The BGS Lexicon of Named Rock Units — Result Details

Santon Member

Computer Code: SNTN Preferred Map Code: notEntered
Status Code: Full
Age range: Arenig Series (OR) — Arenig Series (OR)
Lithological Description: A thin to medium-bedded sandstone, interbedded with laminated mudstone and siltstone; sandstone predominantly wacke but includes quartz arenite. The unit contains more abundant sandstone and is more thickly bedded, distinguishing it friom the units above and below.
Definition of Lower Boundary: Stratigraphical with undivided Lonan Formation
Definition of Upper Boundary: Not seen
Thickness: At least 600 m thick.
Geographical Limits: Isle of Man.
Parent Unit: Lonan Formation (LNN)
Previous Name(s): Lonan And Niarbyl Flags (-2206)
Santon Formation (-4891)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Coastal section Baltic Rock to Santon Head. Woodcock et al., 1999. 
Reference(s):
Chadwick, R A, Jackson, D I, Barnes, R P, Kimbell, G S, Johnson, H, Chiverell, R C, Thomas, G S P, Jones, N S, Riley, N J, Pickett, E A, Young, B, Holliday, D W, Ball, D F, Molyneux, S G, Long, D, Power, G M and Roberts, D H. 2001. Geology of the Isle of Man and its offshore area. British Geological Survey Research Report, RR/01/06. 
Geological Survey. 1898. Isle of Man. Sheet 36,45,46 and 57. Solid and Drift geology. 1:63 360 scale. Reprinted at 1:50 000 scale by Institute of Geological Sciences 1975 (Southampton: Ordnance Survey). 
Lamplugh G W. 1903. The geology of the Isle of Man. Memoir Geological Survey of Great Britain 
Simpson A. 1963. The stratigraphy and tectonics of the Manx Slate Series. Quarterly Journal of the Geological Society of London, Vol. 119, 367-400 
Woodcock N H, Morris J H, Quirk D G, Barnes R P, Burnett D, Fitches W R, Kennan P S and Power G M. 1999. Revised lithostratigraphy of the Manx Group, Isle of Man. 45-68 in 'In sight of the suture' the Palaeozoic geology of the Isle of Man in its lapetus Ocean context. Woodcock N H, Fitches W R, Quirk D G and Barnes R P [editors]. Geological Society of London, Special Publication No. 160. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E400