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 [Obsolete Name and Code: Use GLRN, BRUL]
(-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): |
Waters, C N, Gillespie, M R, Smith, K, Auton, C A, Floyd, J D, Leslie, A G, Millward, D, Mitchell, W I, McMillan, A A, Stone, P, Barron, A J M, Dean, M T, Hopson, P M, Krabbendam, M, Browne, M A E, Stephenson, D, Akhurst, M C, and Barnes, R P. 2007. Stratigraphical Chart of the United Kingdom: Northern Britain. (British Geological Survey.) |
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
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