The BGS Lexicon of Named Rock Units — Result Details

Ladyport Formation

Computer Code: LPT Preferred Map Code: notEntered
Status Code: Full
Age range: Arenig Series (OR) — Arenig Series (OR)
Lithological Description: A dark grey mudstone, with pale siltstone laminae and sandstone as thin to medium beds locally forming packets up to several tens of metres; debrite (pebbly mudstone) is well developed locally.
Definition of Lower Boundary: Faulted with the Glen Dhoo Formation, distinguished by a change from a mudstone-dominated facies to a siltstone/sandstone-dominated facies in the overlying Glen Dhoo formation.
Definition of Upper Boundary: Not seen.
Thickness: About. 250 m thick.
Geographical Limits: Isle of Man
Parent Unit: Manx Group (MANX)
Previous Name(s): Ladyport Formation [Obsolete Code: See LPT] (LPF)
Manx Group Undivided And Agneash Grits (-3328)
Lady Port Banded Group And Ballanayre Slump Breccia (-1044)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  Coastal section Will's Strand near Glen Mooar. 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). 
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. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E400