The BGS Lexicon of Named Rock Units — Result Details

Ballaugh Formation

Computer Code: BALGH Preferred Map Code: notEntered
Status Code: Full
Age range: Devensian Stage (QD) — Holocene Epoch (QH)
Lithological Description: Gravel-dominated sequences forming mountain front alluvial fans, commonly cryoturbated.
Definition of Lower Boundary: Generally alluvial fan gravels of the Ballaugh Formation unconformably overlie mixed sequence of the Orrisdale Formation [qv] (though some fan gravels interdigitate with deposits of the Orrisdale Formation). In other exposures the fan gravels overlie Lateglacial organic sediments of the Glen Balleira Formation.
Definition of Upper Boundary: Usually the ground surface.
Thickness: Unrecorded but diagrams suggest >20m thick locally.
Geographical Limits: Northern part of the Isle of Man (50k sheets 36 and possibly 46).
Parent Unit: Isle of Man Catchments Subgroup (IMCA)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Type Area  Ballaugh area, northwest part of the Isle of Man. Chadwick, R A, et al. (2001). 
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. 
Thomas, G S P. 1999. Northern England. 91-98 in Bowen, D Q (Editor), A revised correlation of Quaternary and Neogene deposits in the British Isles. Geological Society Special Report No.23. 
1:50K maps on which the lithostratigraphical unit is found, and map code used: