The BGS Lexicon of Named Rock Units — Result Details

Scarlett Volcanic Member

Computer Code: SCV Preferred Map Code: notEntered
Status Code: Full
Age range: Brigantian Substage (CX) — Brigantian Substage (CX)
Lithological Description: The member is dominated by waterlain tuffs, basaltic lavas, submarine volcaniclastic debris flows and gravity slides. Olistoliths of older Dinantian carbonates and claystones also occur.
Definition of Lower Boundary: The base is clearly seen on the foreshore below Close-ny-Clollagh Point [SC 245 671], where volcaniclastic tuffs rest with a sharp, baked contact on underlying claystones of the Bowland Shale Formation.
Definition of Upper Boundary: The top is not exposed, so the nature of the upper boundary is unknown.
Thickness: 50m
Geographical Limits: The southern part of the Isle of Man, in the Castletown area, from Scarlett Point [SC 257 661] to Close-ny-Clollagh Point [SC 245 671].
Parent Unit: Bowland Shale Formation (BSG)
Previous Name(s): Scarlett Volcanic Formation (-517)
Scarlett Volcanic Series (-4320)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  Largely continuous coastal outcrops from Scarlett Point to Close-ny-Clollagh Point, where a strike section exists. The top is not seen, and the thickness of the Member is difficult to estimate due to numerous olistoliths and rolling dips in the outcrop. Dickson et al., 1987. 
Reference(s):
Lewis, H P. 1930. The Avonian succession in the south of the Isle of Man. Quarterly Journal of the Geological Society of London, 86, 234-290. 
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. 
Dickson, J A D, Ford, T D and Swift, A. 1987. The stratigraphy of the Carboniferous rocks around Castletown, Isle of Man. Proceedings of the Yorkshire Geological Society, Vol.46, 203-229. 
Lamplugh G W. 1903. The geology of the Isle of Man. Memoir Geological Survey of Great Britain 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable