The BGS Lexicon of Named Rock Units — Result Details
Barrule Formation
| Computer Code: | BRUL | Preferred Map Code: | notEntered |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Arenig Series (OR) — Arenig Series (OR) | ||
| Lithological Description: | Dark grey to black mudstone. | ||
| Definition of Lower Boundary: | Faulted at the base against the Maughold Formation, which is distinguished by the loss of any sandstone/siltstone interbeds. | ||
| Definition of Upper Boundary: | In stratigraphical contact at the top with the Injebreck Formation, which is marked by a change from a mudstone/sandstone facies to a mudstone-dominated facies. | ||
| Thickness: | Up to 900 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)
Barrule Slates and Slieau Managh Slates [Obsolete Name and Code: Use BRUL] (-3244) Barrule Slates (Manx Slates) [Obsolete Name and Code: Use BRUL] (BRSL) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Area | South Barrule. Woodcock et al., 1999. | ||
| Reference(s): | |||
| 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). | |||
| Simpson A. 1963. The stratigraphy and tectonics of the Manx Slate Series. Quarterly Journal of the Geological Society of London, Vol. 119, 367-400 | |||
| 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. | |||
| Lamplugh G W. 1903. The geology of the Isle of Man. Memoir Geological Survey of Great Britain. | |||
| 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.) | |||
| 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 | |||