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): Lower Part Of Boyne Limestone (-3596)
Old Hythe Limestone Member (-1744)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Coastal section across Old Hythe Bay. 
Reference(s):
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. 
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). 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S096