The BGS Lexicon of Named Rock Units — Result Details

Mull Hill Formation

Computer Code: MHL Preferred Map Code: notEntered
Status Code: Full
Age range: Arenig Series (OR) — Arenig Series (OR)
Lithological Description: A pale grey, thin to thick-bedded quartz arenite sandstonr, peripheral parts with interbedded laminated mudstone and siltstone
Definition of Lower Boundary: The stratigraphical with the Lonan Formation at the base, is marked by a change from a mudstone-dominated facies to a sandstone-dominated facies
Definition of Upper Boundary: The stratigraphical contact at the top is marked by a change from a sandstone-dominated facies to mudstone-dominated facies.
Thickness: 40-400 m
Geographical Limits: Isle of Man
Parent Unit: Manx Group (MANX)
Previous Name(s): Maughold Banded Group (-2687)
Agneash Grits (-2075)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  The west side Chapel Bay, Port St Mary. Woodcock et al., 1999. 
Reference(s):
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). 
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 
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