The BGS Lexicon of Named Rock Units — Result Details

Rottenhill Till Formation

Computer Code: ROTIL Preferred Map Code: notEntered
Status Code: Full
Age range: Wolstonian Stage (QO) — Wolstonian Stage (QO)
Lithological Description: Diamicton, dominantly yellowish brown, very stiff non-calcareous, matrix supported, gravelly, slightly clayey, silty sand. Clast types include pebbles and cobbles of quartzitic and psammitic and pelitic metasedimentary rocks, phylite/slate, felsite, grey and red granites,mafic igneous rocks, red sandstone and red-stained quartzite. Clast fabric indicates glacial transport from the northwest. In the northwest and northeast faces of Leys Quarry (disused) thin beds of deformed and attenuated silty fine to medium sand are present. Interpreted as a subglacial till.
Definition of Lower Boundary: In Kirkhill Quarry (infilled) the basal boundary of the unit is a sharp, planar, subhorizontal unconformity. The till rests on units from the Camphill Gelifluctate Bed, the Swineden Sand Bed, the Kirkhill Palaeosol Bed down to the Pitscow Sand and Gravel Formation. It is also seen to unconformably overlie unweathered felsite bedrock close to the margins of channels/basins. In Leys Quarry (disused) the till has been observed to have a sharp, planar, subhorizontal, unconformable basal boundary on the West Leys Sand and Gravel Formation and the Camphill Gelifluctate Bed.
Definition of Upper Boundary: In Kirkhill Quarry (infilled) the upper boundary of the unit is a sharp, planar, subhorizontal, unconformity overlain by gravelly, sandy, silty diamicton of the Corsend Gelifluctate Bed. The uppermost part has undergone pedogenesis to form the Fernieslack Palaeosol Bed. In Leys Quarry (disused) the upper boundary of the unit is a sharp, undulatory, unconformity overlain by the Corse Diamicton Formation/Hythie Till Formation.
Thickness: To 2.5m
Geographical Limits: Buchan, northeast Scotland. The formation is currently 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). The unit might be regionally significant and present locally across northeast Scotland.
Parent Unit: East Grampian (Albion) Glacigenic Subgroup (EGAG)
Previous Name(s): Kirkhill Weathered Till (-2399)
Kirkhill Lower Till (-1794)
Rottenhill Member (-502)
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 Rottenhill Till Formation was well developed in all faces of Kirkhill Quarry (infilled), but studied most intensively in the east, north and south faces. Connell, Hall and Romans, 1984. 
Reference Section  Northeast face 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.) 
Connell, E R, Edwards, K J and Hall, A M. 1982. Evidence for two pre-Flandrian palaeosols in Buchan, Scotland. Nature, 297, 570-572. 
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.) 
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. 
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.) 
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.) 
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. 
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