The BGS Lexicon of Named Rock Units — Result Details

Old Hythe Semipelite Member

Computer Code: OLHL Preferred Map Code: OlHL
Status Code: Full
Age range: Neoproterozoic Era (AZ) — Neoproterozoic Era (AZ)
Lithological Description: Finely interbedded semipelite and micaceous psammite with lenses of quartzite and white to cream metalimestone.
Definition of Lower Boundary: Sheared boundary with migmatitic semipelite and minor psammite of Cowhythe Psammite Formation.
Definition of Upper Boundary: Base of lowest massive metalimestone bed of Boyne Castle Limestone Member.
Thickness: c.150m on coastal section; progressively overstepped southwards by Whitehills Grit Formation. Sheared and tightly folded on coast.
Geographical Limits: From Moray Firth coast (Old Hythe to Boyne Bay) [NJ 6140 6630 - NJ 6155 6625] to Hill of Chattie [NJ 5900 6250].
Parent Unit: Boyne Limestone Formation (BOYL)
Previous Name(s): Old Hythe Limestone Member (-1744)
Lower Part Of Boyne Limestone (-3596)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Coastal section across Old Hythe Bay. 
Reference(s):
Stephenson, D and Gould, D , 1995. British Regional Geology: the Grampian Highlands (4th edition). (London: HMSO for the British Geological Survey), 67-68. 
Harris, A L, Haselock, P J, Kennedy, M J and Mendum, J R, 1994. The Dalradian Supergroup in Scotland, Shetland and Ireland. 33-53 in Gibbons, W E and Harris, A L (editors). A revised correlation of Precambrian rocks in the British Isles. Special Report of the Geological Society, London, No.22. 
Read, H H, 1923. Geology of the country around Banff, Huntly and Turriff, Lower Banffshire and north-west Aberdeenshire. Memoir of the Geological Survey, Scotland Sheets 86 and 96 (Scotland). 
Stephenson, D, et al. 1993. Stratigraphy and correlation of the Dalradian rocks of the East Grampian Project area. British Geological Survey Technical Report WA/93/91. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S096