The BGS Lexicon of Named Rock Units — Result Details

Accerhill Sandstone

Computer Code: ACHS Preferred Map Code: AchS
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): Acer Hill Sandstone [Obsolete Entry: Incorrect Spelling: See ACHS] (AHSA)
Accerhill Sandstone Formation [Obsolete entry, use ACHS] (-4418)
Wellington Crag Sandstone [Obsolete Name And Code: Use ACHS] (WCR)
Alternative Name(s): Clintsfield Grit
Stratotypes:
Type Section  Knott Coppy Borehole (SD76SE/6) [7698 6449]. 52.47 to 80.15 metres. 
Type Area  The area around Accerhill (Farm) 5km south of Austwick. 
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