The BGS Lexicon of Named Rock Units — Result Details

Glen Rushen Formation

Computer Code: GLRN Preferred Map Code: notEntered
Status Code: Full
Age range: Arenig Series (OR) — Arenig Series (OR)
Lithological Description: Dark grey to black mudstone, with pale siltstone laminae.
Definition of Lower Boundary: In stratigraphical contact at the base with the Injebreck Fm, which is marked by a change from a mudstone/sandstone facies to a mudstone-dominated facies
Definition of Upper Boundary: In stratigraphical contact at the top with the Creggan Moar Fm, which is marked by a change from a mudstone-dominated facies to a mudstone/sandstone facies with manganiferous ironstone beds.
Thickness: From 250 m to 500 m thick.
Geographical Limits: Isle of Man.
Parent Unit: Manx Group (MANX)
Previous Name(s): Barrule Slates (-3243)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Glen Rushen slate quarries. Woodcock et al., 1999. 
Reference Section  Coast at Fheustal. Woodcock et al., 1999. 
Reference(s):
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. 
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). 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E400