| Computer Code: |
NGN |
Preferred Map Code: |
notEntered |
| Status Code: |
Full |
| Age range: |
Arenig Series (OR)
— Arenig Series (OR) |
| Lithological Description: |
Thin to medium-bedded sandstone, interbedded with laminated mudstone and siltstone. The sandstone is more abundant and more thickly bedded than in the units above and below. |
| Definition of Lower Boundary: |
Stratigraphical with undivided Lonan Formation. |
| Definition of Upper Boundary: |
Stratigraphical with Maughold Formation. |
| Thickness: |
At least 250 m thick. |
| Geographical Limits: |
Isle of Man. |
| Parent Unit: |
Lonan Formation (LNN)
|
| Previous Name(s): |
Ny Garvain Formation [Obsolete Name and Code: Use NGN]
(-3577)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
Coastal section Port Cornaa to Traie Farkan. 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. |
| Lamplugh G W. 1903. The geology of the Isle of Man. Memoir Geological Survey of Great Britain. |
| 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. |
| 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 |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E400
|
