The BGS Lexicon of Named Rock Units — Result Details

Old Hythe Till Member

Computer Code: OHT Preferred Map Code: oht
Status Code: Full
Age range: Devensian Stage (QD) — Devensian Stage (QD)
Lithological Description: Diamicton, silty, clayey, stony, dark yellowish brown to dark grey, angular to well rounded clasts of psammite, quartzite, pink granite, Devonian and Triassic sandstone, amphibolite and (importantly) fresh gabbro and troctolite.
Definition of Lower Boundary: Gradational contact with underlying diamictons (including rafts) of the Whitehills Glacigenic Formation, or unconformable contact with Boyne Craig Till Formation, or on bedrock.
Definition of Upper Boundary: Generally the land surface or overlain conformably by glaciofluvial or glaciolacustrine deposits.
Thickness: >10m
Geographical Limits: Scotland Sheets 95 (Elgin) and 96W (Portsoy).
Parent Unit: Byth Till Formation (BYTIL)
Previous Name(s): Old Hythe Till Formation (-3595)
Upper Till (Unit 4) (-4235)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Sections in the western side of Boyne Limestone Quarry. Peacock, J D and Merritt, J W, 2000. 
Reference(s):
Peacock, J D and Merritt, J W. 2000. Glacial deposits at the Boyne Bay Limestone Quarry, Portsoy and their place in the late Pleistocene history of northeast Scotland. Journal of Quaternary Science. Vol.15, 543-555. 
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) 
Peacock, J D, 1966. Note on the drift sequence near Portsoy, Banffshire. Scottish Journal of Geology, Vol.2, 35-37. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S095 S096