The BGS Lexicon of Named Rock Units — Result Details
Accerhill Sandstone
Computer Code: | ACHS | Preferred Map Code: | AchS |
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Status Code: | Full | ||
Age range: | Chokierian Substage (CH) — Alportian Substage (CO) | ||
Lithological Description: | Fine- to coarse-grained sandstone, with sandstone seatearths and thin coals. | ||
Definition of Lower Boundary: | Underlain by grey mudstones of the Crossdale Mudstone, including the Isohomoceras sp. nov. Marine Band. | ||
Definition of Upper Boundary: | Overlain by marine siltstones and mudstones with the Homoceras undulatum Marine Band. | ||
Thickness: | 10 to 28m; thickest in the type area. | ||
Geographical Limits: | Lancaster Fells. | ||
Parent Unit: | Samlesbury Formation (SAML) | ||
Previous Name(s): | Accerhill Sandstone Formation [Obsolete Name and Code: Use ACHS]
(-4418)
Wellington Crag Sandstone [Obsolete Name And Code: Use ACHS] (WCR) Acer Hill Sandstone [Obsolete Entry: Incorrect Spelling: See ACHS] (AHSA) |
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Alternative Name(s): | Clintsfield Grit |
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Stratotypes: | |||
Type Area | The area around Accerhill (Farm) 5km south of Austwick. | ||
Type Section | Knott Coppy Borehole (SD76SE/6) [7698 6449]. 52.47 to 80.15 metres. | ||
Reference(s): | |||
Brandon, A, Aitkenhead, N, Crofts, R G, Ellison, R A, Evans, D J and Riley, JN 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). | |||
Waters, C N, Waters, R A, Barclay, W J, and Davies, J R. 2009. Lithostratigraphical framework for Carboniferous successions of Southern Great Britain (Onshore). British Geological Survey Research Report, RR/09/01. 184pp. | |||
1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
E059 E060 |