The BGS Lexicon of Named Rock Units — Result Details

Longnor Sandstone

Computer Code: LOS Preferred Map Code: LoS
Status Code: Full
Age range: Kinderscoutian Substage (CK) — Kinderscoutian Substage (CK)
Lithological Description: Sandstone, medium-grained, massive, sporadic mud-pellets, sub-arkosic, feldspathic; argillaceous in lower part. Sourced from the northwest.
Definition of Lower Boundary: The lower boundary is taken at the base of the first sandstone-dominated unit above fissile mudstones that include a Reticuloceras reticulatum Marine Band.
Definition of Upper Boundary: The upper boundary is taken at the base of a mudstone-dominated succession with black fissile mudstone including a Bilinguites gracilis Marine Band overlying the Longnor Sandstone.
Thickness: 200 to 240m
Geographical Limits: Stanley Moor reservoir [SK042 710]; Hulme end [SK 106 590]; Swythamley [SJ971 647].
Parent Unit: Hebden Formation (HEBD)
Previous Name(s): Longnor Grit (-1042)
Yoredale Grit (-2917)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Partial Type Section  Golling Gate Borehole (Hollinsclough, Derbyshire) (SK06NE/23), proves the upper 73.2 m of the unit, form 1.8-75.0 m below ground level (Aitkenhead et al., 1985). 
Partial Type Section  Stoop Borehole (Dove Head, Derbyshire) (SK06NE/20), from 0 to 35.04 m below ground level (this is the basal 35.04 m of the unit) (Aitkenhead et al., 1985). 
Reference(s):
Bisat, W S and Hudson, R G S. 1943. The Lower Reticuloceras (R1) goniatite succession in the Namurian of the North of England. Proceedings of the Yorkshire Geological Society, Vol. 24 Pt. 6, 383-438. 
Aitkenhead, N, Chisholm, J I and Stevenson, I P. 1985. Geology of the country around Buxton, Leek and Bakewell. Memoir of the British Geological Survey, England and Wales Sheet 111. 
Hull, E and Green, A H. 1866. The Geology of the country around Stockport, Macclesfield, Congleton and Leek. Memoir of the Geological Survey of Great Britain. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E111