The BGS Lexicon of Named Rock Units — Result Details

Glen Balleira Formation

Computer Code: GLNBA Preferred Map Code: notEntered
Status Code: Full
Age range: Devensian Stage (QD) — Devensian Stage (QD)
Lithological Description: Peat, organic mud and calcareous marl that infills kettlehole basins.
Definition of Lower Boundary: Unconformably overlies glacigenic deposits (diamictons, laminated muds, sands and gravels) of the Jurby and Orrisdale formations.
Definition of Upper Boundary: Usually the ground surface, but may be overlain by Holocene sediments (such as peat, with Holocene plant and insect remains, or brown sand).
Thickness: 2m of calcareous marl, capped by peaty clay, is recorded in a kettlehole infill at Glen Wyllin.
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
Stratotypes:
Type Area  Coastal cliff sections between Glen Balleira and Glen Wylin, c.0.5km west and northwest of Kirk Michael, Isle of Man. Chadwick, R A. et al. 2001. 
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. 
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. 
Ford, T D, Burnett, D and Quirk, D. 2001. The geology of the Isle of Man. Geologists' Association Guide 46, 2nd Edition. [London: Geologists' Association.] 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E400