Yorkshire Geological Society, Vol.30, 147-175. | |||
| Hemingway, J E, Wilson, V and Wright, C W, 1963. Geology of the Yorkshire coast. Geologists' Association Guide, No.34. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E062 E043 E035 E044 E042 E052 E054 E055 E065 E064 | |||