The BGS Lexicon of Named Rock Units — Result Details

Linkbrae Limestone Member

Computer Code: LINK Preferred Map Code: Link
Status Code: Full
Age range: Neoproterozoic Era (AZ) — Neoproterozoic Era (AZ)
Lithological Description: Metalimestone, white to grey, thin-bedded, with thin interbeds of calc-silicate rock.
Definition of Lower Boundary: Not seen in outcrop (blown sand), but observed in Sandend Bay borehole; sharp transition from psammite and semipelite, muscovite-rich, banded pale grey and greenish with some calc-silicate beds.
Definition of Upper Boundary: Not seen (blown sand); probably sharp transition to muscovite-rich semipelite.
Thickness: Over 35m
Geographical Limits: Extends southsouthwest from coast section in Sandend Bay [NJ 558 664] for c.400m. A limestone bed at Cairnton [NJ 544 635] may belong to this unit.
Parent Unit: Tarnash Phyllite And Limestone Formation (TNPL)
Previous Name(s): Middle Part Of Sandend Group (-3525)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Partial Type Section  Disused, flooded quarry in middle of raised beach, Sandend Bay. 
Reference(s):
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 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. 
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