The BGS Lexicon of Named Rock Units — Result Details

Camphill Gelifluctate Bed

Computer Code: CHLGE Preferred Map Code: notEntered
Status Code: Full
Age range: Wolstonian Stage (QO) — Wolstonian Stage (QO)
Lithological Description: Gravel and diamicton gravel. Crudely bedded over pale olive brown and pale pinkish brown, pebble-cobble gravel, clast supported with a matrix of coarse quartzose or felsitic sand typically overlying matrix supported pebble gravel with a silty sand matrix. Clasts are very angular and subangular. Clast lithologies are dominated by felsite with subsidiary psammites, quartzites, basic igneous rocks and red and grey granites. Thin beds of rippled fine-medium quartzose sand are present locally. In Kirkhill quarry (infilled) frost cracks penetrate downwards from within this bed, through the underlying Kirkhill Palaeosol Bed into the Pitscow Sand and Gravel Formation. In Leys quarry (disused) truncated ice wedge casts also descend from the top of the bed down through the Kirkhill Palaeosol Bed into the Pitscow Sand and Gravel Formation beneath. Interpreted as periglacial talus and gelifluction deposits.
Definition of Lower Boundary: The lower boundary of the unit is gradational (typically over 0.05m) with organic sand of the underlying Swineden Sand Bed in Kirkhill Quarry (infilled). In Leys Quarry (disused) it unconformably overlies white sand of the truncated Kirkhill Palaeosol Bed.
Definition of Upper Boundary: In Kirkhill Quarry (infilled) the upper boundary of the unit is a subhorizontal, planar erosion surface overlain unconformably by yellowish brown diamicton of the Rottenhill Till Formation. In Leys Quarry (disused) the upper boundary of the unit is an erosional unconformity, with channels (up to 1m in depth) filled with sandy gravels of the West Leys Sand and Gravel Formation.
Thickness: To 2.5m
Geographical Limits: Buchan, northeast Scotland. The gelifluctate bed in only known within the immediate vicinity of Kirkhill quarry (infilled) (centred on NK 0120 5285) and Leys quarry (disused) (centred on NK 0040 5250) on Sheet 87W (Ellon).
Parent Unit: West Leys Sand And Gravel Formation (WLSG)
Previous Name(s): Kirkhill Gelifluctate Complex 2 (-3295)
Kirkhill Head 2 (-3927)
Kirkhill Gelifluctate Complex 3 (-4537)
Corse Member (-2083)
Camphill Gelifluctate Bed (CHLGE)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  East face, Kirkhill Quarry (infilled), 7km southeast of Stricken, Buchan, northeast Scotland. Note: The Camphill Gelifluctate Bed was well developed in all faces of Kirkhill quarry (infilled), but studied most extensively in the east, north and south faces. Connell, Hall and Romans, 1984. 
Reference Section  Northwest and northeast faces of Leys Quarry (disused), 6.5km southeast of Stricken, Buchan, northeast Scotland. Hall and Jarvis. 1993. 
Reference(s):
Connell, E R and Hall, A M. 2000. Kirkhill and Leys quarries. 65-67 in Merritt, J W, Connell, E R and Bridgland, D R (editors), The Quaternary of the Banffshire Coast and Buchan: Field Guide. (London: Quaternary Research Association.) 
Merritt, J W, Auton, C A, Connell, E R, Hall, A M and Peacock, J D. 2003. The Cainozoic geology and landscape evolution of north-east Scotland. Memoir of the British Geological Survey, Sheets 66E, 67, 76E, 77, 86E, 87W, 87E, 95, 96W, 96E and 97 (Scotland) 
Connell, E R, Hall, A M and Romans, J C C. 1984. Kirkhill Quarry. 57-81 in Hall, A M (Editor), Buchan Field Guide. (Cambridge: Quaternary Research Association.) 
Connell, E R, Edwards, K J and Hall, A M. 1982. Evidence for two pre-Flandrian palaeosols in Buchan, Scotland. Nature, 297, 570-572. 
Duller, G A T, Wintle, A F and Hall, A M. 1995. Luminescence dating and its application to key-pre-Late Devensian sites in Scotland. Quaternary Science Reviews, Vol.14, 495-519. 
Hall, A M and Connell, E R. 1991. The glacial deposits of Buchan, northeast Scotland. 129-136 in Ehlers, J, Gibbard, P L and Rose, J (editors), Glacial Deposits in Great Britain and Ireland. (Rotterdam: Balkema.) 
Merritt, J W, Connell, E R and Bridgland, D R (editors). 2000. The Quaternary of the Banffshire Coast and Buchan; Field Guide. (London: Quaternary Research Association.) 
Sutherland, D G. 1999. Scotland. 99-114 in Bowen D Q (Editor), A revised correlation of Quaternary deposits in the British Isles. Special Report of The Geological Society of London, No.23. 
Connell, E R and Hall, A M. 1987. The periglacial history of Buchan, Scotland. 277-285 in Boardman, J (Editor), Periglacial Processes and Landforms in Britain and Ireland. Periglacial processes in Britain and Ireland. Cambridge University Press, Cambridge. 
Hall, A M and Jarvis, J. 1993. Kirkhill. 225-230 in Gordon, J E and Sutherland, D G (editors), Quaternary of Scotland. Geological Conservation Review Series: 6. (London: Chapman and Hall.) 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable