The BGS Lexicon of Named Rock Units — Result Details

Kirkton Gelifractate Bed

Computer Code: KTNGF Preferred Map Code: notEntered
Status Code: Full
Age range: Anglian Stage (QA) — Wolstonian Stage (QO)
Lithological Description: Gravel. Typically clast supported with a matrix of coarse felsitic sand. Pale olive-brown and pale pinkish brown. Clasts are typically angular and subangular with rare subrounded shapes. Clast litholigies are dominated by felsite with rare quartzitic and psammitic metasedimentary rocks and red granite. It displays crude, medium scale, moderately high angle cross-bedding. Interpreted as periglacial gelifractate/talus.
Definition of Lower Boundary: The base of the unit was observed to sharply overlie, and be buttressed laterally against felsite bedrock at a channel/basin margin in the southeast face B of Kirkhill Quarry (infilled).
Definition of Upper Boundary: The upper boundary of the unit was observed in the southeast face B of Kirkhill Quarry (infilled) to be gradationally overlain by, and to interdigitate laterally with, felsitic sands and gravels of the Pitscow Sand and Gravel Formation.
Thickness: To 2m
Geographical Limits: Buchan, northeast Scotland. This bed is only known within Kirkhill Quarry (infilled) (centred on NK 0120 5285) on Sheet 87W (Ellon).
Parent Unit: Denend Gravel Formation (DNDGR)
Previous Name(s): Kirkhill Head 1 (-2886)
Kirkton Gelifluctate Bed (-4140)
Kirkhill Gelifluctate Complex 1 (-1008)
Kirkton Member (-1009)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Southeast face B, Kirkhill Quarry (infilled), 7km southeast of Stricken, Buchan, northeast Scotland. Connell, Hall and Romans. 1984. 
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.) 
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.) 
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.) 
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.) 
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.) 
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) 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable